feat: initially check syntax when opening document

Reviewed-on: #37

Clients/Intellij/.idea/misc.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_23" default="true" project-jdk-name="openjdk-23" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" project-jdk-name="openjdk-23" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

Clients/Intellij/build.gradle

@@ -1,28 +0,0 @@
-plugins {
-    id 'java'
-    id 'org.jetbrains.intellij.platform' version '2.2.1'
-
-}
-
-group = 'org.example'
-version = '1.0-SNAPSHOT'
-
-repositories {
-    mavenCentral()
-    maven { url "https://jitpack.io" }
-
-    intellijPlatform {
-        defaultRepositories()
-    }
-}
-
-
-dependencies {
-    testImplementation platform('org.junit:junit-bom:5.10.0')
-    testImplementation 'org.junit.jupiter:junit-jupiter'
-    implementation "com.github.Ballerina-Platform.lsp4intellij:lsp4intellij:master-SNAPSHOT"
-}
-
-test {
-    useJUnitPlatform()
-}

Clients/Intellij/build.gradle.kts

@@ -0,0 +1,41 @@
+plugins {
+    id("org.jetbrains.intellij") version "1.17.3"
+    kotlin("jvm") version "1.9.0"
+}
+
+group = "com.example"
+version = "1.0.0"
+
+repositories {
+    mavenCentral()
+    maven { url = uri("https://jitpack.io") }
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation("com.github.ballerina-platform:lsp4intellij:0.9.0")
+}
+
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_17
+    targetCompatibility = JavaVersion.VERSION_17
+}
+
+tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+}
+
+
+intellij {
+    version.set("2023.3")
+}
+
+tasks {
+    patchPluginXml {
+        sinceBuild.set("233")
+        untilBuild.set("233.*")
+    }
+}

Clients/Intellij/installation.md

@@ -0,0 +1,13 @@
+# Installation des Intellij Language Clients
+
+Um den Language Client für Intellij installieren zu können, kann die Erweiterung
+[LSP4IJ](https://plugins.jetbrains.com/plugin/23257-lsp4ij) installiert werden.
+
+## Installation
+1. Installiere [LSP4IJ](https://plugins.jetbrains.com/plugin/23257-lsp4ij)
+2. Öffne den Language Server Tab
+3. Füge einen neuen Language-Server hinzu
+4. Vergebe einen Namen und füge folgenden Command hinzu: `java -jar "<path/to/LanguageServer.jar>`
+5. Füge unter Mappings -> File name patterns *.jav und Language ID java_tx hinzu
+6. öffne eine Datei mit Dateiendung .jav
+7. Fertig

Clients/Intellij/src/main/kotlin/kotlin/com/example/lsp/PreloadActivityTX.java

@@ -0,0 +1,14 @@
+package kotlin.com.example.lsp;
+
+import com.intellij.openapi.application.PreloadingActivity;
+import com.intellij.openapi.progress.ProgressIndicator;
+import org.wso2.lsp4intellij.IntellijLanguageClient;
+import org.wso2.lsp4intellij.client.languageserver.serverdefinition.RawCommandServerDefinition;
+
+public class PreloadActivityTX extends PreloadingActivity {
+    @Override
+    public void preload(ProgressIndicator indicator) {
+        String[] command = new String[]{"java", "-jar", "/JavaTXLanguageServer-1.0-SNAPSHOT-jar-with-dependencies.jar"};
+        IntellijLanguageClient.addServerDefinition(new RawCommandServerDefinition("jav", command));
+    }
+}

Clients/Intellij/src/resources/META-INF/plugin.xml

@@ -13,7 +13,7 @@ see also jetbrains documentation: https://plugins.jetbrains.com/docs/intellij/pl
 
     <extensions defaultExtensionNs="com.intellij">
         <!-- register a preloading activity. You need to init IntellijLanguageClient with your config, see readme -->
-        <preloadingActivity implementation="your.plugin.MyPreloadingActivity" id="your.plugin.MyPreloadingActivity"/>
+        <preloadingActivity implementation="kotlin.com.example.lsp.PreloadActivityTX" id="kotlin.com.example.lsp.PreloadActivityTX"/>
 
         <!-- register intellijLanguageClient as a Service OR as a plugin component (see readme)... -->
         <applicationService serviceImplementation="org.wso2.lsp4intellij.IntellijLanguageClient"/>

Clients/VisualStudioCode/.vscodeignore

@@ -9,3 +9,7 @@ vsc-extension-quickstart.md
 **/*.map
 **/*.ts
 **/.vscode-test.*
+
+!JavaTXLanguageServer-1.0-SNAPSHOT-jar-with-dependencies.jar
+
+!JavaTXLanguageServer-1.0-SNAPSHOT-jar-with-dependencies.jar

Clients/VisualStudioCode/package.json

@@ -1,8 +1,9 @@
 {
-  "name": "lspclient",
-  "displayName": "LSPClient",
-  "description": "",
-  "version": "0.0.1",
+  "icon": "TX.png",
+  "name": "java-tx-language-extension",
+  "displayName": "Java-TX Language Extension",
+  "description": "The Language Extension for Java-TX with Typehints and Syntax Checks",
+  "version": "0.0.5",
   "engines": {
     "vscode": "^1.94.0"
   },
@@ -16,8 +17,8 @@
   "contributes": {
     "commands": [
       {
-        "command": "lspclient.helloWorld",
-        "title": "Hello World"
+        "command": "tx.restartLanguageServer",
+        "title": "TX: Restart Language Server"
       }
     ]
   },

Clients/VisualStudioCode/src/extension.ts

@@ -1,39 +1,30 @@
-// The module 'vscode' contains the VS Code extensibility API
-// Import the module and reference it with the alias vscode in your code below
-
 import * as vscode from 'vscode';
-import { workspace, ExtensionContext } from 'vscode';
 import {
   LanguageClient,
   LanguageClientOptions,
-	ServerOptions,
-	TransportKind
+  ServerOptions
 } from 'vscode-languageclient/node';
 
+let client: LanguageClient | undefined;   // <— global, damit wir neu starten können
 
-
-
-// This method is called when your extension is activated
-// Your extension is activated the very first time the command is executed
-export function activate(context: vscode.ExtensionContext) {
-
-
-	
+function createClient(context: vscode.ExtensionContext): LanguageClient {
   const workspaceFolder = context.extensionPath;
+
   const serverOptions: ServerOptions = {
     run: {
       command: 'java',
-			args: ['-jar', workspaceFolder + "/JavaTXLanguageServer-1.0-SNAPSHOT-jar-with-dependencies.jar"], // Absolute Pfadangabe
+      args: ['-Xss2m', '-jar', workspaceFolder + "/JavaTXLanguageServer-1.0-SNAPSHOT-jar-with-dependencies.jar"],
     },
     debug: {
       command: 'java',
-			args: ['-jar', workspaceFolder + "/JavaTXLanguageServer-1.0-SNAPSHOT-jar-with-dependencies.jar"], // Absolute Pfadangabe für Debug
+      args: [
+      '-Xss2m',
+      '-jar',
+      workspaceFolder + '/JavaTXLanguageServer-1.0-SNAPSHOT-jar-with-dependencies.jar',
+    ],
     }
   };
 
-	console.log("SERVER CREATED.")
-	console.log(workspaceFolder)
-	// Clientoptionen: definiere, welche Dateitypen der Client unterstützt
   const clientOptions: LanguageClientOptions = {
     documentSelector: [{ scheme: 'file', language: 'java' }],
     synchronize: {
@@ -42,37 +33,53 @@ export function activate(context: vscode.ExtensionContext) {
     revealOutputChannelOn: 4
   };
 
-	
-	// Language Client erstellen und starten
-	const client = new LanguageClient(
-		'javaTxLanguageServer',      // ID des Clients
-		'Java-TX Language Server',    // Name des Clients
+  return new LanguageClient(
+    'javaTxLanguageServer',
+    'Java-TX Language Server',
     serverOptions,
     clientOptions
   );
-
-	// Client starten
-	client.start().then(() => {
-		console.log("Language Client erfolgreich gestartet");
-	}).catch(error => {
-		console.error("Fehler beim Starten des Language Clients:", error);
-	});
-
-	// Use the console to output diagnostic information (console.log) and errors (console.error)
-	// This line of code will only be executed once when your extension is activated
-	console.log('Congratulations, your extension "tx" is now active!');
-
-	// The command has been defined in the package.json file
-	// Now provide the implementation of the command with registerCommand
-	// The commandId parameter must match the command field in package.json
-	const disposable = vscode.commands.registerCommand('lspclient.helloWorld', () => {
-		// The code you place here will be executed every time your command is executed
-		// Display a message box to the user
-		vscode.window.showInformationMessage('Hello World from TX!');
-	});
-
-	context.subscriptions.push(disposable);
 }
 
-// This method is called when your extension is deactivated
-export function deactivate() { }
+export async function activate(context: vscode.ExtensionContext) {
+  client = createClient(context);
+
+  client.start()
+    .then(() => console.log("Language Client erfolgreich gestartet"))
+    .catch(err => console.error("Fehler beim Starten des Language Clients:", err));
+
+  console.log('Congratulations, your extension "tx" is now active!');
+
+  // Beispiel-Command aus deinem Code bleibt
+  const hello = vscode.commands.registerCommand('lspclient.helloWorld', () => {
+    vscode.window.showInformationMessage('Hello World from TX!');
+  });
+  context.subscriptions.push(hello);
+
+  // *** NEU: Restart-Command ***
+  const restart = vscode.commands.registerCommand('tx.restartLanguageServer', async () => {
+    if (!client) {
+      vscode.window.showWarningMessage('Language Client ist nicht initialisiert.');
+      return;
+    }
+    try {
+      await client.stop();   // stoppt den Serverprozess
+      client.dispose();      // räumt Ressourcen auf
+    } catch (e) {
+      console.error('Fehler beim Stoppen des Language Clients:', e);
+    }
+    client = createClient(context); // komplett neu erzeugen
+    try {
+      await client.start();
+      vscode.window.showInformationMessage('Java-TX Language Server neu gestartet.');
+    } catch (e) {
+      console.error('Fehler beim Neustarten des Language Clients:', e);
+      vscode.window.showErrorMessage('Neustart des Language Servers fehlgeschlagen – Details in der Konsole.');
+    }
+  });
+  context.subscriptions.push(restart);
+}
+
+export function deactivate(): Thenable<void> | undefined {
+  return client?.stop();
+}

LanguageServer/pom.xml

@@ -20,6 +20,11 @@
             <artifactId>antlr4</artifactId>
             <version>4.11.1</version>
         </dependency>
+        <dependency>
+            <groupId>io.github.java-diff-utils</groupId>
+            <artifactId>java-diff-utils</artifactId>
+            <version>4.12</version>
+        </dependency>
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
@@ -75,6 +80,12 @@
             <version>0.1</version>
         </dependency>
     </dependencies>
+    <properties>
+        <!-- Setzt Java 21 als globale Version -->
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <maven.compiler.release>21</maven.compiler.release>
+    </properties>
 
     <build>
         <plugins>
@@ -96,6 +107,7 @@
                 <configuration>
                     <source>21</source>
                     <target>21</target>
+                    <release>21</release>
                 </configuration>
             </plugin>
 

LanguageServer/src/main/java/de/dhbw/JavaTXLanguageServer.java

@@ -8,7 +8,6 @@ import org.eclipse.lsp4j.services.TextDocumentService;
 import org.eclipse.lsp4j.services.WorkspaceService;
 import org.eclipse.lsp4j.services.LanguageServer;
 
-import java.net.URI;
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
 /**

LanguageServer/src/main/java/de/dhbw/JavaTXTextDocumentService.java

@@ -1,50 +1,76 @@
 package de.dhbw;
 
-import com.google.common.base.Stopwatch;
+import de.dhbw.handler.*;
+import de.dhbw.service.CacheService;
+import de.dhbw.service.ClientService;
+import de.dhbw.service.LogService;
 import de.dhbw.helper.CodeSnippetOptions;
+import de.dhbw.helper.ConversionHelper;
 import de.dhbw.helper.TextHelper;
 import de.dhbw.helper.TypeResolver;
-import de.dhbw.model.LSPVariable;
 import de.dhbw.model.SnippetWithName;
-import de.dhbw.model.Type;
-import de.dhbwstuttgart.languageServerInterface.LanguageServerInterface;
-import de.dhbwstuttgart.languageServerInterface.ParserInterface;
-import de.dhbwstuttgart.languageServerInterface.model.ParserError;
-import org.apache.log4j.LogManager;
-import org.apache.log4j.Logger;
+import de.dhbw.service.ParserService;
 import org.eclipse.lsp4j.*;
 import org.eclipse.lsp4j.jsonrpc.messages.Either;
 import org.eclipse.lsp4j.services.LanguageClient;
 import org.eclipse.lsp4j.services.TextDocumentService;
 
-import java.io.File;
-import java.io.IOException;
 import java.net.URI;
-import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.util.*;
 import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.atomic.AtomicReference;
-import java.util.stream.Stream;
 
 /**
  * Handles Actions in Documents, such as Autocompletion, Change-Events and Syntax-Checks
  */
 public class JavaTXTextDocumentService implements org.eclipse.lsp4j.services.TextDocumentService {
 
+    private final FormattingHandler formattingHandler;
+    private final SaveHandler saveHandler;
+    private final ParserService parserService;
+    private final TypeResolver typeResolver;
+    private final de.dhbw.service.TextDocumentService textDocumentService;
+    private final LogService logService;
+    private final ClientService clientService;
+    private final CacheService cacheService;
+    private final ConversionHelper conversionHelper;
+    private final ChangeHandler changeHandler;
+    private final TextHelper textHelper;
+    private final CodeActionHandler codeActionHandler;
 
-    private static final Logger logger = LogManager.getLogger(JavaTXTextDocumentService.class);
     LanguageClient client;
     HashMap<String, String> textDocuments = new HashMap<>();
     CodeSnippetOptions codeSnippetOptions = new CodeSnippetOptions();
+    Boolean dontShowHints = false;
     Path fileRoot = null;
+    Boolean singleFileOpened = false;
+
+    public JavaTXTextDocumentService() {
+        this.textHelper = new TextHelper();
+        this.cacheService = new CacheService();
+        this.clientService = new ClientService(null);
+        this.typeResolver = new TypeResolver();
+        this.textDocumentService = new de.dhbw.service.TextDocumentService();
+        this.conversionHelper = new ConversionHelper(textHelper, textDocumentService);
+        this.logService = new LogService(clientService);
+        this.formattingHandler = new FormattingHandler(textDocumentService);
+        this.parserService = new ParserService(conversionHelper, clientService, cacheService);
+        this.codeActionHandler = new CodeActionHandler(textHelper, textDocumentService, cacheService, typeResolver, logService);
+        this.saveHandler = new SaveHandler(typeResolver, textDocumentService, logService, cacheService, conversionHelper, clientService, parserService);
+        this.changeHandler = new ChangeHandler(textDocumentService, parserService, conversionHelper, clientService, typeResolver, cacheService, logService);
+    }
 
     public void setClient(LanguageClient client) {
         this.client = client;
+        clientService.setClient(client);
     }
 
     public void setFileRoot(List<WorkspaceFolder> root) {
+
+        if (root == null) {
+            singleFileOpened = true;
+        }
+        //TODO: Nicht nur das erste Element nehmen sondern alle beachten
         fileRoot = Path.of(URI.create(root.get(0).getUri()));
     }
 
@@ -81,8 +107,18 @@ public class JavaTXTextDocumentService implements org.eclipse.lsp4j.services.Tex
      */
     @Override
     public void didOpen(DidOpenTextDocumentParams params) {
-        textDocuments.put(params.getTextDocument().getUri(), params.getTextDocument().getText());
+        cacheService.reset();
+        typeResolver.reset();
+        List<Diagnostic> syntaxErrors = parserService.getDiagnosticsOfErrors(params.getTextDocument().getText(), params.getTextDocument().getUri());
+        if (!syntaxErrors.isEmpty()) {
+            clientService.publishDiagnostics(params.getTextDocument().getUri(), syntaxErrors);
         }
+        client.refreshDiagnostics();
+        client.refreshInlayHints();
+        textDocuments.put(params.getTextDocument().getUri(), params.getTextDocument().getText());
+        textDocumentService.saveFileWithUri(params.getTextDocument().getUri(), params.getTextDocument().getText());
+    }
+
 
     /**
      * Handles didChange-Event.
@@ -92,35 +128,12 @@ public class JavaTXTextDocumentService implements org.eclipse.lsp4j.services.Tex
      */
     @Override
     public void didChange(DidChangeTextDocumentParams params) {
-        client.logMessage(new MessageParams(MessageType.Info,"[didChange] Client triggered didChange Event."));
-
-        AtomicReference<String> summedUp = new AtomicReference<>("");
-        params.getContentChanges().forEach(el -> summedUp.set(summedUp.get() + el.getText()));
-        textDocuments.put(params.getTextDocument().getUri(), summedUp.get());
-
-        String input = summedUp.get();
-
-        ParserInterface parserInterface = new ParserInterface();
-
-        List<ParserError> parserErrors = parserInterface.getParseErrors(input);
-
-        List<Diagnostic> diagnostics = parserErrors.stream().map(el -> {
-            Range errorRange = new Range(
-                    new Position(el.getLine() - 1, el.getCharPositionInLine()),        // Startposition
-                    new Position(el.getLine() - 1, el.getEndCharPosition())            // Endposition
-            );
-            return new Diagnostic(
-                    errorRange,
-                    el.getMsg(),
-                    DiagnosticSeverity.Error,
-                    "JavaTX Language Server"
-            );
-        }).toList();
-
-
-        PublishDiagnosticsParams diagnosticsParams = new PublishDiagnosticsParams(params.getTextDocument().getUri(), diagnostics);
-        client.publishDiagnostics(diagnosticsParams);
-
+        logService.log("[didChange] Client triggered didChange Event.", MessageType.Info);
+        cacheService.reset();
+        String fileInput = textDocumentService.getFileOfUri(params.getTextDocument().getUri());
+        textDocuments.put(params.getTextDocument().getUri(), fileInput);
+        textDocumentService.saveFileWithUri(params.getTextDocument().getUri(), fileInput);
+        changeHandler.didChange(params);
     }
 
     /**
@@ -130,7 +143,8 @@ public class JavaTXTextDocumentService implements org.eclipse.lsp4j.services.Tex
      */
     @Override
     public CompletableFuture<List<? extends TextEdit>> formatting(DocumentFormattingParams params) {
-        return CompletableFuture.completedFuture(Collections.emptyList());
+        logService.log("[formatting] Client requested formatting.", MessageType.Info);
+        return CompletableFuture.completedFuture(formattingHandler.handleFormat(params));
     }
 
     @Override
@@ -139,11 +153,18 @@ public class JavaTXTextDocumentService implements org.eclipse.lsp4j.services.Tex
 
     @Override
     public void didSave(DidSaveTextDocumentParams didSaveTextDocumentParams) {
+        logService.log("[didSave] Client triggered didSave-Event.");
+        clientService.startLoading("compile-task", "Inferring types...", client);
+        saveHandler.handleSave(didSaveTextDocumentParams);
+        clientService.stopLoading("compile-task", "Types successfully inferred", client);
+        clientService.updateClient(client);
     }
 
     @Override
     public CompletableFuture<List<InlayHint>> inlayHint(InlayHintParams params) {
-        return CompletableFuture.completedFuture(Collections.emptyList());}
+        logService.log("[inlayHint] The Client requested Inlay-Hints.", MessageType.Info);
+        return CompletableFuture.supplyAsync(() -> dontShowHints ? Collections.emptyList() : cacheService.getGlobalInlayHintMap().get(params.getTextDocument().getUri()) == null ? Collections.emptyList() : cacheService.getGlobalInlayHintMap().get(params.getTextDocument().getUri()));
+    }
 
     @Override
     public void willSave(WillSaveTextDocumentParams params) {
@@ -274,7 +295,14 @@ public class JavaTXTextDocumentService implements org.eclipse.lsp4j.services.Tex
 
     @Override
     public CompletableFuture<List<Either<Command, CodeAction>>> codeAction(CodeActionParams params) {
-        return CompletableFuture.completedFuture(Collections.emptyList());
+
+        logService.log("[codeAction] Client requested Insert at Line [" + params.getRange().getStart().getLine() + "] and from Char [" + params.getRange().getStart().getCharacter() + "] to [" + params.getRange().getEnd().getCharacter() + "].", MessageType.Info);
+
+        logService.log("Code-Action Context was: " + params.getContext().getTriggerKind().name(), MessageType.Info);
+
+        return CompletableFuture.supplyAsync(() -> {
+            return codeActionHandler.handleNewCodeAction(params);
+        });
     }
 
     @Override

LanguageServer/src/main/java/de/dhbw/JavaTXWorkspaceService.java

@@ -3,13 +3,8 @@ package de.dhbw;
 import org.apache.log4j.LogManager;
 import org.apache.log4j.Logger;
 import org.eclipse.lsp4j.*;
-import org.eclipse.lsp4j.jsonrpc.messages.Either;
 import org.eclipse.lsp4j.services.WorkspaceService;
 
-import java.util.Collections;
-import java.util.List;
-import java.util.concurrent.CompletableFuture;
-
 /**
  *
  * Handles Actions in Workspace

LanguageServer/src/main/java/de/dhbw/handler/ChangeHandler.java

@@ -0,0 +1,203 @@
+package de.dhbw.handler;
+
+import com.google.common.base.Stopwatch;
+import de.dhbw.helper.ConversionHelper;
+import de.dhbw.helper.TypeResolver;
+import de.dhbw.model.*;
+import de.dhbw.service.*;
+import de.dhbwstuttgart.syntaxtree.factory.NameGenerator;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.typeinference.result.PairTPHequalRefTypeOrWildcardType;
+import org.eclipse.lsp4j.*;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.stream.Collectors;
+
+public class ChangeHandler {
+
+    private final TextDocumentService textDocumentService;
+    private final ParserService parserService;
+    private final ConversionHelper conversionHelper;
+    private final ClientService clientService;
+    private final TypeResolver typeResolver;
+    private final CacheService cacheService;
+    private final LogService logService;
+
+    public ChangeHandler(TextDocumentService textDocumentService, ParserService parserService, ConversionHelper conversionHelper, ClientService clientService, TypeResolver typeResolver, CacheService cacheService, LogService logService) {
+        this.textDocumentService = textDocumentService;
+        this.parserService = parserService;
+        this.conversionHelper = conversionHelper;
+        this.clientService = clientService;
+        this.typeResolver = typeResolver;
+        this.cacheService = cacheService;
+        this.logService = logService;
+    }
+
+
+    public static String findAddedWord(String str1, String str2) {
+        int i = 0, j = 0;
+
+        // Suche den ersten Unterschied
+        while (i < str1.length() && j < str2.length() && str1.charAt(i) == str2.charAt(j)) {
+            i++;
+            j++;
+        }
+
+        // Falls alles gleich ist, gibt es nichts Neues
+        if (i == str1.length() && j == str2.length()) {
+            return null;
+        }
+
+        // Suche ab Ende rückwärts, um den gemeinsamen Suffix zu finden
+        int iEnd = str1.length() - 1;
+        int jEnd = str2.length() - 1;
+        while (iEnd >= i && jEnd >= j && str1.charAt(iEnd) == str2.charAt(jEnd)) {
+            iEnd--;
+            jEnd--;
+        }
+
+        // Der Unterschied liegt nun zwischen j und jEnd in str2
+        return str2.substring(j, jEnd + 1);
+    }
+
+
+    public void didChange(DidChangeTextDocumentParams params) {
+        String currentText = textDocumentService.getFileOfUri(params.getTextDocument().getUri());
+
+        AtomicReference<String> summedUp = new AtomicReference<>("");
+        params.getContentChanges().forEach(el -> summedUp.set(summedUp.get() + el.getText()));
+        textDocumentService.saveFileWithUri(params.getTextDocument().getUri(), summedUp.get());
+
+
+        List<Diagnostic> syntaxErrors = parserService.getDiagnosticsOfErrors(summedUp.get(), params.getTextDocument().getUri());
+
+        if (!syntaxErrors.isEmpty()) {
+            clientService.publishDiagnostics(params.getTextDocument().getUri(), syntaxErrors);
+        }
+        logService.log("Found [" + syntaxErrors.size() + "] Syntax Errors in Document.");
+
+        if (syntaxErrors.isEmpty()) {
+
+            String type = findAddedWord(currentText, summedUp.get());
+            String input = summedUp.get();
+
+            logService.log("Variables are: " + cacheService.getVariables().size());
+
+            boolean shouldCalculate = false;
+
+            logService.log("Type is here: " + type);
+            for (LSPVariable variable : cacheService.getVariables()) {
+                for (Type variableType : variable.getPossibleTypes()) {
+                    logService.log(variableType.getType() + " <> "+ type.replaceAll(" ", "") + ": " + type.replaceAll(" ", "").contains(variableType.getType().replaceAll(" ", "")));
+                    shouldCalculate = shouldCalculate || type.replaceAll(" ", "").contains(variableType.getType().replaceAll(" ", ""));
+                    if (shouldCalculate) {
+                        break;
+                    }
+                }
+            }
+
+            logService.log("Should Calculate is: " + shouldCalculate);
+
+            if (false) {
+                try {
+                    File tempDir = new File(System.getProperty("java.io.tmpdir"));
+                    File tempFile = File.createTempFile("newText", ".tmp", tempDir);
+                    FileWriter fileWriter = new FileWriter(tempFile, true);
+                    System.out.println(tempFile.getAbsolutePath());
+                    BufferedWriter bw = new BufferedWriter(fileWriter);
+                    bw.write(summedUp.get());
+                    bw.close();
+                    typeResolver.updateAst(tempFile.toURI().getPath());
+                    tempFile.delete();
+                } catch (Exception e) {
+                    logService.log(e.getMessage());
+                }
+
+                var sWatch = Stopwatch.createUnstarted();
+                sWatch.start();
+
+                try {
+                    ArrayList<LSPVariable> typesOfMethodAndParameters = typeResolver.infereChangeInput();
+                    DiagnosticsAndTypehints diagnosticsAndTypehints = conversionHelper.variablesToDiagnosticsAndTypehints(typesOfMethodAndParameters, params.getTextDocument().getUri());
+
+                    List<InlayHint> typeHint = diagnosticsAndTypehints.getInlayHints();
+                    List<Diagnostic> diagnostics = diagnosticsAndTypehints.getDiagnostics();
+
+                    cacheService.updateGlobalMaps(diagnostics, typeHint, params.getTextDocument().getUri());
+
+                } catch (Exception e) {
+                    logService.log("[didChange] Error trying to get Inlay-Hints and Diagnostics for Client: " + e.getMessage(), MessageType.Error);
+                    for (var stackTrace : e.getStackTrace()) {
+                        logService.log(stackTrace.toString());
+                    }
+
+                    clientService.showMessage(MessageType.Error, e.getMessage());
+                    cacheService.updateGlobalMaps(new ArrayList<>(), new ArrayList<>(), params.getTextDocument().getUri());
+
+                } finally {
+                    sWatch.stop();
+                    logService.log("[didChange] Finished Calculating in [" + sWatch.elapsed().toSeconds() + "s]", MessageType.Info);
+                }
+
+                List<Diagnostic> typeDiagnostics = cacheService.getGlobalDiagnosticsMap().get(params.getTextDocument().getUri());
+                ArrayList<Diagnostic> allDiagnostics = new ArrayList<>(typeDiagnostics);
+                clientService.publishDiagnostics(params.getTextDocument().getUri(), allDiagnostics);
+            } else {
+                logService.log("Calculating again.");
+                var sWatch = Stopwatch.createUnstarted();
+                sWatch.start();
+
+                try {
+                    try {
+                        File tempDir2 = new File(System.getProperty("java.io.tmpdir"));
+                        File tempFile2 = File.createTempFile("newText", ".tmp", tempDir2);
+                        FileWriter fileWriter = new FileWriter(tempFile2, true);
+                        BufferedWriter bw = new BufferedWriter(fileWriter);
+                        bw.write(input);
+                        bw.close();
+
+                        ArrayList<LSPVariable> variables = typeResolver.infereInput(tempFile2.toURI().toString(), input, false);
+                        cacheService.setVariables(variables);
+
+                        DiagnosticsAndTypehints diagnosticsAndTypehints = conversionHelper.variablesToDiagnosticsAndTypehintsWithInput(variables, input);
+
+                        List<InlayHint> typeHint = diagnosticsAndTypehints.getInlayHints();
+                        List<Diagnostic> diagnostics = diagnosticsAndTypehints.getDiagnostics();
+
+                        cacheService.updateGlobalMaps(diagnostics, typeHint, params.getTextDocument().getUri());
+
+                        List<Diagnostic> allDiagnostics = new ArrayList<>(diagnostics);
+                        allDiagnostics.addAll(parserService.getDiagnosticsOfErrors(input, params.getTextDocument().getUri()));
+
+                        clientService.publishDiagnostics(params.getTextDocument().getUri(), allDiagnostics);
+
+                        tempFile2.delete();
+                    } catch (Exception e) {
+                        logService.log("[didSave] Error trying to get Inlay-Hints and Diagnostics for Client: " + e.getMessage(), MessageType.Error);
+
+                        for (StackTraceElement elem : e.getStackTrace()) {
+                            logService.log(elem.toString());
+                        }
+                        clientService.showMessage(MessageType.Error, e.getMessage() == null ? "null" : e.getMessage());
+                        cacheService.updateGlobalMaps(new ArrayList<>(), new ArrayList<>(), params.getTextDocument().getUri());
+
+                    } finally {
+                        sWatch.stop();
+                        logService.log("[didSave] Finished Calculating in [" + sWatch.elapsed().toSeconds() + "s]", MessageType.Info);
+                    }
+
+                } catch (Exception e) {
+                    logService.log(e.getMessage());
+                }
+
+            }
+        }
+    }
+
+
+}

LanguageServer/src/main/java/de/dhbw/handler/CodeActionHandler.java

@@ -0,0 +1,217 @@
+package de.dhbw.handler;
+
+import de.dhbw.helper.TextHelper;
+import de.dhbw.helper.TypeResolver;
+import de.dhbw.service.CacheService;
+import de.dhbw.service.LogService;
+import de.dhbw.service.TextDocumentService;
+import de.dhbw.model.PlaceholderVariable;
+import org.eclipse.lsp4j.*;
+import org.eclipse.lsp4j.jsonrpc.messages.Either;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+public class CodeActionHandler {
+
+    private final TextHelper textHelper;
+    private final TextDocumentService textDocumentService;
+    private final CacheService cacheService;
+    private final TypeResolver typeResolver;
+    private final LogService logService;
+
+    public CodeActionHandler(TextHelper textHelper, TextDocumentService textDocumentService, CacheService cacheService, TypeResolver typeResolver, LogService logService) {
+        this.textHelper = textHelper;
+        this.textDocumentService = textDocumentService;
+        this.cacheService = cacheService;
+        this.typeResolver = typeResolver;
+        this.logService = logService;
+    }
+
+    public static Range wholeDocumentRange(String text) {
+        if (text == null || text.isEmpty()) {
+            return new Range(new Position(0, 0), new Position(0, 0));
+        }
+
+        int lastLine = 0;
+        int lastBreak = -1; // Index des letzten Zeilenumbruchszeichens, das zum Zeilenende gehört
+
+        final int n = text.length();
+        for (int i = 0; i < n; i++) {
+            char c = text.charAt(i);
+            if (c == '\n') {
+                lastLine++;
+                lastBreak = i;
+            } else if (c == '\r') {
+                // Unterscheide \r\n von alleine stehendem \r
+                if (i + 1 < n && text.charAt(i + 1) == '\n') {
+                    lastLine++;
+                    lastBreak = i + 1;
+                    i++; // \n überspringen
+                } else {
+                    lastLine++;
+                    lastBreak = i;
+                }
+            }
+        }
+
+        int lastLineStart = lastBreak + 1;
+        int endChar = n - lastLineStart; // Länge der letzten Zeile in UTF-16 Code Units
+
+        return new Range(new Position(0, 0), new Position(lastLine, endChar));
+    }
+
+
+    public static <V> Map<String, V> getOverlapping(
+            Map<String, V> map,
+            int line,
+            int startChar,
+            int endChar
+    ) {
+        if (startChar > endChar) {
+            int t = startChar;
+            startChar = endChar;
+            endChar = t;
+        }
+
+        final int s = startChar, e = endChar;
+
+        return map.entrySet().stream()
+                .filter(entry -> {
+                    String key = entry.getKey();
+                    String[] parts = key.split("\\s+");
+                    if (parts.length != 2) return false;
+                    try {
+                        int kLine = Integer.parseInt(parts[0]);
+                        int kChar = Integer.parseInt(parts[1]);
+                        return kLine == line && kChar >= s && kChar <= e;
+                    } catch (NumberFormatException ex) {
+                        // Key nicht im erwarteten Format
+                        return false;
+                    }
+                })
+                .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
+    }
+
+
+    public List<Either<Command, CodeAction>> handleNewCodeAction(CodeActionParams params) {
+
+        String documentUri = params.getTextDocument().getUri();
+        Range rangeOfInsert = params.getRange();
+
+        //All Diagnostics that are in range of the hover -> All Diagnostics of the selected Variable and thus all Types of the Variable
+        Map<String, List<PlaceholderVariable>> typeInsertsOverlapping = getOverlapping(typeResolver.getInserts(), rangeOfInsert.getStart().getLine()+1, rangeOfInsert.getStart().getCharacter(), rangeOfInsert.getEnd().getCharacter());
+        logService.log("Inserts are:");
+        typeResolver.getInserts().forEach((key, value) -> logService.log(key));
+        logService.log("Size is: " + typeInsertsOverlapping.size());
+        logService.log("Range is: " + rangeOfInsert.getStart().getLine() + " -> " + rangeOfInsert.getStart().getCharacter() + " - " + rangeOfInsert.getEnd().getCharacter());
+        List<Either<Command, CodeAction>> actions = new ArrayList<>();
+
+        for (var typeInsertList : typeInsertsOverlapping.values()) {
+            for (var typeInsert : typeInsertList) {
+                try {
+                    String typeWithReplacedVariable = typeInsert.insert(textDocumentService.getFileOfUri(documentUri));
+
+                    ArrayList<TextEdit> listOfChanges = new ArrayList<>();
+
+                    listOfChanges.add(new TextEdit(wholeDocumentRange(textDocumentService.getFileOfUri(documentUri)), typeWithReplacedVariable));
+
+                    var isTypeImported = false;
+
+                    Map<String, List<TextEdit>> changes = new HashMap<>();
+                    changes.put(documentUri, listOfChanges);
+
+                    WorkspaceEdit edit = new WorkspaceEdit();
+                    edit.setChanges(changes);
+
+                    CodeAction action = new CodeAction("Insert " + typeInsert.getInsertString());
+                    action.setKind(CodeActionKind.QuickFix);
+                    action.setEdit(edit);
+                    actions.add(Either.forRight(action));
+                } catch (Exception e) {
+                    logService.log("Error creating Actions, returning empty List. The Error was: " + e.getMessage(), MessageType.Error);
+                }
+            }
+        }
+        return actions;
+    }
+
+    public List<Either<Command, CodeAction>> handleCodeAction(CodeActionParams params) {
+
+        String documentUri = params.getTextDocument().getUri();
+
+
+        List<Diagnostic> diagnosticInCurrentDocument = params.getContext().getDiagnostics();
+        Range rangeOfInsert = params.getRange();
+
+        //All Diagnostics that are in range of the hover -> All Diagnostics of the selected Variable and thus all Types of the Variable
+        List<Diagnostic> diagnosticsOverlappingHover = diagnosticInCurrentDocument.stream()
+                .filter(diagnostic -> textDocumentService.rangesOverlap(diagnostic.getRange(), rangeOfInsert)).toList();
+
+
+        List<Either<Command, CodeAction>> actions = new ArrayList<>();
+
+        for (Diagnostic typeDiagnostic : diagnosticsOverlappingHover) {
+            try {
+                String typeWithReplacedVariable = typeDiagnostic.getMessage() +
+                        " " +
+                        textHelper.getTextOfChars(
+                                textDocumentService.getFileOfUri(documentUri),
+                                rangeOfInsert.getStart().getLine(),
+                                rangeOfInsert.getStart().getCharacter(),
+                                rangeOfInsert.getEnd().getCharacter()
+                        );
+
+                ArrayList<TextEdit> listOfChanges = new ArrayList<>();
+
+                if (typeDiagnostic.getCode().getLeft().equals("GENERIC")) {
+                    for (var diagnostic : cacheService.getGlobalDiagnosticsMap().get(documentUri)) {
+
+                        if (diagnostic.getCode().getLeft().equals("GENERIC")) {
+                            String genericType = diagnostic.getMessage() +
+                                    " " +
+                                    textHelper.getTextOfChars(
+                                            textDocumentService.getFileOfUri(params.getTextDocument().getUri()),
+                                            diagnostic.getRange().getStart().getLine(),
+                                            diagnostic.getRange().getStart().getCharacter(),
+                                            diagnostic.getRange().getEnd().getCharacter()
+                                    );
+                            listOfChanges.add(new TextEdit(diagnostic.getRange(), genericType));
+                        }
+                    }
+                } else {
+                    listOfChanges.add(new TextEdit(rangeOfInsert, typeWithReplacedVariable));
+                }
+
+                var isTypeImported = false;
+
+                if (!typeDiagnostic.getCode().getLeft().equalsIgnoreCase("generic")) {
+                    isTypeImported = typeResolver.isTypeImported(textDocumentService.getFileOfUri(params.getTextDocument().getUri()), typeDiagnostic.getMessage());
+                }
+                if (!isTypeImported && !typeDiagnostic.getMessage().equals("void") && !typeDiagnostic.getCode().getLeft().equals("GENERIC")) {
+                    Range importRange = new Range(new Position(0, 0), new Position(0, 0));
+
+                    var typeWithoutGenerics = typeDiagnostic.getMessage().contains("<") ? typeDiagnostic.getMessage().substring(0, typeDiagnostic.getMessage().indexOf('<')) : typeDiagnostic.getMessage();
+                    listOfChanges.add(new TextEdit(importRange, "import " + typeWithoutGenerics + ";\n"));
+                }
+
+                Map<String, List<TextEdit>> changes = new HashMap<>();
+                changes.put(documentUri, listOfChanges);
+
+                WorkspaceEdit edit = new WorkspaceEdit();
+                edit.setChanges(changes);
+
+                CodeAction action = new CodeAction("Insert " + typeDiagnostic.getMessage());
+                action.setKind(CodeActionKind.QuickFix);
+                action.setEdit(edit);
+                actions.add(Either.forRight(action));
+            } catch (Exception e) {
+                logService.log("Error creating Actions, returning empty List. The Error was: " + e.getMessage(), MessageType.Error);
+            }
+        }
+        return actions;
+    }
+}

LanguageServer/src/main/java/de/dhbw/handler/FormattingHandler.java

@@ -0,0 +1,38 @@
+package de.dhbw.handler;
+
+import de.dhbw.service.TextDocumentService;
+import org.eclipse.lsp4j.DocumentFormattingParams;
+import org.eclipse.lsp4j.Position;
+import org.eclipse.lsp4j.Range;
+import org.eclipse.lsp4j.TextEdit;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class FormattingHandler {
+
+    private final TextDocumentService textDocumentService;
+
+    public FormattingHandler(TextDocumentService textDocumentService) {
+        this.textDocumentService = textDocumentService;
+    }
+
+    public List<TextEdit> handleFormat(DocumentFormattingParams params){
+        List<TextEdit> edits = new ArrayList<>();
+
+
+        String[] lines = textDocumentService.getFileOfUri(params.getTextDocument().getUri()).split("\n");
+        StringBuilder formattedText = new StringBuilder();
+
+        for (String line : lines) {
+            formattedText.append(line.stripTrailing()).append("\n");
+        }
+
+        TextEdit edit = new TextEdit();
+        edit.setRange(new Range(new Position(0, 0), new Position(lines.length, 0)));
+        edit.setNewText(formattedText.toString().trim());
+
+        edits.add(edit);
+        return edits;
+    }
+}

LanguageServer/src/main/java/de/dhbw/handler/SaveHandler.java

@@ -0,0 +1,96 @@
+package de.dhbw.handler;
+
+import com.google.common.base.Stopwatch;
+import de.dhbw.model.DiagnosticsAndTypehints;
+import de.dhbw.service.*;
+import de.dhbw.helper.ConversionHelper;
+import de.dhbw.helper.TypeResolver;
+import de.dhbw.model.LSPVariable;
+import de.dhbwstuttgart.languageServerInterface.LanguageServerInterface;
+import de.dhbwstuttgart.languageServerInterface.model.ParserError;
+import org.eclipse.lsp4j.*;
+
+import java.net.URI;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+
+public class SaveHandler {
+
+    private final TypeResolver typeResolver;
+    private final TextDocumentService textDocumentService;
+    private final LogService logService;
+    private final CacheService cacheService;
+    private final ConversionHelper conversionHelper;
+    private final ClientService clientService;
+    private final ParserService parserService;
+
+    public SaveHandler(TypeResolver typeResolver, TextDocumentService textDocumentService, LogService logService, CacheService cacheService, ConversionHelper conversionHelper, ClientService clientService, ParserService parserService) {
+        this.typeResolver = typeResolver;
+        this.textDocumentService = textDocumentService;
+        this.logService = logService;
+        this.cacheService = cacheService;
+        this.conversionHelper = conversionHelper;
+        this.clientService = clientService;
+        this.parserService = parserService;
+    }
+
+    public void handleSave(DidSaveTextDocumentParams didSaveTextDocumentParams) {
+
+        cacheService.reset();
+        typeResolver.reset();
+        var sWatch = Stopwatch.createUnstarted();
+        sWatch.start();
+
+
+        try {
+
+            String fileInput = textDocumentService.getFileOfUri(didSaveTextDocumentParams.getTextDocument().getUri());
+
+            List<Diagnostic> syntaxErrors = parserService.getDiagnosticsOfErrors(fileInput, didSaveTextDocumentParams.getTextDocument().getUri());
+            if (!syntaxErrors.isEmpty()) {
+                clientService.publishDiagnostics(didSaveTextDocumentParams.getTextDocument().getUri(), syntaxErrors);
+            }
+            logService.log("Found [" + syntaxErrors.size() + "] Syntax Errors in Document.");
+
+            if (syntaxErrors.isEmpty()) {
+
+                cacheService.getLastSavedFiles().put(didSaveTextDocumentParams.getTextDocument().getUri(), fileInput);
+                //typeResolver.getCompilerInput(didSaveTextDocumentParams.getTextDocument().getUri(), fileInput);
+
+                if (fileInput == null) {
+                    logService.log("[didSave] Input of Text Document is null in TextDocument-Hashmap.", MessageType.Error);
+                }
+
+                ArrayList<LSPVariable> variables = typeResolver.infereInput(didSaveTextDocumentParams.getTextDocument().getUri(), fileInput, false);
+                cacheService.setVariables(variables);
+
+                DiagnosticsAndTypehints diagnosticsAndTypehints = conversionHelper.variablesToDiagnosticsAndTypehints(variables, didSaveTextDocumentParams.getTextDocument().getUri());
+
+                List<InlayHint> typeHint = diagnosticsAndTypehints.getInlayHints();
+                List<Diagnostic> diagnostics = diagnosticsAndTypehints.getDiagnostics();
+
+                cacheService.updateGlobalMaps(diagnostics, typeHint, didSaveTextDocumentParams.getTextDocument().getUri());
+
+                List<Diagnostic> allDiagnostics = new ArrayList<>(diagnostics);
+
+                clientService.publishDiagnostics(didSaveTextDocumentParams.getTextDocument().getUri(), allDiagnostics);
+
+            }
+
+        } catch (Exception e) {
+            logService.log("[didSave] Error trying to get Inlay-Hints and Diagnostics for Client: " + e.getMessage(), MessageType.Error);
+
+            for (StackTraceElement elem : e.getStackTrace()) {
+                logService.log(elem.toString());
+            }
+            clientService.showMessage(MessageType.Error, e.getMessage() == null ? "null" : e.getMessage());
+            cacheService.updateGlobalMaps(new ArrayList<>(), new ArrayList<>(), didSaveTextDocumentParams.getTextDocument().getUri());
+
+        } finally {
+            sWatch.stop();
+            logService.log("[didSave] Finished Calculating in [" + sWatch.elapsed().toSeconds() + "s]", MessageType.Info);
+        }
+    }
+}

LanguageServer/src/main/java/de/dhbw/helper/ASTTransformationHelper.java

@@ -0,0 +1,98 @@
+package de.dhbw.helper;
+
+import de.dhbw.model.PlaceholderPoint;
+import de.dhbw.model.PlaceholderType;
+import de.dhbw.model.PlaceholderVariable;
+import de.dhbwstuttgart.syntaxtree.ClassOrInterface;
+import de.dhbwstuttgart.syntaxtree.Method;
+import de.dhbwstuttgart.syntaxtree.SourceFile;
+import de.dhbwstuttgart.syntaxtree.type.*;
+import de.dhbwstuttgart.target.generate.GenerateGenerics;
+import de.dhbwstuttgart.target.generate.GenericsResult;
+import de.dhbwstuttgart.target.generate.GenericsResultSet;
+
+import de.dhbwstuttgart.typeinference.result.*;
+import org.antlr.v4.runtime.Token;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class ASTTransformationHelper {
+
+    public static Set<PlaceholderVariable> createTypeInsertPoints(SourceFile forSourcefile, ResultSet withResults, GenericsResult generics) {
+    	return new PlaceholderPlacer().getTypeInserts(forSourcefile, withResults, generics);
+    }
+
+    public static PlaceholderVariable createInsertPoints(RefTypeOrTPHOrWildcardOrGeneric type, Token offset, ClassOrInterface cl, Method m,
+														 ResultSet resultSet, GenericsResultSet constraints, GenericsResultSet classConstraints) {
+
+			ResolvedType resolvedType = resultSet.resolveType(type);
+			PlaceholderPoint insertPoint = new PlaceholderPoint(offset,
+					new PlaceholderToInsertString(resolvedType.resolvedType, constraints, classConstraints).insert, PlaceholderType.NORMAL_INSERT);
+			return new PlaceholderVariable(insertPoint, createGenericInsert(constraints, classConstraints, cl, m, resultSet, offset), resolvedType.getResultPair());
+    }
+
+    private static synchronized Set<PlaceholderPoint> createGenericInsert(GenericsResultSet methodConstraints, GenericsResultSet classConstraints, ClassOrInterface cl, Method m, ResultSet resultSet, Token mOffset){
+        Set<PlaceholderPoint> result = createGenericClassInserts(classConstraints, cl);
+    	
+    	if (m != null) {
+        	result.addAll(createMethodConstraints(methodConstraints, m.getOffset() != null ? m.getOffset() : mOffset));
+    	}
+        
+        return result;
+    }
+    
+    private static Set<PlaceholderPoint> createMethodConstraints(GenericsResultSet constraints, Token mOffset) {
+    	Set<PlaceholderPoint> result = new HashSet<>();
+    	Token offset = mOffset;
+
+		if (constraints.size() == 0) {
+			return result;
+		} 
+		
+		String insert = " <";
+
+        for (var genericInsertConstraint : constraints) {
+        	if (genericInsertConstraint instanceof GenerateGenerics.PairEQ peq) {
+        		insert += peq.left.resolve().getName();
+        	} else if (genericInsertConstraint instanceof GenerateGenerics.PairLT psm) {
+        		insert += psm.left.resolve().getName() + " extends " + psm.right.resolve().getName();
+        	}
+        	insert += ", ";
+        }
+        
+        insert = insert.substring(0, insert.length() -2);
+        insert += ">";
+
+        result.add(new PlaceholderPoint(offset, insert, PlaceholderType.GENERERIC_METHOD_INSERT));
+    	return result;
+    }
+
+	private static Set<PlaceholderPoint> createGenericClassInserts(GenericsResultSet classConstraints, ClassOrInterface cl) {
+		Set<PlaceholderPoint> result = new HashSet<>();
+		Token offset = cl.getGenerics().getOffset();
+
+		if (classConstraints == null || classConstraints.size() == 0) {
+			return result;
+		} 
+		
+		String insert = " <";
+
+        for (var genericInsertConstraint : classConstraints) {
+            if (genericInsertConstraint instanceof GenerateGenerics.PairEQ peq) {
+                insert += peq.left.resolve().getName();
+            } else if (genericInsertConstraint instanceof GenerateGenerics.PairLT psm) {
+                insert += psm.left.resolve().getName() + " extends " + psm.right.resolve().getName();
+            }
+            insert += ", ";
+        }
+
+        insert = insert.substring(0, insert.length() -2);
+        insert += ">";
+
+        result.add(new PlaceholderPoint(offset, insert, PlaceholderType.GENERIC_CLASS_INSERT));
+        
+        return result;
+	}
+}
+

LanguageServer/src/main/java/de/dhbw/helper/ConversionHelper.java

@@ -0,0 +1,123 @@
+package de.dhbw.helper;
+
+import de.dhbw.model.DiagnosticsAndTypehints;
+import de.dhbw.service.TextDocumentService;
+import de.dhbw.model.LSPVariable;
+import de.dhbw.model.Type;
+import de.dhbwstuttgart.languageServerInterface.model.ParserError;
+import org.eclipse.lsp4j.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ConversionHelper {
+
+    private final TextHelper textHelper;
+    private final TextDocumentService textDocumentService;
+
+    public ConversionHelper(TextHelper textHelper, TextDocumentService textDocumentService) {
+        this.textHelper = textHelper;
+        this.textDocumentService = textDocumentService;
+    }
+
+    public InlayHint getInlayHint(LSPVariable variable) {
+        InlayHint inlayHint = new InlayHint();
+
+        String typeDisplay = "";
+        for (Type type : variable.getPossibleTypes()) {
+            typeDisplay += " | " + type.getType().replaceAll("GTV ", "");
+        }
+
+
+        inlayHint.setLabel(typeDisplay.length() > 2 ? typeDisplay.substring(2) : typeDisplay);
+        inlayHint.setPosition(new Position(variable.getLine() - 1, variable.getCharPosition()));
+        inlayHint.setKind(InlayHintKind.Parameter);
+        inlayHint.setPaddingRight(true);
+        inlayHint.setPaddingRight(true);
+        return inlayHint;
+    }
+
+    public Diagnostic getDiagnostic(LSPVariable variable, String fileUri, Type type) {
+        Range errorRange = new Range(
+                new Position(variable.getLine() - 1, variable.getCharPosition()),               // Startposition
+                new Position(variable.getLine() - 1, textHelper.getEndingCharOfStartingChar(variable.getLine() - 1, variable.getCharPosition(), textDocumentService.getFileOfUri(fileUri)))    // Endposition
+        );
+        Diagnostic diagnostic = new Diagnostic(
+                errorRange,
+                //TODO: REMOVE! Temporary Fix because GTV, like TPH can be thrown away in the TypeResolver
+                type.getType().replaceAll("GTV ", ""),
+                DiagnosticSeverity.Hint,
+                "JavaTX Language Server"
+        );
+        diagnostic.setCode(type.isGeneric() ? "GENERIC" : "TYPE");
+
+        return diagnostic;
+    }
+
+    public Diagnostic getDiagnosticWithInput(LSPVariable variable, String input, Type type) {
+        Range errorRange = new Range(
+                new Position(variable.getLine() - 1, variable.getCharPosition()),               // Startposition
+                new Position(variable.getLine() - 1, textHelper.getEndingCharOfStartingChar(variable.getLine() - 1, variable.getCharPosition(), input))    // Endposition
+        );
+        Diagnostic diagnostic = new Diagnostic(
+                errorRange,
+                //TODO: REMOVE! Temporary Fix because GTV, like TPH can be thrown away in the TypeResolver
+                type.getType().replaceAll("GTV ", ""),
+                DiagnosticSeverity.Hint,
+                "JavaTX Language Server"
+        );
+        diagnostic.setCode(type.isGeneric() ? "GENERIC" : "TYPE");
+
+        return diagnostic;
+    }
+
+    public List<Diagnostic> parseErrorToDiagnostic(List<ParserError> parserErrors){
+        return parserErrors.stream().map(el -> {
+            Range errorRange = new Range(
+                    new Position(el.getLine() - 1, el.getCharPositionInLine()),        // Startposition
+                    new Position(el.getLine() - 1, el.getEndCharPosition())            // Endposition
+            );
+            return new Diagnostic(
+                    errorRange,
+                    el.getMsg(),
+                    DiagnosticSeverity.Error,
+                    "JavaTX Language Server"
+            );
+        }).toList();
+    }
+
+    public DiagnosticsAndTypehints variablesToDiagnosticsAndTypehints(ArrayList<LSPVariable> typesOfMethodAndParameters, String uri){
+        List<InlayHint> typeHint = new ArrayList<>();
+        ArrayList<Diagnostic> diagnostics = new ArrayList<>();
+
+        for (var variable : typesOfMethodAndParameters) {
+
+            InlayHint inlayHint = getInlayHint(variable);
+            typeHint.add(inlayHint);
+
+            for (var type : variable.getPossibleTypes()) {
+                Diagnostic diagnostic = getDiagnostic(variable, uri, type);
+                diagnostics.add(diagnostic);
+            }
+        }
+
+        return new DiagnosticsAndTypehints(diagnostics, typeHint);
+    }
+    public DiagnosticsAndTypehints variablesToDiagnosticsAndTypehintsWithInput(ArrayList<LSPVariable> typesOfMethodAndParameters, String input){
+        List<InlayHint> typeHint = new ArrayList<>();
+        ArrayList<Diagnostic> diagnostics = new ArrayList<>();
+
+        for (var variable : typesOfMethodAndParameters) {
+
+            InlayHint inlayHint = getInlayHint(variable);
+            typeHint.add(inlayHint);
+
+            for (var type : variable.getPossibleTypes()) {
+                Diagnostic diagnostic = getDiagnosticWithInput(variable, input, type);
+                diagnostics.add(diagnostic);
+            }
+        }
+
+        return new DiagnosticsAndTypehints(diagnostics, typeHint);
+    }
+}

LanguageServer/src/main/java/de/dhbw/helper/DuplicationUtils.java

@@ -0,0 +1,34 @@
+package de.dhbw.helper;
+
+import de.dhbw.model.Type;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+public class DuplicationUtils {
+    public ArrayList<Type> filterOutDuplicates(List<Type> typeListOne, List<Type> typeListTwo) {
+
+        ArrayList<Type> filteredArrayList = new ArrayList<>();
+
+        typeListOne.forEach(el -> {
+            boolean found = false;
+            for (Type typeInListTwo : typeListTwo) {
+                found = found || typeInListTwo.getType().equals(el.getType());
+            }
+            if (!found) {
+                filteredArrayList.add(el);
+            }
+        });
+
+        return filteredArrayList;
+    }
+
+    public ArrayList<Type> filterOutDuplicates(List<Type> typeListOne) {
+        HashMap<String, Type> hashMap = new HashMap<>();
+        typeListOne.forEach(el -> {
+            hashMap.put(el.getType(), el);
+        });
+        return new ArrayList<>(hashMap.values());
+    }
+}

LanguageServer/src/main/java/de/dhbw/helper/PlaceholderPlacer.java

@@ -0,0 +1,31 @@
+package de.dhbw.helper;
+
+import de.dhbw.model.PlaceholderVariable;
+import de.dhbwstuttgart.syntaxtree.*;
+import de.dhbwstuttgart.target.generate.GenericsResult;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class PlaceholderPlacer extends AbstractASTWalker {
+    Set<PlaceholderVariable> inserts = new HashSet<>();
+    private ResultSet withResults;
+    String pkgName;
+    private GenericsResult genericsResult;
+
+    public Set<PlaceholderVariable> getTypeInserts(SourceFile forSourceFile, ResultSet withResults, GenericsResult genericsResult){
+        this.withResults = withResults;
+        this.genericsResult = genericsResult;
+        pkgName = forSourceFile.getPkgName();
+        forSourceFile.accept(this);
+        return inserts;
+    }
+
+    @Override
+    public void visit(ClassOrInterface classOrInterface) {
+        de.dhbw.helper.PlaceholderPlacerClass cl = new de.dhbw.helper.PlaceholderPlacerClass(classOrInterface, withResults, genericsResult);
+        this.inserts.addAll(cl.inserts);
+    }
+}
+

LanguageServer/src/main/java/de/dhbw/helper/PlaceholderPlacerClass.java

@@ -0,0 +1,65 @@
+package de.dhbw.helper;
+
+import de.dhbw.model.PlaceholderVariable;
+import de.dhbwstuttgart.syntaxtree.*;
+import de.dhbwstuttgart.syntaxtree.statement.LambdaExpression;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.target.generate.GenericsResult;
+import de.dhbwstuttgart.target.generate.GenericsResultSet;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+
+import java.util.HashSet;
+import java.util.Set;
+
+class PlaceholderPlacerClass extends AbstractASTWalker{
+    protected final ResultSet results;
+    private GenericsResult generatedGenerics;
+    protected final ClassOrInterface cl;
+    public final Set<PlaceholderVariable> inserts = new HashSet<>();
+    private Method method;
+
+    GenericsResultSet constraints;
+	GenericsResultSet classConstraints;
+
+    PlaceholderPlacerClass(ClassOrInterface forClass, ResultSet withResults, GenericsResult generatedGenerics){
+        this.cl = forClass;
+        this.method = null;
+        this.results = withResults;
+        this.generatedGenerics = generatedGenerics;
+        forClass.accept(this);
+    }
+
+    @Override
+    public void visit(Method method) {
+        this.method = method;
+        constraints = generatedGenerics.get(method);
+		classConstraints = generatedGenerics.get(cl);
+        if(method.getReturnType() instanceof TypePlaceholder)
+            inserts.add(ASTTransformationHelper.createInsertPoints(
+                    method.getReturnType(), method.getReturnType().getOffset(), cl, method, results, constraints, classConstraints));
+        super.visit(method);
+    }
+
+    @Override
+    public void visit(Field field) {
+        if(field.getType() instanceof TypePlaceholder){
+        	classConstraints = generatedGenerics.get(cl);
+                inserts.add(ASTTransformationHelper.createInsertPoints(
+                        field.getType(), field.getType().getOffset(), cl, method, results, null, classConstraints));
+        }
+        super.visit(field);
+    }
+
+    @Override
+    public void visit(FormalParameter param) {
+            if(param.getType() instanceof TypePlaceholder)
+                inserts.add(ASTTransformationHelper.createInsertPoints(
+                        param.getType(), param.getType().getOffset(), cl, method, results, constraints, classConstraints));
+        super.visit(param);
+    }
+
+    @Override
+    public void visit(LambdaExpression lambdaExpression) {
+        //Lambda-Ausdrücke brauchen keine Typeinsetzungen
+    }
+}

LanguageServer/src/main/java/de/dhbw/helper/PlaceholderToInsertString.java

@@ -0,0 +1,77 @@
+package de.dhbw.helper;
+
+import de.dhbwstuttgart.syntaxtree.type.*;
+import de.dhbwstuttgart.target.generate.GenericsResultSet;
+import de.dhbwstuttgart.typeinference.result.*;
+
+import java.util.Iterator;
+
+public class PlaceholderToInsertString implements ResultSetVisitor{
+    public String insert = "";
+    private GenericsResultSet constraints;
+    private GenericsResultSet classConstraints;
+    
+
+    public PlaceholderToInsertString(RefTypeOrTPHOrWildcardOrGeneric type, GenericsResultSet constraints, GenericsResultSet classConstraints){
+        this.constraints = constraints;
+        this.classConstraints = classConstraints;
+    	type.accept(this);
+    }
+
+    @Override
+    public void visit(PairTPHsmallerTPH p) {
+
+    }
+
+    @Override
+    public void visit(PairTPHequalRefTypeOrWildcardType p) {
+
+    }
+
+    @Override
+    public void visit(PairTPHEqualTPH p) {
+
+    }
+
+    @Override
+    public void visit(RefType resolved) {
+        insert = resolved.getName().toString();
+        if(resolved.getParaList().size() > 0){
+            insert += "<";
+            Iterator<RefTypeOrTPHOrWildcardOrGeneric> iterator = resolved.getParaList().iterator();
+            while(iterator.hasNext()){
+                RefTypeOrTPHOrWildcardOrGeneric typeParam = iterator.next();
+                insert += new PlaceholderToInsertString(typeParam, constraints, classConstraints).insert;
+                if(iterator.hasNext())insert += ", ";
+            }
+            insert += ">";
+        }
+    }
+
+    @Override
+    public void visit(GenericRefType genericRefType) {
+        insert += genericRefType.getParsedName();
+    }
+
+    @Override
+    public void visit(SuperWildcardType superWildcardType) {
+        insert += "? super " + new PlaceholderToInsertString(superWildcardType.getInnerType(), constraints, classConstraints).insert;
+    }
+
+    @Override
+    public void visit(TypePlaceholder typePlaceholder) {
+        ResultPair<?, ?> resultPair = null;
+        if (constraints != null)
+            resultPair = constraints.getResultPairFor(typePlaceholder).orElse(null);
+        if (resultPair == null)
+            resultPair = classConstraints.getResultPairFor(typePlaceholder).orElse(null);
+
+        if (resultPair != null)
+            insert += ((TypePlaceholder)resultPair.getLeft()).getName();
+    }
+
+    @Override
+    public void visit(ExtendsWildcardType extendsWildcardType) {
+        insert += "? extends " + new PlaceholderToInsertString(extendsWildcardType.getInnerType(), constraints, classConstraints).insert;
+    }
+}

LanguageServer/src/main/java/de/dhbw/helper/TextHelper.java

@@ -2,8 +2,6 @@ package de.dhbw.helper;
 
 import org.apache.log4j.Logger;
 
-import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 
 public class TextHelper {
@@ -59,7 +57,7 @@ public class TextHelper {
 
         if(lines.length < line){
             log.warn("Returning hardcoded Value because the requested Line [" + line + "] does not exist in Text Document.");
-            return startChar+3;
+            return startChar;
         }
 
         String[] linesInChar = lines[line].split("");

LanguageServer/src/main/java/de/dhbw/helper/TypeResolver.java

@@ -2,66 +2,66 @@ package de.dhbw.helper;
 
 
 import de.dhbw.model.*;
+import de.dhbw.model.PlaceholderVariable;
+import de.dhbwstuttgart.core.JavaTXCompiler;
 import de.dhbwstuttgart.languageServerInterface.LanguageServerInterface;
 import de.dhbwstuttgart.languageServerInterface.model.LanguageServerTransferObject;
-import de.dhbwstuttgart.syntaxtree.ClassOrInterface;
-import de.dhbwstuttgart.syntaxtree.Method;
+import de.dhbwstuttgart.parser.scope.JavaClassName;
 import de.dhbwstuttgart.syntaxtree.SourceFile;
-import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.factory.NameGenerator;
+import de.dhbwstuttgart.syntaxtree.visual.ASTPrinter;
 import de.dhbwstuttgart.target.generate.GenericsResult;
+import de.dhbwstuttgart.typedeployment.TypeInsert;
 import de.dhbwstuttgart.typeinference.result.ResultSet;
 import org.apache.log4j.LogManager;
 import org.apache.log4j.Logger;
 
+import java.io.File;
 import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.net.URI;
 import java.net.URISyntaxException;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.*;
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.stream.Collectors;
 
 
 /**
  * Helper-Class for finding the Type of a selected Word
  */
 public class TypeResolver {
-
-    HashMap<Integer, LanguageServerTransferObject> dataCache = new HashMap<>();
-
     private static final Logger logger = LogManager.getLogger(TypeResolver.class);
 
+    private final TypeUtils typeUtils;
+    private final DuplicationUtils duplicationUtils;
+    private final boolean ENABLE_GENERICS = true;
+    private List<GenericsResult> generatedGenerics = null;
+    private HashMap<String, List<PlaceholderVariable>> inserts;
 
-    private List<ResultSet> currentResults = new ArrayList<>();
 
-    public List<ResultSet> getCurrentResults() {
-        return currentResults;
+    public HashMap<String, List<PlaceholderVariable>> getInserts() {
+        return inserts;
     }
 
-    public void setCurrentResults(List<ResultSet> currentResults) {
-        this.currentResults = currentResults;
+    //Somehow you have to reset to the Letter N to keep the naming of the TPHs consistent
+    private final String RESET_TO_LETTER = "A";
+
+    private LanguageServerTransferObject current;
+
+    public void reset() {
+        HashMap<String, List<TypeInsert>> inserts = null;
+        List<GenericsResult> generatedGenerics = null;
+        current = null;
     }
 
-    public void addToCurrentResults(List<ResultSet> additionalResults) {
-        this.currentResults.addAll(additionalResults);
-    }
 
     public TypeResolver() {
+        this.typeUtils = new TypeUtils();
+        this.duplicationUtils = new DuplicationUtils();
     }
 
 
-    private LanguageServerTransferObject getCacheOrCalculate(String input, String path) throws IOException, ClassNotFoundException, URISyntaxException {
-        logger.info("Trying to find cached Compiler-Answer for input with key [" + input.hashCode() + "].");
-        LanguageServerInterface languageServer = new LanguageServerInterface();
-        if (dataCache.containsKey(input.hashCode())) {
-            logger.info("Found Cache for the Input with key [" + input.hashCode() + "].");
-            return dataCache.get(input.hashCode());
-        } else {
-            logger.info("Could not find Cache for Input with key [" + input.hashCode() + "]. Using Compiler Interface and Saving the Answer in Cache.");
-            var transferObject = languageServer.getResultSetAndAbstractSyntax(path, input);
-            dataCache.put(input.hashCode(), transferObject);
-            return transferObject;
-        }
-    }
-
     public boolean isTypeImported(String input, String type) {
 //        try {
 //            var transferObject = getCacheOrCalculate(input);
@@ -80,176 +80,181 @@ public class TypeResolver {
         return true;
     }
 
-    public ArrayList<Type> getAvailableTypes(List<ResultSet> resultSets, Method method) {
-        logger.info("Searching for resulting Types of Placeholder [" + method.getReturnType().toString() + "].");
-        ArrayList<String> normalType = new ArrayList<>();
-
-        resultSets.forEach(conSet -> {
-            if (method.getReturnType().toString().toLowerCase().contains("tph ")) {
-                normalType.add(conSet.resolveType(method.getReturnType()).resolvedType.toString());
-            }
-        });
-
-
-        return new ArrayList<>(normalType.stream().filter(el -> !el.contains("TPH ")).map(el -> new Type(el, false)).toList());
-
-    }
-
-    public ArrayList<Type> getAvailableGenericTypes(List<GenericsResult> genericsResult, Method method) {
-        logger.info("Searching for resulting Types of Placeholder [" + method.getReturnType().toString() + "].");
-        ArrayList<String> genericTypes = new ArrayList<>();
-
-        genericsResult.forEach(conSet -> {
-            if (method.getReturnType().toString().toLowerCase().contains("tph ")) {
-                genericTypes.add(conSet.resolveTarget(method.getReturnType()).name().replaceAll("GTV ", ""));
-            }
-        });
-
-
-        return new ArrayList<>(genericTypes.stream().filter(el -> !el.contains("TPH ")).map(el -> new Type(el, true)).toList());
-
-    }
-
-    public ArrayList<Type> getAvailableGenericTypes(List<GenericsResult> genericsResult, RefTypeOrTPHOrWildcardOrGeneric parameter) {
-        logger.info("Searching for resulting Types of Placeholder [" + parameter.toString() + "].");
-
-        ArrayList<String> paramTypes = new ArrayList<>();
-        genericsResult.forEach(conSet -> {
-            if (parameter.toString().toLowerCase().contains("tph ")) {
-                paramTypes.add(conSet.resolveTarget(parameter).name());
-            }
-        });
-
-        return new ArrayList<>(paramTypes.stream().filter(el -> !el.contains("TPH ")).map(el -> new Type(el, true)).toList());
-
-    }
-
-    public ArrayList<Type> getAvailableTypes(List<ResultSet> resultSets, RefTypeOrTPHOrWildcardOrGeneric parameter) {
-        logger.info("Searching for resulting Types of Placeholder [" + parameter.toString() + "].");
-
-        ArrayList<String> paramTypes = new ArrayList<>();
-        resultSets.forEach(conSet -> {
-            if (parameter.toString().toLowerCase().contains("tph ")) {
-                paramTypes.add(conSet.resolveType(parameter).resolvedType.toString());
-            }
-        });
-
-        return new ArrayList<>(paramTypes.stream().filter(el -> !el.contains("TPH ")).map(el -> new Type(el, false)).toList());
-    }
-
-    public ArrayList<Type> filterOutDuplicates(List<Type> typeListOne, List<Type> typeListTwo) {
-
-        ArrayList<Type> filteredArrayList = new ArrayList<>();
-
-        typeListOne.forEach(el -> {
-            boolean found = false;
-            for (Type typeInListTwo : typeListTwo) {
-                found = found || typeInListTwo.getType().equals(el.getType());
-            }
-            if (!found) {
-                filteredArrayList.add(el);
-            }
-        });
-
-        return filteredArrayList;
-    }
-
-    public ArrayList<Type> filterOutDuplicates(List<Type> typeListOne) {
-        HashMap<String, Type> hashMap = new HashMap<>();
-        typeListOne.forEach(el -> {
-            hashMap.put(el.getType(), el);
-        });
-        return new ArrayList<>(hashMap.values());
-    }
-
-    public ArrayList<Type> getClassGenerics(Map<SourceFile, List<GenericsResult>> genericsResult, Method method, ClassOrInterface clazz) {
-        ArrayList<Type> genericTypes = new ArrayList<>();
-
-        genericsResult.forEach(((key, value) -> value.forEach(genericResultSet -> {
-
-            var result = genericResultSet.resolveTarget(method.getReturnType());
-
-
-            var genericResult = genericResultSet.getBounds(method.getReturnType(), clazz, method);
-            if (result != null && genericResult != null) {
-                genericResult.forEach(res -> {
-                            if (res != null && !res.isOnMethod()) {
-                                genericTypes.add(new Type("<" + result.name() + (res.bound().toString().equals("java.lang.Object") ? ">" : " extends " + res.bound().toString() + ">"), true));
-
-                            }
-                        }
-                );
-            }
-
-        })));
-
-        return genericTypes;
-    }
-
-    /**
-     * Zum Erhalt für sowohl Parameter als auch Methoden.
-     */
-    public ArrayList<LSPVariable> infereInput(String input, String path) throws IOException, ClassNotFoundException, URISyntaxException {
-        logger.info("Infering Types for Input.");
-
+    public void getCompilerInput(String path, String input) throws IOException, URISyntaxException, ClassNotFoundException {
         LanguageServerInterface languageServer = new LanguageServerInterface();
-        var transferObj = languageServer.getResultSetAndAbstractSyntax(path, input);
-        ArrayList<LSPVariable> methodsWithParametersLSPVariableList = new ArrayList<>();
-
-
-        //TODO: Hier noch irgendwie die Klasse rausfinden oder durchgehen.
-        //GENERICS OF CLASS
-        for (var method : transferObj.getAst().getAllMethods()) {
-
-
-            for (var clazz : transferObj.getAst().getClasses()) {
-                ArrayList<Type> genericTypes = getClassGenerics(transferObj.getGeneratedGenerics(), method, clazz);
-                TextHelper helper = new TextHelper();
-                if (!genericTypes.isEmpty()) {
-                    methodsWithParametersLSPVariableList.add(new LSPClass("test", genericTypes, clazz.getOffset().getLine(), helper.getClassPositionForGeneric(clazz.getOffset().getLine() - 1, input, clazz.getOffset().getStopIndex()), clazz.getOffset().getStopIndex()));
+        var transferObj = languageServer.getResultSetAndAbastractSyntax(path, RESET_TO_LETTER);
+        current = transferObj;
     }
+
+    public LanguageServerTransferObject updateIfNotPresent(String path, String input) throws IOException, URISyntaxException, ClassNotFoundException {
+        if (current == null) {
+            LanguageServerInterface languageServer = new LanguageServerInterface();
+            LanguageServerTransferObject transferObj = languageServer.getResultSetAndAbstractSyntax(path);
+            return transferObj;
+        }
+        return current;
+    }
+
+    public ArrayList<LSPVariable> infereChangeInput() throws IOException, ClassNotFoundException, URISyntaxException {
+
+        Set<PlaceholderVariable> tips = new HashSet<>();
+
+        for (int i = 0; i < current.getResultSets().size(); i++) {
+            ResultSet tiResult = current.getResultSets().get(i);
+            tips.addAll(ASTTransformationHelper.createTypeInsertPoints(current.getAst(), tiResult, generatedGenerics.get(i)));
+
+        }
+
+        HashMap<String, List<PlaceholderVariable>> insertsOnLines = new HashMap<>();
+
+        for (PlaceholderVariable insert : tips) {
+            if (!insertsOnLines.containsKey(insert.point.point.getLine() + " " + insert.point.point.getCharPositionInLine())) {
+                insertsOnLines.put(insert.point.point.getLine() + " " + insert.point.point.getCharPositionInLine(), new ArrayList<>(List.of(insert)));
+            } else {
+                insertsOnLines.get(insert.point.point.getLine() + " " + insert.point.point.getCharPositionInLine()).add(insert);
+            }
+        }
+
+        inserts = insertsOnLines;
+
+        ArrayList<LSPVariable> variables = new ArrayList<>(insertsOnLines.entrySet().stream().map(el -> new LSPVariable("test", new ArrayList<>(el.getValue().stream().map(typeinsert -> new Type(typeinsert.getInsertString(), typeinsert.point.isGenericClassInsertPoint())).toList()), el.getValue().getFirst().point.point.getLine(), el.getValue().getFirst().point.point.getCharPositionInLine(), el.getValue().get(0).point.point.getStopIndex(), el.getValue().get(0).getResultPair().getLeft())).toList());
+
+
+        for (var variable : variables) {
+
+            HashMap<String, Type> uniqueType = new HashMap<>();
+
+            for (var type : variable.getPossibleTypes()) {
+                if (!uniqueType.containsKey(type.getType().replaceAll(" ", ""))) {
+                    uniqueType.put(type.getType(), type);
+                }
+            }
+            variable.setPossibleTypes(new ArrayList<>(uniqueType.values()));
+            logger.info(variable.getLine() + ":" + variable.getCharPosition());
+            for (Type t : variable.getPossibleTypes()) {
+                logger.info(t.getType());
             }
 
         }
 
-        for (var method : transferObj.getAst().getAllMethods()) {
-            var types = getAvailableTypes(transferObj.getResultSets(), method);
-            var generics = getAvailableGenericTypes(transferObj.getGeneratedGenerics().values().stream().flatMap(List::stream).collect(Collectors.toList()), method);
-
-            if (!filterOutDuplicates(types).isEmpty()) {
-                methodsWithParametersLSPVariableList.add(new LSPMethod(method.name, filterOutDuplicates(types), method.getOffset().getLine(), method.getOffset().getCharPositionInLine(), method.getOffset().getStopIndex()));
+        return variables;
     }
-            if (!generics.isEmpty()) {
-                ArrayList<Type> typesThatAreGeneric = filterOutDuplicates(generics, types);
-                typesThatAreGeneric.forEach(el -> el.setType("<" + el.getType() + "> " + el.getType()));
-                //TODO: Muss Global und wird mehrmals so gemacht. Das if hier ist eigentlich falsch wegen unnötiger Berechnungszeit
-                if (!filterOutDuplicates(typesThatAreGeneric).isEmpty()) {
-                    methodsWithParametersLSPVariableList.add(new LSPMethod(method.name, filterOutDuplicates(typesThatAreGeneric), method.getOffset().getLine(), method.getOffset().getCharPositionInLine(), method.getOffset().getStopIndex()));
+
+    public ArrayList<LSPVariable> infereInput(String pathString, String input, boolean a) throws IOException, ClassNotFoundException, URISyntaxException {
+        System.setOut(new PrintStream(OutputStream.nullOutputStream()));
+
+        var uri = new URI(pathString);
+        var path = Path.of(uri);
+
+        logger.info("Path is for calculation: " + path.toString());
+        var file = path.toFile();
+        Files.createDirectories(path.getParent().resolve("out"));
+        var compiler = new JavaTXCompiler(List.of(file), List.of(path.getParent().toFile()), path.getParent().resolve("out").toFile());
+
+        var parsedSource = compiler.sourceFiles.get(file);
+        var tiResults = compiler.typeInference(file);
+        Set<PlaceholderVariable> tips = new HashSet<>();
+
+//        for (var sf : compiler.sourceFiles.values()) {
+//            Map<JavaClassName, byte[]> bytecode = compiler.generateBytecode(sf, tiResults);
+//            logger.info("Path for Class-File is: " + path.getParent().resolve("out").toFile());
+//            Files.createDirectories(path.getParent().resolve("out"));
+//            compiler.writeClassFile(bytecode, path.getParent().resolve("out").toFile(), false);
+//
+//        }
+
+        Map<JavaClassName, byte[]> bytecode = compiler.generateBytecode(parsedSource, tiResults);
+        logger.info("Path for Class-File is: " + path.getParent().resolve("out").toFile());
+        Files.createDirectories(path.getParent().resolve("out"));
+        compiler.writeClassFile(bytecode, path.getParent().resolve("out").toFile(), false);
+
+        generatedGenerics = compiler.getGeneratedGenerics().get(compiler.sourceFiles.get(file));
+        for (int i = 0; i < tiResults.size(); i++) {
+            ResultSet tiResult = tiResults.get(i);
+            tips.addAll(ASTTransformationHelper.createTypeInsertPoints(parsedSource, tiResult, compiler.getGeneratedGenerics().get(compiler.sourceFiles.get(file)).get(i)));
+        }
+        System.setOut(System.out);
+        this.current = new LanguageServerTransferObject(tiResults, parsedSource, "", compiler.getGeneratedGenerics());
+
+        HashMap<String, List<PlaceholderVariable>> insertsOnLines = new HashMap<>();
+
+        for (PlaceholderVariable insert : tips) {
+            if (!insertsOnLines.containsKey(insert.point.point.getLine() + " " + insert.point.point.getCharPositionInLine())) {
+                insertsOnLines.put(insert.point.point.getLine() + " " + insert.point.point.getCharPositionInLine(), new ArrayList<>(List.of(insert)));
+            } else {
+                insertsOnLines.get(insert.point.point.getLine() + " " + insert.point.point.getCharPositionInLine()).add(insert);
             }
         }
 
-            for (var param : method.getParameterList()) {
-                ArrayList<Type> typeParam = getAvailableTypes(transferObj.getResultSets(), param.getType());
-                ArrayList<Type> genericParam = getAvailableGenericTypes(transferObj.getGeneratedGenerics().values().stream().flatMap(List::stream).collect(Collectors.toList()), param.getType());
+        inserts = insertsOnLines;
 
-                if (!typeParam.isEmpty()) {
-                    methodsWithParametersLSPVariableList.add(new LSPParameter(method.name, filterOutDuplicates(typeParam), param.getOffset().getLine(), param.getOffset().getCharPositionInLine(), param.getOffset().getStopIndex()));
+        logger.info("TYPES ARE:");
+        insertsOnLines.forEach((key, value) -> value.forEach(type -> logger.info(type.point.getInsertString())));
+        ArrayList<LSPVariable> variables = new ArrayList<>();
+
+
+        for(var entrySet : insertsOnLines.entrySet()){
+            ArrayList<Type> typesOfVariable  = new ArrayList<>();
+
+            for(PlaceholderVariable typeinsert : entrySet.getValue()){
+                typesOfVariable.add(new Type(typeinsert.getInsertString(), typeinsert.point.isGenericClassInsertPoint()));
             }
 
-                if (!genericParam.isEmpty()) {
-                    ArrayList<Type> typesThatAreGeneric = filterOutDuplicates(genericParam, typeParam);
+            variables.add(new LSPVariable("test",typesOfVariable , entrySet.getValue().getFirst().point.point.getLine(), entrySet.getValue().getFirst().point.point.getCharPositionInLine(), entrySet.getValue().get(0).point.point.getStopIndex(), entrySet.getValue().get(0).getResultPair().getLeft()));
+        }
 
 
-                    if (!filterOutDuplicates(typesThatAreGeneric).isEmpty()) {
-                        methodsWithParametersLSPVariableList.add(new LSPParameter(method.name, filterOutDuplicates(typesThatAreGeneric), method.getOffset().getLine(), param.getOffset().getCharPositionInLine(), param.getOffset().getStopIndex()));
-                        methodsWithParametersLSPVariableList.add(new LSPParameter(method.name, new ArrayList<>(filterOutDuplicates(typesThatAreGeneric).stream().map(el -> new Type("<" + el.getType() + ">", true)).toList()), method.getOffset().getLine(), method.getOffset().getCharPositionInLine(), method.getOffset().getStopIndex()));
+        for (var variable : variables) {
+
+            HashMap<String, Type> uniqueType = new HashMap<>();
+
+            for (var type : variable.getPossibleTypes()) {
+                if (!uniqueType.containsKey(type.getType().replaceAll(" ", ""))) {
+                    uniqueType.put(type.getType(), type);
+                }
+            }
+            variable.setPossibleTypes(new ArrayList<>(uniqueType.values()));
+            logger.info(variable.getLine() + ":" + variable.getCharPosition());
+            for (Type t : variable.getPossibleTypes()) {
+                logger.info(t.getType());
+            }
+
+        }
+
+        return variables;
+    }
+
+    public void reduceCurrent(HashMap<LineCharPosition, String> combinedList, List<LSPVariable> variables) {
+
+        for (var lines : combinedList.entrySet()) {
+            var contentChange = lines.getValue();
+            for (LSPVariable variable : variables) {
+                for (Type typeOfVariable : variable.getPossibleTypes()) {
+
+                    if (typeOfVariable.getType().equalsIgnoreCase(contentChange.replaceAll(" ", ""))) {
+                        if (variable.getLine() - 1 == lines.getKey().line && variable.getCharPosition() == lines.getKey().charPosition) {
+                            current.getResultSets().removeIf(el -> !el.resolveType(variable.getOriginalTphName()).resolvedType.toString().equalsIgnoreCase(contentChange.replaceAll(" ", "")));
+
+                            return;
+                        }
+                    }
                 }
             }
         }
     }
 
-        return methodsWithParametersLSPVariableList;
+    public SourceFile getNewAst(String uri) throws IOException, URISyntaxException, ClassNotFoundException {
+        LanguageServerInterface languageServerInterface = new LanguageServerInterface();
+        return languageServerInterface.getAst(uri, RESET_TO_LETTER);
     }
 
+    public void updateAst(String uri) throws IOException, URISyntaxException, ClassNotFoundException {
+        logger.info("Old AST:");
+        logger.info(ASTPrinter.print(this.current.getAst()));
+        this.current = new LanguageServerTransferObject(current.getResultSets(), getNewAst(uri), "", current.getGeneratedGenerics());
+
+        logger.info("NEW AST:");
+        logger.info(ASTPrinter.print(current.getAst()));
+    }
 
 }

LanguageServer/src/main/java/de/dhbw/helper/TypeUtils.java

@@ -0,0 +1,39 @@
+package de.dhbw.helper;
+
+import de.dhbw.model.Type;
+import de.dhbwstuttgart.syntaxtree.Method;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TypeUtils {
+
+    public ArrayList<Type> getAvailableTypes(List<ResultSet> resultSets, RefTypeOrTPHOrWildcardOrGeneric parameter) {
+
+        ArrayList<String> paramTypes = new ArrayList<>();
+        resultSets.forEach(conSet -> {
+            if (parameter.toString().toLowerCase().contains("tph ")) {
+                paramTypes.add(conSet.resolveType(parameter).resolvedType.toString());
+            }
+        });
+
+        return new ArrayList<>(paramTypes.stream().filter(el -> !el.contains("TPH ")).map(el -> new Type(el, false)).toList());
+    }
+
+    public ArrayList<Type> getAvailableTypes(List<ResultSet> resultSets, Method method) {
+        ArrayList<String> normalType = new ArrayList<>();
+
+        resultSets.forEach(conSet -> {
+            if (method.getReturnType().toString().toLowerCase().contains("tph ")) {
+                normalType.add(conSet.resolveType(method.getReturnType()).resolvedType.toString());
+            }
+        });
+
+
+        return new ArrayList<>(normalType.stream().filter(el -> !el.contains("TPH ")).map(el -> new Type(el, false)).toList());
+
+    }
+
+}

LanguageServer/src/main/java/de/dhbw/model/DiagnosticsAndTypehints.java

@@ -0,0 +1,33 @@
+package de.dhbw.model;
+
+import org.eclipse.lsp4j.Diagnostic;
+import org.eclipse.lsp4j.InlayHint;
+
+import java.util.List;
+
+public class DiagnosticsAndTypehints {
+    private List<Diagnostic> diagnostics;
+    private List<InlayHint> inlayHints;
+
+    public List<Diagnostic> getDiagnostics() {
+        return diagnostics;
+    }
+
+    public List<InlayHint> getInlayHints() {
+        return inlayHints;
+    }
+
+    public void setDiagnostics(List<Diagnostic> diagnostics) {
+        this.diagnostics = diagnostics;
+    }
+
+    public void setInlayHints(List<InlayHint> inlayHints) {
+        this.inlayHints = inlayHints;
+    }
+
+    public DiagnosticsAndTypehints(List<Diagnostic> diagnostics, List<InlayHint> inlayHints){
+        this.diagnostics = diagnostics;
+        this.inlayHints = inlayHints;
+    }
+
+}

LanguageServer/src/main/java/de/dhbw/model/DocumentChanges.java

@@ -0,0 +1,41 @@
+package de.dhbw.model;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+public class DocumentChanges {
+    HashMap<LineCharPosition, String> preciseChanges = new HashMap<>();
+    ArrayList<Integer> offsetPerLine = new ArrayList<>();
+    HashMap<Integer, List<String>> textChanges = new HashMap<>();
+
+    public ArrayList<Integer> getOffsetPerLine() {
+        return offsetPerLine;
+    }
+
+    public HashMap<Integer, List<String>> getTextChanges() {
+        return textChanges;
+    }
+
+    public HashMap<LineCharPosition, String> getPreciseChanges() {
+        return preciseChanges;
+    }
+
+    public void setOffsetPerLine(ArrayList<Integer> offsetPerLine) {
+        this.offsetPerLine = offsetPerLine;
+    }
+
+    public void setPreciseChanges(HashMap<LineCharPosition, String> preciseChanges) {
+        this.preciseChanges = preciseChanges;
+    }
+
+    public void setTextChanges(HashMap<Integer, List<String>> textChanges) {
+        this.textChanges = textChanges;
+    }
+
+    public DocumentChanges(HashMap<LineCharPosition, String> preciseChanges, ArrayList<Integer> offsetPerLine, HashMap<Integer, List<String>> textChanges){
+        this.preciseChanges = preciseChanges;
+        this.offsetPerLine = offsetPerLine;
+        this.textChanges = textChanges;
+    }
+}

LanguageServer/src/main/java/de/dhbw/model/LSPClass.java

@@ -1,9 +1,11 @@
 package de.dhbw.model;
 
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+
 import java.util.ArrayList;
 
 public class LSPClass extends LSPVariable{
-    public LSPClass(String name, ArrayList<Type> possibleTypes, int line, int charPosition, int endPosition) {
-        super(name, possibleTypes, line, charPosition, endPosition);
+    public LSPClass(String name, ArrayList<Type> possibleTypes, int line, int charPosition, int endPosition, RefTypeOrTPHOrWildcardOrGeneric originalTphName) {
+        super(name, possibleTypes, line, charPosition, endPosition, originalTphName);
     }
 }

LanguageServer/src/main/java/de/dhbw/model/LSPMethod.java

@@ -1,9 +1,11 @@
 package de.dhbw.model;
 
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+
 import java.util.ArrayList;
 
 public class LSPMethod extends LSPVariable {
-    public LSPMethod(String name, ArrayList<Type> type, int line, int charPosition, int endPosition) {
-        super(name, type, line, charPosition, endPosition);
+    public LSPMethod(String name, ArrayList<Type> type, int line, int charPosition, int endPosition, RefTypeOrTPHOrWildcardOrGeneric originalTphName) {
+        super(name, type, line, charPosition, endPosition, originalTphName);
     }
 }

LanguageServer/src/main/java/de/dhbw/model/LSPParameter.java

@@ -1,10 +1,12 @@
 package de.dhbw.model;
 
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+
 import java.util.ArrayList;
 
-public class LSPParameter extends LSPMethod {
+public class LSPParameter extends LSPVariable {
 
-    public LSPParameter(String name, ArrayList<Type> type, int line, int charPosition, int endPosition) {
-        super(name, type, line, charPosition, endPosition);
+    public LSPParameter(String name, ArrayList<Type> type, int line, int charPosition, int endPosition, RefTypeOrTPHOrWildcardOrGeneric originalTphName) {
+        super(name, type, line, charPosition, endPosition, originalTphName);
     }
 }

LanguageServer/src/main/java/de/dhbw/model/LSPVariable.java

@@ -1,20 +1,33 @@
 package de.dhbw.model;
 
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+
 import java.util.ArrayList;
 
-public class LSPVariable {    String name;
+public class LSPVariable {
+    String name;
     ArrayList<Type> possibleTypes;
     int line;
     int charPosition;
     int endPosition;
     boolean needsInference;
+    RefTypeOrTPHOrWildcardOrGeneric originalTphName;
 
-    public LSPVariable(String name, ArrayList<Type> possibleTypes, int line, int charPosition, int endPosition) {
+    public LSPVariable(String name, ArrayList<Type> possibleTypes, int line, int charPosition, int endPosition, RefTypeOrTPHOrWildcardOrGeneric originalTphName) {
         this.name = name;
         this.possibleTypes = possibleTypes;
         this.line = line;
         this.charPosition = charPosition;
         this.endPosition = endPosition;
+        this.originalTphName = originalTphName;
+    }
+
+    public RefTypeOrTPHOrWildcardOrGeneric getOriginalTphName() {
+        return originalTphName;
+    }
+
+    public void setOriginalTphName(RefTypeOrTPHOrWildcardOrGeneric originalTphName) {
+        this.originalTphName = originalTphName;
     }
 
     public int getEndPosition() {

LanguageServer/src/main/java/de/dhbw/model/LineCharPosition.java

@@ -0,0 +1,25 @@
+package de.dhbw.model;
+
+public class LineCharPosition {
+    public final int line;
+    public final int charPosition;
+
+    public LineCharPosition(int line, int charPosition) {
+        this.line = line;
+        this.charPosition = charPosition;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof LineCharPosition)) return false;
+        LineCharPosition that = (LineCharPosition) o;
+        return line == that.line && charPosition == that.charPosition;
+    }
+
+
+    @Override
+    public String toString() {
+        return "Line " + line + ", Char " + charPosition;
+    }
+}

LanguageServer/src/main/java/de/dhbw/model/PlaceholderPoint.java

@@ -0,0 +1,93 @@
+package de.dhbw.model;
+
+import org.antlr.v4.runtime.Token;
+
+import java.util.Comparator;
+import java.util.List;
+import java.util.Set;
+
+public class PlaceholderPoint {
+    public Token point;
+    private String insertString;
+    private int extraOffset = 0;
+    private PlaceholderType kind;
+
+    public PlaceholderPoint(Token point, String toInsert, PlaceholderType kind){
+        this.point = point;
+        this.kind = kind;
+        this.insertString = (toInsert.endsWith(" ")) ? toInsert : toInsert + " " ;
+    }
+    
+    public boolean isGenericClassInsertPoint() {
+    	return kind == PlaceholderType.GENERIC_CLASS_INSERT;
+    }
+
+    public String insert(String intoSource, List<PlaceholderPoint> additionalOffset){
+        return new StringBuilder(intoSource).insert(point.getStartIndex()+extraOffset, insertString).toString();
+    }
+
+    public String getInsertString() {
+        return insertString;
+    }
+       
+    public void addExtraOffset(int toAdd) {
+    	this.extraOffset += toAdd;
+    }
+    
+    public int getPositionInCode() {
+    	return point.getStartIndex() + extraOffset; 
+    }
+    
+    /* PL 2018-06-19
+     * Zwei TypeInsertPoint's sind gleich, wenn ihre point's gleich sind 
+     * eingefuegt damit man TypeReplaceMarker vergleichen kann
+     * @see java.lang.Object#equals(java.lang.Object)
+     */
+    public boolean equals(Object obj) {
+    	return this == obj;
+    	/*
+    	if(!(obj instanceof TypeInsertPoint)) {
+			return false;
+    	}
+    	else {
+    		return 
+	    		((TypeInsertPoint)obj).getPositionInCode() == this.getPositionInCode() &&
+	    		((TypeInsertPoint)obj).insertString.equals(this.insertString);
+    	}		
+    	*/	
+    }
+    
+    public int hashCode() {
+    	return getPositionInCode() * 11 * insertString.hashCode();
+    }
+    
+    public Set<PlaceholderPoint> getAdditionalPoints() {
+    	return this.getAdditionalPoints();
+    }
+    
+    public String toString() {
+    	return point.getLine() + ":" + point.getCharPositionInLine() + ":" + insertString;
+    }
+    
+    public static final class TypeInsertPointPositionComparator implements Comparator<PlaceholderPoint> {
+
+    	@Override
+    	public int compare(PlaceholderPoint o1, PlaceholderPoint o2) {
+    		if (o1.point == null && o2.point == null) {
+    			return 0;
+    		} else if (o2.point == null) {
+    			return 1;
+    		} else if (o1.point == null) {
+    			return -1;
+    		}
+    		
+    		if (o1.getPositionInCode() > o2.getPositionInCode()) {
+    			return 1;
+    		} else if (o1.getPositionInCode() < o2.getPositionInCode()) {
+    			return -1;
+    		}
+    		return 0;
+    	}
+
+    }
+}

LanguageServer/src/main/java/de/dhbw/model/PlaceholderType.java

@@ -0,0 +1,7 @@
+package de.dhbw.model;
+
+public enum PlaceholderType {
+	NORMAL_INSERT,
+	GENERIC_CLASS_INSERT,
+	GENERERIC_METHOD_INSERT
+}

LanguageServer/src/main/java/de/dhbw/model/PlaceholderVariable.java

@@ -0,0 +1,68 @@
+package de.dhbw.model;
+
+import de.dhbwstuttgart.typeinference.result.ResultPair;
+
+import java.util.*;
+
+public class PlaceholderVariable {
+    /**
+     * point wird hauptsächlich zur Anzeige einer Annotation im Eclipse-plugin benutzt.
+     */
+    public final PlaceholderPoint point;
+    Set<PlaceholderPoint> inserts;
+    ResultPair<?, ?> resultPair;
+
+    public PlaceholderVariable(PlaceholderPoint point, Set<PlaceholderPoint> additionalPoints, ResultPair<?, ?> resultPair) {
+        this.point = point;
+        inserts = additionalPoints;
+        this.resultPair = resultPair;
+    }
+
+    public String insert(String intoSource) {
+        List<PlaceholderPoint> offsets = new ArrayList<>();
+        String ret = intoSource;
+
+        List<PlaceholderPoint> insertsSorted = new ArrayList<>();
+        insertsSorted.add(point);
+        insertsSorted.addAll(inserts);
+        Collections.sort(insertsSorted, new PlaceholderPoint.TypeInsertPointPositionComparator().reversed());
+
+        for (PlaceholderPoint insertPoint : insertsSorted) {
+            ret = insertPoint.insert(ret, new ArrayList<>());
+            offsets.add(insertPoint);
+        }
+        return ret;
+    }
+
+    public String getInsertString() {
+        return point.getInsertString();
+    }
+
+    public ResultPair<?, ?> getResultPair() {
+        return this.resultPair;
+    }
+
+    public boolean equals(Object obj) {
+        if (!(obj instanceof PlaceholderVariable)) {
+            return false;
+        } else {
+            return ((PlaceholderVariable) obj).point.equals(this.point);
+
+        }
+    }
+
+    public Set<PlaceholderPoint> getAdditionalPoints() {
+        PlaceholderPoint.TypeInsertPointPositionComparator comparator = new PlaceholderPoint.TypeInsertPointPositionComparator();
+        TreeSet<PlaceholderPoint> result = new TreeSet<>(comparator.reversed());
+        result.addAll(inserts);
+        return result;
+    }
+
+    public Set<PlaceholderPoint> getAdditionalPointsUnsorted() {
+        return inserts;
+    }
+
+    public String toString() {
+        return point.toString();
+    }
+}

LanguageServer/src/main/java/de/dhbw/model/Type.java

@@ -24,4 +24,15 @@ public class Type {
     public boolean isGeneric() {
         return generic;
     }
+
+
+    @Override
+    public boolean equals(Object obj) {
+        return type.equals(obj.toString());
+    }
+
+    @Override
+    public String toString() {
+        return type;
+    }
 }

LanguageServer/src/main/java/de/dhbw/service/CacheService.java

@@ -0,0 +1,155 @@
+package de.dhbw.service;
+
+import de.dhbw.helper.CodeSnippetOptions;
+import de.dhbw.helper.TextHelper;
+import de.dhbw.helper.TypeResolver;
+import de.dhbw.model.LSPVariable;
+import de.dhbwstuttgart.typedeployment.TypeInsert;
+import org.eclipse.lsp4j.Diagnostic;
+import org.eclipse.lsp4j.InlayHint;
+
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+public class CacheService {
+    private HashMap<String, List<InlayHint>> globalInlayHintMap = new HashMap<>();
+    private HashMap<String, String> lastSavedFiles = new HashMap<>();
+    private Boolean currentlyCalculating = false;
+    private HashMap<String, List<Diagnostic>> globalDiagnosticsMap = new HashMap<>();
+    private HashMap<String, String> textDocuments = new HashMap<>();
+    private CodeSnippetOptions codeSnippetOptions = new CodeSnippetOptions();
+    private TextHelper textHelper = new TextHelper();
+    private Boolean dontShowHints = false;
+    private TypeResolver typeResolver = new TypeResolver();
+    private Path fileRoot = null;
+    private Boolean singleFileOpened = false;
+    private List<LSPVariable> variables = new ArrayList<>();
+    private List<TypeInsert> typeInserts;
+
+    public List<TypeInsert> getTypeInserts() {
+        return typeInserts;
+    }
+
+    public void setTypeInserts(List<TypeInsert> typeInserts) {
+        this.typeInserts = typeInserts;
+    }
+
+    public void reset(){
+       globalInlayHintMap = new HashMap<>();
+       lastSavedFiles = new HashMap<>();
+       currentlyCalculating = false;
+       globalDiagnosticsMap = new HashMap<>();
+       textDocuments = new HashMap<>();
+       codeSnippetOptions = new CodeSnippetOptions();
+       textHelper = new TextHelper();
+       dontShowHints = false;
+       typeResolver = new TypeResolver();
+       fileRoot = null;
+       singleFileOpened = false;
+       typeInserts = null;
+    }
+
+
+    public void updateGlobalMaps(List<Diagnostic> diagnostics, List<InlayHint> typeHint, String uri) {
+        globalDiagnosticsMap.put(uri, diagnostics);
+        globalInlayHintMap.put(uri, typeHint);
+    }
+
+    public Boolean getCurrentlyCalculating() {
+        return currentlyCalculating;
+    }
+
+    public Boolean getDontShowHints() {
+        return dontShowHints;
+    }
+
+    public Boolean getSingleFileOpened() {
+        return singleFileOpened;
+    }
+
+    public HashMap<String, String> getLastSavedFiles() {
+        return lastSavedFiles;
+    }
+
+    public void setLastSavedFiles(HashMap<String, String> lastSavedFiles) {
+        this.lastSavedFiles = lastSavedFiles;
+    }
+
+    public CodeSnippetOptions getCodeSnippetOptions() {
+        return codeSnippetOptions;
+    }
+
+    public HashMap<String, List<Diagnostic>> getGlobalDiagnosticsMap() {
+        return globalDiagnosticsMap;
+    }
+
+    public HashMap<String, List<InlayHint>> getGlobalInlayHintMap() {
+        return globalInlayHintMap;
+    }
+
+    public HashMap<String, String> getTextDocuments() {
+        return textDocuments;
+    }
+
+    public List<LSPVariable> getVariables() {
+        return variables;
+    }
+
+    public Path getFileRoot() {
+        return fileRoot;
+    }
+
+    public TextHelper getTextHelper() {
+        return textHelper;
+    }
+
+    public TypeResolver getTypeResolver() {
+        return typeResolver;
+    }
+
+    public void setCodeSnippetOptions(CodeSnippetOptions codeSnippetOptions) {
+        this.codeSnippetOptions = codeSnippetOptions;
+    }
+
+    public void setCurrentlyCalculating(Boolean currentlyCalculating) {
+        this.currentlyCalculating = currentlyCalculating;
+    }
+
+    public void setDontShowHints(Boolean dontShowHints) {
+        this.dontShowHints = dontShowHints;
+    }
+
+    public void setFileRoot(Path fileRoot) {
+        this.fileRoot = fileRoot;
+    }
+
+    public void setGlobalDiagnosticsMap(HashMap<String, List<Diagnostic>> globalDiagnosticsMap) {
+        this.globalDiagnosticsMap = globalDiagnosticsMap;
+    }
+
+    public void setGlobalInlayHintMap(HashMap<String, List<InlayHint>> globalInlayHintMap) {
+        this.globalInlayHintMap = globalInlayHintMap;
+    }
+
+    public void setSingleFileOpened(Boolean singleFileOpened) {
+        this.singleFileOpened = singleFileOpened;
+    }
+
+    public void setTextDocuments(HashMap<String, String> textDocuments) {
+        this.textDocuments = textDocuments;
+    }
+
+    public void setTextHelper(TextHelper textHelper) {
+        this.textHelper = textHelper;
+    }
+
+    public void setTypeResolver(TypeResolver typeResolver) {
+        this.typeResolver = typeResolver;
+    }
+
+    public void setVariables(List<LSPVariable> variables) {
+        this.variables = variables;
+    }
+}

LanguageServer/src/main/java/de/dhbw/service/ClientService.java

@@ -0,0 +1,79 @@
+package de.dhbw.service;
+
+import org.eclipse.lsp4j.*;
+import org.eclipse.lsp4j.jsonrpc.messages.Either;
+import org.eclipse.lsp4j.services.LanguageClient;
+
+import java.util.List;
+
+public class ClientService {
+
+    private LanguageClient client;
+
+    public ClientService(LanguageClient client) {
+        this.client = client;
+    }
+
+    public void publishDiagnostics(String uri, List<Diagnostic> diagnostics){
+        PublishDiagnosticsParams diagnosticsParams = new PublishDiagnosticsParams(uri, diagnostics);
+        client.publishDiagnostics(diagnosticsParams);
+    }
+
+    public void sendClientLog(MessageType type, String message){
+        client.logMessage(new MessageParams(type, message));
+    }
+
+    public void sendClientLog(String message){
+        client.logMessage(new MessageParams(MessageType.Info, message));
+    }
+
+    public void showMessage(MessageType type, String message) {
+        client.showMessage(new MessageParams(type, message));
+    }
+
+    public void showMessage(String message) {
+        client.showMessage(new MessageParams(MessageType.Info, message));
+    }
+
+    public void setClient(LanguageClient client) {
+        this.client = client;
+    }
+
+    public void updateClient(LanguageClient client) {
+        client.refreshInlayHints();
+        client.refreshDiagnostics();
+    }
+
+    public void updateClient() {
+        client.refreshInlayHints();
+        client.refreshDiagnostics();
+    }
+
+    public LanguageClient getClient() {
+        return client;
+    }
+
+    public void startLoading(String taskName, String title, LanguageClient client) {
+        Either<String, Integer> token = Either.forLeft(taskName);
+        client.createProgress(new WorkDoneProgressCreateParams(token));
+
+        WorkDoneProgressBegin begin = new WorkDoneProgressBegin();
+        begin.setTitle(title);
+        begin.setCancellable(false);
+        begin.setPercentage(0);
+
+        ProgressParams beginParams = new ProgressParams(token, Either.forLeft(begin));
+        client.notifyProgress(beginParams);
+
+    }
+
+    public void stopLoading(String taskName, String title, LanguageClient client) {
+        Either<String, Integer> token = Either.forLeft(taskName);
+        WorkDoneProgressEnd end = new WorkDoneProgressEnd();
+        end.setMessage(title);
+
+        ProgressParams endParams = new ProgressParams(token, Either.forLeft(end));
+        client.notifyProgress(endParams);
+    }
+
+}

LanguageServer/src/main/java/de/dhbw/service/LogService.java

@@ -0,0 +1,31 @@
+package de.dhbw.service;
+
+import org.apache.log4j.LogManager;
+import org.apache.log4j.Logger;
+import org.eclipse.lsp4j.MessageType;
+
+public class LogService {
+
+    private final Logger logger = LogManager.getLogger(LogService.class);
+    private final ClientService clientService;
+
+    public LogService(ClientService clientService) {
+        this.clientService = clientService;
+    }
+
+    public void log(String message, MessageType type) {
+        clientService.sendClientLog(type, message);
+        switch (type) {
+            case Error -> logger.error(message);
+            case Warning -> logger.warn(message);
+            case Info -> logger.info(message);
+            default -> logger.debug(message);
+        }
+    }
+
+    public void log(String message) {
+        clientService.sendClientLog(MessageType.Info, message);
+        logger.info(message);
+    }
+
+}

LanguageServer/src/main/java/de/dhbw/service/ParserService.java

@@ -0,0 +1,35 @@
+package de.dhbw.service;
+
+import de.dhbw.helper.ConversionHelper;
+import de.dhbwstuttgart.languageServerInterface.ParserInterface;
+import de.dhbwstuttgart.languageServerInterface.model.ParserError;
+import org.eclipse.lsp4j.Diagnostic;
+
+import java.util.List;
+
+public class ParserService {
+
+    private final ConversionHelper conversionHelper;
+    private final ClientService clientService;
+
+
+    public ParserService(ConversionHelper conversionHelper, ClientService clientService, CacheService cacheService) {
+        this.conversionHelper = conversionHelper;
+        this.clientService = clientService;
+    }
+
+    public List<ParserError> getParserErrors(String input){
+        ParserInterface parserInterface = new ParserInterface();
+        return parserInterface.getParseErrors(input);
+    }
+
+    public void checkParser(String input, String uri) {
+        List<Diagnostic> diagnosticsList = conversionHelper.parseErrorToDiagnostic(getParserErrors(input));
+        clientService.publishDiagnostics(uri, diagnosticsList);
+    }
+
+    public List<Diagnostic> getDiagnosticsOfErrors(String input, String uri) {
+        return conversionHelper.parseErrorToDiagnostic(getParserErrors(input));
+
+    }
+}

LanguageServer/src/main/java/de/dhbw/service/TextDocumentService.java

@@ -0,0 +1,121 @@
+package de.dhbw.service;
+
+import de.dhbw.model.DocumentChanges;
+import de.dhbw.model.LineCharPosition;
+import org.eclipse.lsp4j.Range;
+
+import java.util.*;
+
+public class TextDocumentService {
+
+    private final HashMap<String, String> files = new HashMap<>();
+
+    public TextDocumentService(){
+
+    }
+
+    public void reset(){
+        files.clear();
+    }
+
+
+    public String getFileOfUri(String uri) {
+        return files.get(uri);
+    }
+
+    public void saveFileWithUri(String uri, String input) {
+        files.put(uri, input);
+    }
+
+    public DocumentChanges calculateDifference(String currentText, String newText){
+        ArrayList<String> currentTextLines = new ArrayList<>(Arrays.stream(currentText.split("\n")).toList());
+        ArrayList<String> newTextLines = new ArrayList<>(Arrays.stream(newText.split("\n")).toList());
+        HashMap<LineCharPosition, String> preciseChanges = new HashMap<>();
+        ArrayList<Integer> offsetPerLine = new ArrayList<>();
+        HashMap<Integer, List<String>> textChanges = new HashMap<>();
+        int index = 0;
+        for (String newTextLine : newTextLines) {
+            if (!(currentTextLines.size() > index)) {
+                offsetPerLine.add(0);
+            } else {
+                Map<LineCharPosition, String> lineDiffs = differenceLinePos(currentTextLines.get(index), newTextLine, index);
+                preciseChanges.putAll(lineDiffs);
+                textChanges.put(index, difference(currentTextLines.get(index), newTextLine).stream().map(el -> el.replaceAll(" ", "")).toList());
+                offsetPerLine.add(newTextLine.length() - currentTextLines.get(index).length());
+            }
+
+            index++;
+        }
+
+        return new DocumentChanges(preciseChanges, offsetPerLine, textChanges);
+    }
+
+    public Map<LineCharPosition, String> differenceLinePos(String first, String second, int line) {
+        Map<LineCharPosition, String> result = new HashMap<>();
+
+        int i = 0, j = 0;
+        int startDiff = -1;
+
+        while (j < second.length()) {
+            if (i < first.length() && first.charAt(i) == second.charAt(j)) {
+                if (startDiff != -1) {
+                    String diff = second.substring(startDiff, j);
+                    result.put(new LineCharPosition(line, startDiff), diff);
+                    startDiff = -1;
+                }
+                i++;
+                j++;
+            } else {
+                if (startDiff == -1) {
+                    startDiff = j;
+                }
+                j++;
+            }
+        }
+
+        if (startDiff != -1) {
+            String diff = second.substring(startDiff);
+            result.put(new LineCharPosition(line, startDiff), diff);
+        }
+
+        return result;
+    }
+
+    public ArrayList<String> difference(String first, String second) {
+        ArrayList<String> result = new ArrayList<>();
+
+        int i = 0, j = 0;
+        int startDiff = -1;
+
+        while (j < second.length()) {
+            if (i < first.length() && first.charAt(i) == second.charAt(j)) {
+                if (startDiff != -1) {
+                    result.add(second.substring(startDiff, j));
+                    startDiff = -1;
+                }
+                i++;
+                j++;
+            } else {
+                if (startDiff == -1) {
+                    startDiff = j;
+                }
+                j++;
+            }
+        }
+
+        if (startDiff != -1) {
+            result.add(second.substring(startDiff));
+        }
+
+        return result;
+    }
+
+    public boolean rangesOverlap(Range range1, Range range2) {
+        int start1 = range1.getStart().getLine() * 1000 + range1.getStart().getCharacter();
+        int end1 = range1.getEnd().getLine() * 1000 + range1.getEnd().getCharacter();
+        int start2 = range2.getStart().getLine() * 1000 + range2.getStart().getCharacter();
+        int end2 = range2.getEnd().getLine() * 1000 + range2.getEnd().getCharacter();
+
+        return start1 <= end2 && start2 <= end1;
+    }
+}

LanguageServer/src/test/java/CodeSnippetOptionsTest.java

@@ -1,6 +1,5 @@
 
 import de.dhbw.helper.CodeSnippetOptions;
-import de.dhbw.model.SnippetWithName;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;

LanguageServer/src/test/java/CompilerInterfaceTest.java

@@ -6,25 +6,12 @@ import org.junit.Assert;
 import org.junit.Test;
 
 import java.io.IOException;
-import java.util.ArrayList;
+import java.net.URISyntaxException;
 
 public class CompilerInterfaceTest {
 
     @Test
-    public void testAbstractSyntaxAsString() throws IOException, ClassNotFoundException {
-//        LanguageServerInterface languageServer = new LanguageServerInterface();
-//        var res = languageServer.getResultSetAndAbstractSyntax("import java.lang.Integer;\n import java.lang.String;\n" +
-//                "public class test{\n" +
-//                "public main(test){" +
-//                "if(0>1){" +
-//                "return \"w\";" +
-//                "}" +
-//                "Integer i = 0;" +
-//                "return i;" +
-//                "}" +
-//                "}", "TEST");
-//
-//        System.out.println("TEST OUTPUT:");
+    public void testAbstractSyntaxAsString() throws IOException, ClassNotFoundException, URISyntaxException {
 //
 //        ArrayList<String> allTypes = new ArrayList<>();
 //
@@ -40,18 +27,16 @@ public class CompilerInterfaceTest {
     }
 
     @Test
-    public void testConstraintTypes() throws IOException, ClassNotFoundException {
-//        LanguageServerInterface languageServer = new LanguageServerInterface();
-//        TypeResolver typeResolver = new TypeResolver();
-//
-//
-//        var res = typeResolver.infereInput("import java.lang.Integer; public class test{\n" +
-//                "    \n" +
-//                "    public main(testa){\n" +
-//                "   return testa;\n" +
-//                "    }\n" +
-//                "}");
-//        res.forEach(el -> el.getPossibleTypes().forEach(el2 -> System.out.println(el2.getType() + " " + (el2.isGeneric() ? "GENERIC" : "NO GENERIC"))));
+    public void testConstraintTypes() throws IOException, ClassNotFoundException, URISyntaxException {
+        LanguageServerInterface languageServer = new LanguageServerInterface();
+        TypeResolver typeResolver = new TypeResolver();
+
+
+        var res = languageServer.getResultSetAndAbstractSyntax("/home/ruben/Documents/JavaTXLanguageServer/test/test.jav");
+
+        var res2 = languageServer.getResultSetAndAbstractSyntax("/home/ruben/Documents/JavaTXLanguageServer/test/test.jav");
+
+        System.out.println("");
     }
 
     @Test

LanguageServer/src/test/java/JavaTXLanguageDocumentServiceTest.java

@@ -1,7 +1,3 @@
-import de.dhbw.JavaTXTextDocumentService;
-import de.dhbw.helper.CodeSnippetOptions;
-import org.eclipse.lsp4j.DidSaveTextDocumentParams;
-import org.eclipse.lsp4j.TextDocumentIdentifier;
 import org.junit.Ignore;
 import org.junit.jupiter.api.Test;
 
@@ -11,6 +7,7 @@ public class JavaTXLanguageDocumentServiceTest {
     @Test
     @Ignore
     public void testWordExtraction() {
-        JavaTXTextDocumentService service = new JavaTXTextDocumentService();
+//        JavaTXTextDocumentService service = new JavaTXTextDocumentService();
+//         service.didSave(new DidSaveTextDocumentParams(new TextDocumentIdentifier("file:///c%3A/Users/ruben/Neuer%20Ordner%20%282%29/LSP-Vortrag/images/test.jav")));
     }
 }

test/test.jav

@@ -0,0 +1,5 @@
+public class t{
+    public test(){
+        return 1;
+    }
+}