add README

.gitignore

@@ -1,5 +1,6 @@
 gen/
 sample#/
+target/
 *.dot
 *.svg
 *.gefx

.idea/copilot.data.migration.agent.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AgentMigrationStateService">
+    <option name="migrationStatus" value="COMPLETED" />
+  </component>
+</project>

.idea/misc.xml

@@ -34,5 +34,5 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_24" default="true" project-jdk-name="homebrew-23" project-jdk-type="JavaSDK" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_X" default="true" project-jdk-name="homebrew-23" project-jdk-type="JavaSDK" />
 </project>

README.md

@@ -0,0 +1,41 @@
+This is a first working state of the plugin. It has not been tested thoroughly. It has not been tested on windows at all.
+
+This allows you to mix .java and .jav files in a single project. However, circular dependencies between .java and .jav files are not allowed as both compilers can read .class files but neither is aware of the other source files.
+
+In theory, this should not be a problem as JavaTX is supposed to be a superset of Java. In practice however, there are features missing in JavaTX that Java supports (e.g. Arrays)
+# Installation
+
+To install run
+```mvn install```
+in the root of this directory. This will install the plugin to your local maven repository.
+
+Then you can use it as a plugin in your maven project by adding the plugin to your project's pom.xml. Make sure to change the javaTXCompilerLocation configuration variable to the correct location.
+It needs to point to a jar file.
+```
+<build>
+    <plugins>
+        <plugin>
+            <groupId>de.dhbwstuttgart</groupId>
+            <artifactId>javatx-compiler-plugin</artifactId>
+            <version>1.0-SNAPSHOT</version>
+            <configuration>
+                <javaTXCompilerLocation>path-to-your-java-tx-compiler-location</javaTXCompilerLocation>
+            </configuration>
+            <!-- Currently this is the way to override the mvn:compile lifecycle step with this plugin instead of the standard one -->
+            <executions>
+                <execution>
+                    <id>custom-compile</id>
+                    <phase>compile</phase>
+                    <goals>
+                        <goal>compile-javatx-project</goal>
+                    </goals>
+                </execution>
+            </executions>
+        </plugin>
+        
+        ... additional plugins
+    </plugins>
+</build>
+```
+
+Now you can use the typical `mvn:compile` to compile the project. 

javatx-compiler-plugin.iml

@@ -3,6 +3,8 @@
   <component name="AdditionalModuleElements">
     <content url="file://$MODULE_DIR$" dumb="true">
       <sourceFolder url="file://$MODULE_DIR$/target/generated-sources/antlr4" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/gen" />
+      <excludeFolder url="file://$MODULE_DIR$/sample#" />
     </content>
   </component>
 </module>

pom.xml

@@ -9,8 +9,7 @@
   <packaging>maven-plugin</packaging>
 
   <name>javatx-compiler-plugin</name>
-  <!-- FIXME change it to the project's website -->
-  <url>http://www.example.com</url>
+  <url>https://dhbw-stuttgart.de/horb</url>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -122,7 +121,7 @@
         <artifactId>maven-plugin-plugin</artifactId>
         <version>3.13.1</version>
         <configuration>
-          <goalPrefix>javatx-compiler</goalPrefix>
+          <goalPrefix>javatx-compiler-plugin</goalPrefix>
         </configuration>
         <executions>
           <execution>

src/main/java/de/dhbwstuttgart/App.java

@@ -1,35 +0,0 @@
-package de.dhbwstuttgart;
-
-import de.dhbwstuttgart.parser.JavaTXDependencyObtainer;
-import org.antlr.v4.runtime.CharStream;
-import org.antlr.v4.runtime.CharStreams;
-import org.antlr.v4.runtime.CommonTokenStream;
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.antlr.v4.runtime.tree.ParseTreeWalker;
-
-import java.io.IOException;
-
-/**
- * Hello world!
- */
-/*
-public class App {
-    public static void main(String[] args) throws IOException {
-        CharStream input = CharStreams.fromStream(System.in);
-
-        JavaTXLexer lexer = new JavaTXLexer(input);
-        CommonTokenStream tokens = new CommonTokenStream(lexer);
-
-        JavaTXParser parser = new JavaTXParser(tokens);
-        ParseTree tree = parser.sourceFile();
-
-        JavaTXDependencyObtainer dependencyObtainer = new JavaTXDependencyObtainer();
-        ParseTreeWalker walker = new ParseTreeWalker();
-        walker.walk(dependencyObtainer, tree);
-
-        System.out.println("Package: " + dependencyObtainer.getPackageDecl());
-        System.out.println("Imports: " + dependencyObtainer.getImports());
-        System.out.println("Classes: " + dependencyObtainer.getClasses());
-    }
-}
-*/

src/main/java/de/dhbwstuttgart/javaanalyzer/JavaDependencyResolver.java

@@ -46,10 +46,6 @@ public class JavaDependencyResolver {
                 .setSymbolResolver(new JavaSymbolSolver(solver))
                 .setLanguageLevel(ParserConfiguration.LanguageLevel.JAVA_21);
 
-        if (file.getName().equals("StatementToTargetExpression.java")){
-            System.out.println();
-        }
-
         // Parse a source file
         JavaParser parser = new JavaParser(config);
 
@@ -152,7 +148,7 @@ public class JavaDependencyResolver {
                 ResolvedType type = param.getType().resolve();
                 dependencies.addAll(getAllInnerTypes(type));
             } catch (Exception e) {
-                System.out.println("Unresolved Parameter: " + param);
+                //System.out.println("Unresolved Parameter: " + param);
             }
         });
         return dependencies;
@@ -289,7 +285,6 @@ public class JavaDependencyResolver {
         else{
             return null; // Unsupported type declaration
         }
-        System.out.println("generating dependency for type: " + typeDecl.getName() + " at path: " + path.toAbsolutePath());
         if(isJavaTXFile) return new Dependency(packagePath, new JavaTXSourceFile(path.toAbsolutePath().toFile()), true);
         else return new Dependency(packagePath, new JavaSourceFile(path.toAbsolutePath().toFile()), false);
     }

src/main/java/de/dhbwstuttgart/javatxanalyzer/JavaTXDependencyResolver.java

@@ -1,7 +1,5 @@
 package de.dhbwstuttgart.javatxanalyzer;
 
-import com.github.javaparser.ast.type.ReferenceType;
-import com.github.javaparser.resolution.types.ResolvedType;
 import com.github.javaparser.symbolsolver.resolution.typesolvers.CombinedTypeSolver;
 import com.github.javaparser.symbolsolver.resolution.typesolvers.JavaParserTypeSolver;
 import com.github.javaparser.symbolsolver.resolution.typesolvers.ReflectionTypeSolver;
@@ -11,6 +9,8 @@ import de.dhbwstuttgart.javaanalyzer.JavaTXTypeSolver;
 import de.dhbwstuttgart.parser.JavaTXDependencyObtainer;
 import de.dhbwstuttgart.parser.antlr.JavaTXLexer;
 import de.dhbwstuttgart.parser.antlr.JavaTXParser;
+import de.dhbwstuttgart.structure.JavaSourceFile;
+import de.dhbwstuttgart.structure.JavaTXSourceFile;
 import org.antlr.v4.runtime.CharStream;
 import org.antlr.v4.runtime.CharStreams;
 import org.antlr.v4.runtime.CommonTokenStream;
@@ -20,15 +20,13 @@ import org.antlr.v4.runtime.tree.ParseTreeWalker;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
-import java.sql.Array;
-import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
 public class JavaTXDependencyResolver {
 
-    public static Set<Dependency> getDependenciesForJavaTXFile(File sourceFile, List<File> javaFilesPaths, List<File> javFilesPaths) throws IOException {
+    public static Set<Dependency> getDependenciesForJavaTXFile(File sourceFile, List<JavaSourceFile> javaFilesPaths, List<JavaTXSourceFile> javFilesPaths, List<File> srcDirs) throws IOException {
         CharStream input = CharStreams.fromStream(new FileInputStream(sourceFile));
 
         JavaTXLexer lexer = new JavaTXLexer(input);
@@ -45,11 +43,11 @@ public class JavaTXDependencyResolver {
 
         CombinedTypeSolver solver = new CombinedTypeSolver();
         solver.add(new ReflectionTypeSolver()); // JDK classes
-        for (var file : javaFilesPaths) {
-            solver.add(new JavaParserTypeSolver(file)); // Java Files
+        for (var dir : srcDirs) {
+            solver.add(new JavaParserTypeSolver(dir)); // Java Files
         }
-        for (var file : javFilesPaths) {
-            solver.add(new JavaTXTypeSolver(file)); // Jav Files
+        for (var dir : srcDirs) {
+            solver.add(new JavaTXTypeSolver(dir)); // Jav Files
         }
 
         for(var dep : dependencyObtainer.getImports()){

src/main/java/de/dhbwstuttgart/mojos/CompilerMojo.java

@@ -1,13 +1,13 @@
 package de.dhbwstuttgart.mojos;
 
 import com.github.javaparser.symbolsolver.resolution.typesolvers.CombinedTypeSolver;
+import com.github.javaparser.symbolsolver.resolution.typesolvers.JarTypeSolver;
 import com.github.javaparser.symbolsolver.resolution.typesolvers.JavaParserTypeSolver;
 import com.github.javaparser.symbolsolver.resolution.typesolvers.ReflectionTypeSolver;
 import de.dhbwstuttgart.javaanalyzer.*;
 import de.dhbwstuttgart.javatxanalyzer.JavaTXDependencyResolver;
 import de.dhbwstuttgart.structure.*;
-import de.dhbwstuttgart.utils.CompilationHelper;
-import de.dhbwstuttgart.utils.Utils;
+import de.dhbwstuttgart.utils.*;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.plugin.AbstractMojo;
 import org.apache.maven.plugin.MojoExecutionException;
@@ -15,13 +15,15 @@ import org.apache.maven.plugin.MojoFailureException;
 import org.apache.maven.plugins.annotations.LifecyclePhase;
 import org.apache.maven.plugins.annotations.Mojo;
 import org.apache.maven.plugins.annotations.Parameter;
+import org.apache.maven.plugins.annotations.ResolutionScope;
 import org.apache.maven.project.MavenProject;
 
 
 import java.io.*;
 import java.util.*;
+import java.util.stream.Collectors;
 
-@Mojo(name="compile javatx project", defaultPhase= LifecyclePhase.COMPILE)
+@Mojo(name="compile-javatx", defaultPhase= LifecyclePhase.COMPILE, requiresDependencyResolution = ResolutionScope.COMPILE_PLUS_RUNTIME)
 public class CompilerMojo extends AbstractMojo {
 
     @Parameter(property = "JavaTXCompilerLocation", required = true)
@@ -30,36 +32,83 @@ public class CompilerMojo extends AbstractMojo {
     @Parameter(defaultValue = "${project}", required = true, readonly = true)
     private MavenProject project;
 
+//    public static void main(String[] args) throws IOException {
+//       // List<File> compileSourceRoots = List.of(new File("/Users/julianschmidt/dhbw/javatx/JavaCompilerCoreInJavaTXMavenPlugin/src/main/java"), new File("/Users/julianschmidt/dhbw/javatx/JavaCompilerCoreInJavaTXMavenPlugin/target/generated-sources/antlr4"));
+////        List<File> dependencies = List.of(
+////        new File("/Users/julianschmidt/.m2/repository/org/antlr/antlr4/4.13.2/antlr4-4.13.2.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/org/antlr/antlr4-runtime/4.13.2/antlr4-runtime-4.13.2.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/org/antlr/antlr-runtime/3.5.3/antlr-runtime-3.5.3.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/org/antlr/ST4/4.3.4/ST4-4.3.4.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/org/abego/treelayout/org.abego.treelayout.core/1.0.3/org.abego.treelayout.core-1.0.3.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/com/ibm/icu/icu4j/72.1/icu4j-72.1.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/commons-io/commons-io/2.19.0/commons-io-2.19.0.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/io/github/classgraph/classgraph/4.8.180/classgraph-4.8.180.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/com/google/guava/guava/33.4.8-jre/guava-33.4.8-jre.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/com/google/guava/failureaccess/1.0.3/failureaccess-1.0.3.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/com/google/guava/listenablefuture/9999.0-empty-to-avoid-conflict-with-guava/listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/org/jspecify/jspecify/1.0.0/jspecify-1.0.0.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/com/google/errorprone/error_prone_annotations/2.36.0/error_prone_annotations-2.36.0.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/com/google/j2objc/j2objc-annotations/3.0.0/j2objc-annotations-3.0.0.jar"),
+////        new File("/Users/julianschmidt/.m2/repository/org/ow2/asm/asm/9.8/asm-9.8.jar"));
+//
+////        File outputDir = new File("/Users/julianschmidt/dhbw/javatx/JavaCompilerCoreInJavaTXMavenPlugin/target/classes");
+////        File compilerLocation = new File("/Users/julianschmidt/dhbw/javatx/JavaCompilerCore/target/JavaTXcompiler-0.1-jar-with-dependencies.jar");
+//        //compile(compileSourceRoots, dependencies, outputDir, compilerLocation);
+//          List<File> compileSourceRoots = List.of(new File("/Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/sample#"));
+//          File outputDir = new File("/Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/target/classes");
+//        File compilerLocation = new File("/Users/julianschmidt/dhbw/javatx/JavaCompilerCore/target/JavaTXcompiler-0.1-jar-with-dependencies.jar");
+//        compile(compileSourceRoots, List.of(), outputDir, compilerLocation);
+//    }
+
     @Override
     public void execute() throws MojoExecutionException, MojoFailureException {
-        try {
             List<?> dir = project.getCompileSourceRoots();
             List<File> compileSourceRoots = new ArrayList<>();
-            for(var d : dir){
+            for (var d : dir) {
                 if (d instanceof String path) {
                     compileSourceRoots.add(new File(path));
                 }
                 getLog().info("Compile Source Root: " + d);
             }
-            var files = CompilerMojo.getAllJavaFiles(compileSourceRoots.getFirst());
-            var javFiles = CompilerMojo.getAllJavaTXFiles(compileSourceRoots.getFirst());
-            Set<?> artifacts = project.getArtifacts();
+
+            List<File> mavenDependencies = new ArrayList<>();
 
             for (var artifact : project.getArtifacts()) {
-                if (artifact instanceof Artifact a){
+                if (artifact instanceof Artifact a) {
                     File file = a.getFile();
                     if (file != null) {
-                        getLog().info("Dependency: " + a.getArtifactId() + " at " + file.getAbsolutePath());
+                        mavenDependencies.add(file);
                     }
                 }
             }
+        File outputDir = new File(project.getBuild().getOutputDirectory());
+        if (!outputDir.exists()) {
+            outputDir.mkdirs();
+        }
+        File javaTXCompilerPath = new File(javaTXCompilerLocation);
+        if(!javaTXCompilerPath.isFile()){
+            throw new MojoExecutionException("The Java-TX Compiler Path is not correct");
+        }
 
-            getLog().info("Project Path:" + dir);
+        try {
+            compile(compileSourceRoots, mavenDependencies, outputDir, javaTXCompilerPath);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static void compile(List<File> compileSourceRoots, List<File> dependencies, File outputDir, File javaTXCompilerLocation) throws IOException {
+        try {
+            var javaFiles = CompilerMojo.getAllJavaFiles(compileSourceRoots);
+            var javFiles = CompilerMojo.getAllJavaTXFiles(compileSourceRoots);
+
+
+            System.out.println(dependencies);
 
             Map<File, Set<Dependency>> javDependenciesMap = new HashMap<>();
 
             for (File file : javFiles) {
-                var a = JavaTXDependencyResolver.getDependenciesForJavaTXFile(file, compileSourceRoots, compileSourceRoots);
+                var a = JavaTXDependencyResolver.getDependenciesForJavaTXFile(file, javaFiles, javFiles, compileSourceRoots);
                 javDependenciesMap.put(new JavaTXSourceFile(file.getAbsoluteFile()), a);
             }
 
@@ -67,11 +116,13 @@ public class CompilerMojo extends AbstractMojo {
             solver.add(new ReflectionTypeSolver()); // JDK classes
             solver.add(new JavaParserTypeSolver(compileSourceRoots.getFirst())); //Java Files
             solver.add(new JavaTXTypeSolver(compileSourceRoots.getFirst())); //Jav Files
-
+            for (var dep : dependencies) {
+                solver.add(new JarTypeSolver(dep)); //add maven dependencies
+            }
 
             Map<File, Set<Dependency>> dependenciesMap = new HashMap<>();
 
-            for (File file: files){
+            for (File file : javaFiles) {
                 dependenciesMap.put(new JavaSourceFile(file.getAbsoluteFile()), JavaDependencyResolver.getAllDependenciesForJavaFile(file, solver));
             }
             dependenciesMap.putAll(javDependenciesMap);
@@ -79,51 +130,104 @@ public class CompilerMojo extends AbstractMojo {
 
             var graph = Utils.buildDependencyGraph(dependenciesMap);
 
-            var compilationSteps = Utils.generateCompilationStepsFromDependencyGraph(graph);
+            System.out.println(Utils.exportGraphToDot(graph));
 
-            for(CompilationStep step : compilationSteps) {
-                if (step instanceof JavacCompilationStep(Set<File> toCompile, List<File> classpath)) {
-                    getLog().info("compiling: " + toCompile + " ...");
-                List<File> cp = List.of(
-                        new File(project.getBuild().getOutputDirectory()));
-                    CompilationHelper.compileJavaSources(toCompile.stream().toList(),
-                            new File(project.getBuild().getOutputDirectory()),
-                            cp);
-                } else if (step instanceof JavaTXCompilationStep(Set<File> toCompile, List<File> classpath)) {
-                    getLog().info("compiling: " + toCompile + " ...");
-                    List<File> cp = List.of(
-                            new File(project.getBuild().getOutputDirectory()));
-                    CompilationHelper.compileJavaTXSources(new File(javaTXCompilerLocation),
-                            toCompile.stream().toList(),
-                            new File(project.getBuild().getOutputDirectory()),
-                            cp, getLog());
+            TarjanSCC tarjan = new TarjanSCC(graph);
+            var sccs = tarjan.run();
+            for (Set<File> scc : sccs) {
+                System.out.println("SCC: " + scc);
+            }
+
+           if(!Utils.checkForCycles(sccs)){
+               System.exit(1);
+            }
+
+            Map<File, Integer> sccIndex = new HashMap<>();
+            for (int i = 0; i < sccs.size(); i++) {
+                for (File f : sccs.get(i)) {
+                    sccIndex.put(f, i);
                 }
             }
 
-            getLog().info(compilationSteps.toString());
+            Map<Integer, Set<Integer>> sccGraph = new HashMap<>();
 
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        } catch (InterruptedException e) {
-            throw new RuntimeException(e);
+            for (int i = 0; i < sccs.size(); i++) {
+                sccGraph.put(i, new HashSet<>());
+            }
+
+            for (File u : graph.vertexSet()) {
+                int uScc = sccIndex.get(u);
+
+                for (LabeledEdge e : graph.outgoingEdgesOf(u)) {
+                    File v = graph.getEdgeTarget(e);
+                    int vScc = sccIndex.get(v);
+
+                    if (uScc != vScc) {
+                        // Reverse the edge for compilation DAG:
+                        // dependency -> dependent
+                        sccGraph.get(vScc).add(uScc);
+                    }
+                }
+            }
+
+            var a = Utils.convertSccGraphToJGraphT(sccGraph);
+
+            System.out.println(Utils.exportSccGraphWithFileLabels(a, sccs));
+
+            List<Integer> topoOrder = Utils.topoSort(sccGraph);
+
+            List<List<File>> compilationOrder = new ArrayList<>();
+
+            for (int sccId : topoOrder) {
+                compilationOrder.add(new ArrayList<>(sccs.get(sccId)));
+            }
+
+            System.out.println(compilationOrder);
+
+            List<? extends CompilationStep> compilationSteps = compilationOrder.stream().map(x -> x.getFirst() instanceof JavaTXSourceFile ? new JavaTXCompilationStep(new HashSet<>(x), null) : new JavacCompilationStep(new HashSet<>(x), null)).toList();
+
+            for(CompilationStep step : compilationSteps) {
+                if (step instanceof JavacCompilationStep(Set<File> toCompile, List<File> _)) {
+                    CompilationHelper.compileJavaSources(toCompile.stream().toList(),
+                            outputDir,
+                            dependencies);
+                } else if (step instanceof JavaTXCompilationStep(Set<File> toCompile, List<File> _)) {
+                    CompilationHelper.compileJavaTXSources(javaTXCompilerLocation,
+                            toCompile.stream().toList(),
+                            outputDir,
+                            dependencies);
+                }
+            }
+        }
+        catch(Exception e){
+            e.printStackTrace();
         }
     }
 
 
-    public static List<JavaTXSourceFile> getAllJavaTXFiles(File rootDir){
-        String[] javaFilePaths = Utils.getFilePathsInDirectory(rootDir, new String[] { "**/*.jav" }, new String[] { });
-        return Arrays.stream(javaFilePaths)
-                .map(f -> new JavaTXSourceFile(rootDir, f))
-                .toList();
+    public static List<JavaTXSourceFile> getAllJavaTXFiles(List<File> rootDirs){
+        List<JavaTXSourceFile> javatxSourceFiles = new ArrayList<>();
+        for(var dir : rootDirs){
+            String[] javaFilePaths = Utils.getFilePathsInDirectory(dir, new String[] { "**/*.jav" }, new String[] { });
+            javatxSourceFiles.addAll(Arrays.stream(javaFilePaths)
+                    .map(f -> new JavaTXSourceFile(dir, f))
+                    .toList());
+        }
+        return javatxSourceFiles;
     }
 
-    public static List<JavaSourceFile> getAllJavaFiles(File rootDir){
-        String[] javaFilePaths = Utils.getFilePathsInDirectory(rootDir, new String[] { "**/*.java" }, new String[] { });
-        return Arrays.stream(javaFilePaths)
-                .map(f -> new JavaSourceFile(rootDir, f))
-                .toList();
+    public static List<JavaSourceFile> getAllJavaFiles(List<File> rootDirs){
+        List<JavaSourceFile> javaSourceFiles = new ArrayList<>();
+        for(var dir : rootDirs){
+            String[] javaFilePaths = Utils.getFilePathsInDirectory(dir, new String[] { "**/*.java" }, new String[] { });
+            javaSourceFiles.addAll(Arrays.stream(javaFilePaths)
+                    .map(f -> new JavaSourceFile(dir, f))
+                    .toList());
+        }
+        return  javaSourceFiles;
     }
 
+
 //    public void buildDependencyGraph(List<File> baseDirs) throws IOException {
 //
 //        //currently only supports one base dir

src/main/java/de/dhbwstuttgart/utils/CompilationHelper.java

@@ -10,6 +10,7 @@ import java.io.File;
 import java.io.IOException;
 import java.util.List;
 import java.util.ArrayList;
+import java.util.stream.Collectors;
 
 public class CompilationHelper {
   public static void compileJavaSources(List<File> sourceFiles, File outputDir, List<File> classpathFiles) throws IOException {
@@ -29,15 +30,13 @@ public class CompilationHelper {
 
         // Build classpath string from File objects
         if (classpathFiles != null && !classpathFiles.isEmpty()) {
-            StringBuilder cp = new StringBuilder();
-            for (int i = 0; i < classpathFiles.size(); i++) {
-                cp.append(classpathFiles.get(i).getAbsolutePath());
-                if (i < classpathFiles.size() - 1) {
-                    cp.append(File.pathSeparator);
-                }
-            }
+
+            String classpath = classpathFiles.stream()
+                    .map(File::getAbsolutePath)
+                    .collect(Collectors.joining(File.pathSeparator));
+
             options.add("-classpath");
-            options.add(cp.toString());
+            options.add(classpath);
         }
 
         JavaCompiler.CompilationTask task = compiler.getTask(
@@ -55,7 +54,7 @@ public class CompilationHelper {
         }
     }
 }
-public static void compileJavaTXSources(File compilerLocation, List<File> sourceFiles, File outputDir, List<File> classpathFiles, Log log) throws IOException, InterruptedException {
+public static void compileJavaTXSources(File compilerLocation, List<File> sourceFiles, File outputDir, List<File> classpathFiles) throws IOException, InterruptedException {
     // JavaTX compilation logic can be similar to Java compilation
     List<String> command = new java.util.ArrayList<>();
     command.add("java");
@@ -64,14 +63,17 @@ public static void compileJavaTXSources(File compilerLocation, List<File> source
     for(File sourceFile : sourceFiles) {
         command.add(sourceFile.getAbsolutePath());
     }
-    command.add("-cp");
-    for (var file : classpathFiles) {
-        command.add(file.getAbsolutePath());
+    if(!classpathFiles.isEmpty()) {
+        command.add("-cp");
+        String classpath = classpathFiles.stream()
+            .map(File::getAbsolutePath)
+            .collect(Collectors.joining(File.pathSeparator));
+        command.add(classpath);
     }
     command.add("-d");
     command.add(outputDir.getAbsolutePath());
 
-    log.info("Compiling JavaTX sources with command: " + String.join(" ", command));
+    System.out.println("Compiling JavaTX sources with command: " + String.join(" ", command));
 
     ProcessBuilder processBuilder = new ProcessBuilder(command);
     processBuilder.inheritIO();

src/main/java/de/dhbwstuttgart/utils/CyclicDependencyException.java

@@ -0,0 +1,7 @@
+package de.dhbwstuttgart.utils;
+
+public class CyclicDependencyException extends RuntimeException {
+    public CyclicDependencyException(String message) {
+        super(message);
+    }
+}

src/main/java/de/dhbwstuttgart/utils/TarjanSCC.java

@@ -0,0 +1,73 @@
+package de.dhbwstuttgart.utils;
+
+import org.jgrapht.Graph;
+
+import java.io.File;
+import java.util.*;
+
+public class TarjanSCC {
+
+    private final Graph<File, LabeledEdge> graph;
+
+    private Map<File, Integer> indexMap = new HashMap<>();
+    private Map<File, Integer> lowlinkMap = new HashMap<>();
+    private Deque<File> stack = new ArrayDeque<>();
+    private Set<File> onStack = new HashSet<>();
+    private int index = 0;
+
+    private final List<Set<File>> stronglyConnectedComponents = new ArrayList<>();
+
+    public TarjanSCC(Graph<File, LabeledEdge> graph) {
+        this.graph = graph;
+    }
+
+    /** Run the algorithm */
+    public List<Set<File>> run() {
+        for (File v : graph.vertexSet()) {
+            if (!indexMap.containsKey(v)) {
+                strongConnect(v);
+            }
+        }
+
+        //
+        return stronglyConnectedComponents;
+    }
+
+    /** Recursive Tarjan DFS step */
+    private void strongConnect(File v) {
+
+        indexMap.put(v, index);
+        lowlinkMap.put(v, index);
+        index++;
+        stack.push(v);
+        onStack.add(v);
+
+        // Consider successors
+        for (LabeledEdge e : graph.outgoingEdgesOf(v)) {
+            File w = graph.getEdgeTarget(e);
+
+            if (!indexMap.containsKey(w)) {
+                // Successor w not yet visited
+                strongConnect(w);
+                lowlinkMap.put(v, Math.min(lowlinkMap.get(v), lowlinkMap.get(w)));
+            }
+            else if (onStack.contains(w)) {
+                // Successor w is in the stack -> part of current SCC
+                lowlinkMap.put(v, Math.min(lowlinkMap.get(v), indexMap.get(w)));
+            }
+        }
+
+        // If v is the root of an SCC
+        if (Objects.equals(lowlinkMap.get(v), indexMap.get(v))) {
+            Set<File> scc = new HashSet<>();
+            File w;
+            do {
+                w = stack.pop();
+                onStack.remove(w);
+                scc.add(w);
+            } while (!w.equals(v));
+
+            stronglyConnectedComponents.add(scc);
+        }
+    }
+}

src/main/java/de/dhbwstuttgart/utils/Utils.java

@@ -10,14 +10,13 @@ import org.codehaus.plexus.util.DirectoryScanner;
 import org.jgrapht.Graph;
 import org.jgrapht.alg.util.Pair;
 import org.jgrapht.graph.AbstractBaseGraph;
+import org.jgrapht.graph.DefaultDirectedGraph;
+import org.jgrapht.graph.DefaultEdge;
 import org.jgrapht.graph.DirectedMultigraph;
 import org.jgrapht.nio.DefaultAttribute;
 import org.jgrapht.nio.dot.DOTExporter;
 
-import java.io.File;
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.Writer;
+import java.io.*;
 import java.util.*;
 import java.util.stream.Collectors;
 
@@ -45,34 +44,74 @@ public class Utils {
                 if (!graph.containsVertex(dependency.location())) {
                     graph.addVertex(dependency.location());
                 }
-                System.out.println(dependency.clazzPath().getPackagePathAsString());
-                System.out.println(dependency.clazzPath().getAbsoluteName());
                 try{
                     graph.addEdge(file, dependency.location(), new LabeledEdge(dependency.clazzPath().getAbsoluteName()));
                 }
                 catch(Exception e){
-                    System.out.println();
+                    System.err.println("Error adding edge from " + file.getAbsolutePath() + " to " + dependency.location().getAbsolutePath() + ": " + e.getMessage());
                 }
             }
         }
         return graph;
     }
 
-    public static void exportGraphToDotFile(Graph<File, LabeledEdge> graph, File outputFile) throws IOException {
-        DOTExporter<File, LabeledEdge> exporter = new DOTExporter<>();
-        exporter.setVertexIdProvider(file -> "\"" + file.getName() + "\"");
-        exporter.setEdgeAttributeProvider(e -> Map.of("label", DefaultAttribute.createAttribute(e.getLabel())));
+    public static <E> String exportGraphToDot(Graph<File, E> graph) {
+
+        DOTExporter<File, E> exporter = new DOTExporter<>(
+                file -> file.getName().replaceAll("[^A-Za-z0-9_]", "_") // DOT-safe ID
+        );
+
         exporter.setVertexAttributeProvider(file -> Map.of(
                 "label", DefaultAttribute.createAttribute(file.getName())
         ));
 
-        try (Writer writer = new FileWriter(outputFile)) {
-            exporter.exportGraph(graph, writer);
-        }
+        StringWriter writer = new StringWriter();
+        exporter.exportGraph(graph, writer);
+        return writer.toString();
     }
 
+    public static List<CompilationStep> simplify(List<CompilationStep> steps){
+        List<CompilationStep> simplifiedSteps = new ArrayList<>();
+        CompilationStep previousStep = null;
+        boolean addedTwo = false;
+        for(int idx = 0; idx < steps.size(); idx++){
+            //first step
+            if (previousStep == null){
+                previousStep = steps.get(idx);
+                continue;
+            }
 
-    public static List<CompilationStep> generateCompilationStepsFromDependencyGraph(Graph<File, LabeledEdge> originalGraph) throws IOException {
+            CompilationStep thisStep = steps.get(idx);
+
+            if (previousStep instanceof JavaTXCompilationStep prev && thisStep instanceof JavaTXCompilationStep thiz){
+                Set<File> combined = new HashSet<>(prev.toCompile());
+                combined.addAll(thiz.toCompile());
+
+                simplifiedSteps.removeLast(); //remove previous step and combine the two
+                thisStep = new JavaTXCompilationStep(combined, null);
+                simplifiedSteps.add(thisStep);
+            }
+            else if(previousStep instanceof JavacCompilationStep prev && thisStep instanceof JavacCompilationStep thiz){
+                Set<File> combined = new HashSet<>(prev.toCompile());
+                combined.addAll(thiz.toCompile());
+
+                simplifiedSteps.removeLast(); //remove previous step and combine the two
+                thisStep = new JavacCompilationStep(combined, null);
+                simplifiedSteps.add(thisStep);
+            }
+            else{
+                simplifiedSteps.add(previousStep);
+                if(idx == steps.size() - 1){
+                    simplifiedSteps.add(thisStep);
+                }
+            }
+            previousStep = thisStep;
+
+        }
+        return simplifiedSteps;
+    }
+
+    public static List<CompilationStep> generateCompilationStepsFromDependencyGraph(Graph<File, LabeledEdge> originalGraph) throws IOException, CyclicDependencyException {
         Graph<File, LabeledEdge> graph = (Graph<File, LabeledEdge>) ((AbstractBaseGraph<File, LabeledEdge>) originalGraph).clone();
         List<CompilationStep> steps = new ArrayList<>();
         while (!graph.vertexSet().isEmpty()) {
@@ -93,14 +132,62 @@ public class Utils {
 
             if (amoutOfVertices == graph.vertexSet().size()) {
                 // cannot remove any more vertices, so we probably have a cyclic dependency
-                System.out.println("Cyclic dependency detected, stopping compilation steps generation.");
-                Utils.exportGraphToDotFile(graph, new File("cyclic_dependency_graph.dot"));
-                break;
+                throw new CyclicDependencyException("Cyclic dependency between Java and Java-TX files detected, stopping compilation steps generation.");
             }
         }
-        return steps;
+
+
+        return simplify(steps);
     }
 
+    public static Graph<Integer,DefaultEdge> convertSccGraphToJGraphT(
+            Map<Integer, Set<Integer>> sccGraph
+    ) {
+        // Create a directed graph with default edges
+        Graph<Integer,DefaultEdge> g = new DefaultDirectedGraph<>(DefaultEdge.class);
+
+        // Add vertices
+        for (Integer sccId : sccGraph.keySet()) {
+            g.addVertex(sccId);
+        }
+
+        // Add edges
+        for (Map.Entry<Integer, Set<Integer>> entry : sccGraph.entrySet()) {
+            Integer src = entry.getKey();
+            for (Integer dst : entry.getValue()) {
+                g.addEdge(src, dst);
+            }
+        }
+
+        return g;
+    }
+
+    public static String exportSccGraphWithFileLabels(
+            Graph<Integer, DefaultEdge> sccGraph,
+            List<Set<File>> sccs
+    ) {
+        DOTExporter<Integer, DefaultEdge> exporter = new DOTExporter<>(Object::toString);
+
+        // Label each vertex with the files in the SCC
+        exporter.setVertexAttributeProvider(sccId -> {
+            Set<File> files = sccs.get(sccId);
+            String label = files.stream()
+                    .map(File::getName)
+                    .collect(Collectors.joining("\\n")); // newline in DOT
+            return Map.of("label", DefaultAttribute.createAttribute(label));
+        });
+
+        // Optional: label edges
+        exporter.setEdgeAttributeProvider(e -> Map.of(
+                "label", DefaultAttribute.createAttribute(e.toString())
+        ));
+
+        StringWriter writer = new StringWriter();
+        exporter.exportGraph(sccGraph, writer);
+        return writer.toString();
+    }
+
+
     public static <T extends File> Set<File> getTransitiveDependentFilesOfType(Class<T> type, Graph<File, LabeledEdge> graph, Set<File> potentialVerticesInThisStep, Set<File> potentialFilesInCycle) {
 
         //initial call
@@ -171,4 +258,45 @@ public class Utils {
                 .map(graph::getEdgeTarget)
                 .allMatch(type::isInstance);
     }
+
+    public static boolean checkForCycles(List<Set<File>> sccs) {
+        for(var scc : sccs){
+            boolean allSameType = scc.stream().map(Object::getClass).distinct().count() <= 1;
+            if (!allSameType) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static List<Integer> topoSort(Map<Integer, Set<Integer>> graph) {
+        Set<Integer> visited = new HashSet<>();
+        Set<Integer> temp = new HashSet<>();
+        List<Integer> order = new ArrayList<>();
+
+        for (int node : graph.keySet()) {
+            if (!visited.contains(node)) {
+                dfs(node, graph, visited, temp, order);
+            }
+        }
+        Collections.reverse(order);
+        return order;
+    }
+
+    static void dfs(int u, Map<Integer, Set<Integer>> graph,
+             Set<Integer> visited, Set<Integer> temp, List<Integer> order) {
+
+        if (temp.contains(u))
+            throw new IllegalStateException("Graph is not a DAG (should not happen after SCCs)");
+
+        if (!visited.contains(u)) {
+            temp.add(u);
+            for (int v : graph.get(u)) {
+                dfs(v, graph, visited, temp, order);
+            }
+            temp.remove(u);
+            visited.add(u);
+            order.add(u);
+        }
+    }
 }

src/main/resources/META-INF/maven/lifecycle.xml

@@ -0,0 +1,13 @@
+<lifecycles>
+    <lifecycle>
+        <id>default</id>
+        <phases>
+            <phase>
+                <id>compile</id>
+                <goal>
+                    <plugin>de.dhbwstuttgart:javatx-compiler-plugin:compile-javatx</plugin>
+                </goal>
+            </phase>
+        </phases>
+    </lifecycle>
+</lifecycles>

target/classes/META-INF/maven/de.dhbwstuttgart/javatx-compiler-plugin/plugin-help.xml

@@ -8,10 +8,11 @@
   <groupId>de.dhbwstuttgart</groupId>
   <artifactId>javatx-compiler-plugin</artifactId>
   <version>1.0-SNAPSHOT</version>
-  <goalPrefix>javatx-compiler</goalPrefix>
+  <goalPrefix>javatx-compiler-plugin</goalPrefix>
   <mojos>
     <mojo>
-      <goal>compile javatx project</goal>
+      <goal>compile-javatx</goal>
+      <requiresDependencyResolution>compile+runtime</requiresDependencyResolution>
       <requiresDirectInvocation>false</requiresDirectInvocation>
       <requiresProject>true</requiresProject>
       <requiresReports>false</requiresReports>

target/classes/META-INF/maven/plugin.xml

@@ -8,14 +8,15 @@
   <groupId>de.dhbwstuttgart</groupId>
   <artifactId>javatx-compiler-plugin</artifactId>
   <version>1.0-SNAPSHOT</version>
-  <goalPrefix>javatx-compiler</goalPrefix>
+  <goalPrefix>javatx-compiler-plugin</goalPrefix>
   <isolatedRealm>false</isolatedRealm>
   <inheritedByDefault>true</inheritedByDefault>
   <requiredJavaVersion>23</requiredJavaVersion>
   <requiredMavenVersion>3.9.9</requiredMavenVersion>
   <mojos>
     <mojo>
-      <goal>compile javatx project</goal>
+      <goal>compile-javatx</goal>
+      <requiresDependencyResolution>compile+runtime</requiresDependencyResolution>
       <requiresDirectInvocation>false</requiresDirectInvocation>
       <requiresProject>true</requiresProject>
       <requiresReports>false</requiresReports>

target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst

@@ -306,6 +306,7 @@ de/dhbwstuttgart/parser/antlr/JavaTXParser$BitwiseorexpressionContext.class
 de/dhbwstuttgart/parser/antlr/JavaParser$NonWildcardTypeArgumentsContext.class
 de/dhbwstuttgart/parser/antlr/JavaParser$MethodBodyContext.class
 de/dhbwstuttgart/parser/antlr/JavaParser$ExplicitGenericInvocationSuffixContext.class
+de/dhbwstuttgart/utils/CyclicDependencyException.class
 de/dhbwstuttgart/parser/antlr/JavaParser$ElementValuePairsContext.class
 de/dhbwstuttgart/parser/antlr/JavaTXParser$SwitchExpression2Context.class
 de/dhbwstuttgart/parser/antlr/JavaTXParser$BoolLiteralContext.class
@@ -348,6 +349,7 @@ de/dhbwstuttgart/parser/antlr/JavaTXParser$ConditionalstmtContext.class
 de/dhbwstuttgart/parser/JavaTXDependencyObtainer.class
 de/dhbwstuttgart/parser/antlr/JavaParser$ConstantDeclaratorContext.class
 de/dhbwstuttgart/parser/antlr/JavaParser$InterfaceBodyDeclarationContext.class
+de/dhbwstuttgart/utils/TarjanSCC.class
 de/dhbwstuttgart/parser/antlr/JavaTXParserBaseVisitor.class
 de/dhbwstuttgart/parser/antlr/JavaTXParser$AnnotationTypeBodyContext.class
 de/dhbwstuttgart/parser/antlr/JavaTXParser$RefTypeContext.class

target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst

@@ -1,4 +1,3 @@
-/Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/src/main/java/de/dhbwstuttgart/App.java
 /Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/src/main/java/de/dhbwstuttgart/javaanalyzer/CompilationStep.java
 /Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/src/main/java/de/dhbwstuttgart/javaanalyzer/Dependency.java
 /Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/src/main/java/de/dhbwstuttgart/javaanalyzer/JavaDependencyResolver.java
@@ -16,7 +15,9 @@
 /Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/src/main/java/de/dhbwstuttgart/structure/JavaSourceFile.java
 /Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/src/main/java/de/dhbwstuttgart/structure/JavaTXSourceFile.java
 /Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/src/main/java/de/dhbwstuttgart/utils/CompilationHelper.java
+/Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/src/main/java/de/dhbwstuttgart/utils/CyclicDependencyException.java
 /Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/src/main/java/de/dhbwstuttgart/utils/LabeledEdge.java
+/Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/src/main/java/de/dhbwstuttgart/utils/TarjanSCC.java
 /Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/src/main/java/de/dhbwstuttgart/utils/Utils.java
 /Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/target/generated-sources/antlr4/de/dhbwstuttgart/parser/antlr/JavaLexer.java
 /Users/julianschmidt/dhbw/javatx/JavaTX-Maven-Plugin/javatx-compiler-plugin/target/generated-sources/antlr4/de/dhbwstuttgart/parser/antlr/JavaParser.java

target/plugin-enhanced.xml

@@ -8,14 +8,15 @@
   <groupId>de.dhbwstuttgart</groupId>
   <artifactId>javatx-compiler-plugin</artifactId>
   <version>1.0-SNAPSHOT</version>
-  <goalPrefix>javatx-compiler</goalPrefix>
+  <goalPrefix>javatx-compiler-plugin</goalPrefix>
   <isolatedRealm>false</isolatedRealm>
   <inheritedByDefault>true</inheritedByDefault>
   <requiredJavaVersion>23</requiredJavaVersion>
   <requiredMavenVersion>3.9.9</requiredMavenVersion>
   <mojos>
     <mojo>
-      <goal>compile javatx project</goal>
+      <goal>compile-javatx</goal>
+      <requiresDependencyResolution>compile+runtime</requiresDependencyResolution>
       <requiresDirectInvocation>false</requiresDirectInvocation>
       <requiresProject>true</requiresProject>
       <requiresReports>false</requiresReports>