Add tests for source code gen

Var

.gitignore

@@ -29,3 +29,4 @@ logFiles/**
 
 src/main/java/de/dhbwstuttgart/parser/antlr/
 src/main/java/de/dhbwstuttgart/sat/asp/parser/antlr/
+/pull.sh

src/main/java/de/dhbwstuttgart/bytecode/insertGenerics/FamilyOfGeneratedGenerics.java

@@ -5,6 +5,7 @@ import de.dhbwstuttgart.bytecode.TPHExtractor;
 import de.dhbwstuttgart.bytecode.constraint.TPHConstraint;
 import de.dhbwstuttgart.bytecode.constraint.TPHConstraint.Relation;
 import de.dhbwstuttgart.bytecode.utilities.MethodAndTPH;
+import de.dhbwstuttgart.exceptions.NotImplementedException;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -16,13 +17,15 @@ public class FamilyOfGeneratedGenerics {
     public HashMap<String, PairTphMethod<PositionFinder.Position, String>> posOfTPHs = new HashMap<>();
     public List<ClassConstraint> classConstraints = new ArrayList<>();
     public List<MethodConstraint> methodConstraints = new ArrayList<>();
+    public HashMap<MethodConstraint, String> methodsWithPosition = new HashMap<>();
 
 
     public FamilyOfGeneratedGenerics(TPHExtractor tphExtractor) {
         this.allConstraints = tphExtractor.allCons;
         this.posOfTPHs = positionConverter(tphExtractor.allTPHS, tphExtractor.ListOfMethodsAndTph);
         this.classConstraints = getClassConstraints(allConstraints,posOfTPHs);
-//        this.methodConstraints =
+//        this.methodConstraints = getMethodConstraints(allConstraints,classConstraints,posOfTPHs);
+
     }
 
     public static List<ClassConstraint> getClassConstraints(List<TPHConstraint> cs, HashMap<String, PairTphMethod<PositionFinder.Position, String>> posOfTphs) { //Inputparameter List<TPHConstraint> constraintsSet weg
@@ -48,38 +51,44 @@ public class FamilyOfGeneratedGenerics {
         return cs_cl;
     }
 
-    public static List<MethodConstraint> getMethodConstraints(List<TPHConstraint> cs, List<ClassConstraint> cs_cl, HashMap<String, PairTphMethod<PositionFinder.Position, String>> posOfTphs) {
-        //TODO: Regeln
-        List<MethodConstraint> cs_m = new ArrayList<>();
-        List<MethodConstraint> methodConstraints1 = typeOfTheMethodInClSigma(cs, posOfTphs);
-        for (MethodConstraint cons: methodConstraints1) {
-            if (!checkForDuplicates(cons, cs_m)) {
-                cs_m.add(cons);
-            }
-        }
-        List<MethodConstraint> methodConstraints2 = firstTransitiveSubtypeForMethodTypes(cs, cs_m);
-        for (MethodConstraint cons: methodConstraints2) {
-            if (!checkForDuplicates(cons, cs_m)) {
-                cs_m.add(cons);
-            }
-        }
-        List<MethodConstraint> methodConstraints3 = secondTransitiveSubtypeForMethodTypes(cs, cs_cl, cs_m);
-        for (MethodConstraint cons: methodConstraints3) {
-            if (!checkForDuplicates(cons, cs_m)) {
-                cs_m.add(cons);
-            }
-        }
-        List<MethodConstraint> methodConstraints4 = hasNoSupertypeForMethodTypes(cs, posOfTphs);
-        for (MethodConstraint cons: methodConstraints4) {
-            if (!checkForDuplicates(cons, cs_m)) {
-                cs_m.add(cons);
-            }
-        }
-        List<MethodConstraint> methodConstraints5 = methodTypesWithoutClassTypes(cs_cl, cs_m);
-        cs_m = methodConstraints5;
-        return cs_m;
+//    public static List<MethodConstraint> getMethodConstraints(List<TPHConstraint> cs, List<ClassConstraint> cs_cl, HashMap<String, PairTphMethod<PositionFinder.Position, String>> posOfTphs) {
+//        //TODO: Regeln
+//        List<MethodConstraint> cs_m = new ArrayList<>();
+//        List<MethodConstraint> methodConstraints1 = typeOfTheMethodInClSigma(cs, posOfTphs);
+//        for (MethodConstraint cons: methodConstraints1) {
+//            if (!checkForDuplicates(cons, cs_m)) {
+//                cs_m.add(cons);
+//            }
+//        }
+//        List<MethodConstraint> methodConstraints2 = firstTransitiveSubtypeForMethodTypes(cs, cs_m);
+//        for (MethodConstraint cons: methodConstraints2) {
+//            if (!checkForDuplicates(cons, cs_m)) {
+//                cs_m.add(cons);
+//            }
+//        }
+//        List<MethodConstraint> methodConstraints3 = secondTransitiveSubtypeForMethodTypes(cs, cs_cl, cs_m);
+//        for (MethodConstraint cons: methodConstraints3) {
+//            if (!checkForDuplicates(cons, cs_m)) {
+//                cs_m.add(cons);
+//            }
+//        }
+//        List<MethodConstraint> methodConstraints4 = hasNoSupertypeForMethodTypes(cs, posOfTphs);
+//        for (MethodConstraint cons: methodConstraints4) {
+//            if (!checkForDuplicates(cons, cs_m)) {
+//                cs_m.add(cons);
+//            }
+//        }
+//        List<MethodConstraint> methodConstraints5 = methodTypesWithoutClassTypes(cs_cl, cs_m);
+//        cs_m = methodConstraints5;
+//        return cs_m;
+//    }
+
+    public static HashMap<MethodConstraint, String> getMethodConstraints(List<TPHConstraint> cs, List<ClassConstraint> cs_cl, HashMap<String, PairTphMethod<PositionFinder.Position, String>> posOfTphs) {
+        throw new NotImplementedException();
     }
 
+
+
     /**
      * Def. FGG: erste Zeile von cs_cl
      * {T < .T' | T is a type variable in a type of a node of a field}
@@ -155,16 +164,16 @@ public class FamilyOfGeneratedGenerics {
      * Def. FGG: erste Zeile von cs_m
      * {T < .T' | T is a type variable in a type of the method/constructor m in cl_\sigma, (T <. T') \in cs}
      */
-    public static List<MethodConstraint> typeOfTheMethodInClSigma(List<TPHConstraint> allConstraints, HashMap<String, PairTphMethod<PositionFinder.Position, String>> posOfTphs) { // cl_\sigma??
+    public static HashMap<MethodConstraint, String> typeOfTheMethodInClSigma(List<TPHConstraint> allConstraints, HashMap<String, PairTphMethod<PositionFinder.Position, String>> posOfTphs) { // cl_\sigma??
         //TODO:
-        List<MethodConstraint> tempMC= new ArrayList<>();
+        HashMap<MethodConstraint, String> tempMC= new HashMap<>();
         for(TPHConstraint allCons: allConstraints){
             if(posOfTphs.containsKey(allCons.getLeft()) && allCons.getRight()!=null && allCons.getRel()==Relation.EXTENDS) {
                 for(String tph: posOfTphs.keySet()) {
                     if(tph == allCons.getLeft() && (posOfTphs.get(tph).fst == PositionFinder.Position.METHOD || posOfTphs.get(tph).fst == PositionFinder.Position.CONSTRUCTOR)) {
                         MethodConstraint consToAdd = new MethodConstraint(allCons.getLeft(), allCons.getRight(), allCons.getRel());
-                        if (!checkForDuplicates(consToAdd, tempMC)) {
-                            tempMC.add(consToAdd);
+                        if (!checkForDuplicatesInMethods(consToAdd, tempMC, posOfTphs)) {
+                            tempMC.put(consToAdd, posOfTphs.get(tph).snd);
                         }
                     }
                 }
@@ -174,112 +183,6 @@ public class FamilyOfGeneratedGenerics {
     }
 
 
-    /**
-     * Def. FGG: zweite Zeile von cs_m
-     * {R' <. S | (R <. R'), (S <. S') \in cs_m and (R',S) is in the transitive closure of cs}
-     */
-    public static List<MethodConstraint> firstTransitiveSubtypeForMethodTypes(List<TPHConstraint> allConstraints, List<MethodConstraint> cs_m) { //transitive closure of cs
-        //TODO:
-        List<MethodConstraint> tempMC= new ArrayList<>();
-        List<TPHConstraint> tcOfCs =  buildTransitiveClosure(allConstraints);
-        for(MethodConstraint mC1 : cs_m) {          //(R <. R')
-            for(MethodConstraint mC2 : cs_m) {      //(S <. S')
-                String lSide = mC1.getRight();      //R'
-                String rSide = mC2.getLeft();       //S
-                for(TPHConstraint tphC : tcOfCs) {
-                    if(tphC.getLeft().equals(lSide)&&tphC.getRight().equals(rSide)) { //is it (R',S)
-                        MethodConstraint consToAdd = new MethodConstraint(lSide, rSide, tphC.getRel()); //create (R'<.S)
-                        if (!checkForDuplicates(consToAdd, tempMC)) {
-                            tempMC.add(consToAdd);
-                        }
-                    }
-                }
-            }
-        }
-        return tempMC;
-    }
-
-    /**
-     * Def. FGG: dritte Zeile von cs_m
-     * {R' <. S | (R <. R') \in cs_m, (S <. S') \in cs_cl and (R',S) is in the transitive closure of cs}
-     */
-    public static List<MethodConstraint> secondTransitiveSubtypeForMethodTypes(List<TPHConstraint> allConstraints, List<ClassConstraint> cs_cl, List<MethodConstraint> cs_m) {
-        //TODO:
-        List<MethodConstraint> tempMC= new ArrayList<>();
-        List<TPHConstraint> tcOfCs =  buildTransitiveClosure(allConstraints);
-        for(ClassConstraint cC : cs_cl) {
-            for(MethodConstraint mC : cs_m) {
-                String leftSide = mC.getRight();
-                String rightSide = cC.getLeft();
-                for(TPHConstraint tphC : tcOfCs) {
-                    if(tphC.getLeft().equals(leftSide)&&tphC.getRight().equals(rightSide)) {
-                        MethodConstraint consToAdd = new MethodConstraint(tphC.getLeft(), tphC.getRight(), tphC.getRel());
-                        if (!checkForDuplicates(consToAdd, tempMC)) {
-                            tempMC.add(consToAdd);
-                            System.out.println(consToAdd);
-                        }
-
-                    }
-                }
-            }
-        }
-        return tempMC;
-    }
-
-/**
-     * Def. FGG: vierte Zeile von cs_m
-     * {T <. Object | (T is a type variable in a type of a node of the method/constructor m in cl_\sigma),
-     *                  (\existsnot T': T <. T') \in cs)}
-     */
-    public static List<MethodConstraint> hasNoSupertypeForMethodTypes(List<TPHConstraint> allConstraints, HashMap<String, PairTphMethod<PositionFinder.Position, String>> posOfTphs) {
-        //TODO:
-        List<MethodConstraint> tempMC= new ArrayList<>();
-        for(String tph: posOfTphs.keySet()) {
-            for(TPHConstraint allCons: allConstraints) {
-                if((posOfTphs.get(tph).fst.equals(PositionFinder.Position.METHOD) || posOfTphs.get(tph).fst.equals(PositionFinder.Position.CONSTRUCTOR)) && checkUpperBound(allConstraints,tph)) {
-                    MethodConstraint consToAdd = new MethodConstraint(tph, "Object", Relation.EXTENDS);
-                    if (!checkForDuplicates(consToAdd, tempMC)) {
-                        tempMC.add(consToAdd);
-                        System.out.println(consToAdd);
-                    }
-                }
-            }
-        }
-        return tempMC;
-    }
-
-/**
-     * nimm die Menge cs_cl aus cs_m raus
-     */
-    public static List<MethodConstraint> methodTypesWithoutClassTypes(List<ClassConstraint> cs_cl, List<MethodConstraint> cs_m) {
-        //TODO:
-        List<TPHConstraint> tempCC = new ArrayList<>();
-        for(ClassConstraint cc: cs_cl) {
-            TPHConstraint tphC = new TPHConstraint(cc.getLeft(), cc.getRight(), cc.getRel());
-            tempCC.add(tphC);
-        }
-        List<TPHConstraint> tempMC = new ArrayList<>();
-        for(MethodConstraint mc: cs_m) {
-            TPHConstraint tphC = new TPHConstraint(mc.getLeft(), mc.getRight(), mc.getRel());
-            tempMC.add(tphC);
-        }
-        List<TPHConstraint> tempMC2 = new ArrayList<>();
-        tempMC2.addAll(tempMC);
-        List<MethodConstraint> tempMCToReturn = new ArrayList<>();
-
-        for(TPHConstraint cc: tempCC) {
-            for(TPHConstraint mc: tempMC) {
-                if(cc.getLeft().equals(mc.getLeft()) && cc.getRight().equals(mc.getRight())) {
-                    tempMC2.remove(mc);
-                }
-            }
-        }
-        for(TPHConstraint tphC: tempMC2) {
-            MethodConstraint mCons = new MethodConstraint(tphC.getLeft(), tphC.getRight(), tphC.getRel());
-            tempMCToReturn.add(mCons);
-        }
-        return tempMCToReturn;
-    }
 
     public static boolean checkForDuplicates(TPHConstraint constraint, List list) {
         List<TPHConstraint> tempList = list;
@@ -294,6 +197,10 @@ public class FamilyOfGeneratedGenerics {
         return false;
     }
 
+    public static boolean checkForDuplicatesInMethods(TPHConstraint constraint, HashMap<MethodConstraint, String> hashMap, HashMap<String, PairTphMethod<PositionFinder.Position, String>> posOfTphs) {
+        throw new NotImplementedException();
+    }
+
     public static List<TPHConstraint> buildTransitiveClosure(List list) {
         List<TPHConstraint> iterList = new ArrayList<>(list);
         List<TPHConstraint> runList = new ArrayList<>(list);

src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java

@@ -1,7 +1,25 @@
 //PL 2018-12-19: typeInferenceOld nach typeInference uebertragen
 package de.dhbwstuttgart.core;
 
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.Writer;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
 import com.google.common.collect.Lists;
+
 import de.dhbwstuttgart.bytecode.BytecodeGen;
 import de.dhbwstuttgart.bytecode.Exception.BytecodeGeneratorError;
 import de.dhbwstuttgart.bytecode.genericsGenerator.GeneratedGenericsFinder;
@@ -11,21 +29,19 @@ import de.dhbwstuttgart.environment.DirectoryClassLoader;
 import de.dhbwstuttgart.exceptions.DebugException;
 import de.dhbwstuttgart.parser.JavaTXParser;
 import de.dhbwstuttgart.parser.NullToken;
-import de.dhbwstuttgart.parser.scope.GenericsRegistry;
 import de.dhbwstuttgart.parser.SyntaxTreeGenerator.SyntaxTreeGenerator;
 import de.dhbwstuttgart.parser.antlr.Java8Parser.CompilationUnitContext;
+import de.dhbwstuttgart.parser.scope.GenericsRegistry;
 import de.dhbwstuttgart.parser.scope.JavaClassName;
 import de.dhbwstuttgart.syntaxtree.ClassOrInterface;
+import de.dhbwstuttgart.syntaxtree.FormalParameter;
+import de.dhbwstuttgart.syntaxtree.GenericDeclarationList;
 import de.dhbwstuttgart.syntaxtree.GenericTypeVar;
 import de.dhbwstuttgart.syntaxtree.Method;
 import de.dhbwstuttgart.syntaxtree.ParameterList;
 import de.dhbwstuttgart.syntaxtree.SourceFile;
-import de.dhbwstuttgart.syntaxtree.TypeScope;
-import de.dhbwstuttgart.syntaxtree.FormalParameter;
-import de.dhbwstuttgart.syntaxtree.GenericDeclarationList;
 import de.dhbwstuttgart.syntaxtree.factory.ASTFactory;
 import de.dhbwstuttgart.syntaxtree.factory.UnifyTypeFactory;
-import de.dhbwstuttgart.syntaxtree.statement.Block;
 import de.dhbwstuttgart.syntaxtree.type.ExtendsWildcardType;
 import de.dhbwstuttgart.syntaxtree.type.GenericRefType;
 import de.dhbwstuttgart.syntaxtree.type.RefType;
@@ -41,32 +57,17 @@ import de.dhbwstuttgart.typeinference.result.ResultSet;
 import de.dhbwstuttgart.typeinference.typeAlgo.TYPE;
 import de.dhbwstuttgart.typeinference.unify.RuleSet;
 import de.dhbwstuttgart.typeinference.unify.TypeUnify;
+import de.dhbwstuttgart.typeinference.unify.TypeUnifyTask;
+import de.dhbwstuttgart.typeinference.unify.UnifyResultListener;
+import de.dhbwstuttgart.typeinference.unify.UnifyResultListenerImpl;
+import de.dhbwstuttgart.typeinference.unify.UnifyResultModel;
+import de.dhbwstuttgart.typeinference.unify.UnifyTaskModel;
 import de.dhbwstuttgart.typeinference.unify.distributeVariance;
 import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
 import de.dhbwstuttgart.typeinference.unify.model.PairOperator;
 import de.dhbwstuttgart.typeinference.unify.model.PlaceholderType;
 import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
 import de.dhbwstuttgart.typeinference.unify.model.UnifyType;
-import de.dhbwstuttgart.typeinference.unify.TypeUnifyTask;
-import de.dhbwstuttgart.typeinference.unify.UnifyResultListener;
-import de.dhbwstuttgart.typeinference.unify.UnifyResultListenerImpl;
-import de.dhbwstuttgart.typeinference.unify.UnifyResultModel;
-import de.dhbwstuttgart.typeinference.unify.UnifyTaskModel;
-
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.Writer;
-import java.io.OutputStreamWriter;
-import java.net.URL;
-import java.net.URLClassLoader;
-import java.util.*;
-import java.util.function.Function;
-import java.util.stream.Collectors;
-
-import org.antlr.v4.runtime.Token;
-import org.apache.commons.io.output.NullOutputStream;
 
 
 public class JavaTXCompiler {
@@ -74,12 +75,13 @@ public class JavaTXCompiler {
 	//public static JavaTXCompiler INSTANCE;
     final CompilationEnvironment environment;
 	Boolean resultmodel = true;
+	// TODO change the AST for replace generics with TPH
     public final Map<File, SourceFile> sourceFiles = new HashMap<>();
     Boolean log = true; //gibt an ob ein Log-File nach System.getProperty("user.dir")+"src/test/java/logFiles" geschrieben werden soll?
     public volatile UnifyTaskModel usedTasks = new UnifyTaskModel();
     private final ClassLoader classLoader;
 
-	public JavaTXCompiler(File sourceFile) throws IOException, ClassNotFoundException {
+	public JavaTXCompiler (File... sourceFile) throws IOException, ClassNotFoundException {
 		this(Arrays.asList(sourceFile), null);
 	}
     public JavaTXCompiler(File sourceFile, Boolean log) throws IOException, ClassNotFoundException {
@@ -102,6 +104,10 @@ public class JavaTXCompiler {
         //INSTANCE = this;
     }
 
+	public Map<File, SourceFile> getSourceFiles () {
+		return sourceFiles;
+	}
+
     public ConstraintSet<Pair> getConstraints() throws ClassNotFoundException, IOException {
         List<ClassOrInterface> allClasses = new ArrayList<>();//environment.getAllAvailableClasses();
         List<ClassOrInterface> importedClasses = new ArrayList<>();
@@ -120,11 +126,11 @@ public class JavaTXCompiler {
 				importedClasses.add(importedClass);
 			}
         }
-        for (File f : this.sourceFiles.keySet()) {
+		for (File f : this.sourceFiles.keySet()) {
 			SourceFile sf = sourceFiles.get(f);
 			sf = new SourceFile(sf.getPkgName(),
 					       sf.KlassenVektor.stream()
-										   .map(cl -> new ClassOrInterface(cl))
+							.map(ClassOrInterface::new)
 							               .collect(Collectors.toCollection(ArrayList::new)),
 						   sf.imports);
 			//sf enthaelt neues Source-File, neue Klassen-Objekte und neue 
@@ -609,7 +615,7 @@ public class JavaTXCompiler {
 					});
 
 			Set<String> constructorParaTypeVarNames = allClasses.stream().map(x -> x.getConstructors().stream()
-					.map(y -> y.getParameterList().getFormalparalist().stream()
+					.filter(y -> y != null).map(y -> y.getParameterList().getFormalparalist().stream()
 							.filter(z -> z.getType() instanceof TypePlaceholder)
 							.map(z -> ((TypePlaceholder) z.getType()).getName())
 							.collect(Collectors.toCollection(HashSet::new)))

src/main/java/de/dhbwstuttgart/inferWildcards/ConstraintsGenerationUtils.java

@@ -0,0 +1,132 @@
+package de.dhbwstuttgart.inferWildcards;
+
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import de.dhbwstuttgart.parser.NullToken;
+import de.dhbwstuttgart.syntaxtree.type.ExtendsWildcardType;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.SuperWildcardType;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.typeinference.constraints.Constraint;
+import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
+import de.dhbwstuttgart.typeinference.constraints.Pair;
+import de.dhbwstuttgart.typeinference.unify.model.PairOperator;
+
+/**
+ * Utilities to generate the constraints for the infer wildcards algorithm.
+ * 
+ * @author Till Schnell
+ * @version 1.0
+ */
+public final class ConstraintsGenerationUtils
+{
+
+	private ConstraintsGenerationUtils () {
+		throw new AssertionError("No ConstraintsGenerationUtils instance for you");
+	}
+
+	/**
+	 * Generate the constraints for a map of type placeholder and RefType and merge
+	 * these to the already provided constraints.
+	 * 
+	 * @param tphMap      {@link Map} of {@link TypePlaceholder} and
+	 *                    {@link RefTypeOrTPHOrWildcardOrGeneric}
+	 * @param constraints {@link ConstraintSet} over {@link Pair} to merge to
+	 * @return The same instance {@code constraints} provided including the merged
+	 *         constraints
+	 */
+	public static ConstraintSet<Pair> generateAndMergeConstraints (
+			Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphMap,
+			ConstraintSet<Pair> constraints) {
+		ConstraintSet<Pair> generateConstraints = ConstraintsGenerationUtils.generateConstraints(tphMap);
+		constraints.addAll(generateConstraints);
+		return constraints;
+	}
+
+	/**
+	 * Generate the constraints for a map of type placeholder and RefType.
+	 * 
+	 * @param tphMap {@link Map} of {@link TypePlaceholder} and
+	 *               {@link RefTypeOrTPHOrWildcardOrGeneric}
+	 * @return {@link ConstraintSet} of {@link Pair} containing the constraints to
+	 *         infer the matching wildcard type.
+	 */
+	public static ConstraintSet<Pair> generateConstraints (
+			Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphMap) {
+		return tphMap.entrySet().stream().map(ConstraintsGenerationUtils::generateConstraints)
+				.reduce(
+				new ConstraintSet<>(),
+				(cs, c) -> {
+					cs.addAll(c);
+					return cs;
+						});
+	}
+
+	/**
+	 * Generate the constraints for a single RefType type placeholder pair to infer
+	 * the wildcards for the generic parameter type.
+	 * 
+	 * @param tphEntry {@link Entry} of {@link TypePlaceholder} and
+	 *                 {@link RefTypeOrTPHOrWildcardOrGeneric}
+	 * @return {@link ConstraintSet} of {@link Pair} generated containing the
+	 *         constraints.
+	 */
+	private static ConstraintSet<Pair> generateConstraints (
+			Map.Entry<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphEntry) {
+		return generateConstraints(tphEntry.getValue(), tphEntry.getKey());
+	}
+
+	/**
+	 * Generate the constraints for a single RefType type placeholder pair to infer
+	 * the wildcards for the generic parameter type.
+	 * 
+	 * @param refType {@link RefTypeOrTPHOrWildcardOrGeneric}
+	 * @param tph     {@link TypePlaceholder}
+	 * @return {@link ConstraintSet} of {@link Pair} generated containing the
+	 *         constraints.
+	 */
+	public static ConstraintSet<Pair> generateConstraints (RefTypeOrTPHOrWildcardOrGeneric refType,
+			TypePlaceholder tph) {
+		ConstraintSet<Pair> constraintSet = new ConstraintSet<>();
+		Set<Constraint<Pair>> oderConstraints = new HashSet<>();
+		constraintSet.addOderConstraint(oderConstraints);
+
+		// single type
+		ConstraintsGenerationUtils.addToOderConstraint(oderConstraints, tph, refType);
+
+		// extends type
+		ExtendsWildcardType extendsWildcardType = new ExtendsWildcardType(refType, new NullToken());
+		ConstraintsGenerationUtils.addToOderConstraint(oderConstraints, tph, extendsWildcardType);
+
+		// super type
+		SuperWildcardType superWildcardType = new SuperWildcardType(refType, new NullToken());
+		ConstraintsGenerationUtils.addToOderConstraint(oderConstraints, tph, superWildcardType);
+
+		return constraintSet;
+	}
+
+	private static void addToOderConstraint (Set<Constraint<Pair>> oderConstraints, TypePlaceholder tph,
+			RefTypeOrTPHOrWildcardOrGeneric refType) {
+		Constraint<Pair> c = new Constraint<>();
+		oderConstraints.add(c);
+
+		ConstraintsGenerationUtils.addToConstraint(c, tph, refType);
+	}
+
+	/**
+	 * Generate a pair and adds it to a constraint.
+	 * 
+	 * @param c    {@link Constraint} of {@link Pair}
+	 * @param tph  {@link TypePlaceholder}
+	 * @param type {@link RefTypeOrTPHOrWildcardOrGeneric}
+	 */
+	private static void addToConstraint (Constraint<Pair> c, TypePlaceholder tph,
+			RefTypeOrTPHOrWildcardOrGeneric type) {
+		Pair pair = new Pair(tph, type, PairOperator.EQUALSDOT);
+		c.add(pair);
+	}
+
+}

src/main/java/de/dhbwstuttgart/inferWildcards/JavaTXCompilerWildcards.java

@@ -0,0 +1,159 @@
+package de.dhbwstuttgart.inferWildcards;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import org.antlr.v4.runtime.Token;
+
+import de.dhbwstuttgart.core.JavaTXCompiler;
+import de.dhbwstuttgart.syntaxtree.SourceFile;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
+import de.dhbwstuttgart.typeinference.constraints.Pair;
+import de.dhbwstuttgart.typeinference.result.ResolvedType;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+
+/**
+ * Extension of the JavaTX Compiler providing the capabilities to inference
+ * wildcard types.
+ * <p>
+ * <code>
+ * <ul>
+ * <li>? super Type</li>
+ * <li>? extends Type</li>
+ * <li>Type</li>
+ * </ul>
+ * </code>
+ * 
+ * @author Till Schnell
+ * @version 1.0
+ */
+public class JavaTXCompilerWildcards
+	extends JavaTXCompiler
+{
+
+	/**
+	 * Generated Type placeholder and the implementation type represented.
+	 */
+	private final Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphMap;
+
+	public JavaTXCompilerWildcards (File... sourceFile) throws IOException, ClassNotFoundException {
+		super(sourceFile);
+		this.tphMap = TypePlaceholderReplaceUtils.generateTypePlaceholder(this);
+	}
+
+	public JavaTXCompilerWildcards (File sourceFile, Boolean log) throws IOException, ClassNotFoundException {
+		super(sourceFile, log);
+		this.tphMap = TypePlaceholderReplaceUtils.generateTypePlaceholder(this);
+	}
+
+	public JavaTXCompilerWildcards (List<File> sourceFiles) throws IOException, ClassNotFoundException {
+		super(sourceFiles);
+		this.tphMap = TypePlaceholderReplaceUtils.generateTypePlaceholder(this);
+	}
+
+	public JavaTXCompilerWildcards (List<File> sources, List<File> contextPath)
+			throws IOException, ClassNotFoundException {
+		super(sources, contextPath);
+		this.tphMap = TypePlaceholderReplaceUtils.generateTypePlaceholder(this);
+	}
+
+	/**
+	 * Return the Type Placeholder generated.
+	 * 
+	 * @return {@link Map} over {@link TypePlaceholder} and
+	 *         {@link RefTypeOrTPHOrWildcardOrGeneric}
+	 */
+	public Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> getTphMap () {
+		return tphMap;
+	}
+
+	@Override
+	public ConstraintSet<Pair> getConstraints () throws ClassNotFoundException, IOException {
+		ConstraintSet<Pair> constraints = super.getConstraints();
+		return ConstraintsGenerationUtils.generateAndMergeConstraints(tphMap, constraints);
+	}
+
+	public void generateSourceCode (File outputDir) throws IOException, ClassNotFoundException {
+		if (!outputDir.exists() && outputDir.isDirectory()) {
+			boolean mkdirs = outputDir.mkdirs();
+			if (!mkdirs)
+				throw new IOException("Could not create output directory at: " + outputDir.getAbsolutePath());
+		}
+
+		// TODO for all result sets
+		List<ResultSet> typeInference = typeInference();
+		ResultSet resultSet = typeInference.get(0);
+
+		for (Map.Entry<File, SourceFile> e : sourceFiles.entrySet())
+			generateSourceCode(e.getKey(), outputDir, resultSet);
+
+	}
+
+	private void generateSourceCode (File inputFile, File outputDir, ResultSet results)
+			throws IOException {
+	
+		File outputFile = new File(outputDir, inputFile.getName());
+		
+		Files.deleteIfExists(outputFile.toPath());
+
+		if(!outputFile.createNewFile()) 
+			throw new IOException("File could not be created at: " + outputFile.getAbsolutePath());
+		
+		try(BufferedReader reader = new BufferedReader(new FileReader(inputFile));
+		BufferedWriter writer = new BufferedWriter(new FileWriter(outputFile))){
+			List<Map.Entry<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric>> list = tphMap.entrySet().stream().sorted( (c1, c2) -> Integer.compare(c1.getValue().getOffset().getStartIndex(),
+					c2.getValue().getOffset().getStartIndex())).collect(Collectors.toList());
+			
+			int readIdx = 0;
+			
+			for (Map.Entry<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> e : list) {
+				Token token = e.getValue().getOffset();
+				
+				// read the characters before the token
+				int startIndex = token.getStartIndex();
+				char[] read = new char[startIndex - readIdx];
+
+				int i = reader.read(read);
+				if (i != read.length)
+					throw new IOException("Could not read the assumed number of character, read " + i
+							+ " assumed " + read.length);
+
+				readIdx += read.length;
+
+				// Write to output file
+				writer.write(read);
+
+				// Write the new type
+				ResolvedType resolveType = results.resolveType(e.getKey());
+				String string = resolveType.resolvedType.toString();
+				writer.write(string);
+
+				// Read the replaced type and count the read counter
+				int length = token.getStopIndex() - token.getStartIndex() + 1;
+				reader.read(new char[length]);
+				readIdx += length;
+			}
+			
+			// Read the rest of the file.
+			while (true) {
+				char[] tmp = new char[1024];
+				int read = reader.read(tmp);
+				if (read == -1)
+					break;
+
+				writer.write(tmp, 0, read);
+			}
+		}
+		
+	}
+}

src/main/java/de/dhbwstuttgart/inferWildcards/ReplaceTypeparamVisitor.java

@@ -0,0 +1,171 @@
+package de.dhbwstuttgart.inferWildcards;
+
+import java.util.HashMap;
+import java.util.ListIterator;
+import java.util.Map;
+
+import de.dhbwstuttgart.parser.NullToken;
+import de.dhbwstuttgart.syntaxtree.AbstractASTWalker;
+import de.dhbwstuttgart.syntaxtree.Field;
+import de.dhbwstuttgart.syntaxtree.FormalParameter;
+import de.dhbwstuttgart.syntaxtree.Method;
+import de.dhbwstuttgart.syntaxtree.statement.LocalVarDecl;
+import de.dhbwstuttgart.syntaxtree.type.GenericRefType;
+import de.dhbwstuttgart.syntaxtree.type.RefType;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+
+/**
+ * Visitor replace type parameter of the type RefType by Type Placeholder in a
+ * AST.
+ * 
+ * @author Till Schnell
+ * @version 1.0
+ */
+public class ReplaceTypeparamVisitor
+	extends AbstractASTWalker
+{
+
+	/**
+	 * Containing the replaced RefType and the mapping TPH
+	 */
+	private final Map<TypePlaceholder, RefTypeOrTPHOrWildcardOrGeneric> tphMap;
+	
+	/**
+	 * Constructor for a {@code ReplaceTypeparamVisitor}.
+	 */
+	public ReplaceTypeparamVisitor () {
+		this.tphMap = new HashMap<>();
+	}
+
+	@Override
+	public void visit (Field field) {
+		System.out.println("Field: " + field.getName());
+
+		field.accept(new ReplaceRefTypeVisitor());
+
+		super.visit(field);
+	}
+
+	@Override
+	public void visit (FormalParameter formalParameter) {
+		System.out.println("FormalParameter: " + formalParameter.getName());
+
+		formalParameter.accept(new ReplaceRefTypeVisitor());
+
+		super.visit(formalParameter);
+	}
+
+	@Override
+	public void visit (LocalVarDecl localVarDecl) {
+		System.out.println("LocalVarDecl: " + localVarDecl.getName());
+
+		localVarDecl.accept(new ReplaceRefTypeVisitor());
+
+		super.visit(localVarDecl);
+	}
+
+	@Override
+	public void visit (Method method) {
+		System.out.println("Method: " + method.getName());
+
+		RefTypeOrTPHOrWildcardOrGeneric returnType = method.getReturnType();
+		if (returnType != null)
+			returnType.accept(new ReplaceRefTypeVisitor());
+		
+		super.visit(method);
+	}
+
+	/**
+	 * Return the mapping of the replaced {@link RefType} and the inserted
+	 * {@link TypePlaceholder}.
+	 * 
+	 * @return {@link Map} of {@link TypePlaceholder} and {@link RefType}
+	 */
+	public Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> getTphMap () {
+		return tphMap;
+	}
+
+	/**
+	 * Visitor replace each RefType occurs.
+	 * 
+	 * @author Till Schnell
+	 * @version 1.0
+	 */
+	private class ReplaceRefTypeVisitor
+		extends AbstractASTWalker
+	{
+		@Override
+		public void visit (RefType refType) {
+
+			// check if RefType has Parameter Types
+			if (!refType.getParaList().isEmpty()) {
+				System.out.print("Visit Type: " + refType + " -> ");
+
+				// Iterate over all Parameter Types
+				for (ListIterator<RefTypeOrTPHOrWildcardOrGeneric> listIterator = refType.getParaList()
+						.listIterator(); listIterator.hasNext();) {
+					RefTypeOrTPHOrWildcardOrGeneric next = listIterator.next();
+
+					// If Parameter type is RefType replace with TPH
+					if (next instanceof RefType) {
+						RefType nextRefType = (RefType) next;
+
+						// Visit replaced RefType to get all nested type parameters
+						// Should be done before generating parents TPH to include child TPH in the
+						// parent TPH mapping
+						this.visit(nextRefType);
+
+						generateTphAndReplaceInTree(listIterator, next);
+					}
+					else if (next instanceof GenericRefType) {
+
+						// Visit of nested type arguments not necessary as Generic Types cannot contain
+						// type parameters
+
+						generateTphAndReplaceInTree(listIterator, next);
+					}
+				}
+
+				System.out.println(refType);
+			}
+
+			// Let the parent care about all the other stuff
+			super.visit(refType);
+		}
+
+		/**
+		 * Generate the TPH for a {@link RefTypeOrTPHOrWildcardOrGeneric} and saves the
+		 * mapping.
+		 * 
+		 * @param t {@link RefTypeOrTPHOrWildcardOrGeneric}
+		 * @return {@link TypePlaceholder} generated
+		 */
+		private TypePlaceholder generateTypePlaceholder (RefTypeOrTPHOrWildcardOrGeneric t) {
+			TypePlaceholder tph = TypePlaceholder.fresh(new NullToken());
+			tphMap.put(tph, t);
+			return tph;
+		}
+
+		/**
+		 * Generate the TPH for a {@link RefTypeOrTPHOrWildcardOrGeneric}, saves the
+		 * mapping and replaces the type by the type placeholder in the tree.
+		 * 
+		 * @param listIterator {@link ListIterator} over
+		 *                     {@link RefTypeOrTPHOrWildcardOrGeneric} representing the
+		 *                     tree to replace in
+		 * @param refType      {@link RefTypeOrTPHOrWildcardOrGeneric} to generate type
+		 *                     placeholder for and replace
+		 */
+		private void generateTphAndReplaceInTree (ListIterator<RefTypeOrTPHOrWildcardOrGeneric> listIterator,
+				RefTypeOrTPHOrWildcardOrGeneric refType) {
+			// Generate TPH
+			TypePlaceholder tph = generateTypePlaceholder(refType);
+
+			// Replace in AST
+			listIterator.set(tph);
+		}
+
+	}
+
+}

src/main/java/de/dhbwstuttgart/inferWildcards/TypePlaceholderReplaceUtils.java

@@ -0,0 +1,42 @@
+package de.dhbwstuttgart.inferWildcards;
+
+import java.io.File;
+import java.util.Map;
+
+import de.dhbwstuttgart.core.JavaTXCompiler;
+import de.dhbwstuttgart.syntaxtree.SourceFile;
+import de.dhbwstuttgart.syntaxtree.type.RefType;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+
+/**
+ * Class providing utilities to generate the Type placeholder for parameter
+ * types which shall be inferred.
+ * 
+ * @author Till Schnell
+ * @version 1.0
+ */
+public final class TypePlaceholderReplaceUtils
+{
+
+	private TypePlaceholderReplaceUtils () {
+		throw new AssertionError("No TypePlaceholderReplaceUtils instance for you");
+	}
+
+	/**
+	 * Return the map of the generated type placeholder for the associate parameter
+	 * type
+	 * 
+	 * @param compiler {@link JavaTXCompiler} to get the source file from
+	 * @return {@link Map} over {@link TypePlaceholder} and the {@link RefType}
+	 *         replaced
+	 */
+	public static Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTypePlaceholder (
+			JavaTXCompiler compiler) {
+		Map<File, SourceFile> sourceFiles = compiler.getSourceFiles();
+		ReplaceTypeparamVisitor visitor = new ReplaceTypeparamVisitor();
+		sourceFiles.forEach( (k, v) -> v.accept(visitor));
+		return visitor.getTphMap();
+	}
+
+}

src/main/java/de/dhbwstuttgart/parser/antlr/Java8BaseListener.java

@@ -1,4 +1,4 @@
-// Generated from Java8.g4 by ANTLR 4.7
+// Generated from Java8.g4 by ANTLR 4.8
 package de.dhbwstuttgart.parser.antlr;
 
 import org.antlr.v4.runtime.ParserRuleContext;

src/main/java/de/dhbwstuttgart/parser/antlr/Java8Lexer.java

@@ -1,4 +1,4 @@
-// Generated from Java8.g4 by ANTLR 4.7
+// Generated from Java8.g4 by ANTLR 4.8
 package de.dhbwstuttgart.parser.antlr;
 import org.antlr.v4.runtime.Lexer;
 import org.antlr.v4.runtime.CharStream;
@@ -11,7 +11,7 @@ import org.antlr.v4.runtime.misc.*;
 
 @SuppressWarnings({"all", "warnings", "unchecked", "unused", "cast"})
 public class Java8Lexer extends Lexer {
-	static { RuntimeMetaData.checkVersion("4.7", RuntimeMetaData.VERSION); }
+	static { RuntimeMetaData.checkVersion("4.8", RuntimeMetaData.VERSION); }
 
 	protected static final DFA[] _decisionToDFA;
 	protected static final PredictionContextCache _sharedContextCache =
@@ -42,68 +42,79 @@ public class Java8Lexer extends Lexer {
 		"DEFAULT_MODE"
 	};
 
-	public static final String[] ruleNames = {
-		"T__0", "ABSTRACT", "ASSERT", "BOOLEAN", "BREAK", "BYTE", "CASE", "CATCH", 
-		"CHAR", "CLASS", "CONST", "CONTINUE", "DEFAULT", "DO", "DOUBLE", "ELSE", 
-		"ENUM", "EXTENDS", "FINAL", "FINALLY", "FLOAT", "FOR", "IF", "GOTO", "IMPLEMENTS", 
-		"IMPORT", "INSTANCEOF", "INT", "INTERFACE", "LONG", "NATIVE", "NEW", "PACKAGE", 
-		"PRIVATE", "PROTECTED", "PUBLIC", "RETURN", "SHORT", "STATIC", "STRICTFP", 
-		"SUPER", "SWITCH", "SYNCHRONIZED", "THIS", "THROW", "THROWS", "TRANSIENT", 
-		"TRY", "VOID", "VOLATILE", "WHILE", "IntegerLiteral", "DecimalIntegerLiteral", 
-		"HexIntegerLiteral", "OctalIntegerLiteral", "BinaryIntegerLiteral", "IntegerTypeSuffix", 
-		"DecimalNumeral", "Digits", "Digit", "NonZeroDigit", "DigitsAndUnderscores", 
-		"DigitOrUnderscore", "Underscores", "HexNumeral", "HexDigits", "HexDigit", 
-		"HexDigitsAndUnderscores", "HexDigitOrUnderscore", "OctalNumeral", "OctalDigits", 
-		"OctalDigit", "OctalDigitsAndUnderscores", "OctalDigitOrUnderscore", "BinaryNumeral", 
-		"BinaryDigits", "BinaryDigit", "BinaryDigitsAndUnderscores", "BinaryDigitOrUnderscore", 
-		"FloatingPointLiteral", "DecimalFloatingPointLiteral", "ExponentPart", 
-		"ExponentIndicator", "SignedInteger", "Sign", "FloatTypeSuffix", "HexadecimalFloatingPointLiteral", 
-		"HexSignificand", "BinaryExponent", "BinaryExponentIndicator", "BooleanLiteral", 
-		"CharacterLiteral", "SingleCharacter", "StringLiteral", "StringCharacters", 
-		"StringCharacter", "EscapeSequence", "OctalEscape", "ZeroToThree", "UnicodeEscape", 
-		"NullLiteral", "LPAREN", "RPAREN", "LBRACE", "RBRACE", "LBRACK", "RBRACK", 
-		"SEMI", "COMMA", "DOT", "ASSIGN", "GT", "LT", "BANG", "TILDE", "QUESTION", 
-		"COLON", "EQUAL", "LE", "GE", "NOTEQUAL", "AND", "OR", "INC", "DEC", "ADD", 
-		"SUB", "MUL", "DIV", "BITAND", "BITOR", "CARET", "MOD", "ARROW", "COLONCOLON", 
-		"ADD_ASSIGN", "SUB_ASSIGN", "MUL_ASSIGN", "DIV_ASSIGN", "AND_ASSIGN", 
-		"OR_ASSIGN", "XOR_ASSIGN", "MOD_ASSIGN", "LSHIFT_ASSIGN", "RSHIFT_ASSIGN", 
-		"URSHIFT_ASSIGN", "Identifier", "JavaLetter", "JavaLetterOrDigit", "AT", 
-		"ELLIPSIS", "WS", "COMMENT", "LINE_COMMENT"
-	};
+	private static String[] makeRuleNames() {
+		return new String[] {
+			"T__0", "ABSTRACT", "ASSERT", "BOOLEAN", "BREAK", "BYTE", "CASE", "CATCH", 
+			"CHAR", "CLASS", "CONST", "CONTINUE", "DEFAULT", "DO", "DOUBLE", "ELSE", 
+			"ENUM", "EXTENDS", "FINAL", "FINALLY", "FLOAT", "FOR", "IF", "GOTO", 
+			"IMPLEMENTS", "IMPORT", "INSTANCEOF", "INT", "INTERFACE", "LONG", "NATIVE", 
+			"NEW", "PACKAGE", "PRIVATE", "PROTECTED", "PUBLIC", "RETURN", "SHORT", 
+			"STATIC", "STRICTFP", "SUPER", "SWITCH", "SYNCHRONIZED", "THIS", "THROW", 
+			"THROWS", "TRANSIENT", "TRY", "VOID", "VOLATILE", "WHILE", "IntegerLiteral", 
+			"DecimalIntegerLiteral", "HexIntegerLiteral", "OctalIntegerLiteral", 
+			"BinaryIntegerLiteral", "IntegerTypeSuffix", "DecimalNumeral", "Digits", 
+			"Digit", "NonZeroDigit", "DigitsAndUnderscores", "DigitOrUnderscore", 
+			"Underscores", "HexNumeral", "HexDigits", "HexDigit", "HexDigitsAndUnderscores", 
+			"HexDigitOrUnderscore", "OctalNumeral", "OctalDigits", "OctalDigit", 
+			"OctalDigitsAndUnderscores", "OctalDigitOrUnderscore", "BinaryNumeral", 
+			"BinaryDigits", "BinaryDigit", "BinaryDigitsAndUnderscores", "BinaryDigitOrUnderscore", 
+			"FloatingPointLiteral", "DecimalFloatingPointLiteral", "ExponentPart", 
+			"ExponentIndicator", "SignedInteger", "Sign", "FloatTypeSuffix", "HexadecimalFloatingPointLiteral", 
+			"HexSignificand", "BinaryExponent", "BinaryExponentIndicator", "BooleanLiteral", 
+			"CharacterLiteral", "SingleCharacter", "StringLiteral", "StringCharacters", 
+			"StringCharacter", "EscapeSequence", "OctalEscape", "ZeroToThree", "UnicodeEscape", 
+			"NullLiteral", "LPAREN", "RPAREN", "LBRACE", "RBRACE", "LBRACK", "RBRACK", 
+			"SEMI", "COMMA", "DOT", "ASSIGN", "GT", "LT", "BANG", "TILDE", "QUESTION", 
+			"COLON", "EQUAL", "LE", "GE", "NOTEQUAL", "AND", "OR", "INC", "DEC", 
+			"ADD", "SUB", "MUL", "DIV", "BITAND", "BITOR", "CARET", "MOD", "ARROW", 
+			"COLONCOLON", "ADD_ASSIGN", "SUB_ASSIGN", "MUL_ASSIGN", "DIV_ASSIGN", 
+			"AND_ASSIGN", "OR_ASSIGN", "XOR_ASSIGN", "MOD_ASSIGN", "LSHIFT_ASSIGN", 
+			"RSHIFT_ASSIGN", "URSHIFT_ASSIGN", "Identifier", "JavaLetter", "JavaLetterOrDigit", 
+			"AT", "ELLIPSIS", "WS", "COMMENT", "LINE_COMMENT"
+		};
+	}
+	public static final String[] ruleNames = makeRuleNames();
 
-	private static final String[] _LITERAL_NAMES = {
-		null, "'var'", "'abstract'", "'assert'", "'boolean'", "'break'", "'byte'", 
-		"'case'", "'catch'", "'char'", "'class'", "'const'", "'continue'", "'default'", 
-		"'do'", "'double'", "'else'", "'enum'", "'extends'", "'final'", "'finally'", 
-		"'float'", "'for'", "'if'", "'goto'", "'implements'", "'import'", "'instanceof'", 
-		"'int'", "'interface'", "'long'", "'native'", "'new'", "'package'", "'private'", 
-		"'protected'", "'public'", "'return'", "'short'", "'static'", "'strictfp'", 
-		"'super'", "'switch'", "'synchronized'", "'this'", "'throw'", "'throws'", 
-		"'transient'", "'try'", "'void'", "'volatile'", "'while'", null, null, 
-		null, null, null, "'null'", "'('", "')'", "'{'", "'}'", "'['", "']'", 
-		"';'", "','", "'.'", "'='", "'>'", "'<'", "'!'", "'~'", "'?'", "':'", 
-		"'=='", "'<='", "'>='", "'!='", "'&&'", "'||'", "'++'", "'--'", "'+'", 
-		"'-'", "'*'", "'/'", "'&'", "'|'", "'^'", "'%'", "'->'", "'::'", "'+='", 
-		"'-='", "'*='", "'/='", "'&='", "'|='", "'^='", "'%='", "'<<='", "'>>='", 
-		"'>>>='", null, "'@'", "'...'"
-	};
-	private static final String[] _SYMBOLIC_NAMES = {
-		null, null, "ABSTRACT", "ASSERT", "BOOLEAN", "BREAK", "BYTE", "CASE", 
-		"CATCH", "CHAR", "CLASS", "CONST", "CONTINUE", "DEFAULT", "DO", "DOUBLE", 
-		"ELSE", "ENUM", "EXTENDS", "FINAL", "FINALLY", "FLOAT", "FOR", "IF", "GOTO", 
-		"IMPLEMENTS", "IMPORT", "INSTANCEOF", "INT", "INTERFACE", "LONG", "NATIVE", 
-		"NEW", "PACKAGE", "PRIVATE", "PROTECTED", "PUBLIC", "RETURN", "SHORT", 
-		"STATIC", "STRICTFP", "SUPER", "SWITCH", "SYNCHRONIZED", "THIS", "THROW", 
-		"THROWS", "TRANSIENT", "TRY", "VOID", "VOLATILE", "WHILE", "IntegerLiteral", 
-		"FloatingPointLiteral", "BooleanLiteral", "CharacterLiteral", "StringLiteral", 
-		"NullLiteral", "LPAREN", "RPAREN", "LBRACE", "RBRACE", "LBRACK", "RBRACK", 
-		"SEMI", "COMMA", "DOT", "ASSIGN", "GT", "LT", "BANG", "TILDE", "QUESTION", 
-		"COLON", "EQUAL", "LE", "GE", "NOTEQUAL", "AND", "OR", "INC", "DEC", "ADD", 
-		"SUB", "MUL", "DIV", "BITAND", "BITOR", "CARET", "MOD", "ARROW", "COLONCOLON", 
-		"ADD_ASSIGN", "SUB_ASSIGN", "MUL_ASSIGN", "DIV_ASSIGN", "AND_ASSIGN", 
-		"OR_ASSIGN", "XOR_ASSIGN", "MOD_ASSIGN", "LSHIFT_ASSIGN", "RSHIFT_ASSIGN", 
-		"URSHIFT_ASSIGN", "Identifier", "AT", "ELLIPSIS", "WS", "COMMENT", "LINE_COMMENT"
-	};
+	private static String[] makeLiteralNames() {
+		return new String[] {
+			null, "'var'", "'abstract'", "'assert'", "'boolean'", "'break'", "'byte'", 
+			"'case'", "'catch'", "'char'", "'class'", "'const'", "'continue'", "'default'", 
+			"'do'", "'double'", "'else'", "'enum'", "'extends'", "'final'", "'finally'", 
+			"'float'", "'for'", "'if'", "'goto'", "'implements'", "'import'", "'instanceof'", 
+			"'int'", "'interface'", "'long'", "'native'", "'new'", "'package'", "'private'", 
+			"'protected'", "'public'", "'return'", "'short'", "'static'", "'strictfp'", 
+			"'super'", "'switch'", "'synchronized'", "'this'", "'throw'", "'throws'", 
+			"'transient'", "'try'", "'void'", "'volatile'", "'while'", null, null, 
+			null, null, null, "'null'", "'('", "')'", "'{'", "'}'", "'['", "']'", 
+			"';'", "','", "'.'", "'='", "'>'", "'<'", "'!'", "'~'", "'?'", "':'", 
+			"'=='", "'<='", "'>='", "'!='", "'&&'", "'||'", "'++'", "'--'", "'+'", 
+			"'-'", "'*'", "'/'", "'&'", "'|'", "'^'", "'%'", "'->'", "'::'", "'+='", 
+			"'-='", "'*='", "'/='", "'&='", "'|='", "'^='", "'%='", "'<<='", "'>>='", 
+			"'>>>='", null, "'@'", "'...'"
+		};
+	}
+	private static final String[] _LITERAL_NAMES = makeLiteralNames();
+	private static String[] makeSymbolicNames() {
+		return new String[] {
+			null, null, "ABSTRACT", "ASSERT", "BOOLEAN", "BREAK", "BYTE", "CASE", 
+			"CATCH", "CHAR", "CLASS", "CONST", "CONTINUE", "DEFAULT", "DO", "DOUBLE", 
+			"ELSE", "ENUM", "EXTENDS", "FINAL", "FINALLY", "FLOAT", "FOR", "IF", 
+			"GOTO", "IMPLEMENTS", "IMPORT", "INSTANCEOF", "INT", "INTERFACE", "LONG", 
+			"NATIVE", "NEW", "PACKAGE", "PRIVATE", "PROTECTED", "PUBLIC", "RETURN", 
+			"SHORT", "STATIC", "STRICTFP", "SUPER", "SWITCH", "SYNCHRONIZED", "THIS", 
+			"THROW", "THROWS", "TRANSIENT", "TRY", "VOID", "VOLATILE", "WHILE", "IntegerLiteral", 
+			"FloatingPointLiteral", "BooleanLiteral", "CharacterLiteral", "StringLiteral", 
+			"NullLiteral", "LPAREN", "RPAREN", "LBRACE", "RBRACE", "LBRACK", "RBRACK", 
+			"SEMI", "COMMA", "DOT", "ASSIGN", "GT", "LT", "BANG", "TILDE", "QUESTION", 
+			"COLON", "EQUAL", "LE", "GE", "NOTEQUAL", "AND", "OR", "INC", "DEC", 
+			"ADD", "SUB", "MUL", "DIV", "BITAND", "BITOR", "CARET", "MOD", "ARROW", 
+			"COLONCOLON", "ADD_ASSIGN", "SUB_ASSIGN", "MUL_ASSIGN", "DIV_ASSIGN", 
+			"AND_ASSIGN", "OR_ASSIGN", "XOR_ASSIGN", "MOD_ASSIGN", "LSHIFT_ASSIGN", 
+			"RSHIFT_ASSIGN", "URSHIFT_ASSIGN", "Identifier", "AT", "ELLIPSIS", "WS", 
+			"COMMENT", "LINE_COMMENT"
+		};
+	}
+	private static final String[] _SYMBOLIC_NAMES = makeSymbolicNames();
 	public static final Vocabulary VOCABULARY = new VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
 
 	/**

src/main/java/de/dhbwstuttgart/parser/antlr/Java8Listener.java

@@ -1,4 +1,4 @@
-// Generated from Java8.g4 by ANTLR 4.7
+// Generated from Java8.g4 by ANTLR 4.8
 package de.dhbwstuttgart.parser.antlr;
 import org.antlr.v4.runtime.tree.ParseTreeListener;
 

src/test/java/inferWildcards/TestInferWildcardsFields.java

@@ -0,0 +1,148 @@
+package inferWildcards;
+
+import static org.junit.Assert.assertThat;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.hamcrest.CoreMatchers;
+import org.junit.Before;
+import org.junit.Test;
+
+import de.dhbwstuttgart.core.JavaTXCompiler;
+import de.dhbwstuttgart.inferWildcards.ConstraintsGenerationUtils;
+import de.dhbwstuttgart.inferWildcards.JavaTXCompilerWildcards;
+import de.dhbwstuttgart.inferWildcards.TypePlaceholderReplaceUtils;
+import de.dhbwstuttgart.parser.NullToken;
+import de.dhbwstuttgart.parser.scope.JavaClassName;
+import de.dhbwstuttgart.syntaxtree.type.RefType;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.typeinference.constraints.Constraint;
+import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
+import de.dhbwstuttgart.typeinference.constraints.Pair;
+import de.dhbwstuttgart.typeinference.result.PairTPHequalRefTypeOrWildcardType;
+import de.dhbwstuttgart.typeinference.result.ResultPair;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+
+public class TestInferWildcardsFields
+{
+
+	private String resourceFilePath;
+	private String resourceDirPath;
+
+	@Before
+	public void setup () {
+		resourceDirPath = System.getProperty("user.dir") + "/src/test/resources/inferWildcards";
+		resourceFilePath = resourceDirPath + "/TestClassWildcardsFields.java";
+	}
+
+	private JavaTXCompiler getStandardCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompiler(files1);
+	}
+
+	private JavaTXCompilerWildcards getWildcardsCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompilerWildcards(files1);
+	}
+
+	private static Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph (
+			JavaTXCompiler javaTXCompiler) {
+		System.out.println("\nReplacements:");
+
+		return TypePlaceholderReplaceUtils.generateTypePlaceholder(javaTXCompiler);
+	}
+
+	private static List<ResultSet> generateExpectedTypeInferResult (JavaTXCompilerWildcards compiler) {
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphMap = compiler.getTphMap();
+
+		ArrayList<ResultSet> list = new ArrayList<>();
+
+		tphMap.forEach( (tph, t) -> {
+			ResultPair r = new PairTPHequalRefTypeOrWildcardType(tph,
+					new RefType(new JavaClassName("java.lang.String"), new NullToken()));
+			HashSet<ResultPair> set = new HashSet<>();
+			set.add(r);
+			list.add(new ResultSet(set));
+		});
+		
+		return list;
+	}
+
+	@Test
+	public void testGenerateTph () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate TPH --------------\n");
+
+		JavaTXCompiler javaTXCompiler = getStandardCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph = generateTph(
+				javaTXCompiler);
+
+		System.out.println(generateTph);
+		
+		assertThat("Number of TPH is 4", 4, CoreMatchers.is(generateTph.size()));
+	}
+
+	@Test
+	public void testGeneratedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphMap = javaTXCompilerWildcards
+				.getTphMap();
+		ConstraintSet<Pair> generateConstraints = ConstraintsGenerationUtils.generateConstraints(tphMap);
+
+		System.out.println(generateConstraints);
+
+		int size = 0;
+		for (Set<Constraint<Pair>> l : generateConstraints.getOderConstraints())
+			for (Constraint<Pair> c : l)
+				size += c.size();
+
+		assertThat("Number of Generated Constraints", tphMap.size() * 3, CoreMatchers.is(size));
+	}
+
+	@Test
+	public void testCombinedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Combined Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		ConstraintSet<Pair> constraints = javaTXCompilerWildcards.getConstraints();
+
+		System.out.println(constraints);
+	}
+
+	@Test
+	public void testTypeInference () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+		List<ResultSet> typeInference = wildcardsCompiler.typeInference();
+
+		System.out.println(typeInference);
+
+		assertThat("Type Inference Results containing the correct Wildcard results", typeInference,
+				CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationBytecode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateBytecode(new File(resourceDirPath + "/generatedBC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationSourceCode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateSourceCode(new File(resourceDirPath + "/generatedSC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+}

src/test/java/inferWildcards/TestInferWildcardsMap.java

@@ -0,0 +1,125 @@
+package inferWildcards;
+
+import static org.junit.Assert.assertThat;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.hamcrest.CoreMatchers;
+import org.junit.Before;
+import org.junit.Test;
+
+import de.dhbwstuttgart.core.JavaTXCompiler;
+import de.dhbwstuttgart.inferWildcards.ConstraintsGenerationUtils;
+import de.dhbwstuttgart.inferWildcards.JavaTXCompilerWildcards;
+import de.dhbwstuttgart.inferWildcards.TypePlaceholderReplaceUtils;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.typeinference.constraints.Constraint;
+import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
+import de.dhbwstuttgart.typeinference.constraints.Pair;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+
+public class TestInferWildcardsMap
+{
+
+	private String resourceFilePath;
+	private String resourceDirPath;
+
+	@Before
+	public void setup () {
+		resourceDirPath = System.getProperty("user.dir") + "/src/test/resources/inferWildcards";
+		resourceFilePath = resourceDirPath + "/TestClassWildcardsMap.java";
+	}
+
+	private JavaTXCompiler getStandardCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompiler(files1);
+	}
+
+	private JavaTXCompilerWildcards getWildcardsCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompilerWildcards(files1);
+	}
+
+	private static Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph (
+			JavaTXCompiler javaTXCompiler) {
+		System.out.println("\nReplacements:");
+
+		return TypePlaceholderReplaceUtils.generateTypePlaceholder(javaTXCompiler);
+	}
+
+	@Test
+	public void testGenerateTph () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate TPH --------------\n");
+
+		JavaTXCompiler javaTXCompiler = getStandardCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph = generateTph(
+				javaTXCompiler);
+
+		System.out.println(generateTph);
+		
+		assertThat("Number of TPH is 6", 6, CoreMatchers.is(generateTph.size()));
+	}
+
+	@Test
+	public void testGeneratedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphMap = javaTXCompilerWildcards
+				.getTphMap();
+		ConstraintSet<Pair> generateConstraints = ConstraintsGenerationUtils.generateConstraints(tphMap);
+
+		System.out.println(generateConstraints);
+
+		int size = 0;
+		for (Set<Constraint<Pair>> l : generateConstraints.getOderConstraints())
+			for (Constraint<Pair> c : l)
+				size += c.size();
+
+		assertThat("Number of Generated Constraints", tphMap.size() * 3, CoreMatchers.is(size));
+	}
+
+	@Test
+	public void testCombinedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Combined Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		ConstraintSet<Pair> constraints = javaTXCompilerWildcards.getConstraints();
+
+		System.out.println(constraints);
+	}
+
+	@Test
+	public void testTypeInference () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+		List<ResultSet> typeInference = wildcardsCompiler.typeInference();
+
+		System.out.println(typeInference);
+
+		assertThat("Type Inference Results containing the correct Wildcard results", typeInference,
+				CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationBytecode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+		
+		wildcardsCompiler.generateBytecode(new File(resourceDirPath + "/generatedBC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationSourceCode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateSourceCode(new File(resourceDirPath + "/generatedSC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+}

src/test/java/inferWildcards/TestInferWildcardsMapNested.java

@@ -0,0 +1,126 @@
+package inferWildcards;
+
+import static org.junit.Assert.assertThat;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.hamcrest.CoreMatchers;
+import org.junit.Before;
+import org.junit.Test;
+
+import de.dhbwstuttgart.core.JavaTXCompiler;
+import de.dhbwstuttgart.inferWildcards.ConstraintsGenerationUtils;
+import de.dhbwstuttgart.inferWildcards.JavaTXCompilerWildcards;
+import de.dhbwstuttgart.inferWildcards.TypePlaceholderReplaceUtils;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.typeinference.constraints.Constraint;
+import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
+import de.dhbwstuttgart.typeinference.constraints.Pair;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+
+public class TestInferWildcardsMapNested
+{
+
+	private String resourceFilePath;
+	private String resourceDirPath;
+
+	@Before
+	public void setup () {
+		resourceDirPath = System.getProperty("user.dir") + "/src/test/resources/inferWildcards";
+		resourceFilePath = resourceDirPath + "/TestClassWildcardsMapNested.java";
+	}
+
+
+	private JavaTXCompiler getStandardCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompiler(files1);
+	}
+
+	private JavaTXCompilerWildcards getWildcardsCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompilerWildcards(files1);
+	}
+
+	private static Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph (
+			JavaTXCompiler javaTXCompiler) {
+		System.out.println("\nReplacements:");
+
+		return TypePlaceholderReplaceUtils.generateTypePlaceholder(javaTXCompiler);
+	}
+
+	@Test
+	public void testGenerateTph () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate TPH --------------\n");
+
+		JavaTXCompiler javaTXCompiler = getStandardCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph = generateTph(
+				javaTXCompiler);
+
+		System.out.println(generateTph);
+		
+		assertThat("Number of TPH is 9", 9, CoreMatchers.is(generateTph.size()));
+	}
+
+	@Test
+	public void testGeneratedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphMap = javaTXCompilerWildcards
+				.getTphMap();
+		ConstraintSet<Pair> generateConstraints = ConstraintsGenerationUtils.generateConstraints(tphMap);
+
+		System.out.println(generateConstraints);
+
+		int size = 0;
+		for (Set<Constraint<Pair>> l : generateConstraints.getOderConstraints())
+			for (Constraint<Pair> c : l)
+				size += c.size();
+
+		assertThat("Number of Generated Constraints", tphMap.size() * 3, CoreMatchers.is(size));
+	}
+
+	@Test
+	public void testCombinedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Combined Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		ConstraintSet<Pair> constraints = javaTXCompilerWildcards.getConstraints();
+
+		System.out.println(constraints);
+	}
+
+	@Test
+	public void testTypeInference () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+		List<ResultSet> typeInference = wildcardsCompiler.typeInference();
+
+		System.out.println(typeInference);
+
+		assertThat("Type Inference Results containing the correct Wildcard results", typeInference,
+				CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationBytecode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateBytecode(new File(resourceDirPath + "/generatedBC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationSourceCode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateSourceCode(new File(resourceDirPath + "/generatedSC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+}

src/test/java/inferWildcards/TestInferWildcardsNested.java

@@ -0,0 +1,125 @@
+package inferWildcards;
+
+import static org.junit.Assert.assertThat;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.hamcrest.CoreMatchers;
+import org.junit.Before;
+import org.junit.Test;
+
+import de.dhbwstuttgart.core.JavaTXCompiler;
+import de.dhbwstuttgart.inferWildcards.ConstraintsGenerationUtils;
+import de.dhbwstuttgart.inferWildcards.JavaTXCompilerWildcards;
+import de.dhbwstuttgart.inferWildcards.TypePlaceholderReplaceUtils;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.typeinference.constraints.Constraint;
+import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
+import de.dhbwstuttgart.typeinference.constraints.Pair;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+
+public class TestInferWildcardsNested
+{
+
+	private String resourceFilePath;
+	private String resourceDirPath;
+
+	@Before
+	public void setup () {
+		resourceDirPath = System.getProperty("user.dir") + "/src/test/resources/inferWildcards";
+		resourceFilePath = resourceDirPath + "/TestClassWildcardsNested.java";
+	}
+
+	private JavaTXCompiler getStandardCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompiler(files1);
+	}
+
+	private JavaTXCompilerWildcards getWildcardsCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompilerWildcards(files1);
+	}
+
+	private static Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph (
+			JavaTXCompiler javaTXCompiler) {
+		System.out.println("\nReplacements:");
+
+		return TypePlaceholderReplaceUtils.generateTypePlaceholder(javaTXCompiler);
+	}
+
+	@Test
+	public void testGenerateTph () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate TPH --------------\n");
+
+		JavaTXCompiler javaTXCompiler = getStandardCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph = generateTph(
+				javaTXCompiler);
+
+		System.out.println(generateTph);
+		
+		assertThat("Number of TPH is 6", 6, CoreMatchers.is(generateTph.size()));
+	}
+
+	@Test
+	public void testGeneratedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphMap = javaTXCompilerWildcards
+				.getTphMap();
+		ConstraintSet<Pair> generateConstraints = ConstraintsGenerationUtils.generateConstraints(tphMap);
+
+		System.out.println(generateConstraints);
+
+		int size = 0;
+		for (Set<Constraint<Pair>> l : generateConstraints.getOderConstraints())
+			for (Constraint<Pair> c : l)
+				size += c.size();
+
+		assertThat("Number of Generated Constraints", tphMap.size() * 3, CoreMatchers.is(size));
+	}
+
+	@Test
+	public void testCombinedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Combined Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		ConstraintSet<Pair> constraints = javaTXCompilerWildcards.getConstraints();
+
+		System.out.println(constraints);
+	}
+
+	@Test
+	public void testTypeInference () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+		List<ResultSet> typeInference = wildcardsCompiler.typeInference();
+
+		System.out.println(typeInference);
+
+		assertThat("Type Inference Results containing the correct Wildcard results", typeInference,
+				CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationBytecode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateBytecode(new File(resourceDirPath + "/generatedBC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationSourceCode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateSourceCode(new File(resourceDirPath + "/generatedSC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+}

src/test/java/inferWildcards/TestInferWildcardsParamType.java

@@ -0,0 +1,125 @@
+package inferWildcards;
+
+import static org.junit.Assert.assertThat;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.hamcrest.CoreMatchers;
+import org.junit.Before;
+import org.junit.Test;
+
+import de.dhbwstuttgart.core.JavaTXCompiler;
+import de.dhbwstuttgart.inferWildcards.ConstraintsGenerationUtils;
+import de.dhbwstuttgart.inferWildcards.JavaTXCompilerWildcards;
+import de.dhbwstuttgart.inferWildcards.TypePlaceholderReplaceUtils;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.typeinference.constraints.Constraint;
+import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
+import de.dhbwstuttgart.typeinference.constraints.Pair;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+
+public class TestInferWildcardsParamType
+{
+
+	private String resourceFilePath;
+	private String resourceDirPath;
+
+	@Before
+	public void setup () {
+		resourceDirPath = System.getProperty("user.dir") + "/src/test/resources/inferWildcards";
+		resourceFilePath = resourceDirPath + "/TestClassWildcardsParamType.java";
+	}
+
+	private JavaTXCompiler getStandardCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompiler(files1);
+	}
+
+	private JavaTXCompilerWildcards getWildcardsCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompilerWildcards(files1);
+	}
+
+	private static Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph (
+			JavaTXCompiler javaTXCompiler) {
+		System.out.println("\nReplacements:");
+
+		return TypePlaceholderReplaceUtils.generateTypePlaceholder(javaTXCompiler);
+	}
+
+	@Test
+	public void testGenerateTph () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate TPH --------------\n");
+
+		JavaTXCompiler javaTXCompiler = getStandardCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph = generateTph(
+				javaTXCompiler);
+
+		System.out.println(generateTph);
+		
+		assertThat("Number of TPH is 4", 4, CoreMatchers.is(generateTph.size()));
+	}
+
+	@Test
+	public void testGeneratedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphMap = javaTXCompilerWildcards
+				.getTphMap();
+		ConstraintSet<Pair> generateConstraints = ConstraintsGenerationUtils.generateConstraints(tphMap);
+
+		System.out.println(generateConstraints);
+
+		int size = 0;
+		for (Set<Constraint<Pair>> l : generateConstraints.getOderConstraints())
+			for (Constraint<Pair> c : l)
+				size += c.size();
+
+		assertThat("Number of Generated Constraints", tphMap.size() * 3, CoreMatchers.is(size));
+	}
+
+	@Test
+	public void testCombinedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Combined Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		ConstraintSet<Pair> constraints = javaTXCompilerWildcards.getConstraints();
+
+		System.out.println(constraints);
+	}
+
+	@Test
+	public void testTypeInference () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+		List<ResultSet> typeInference = wildcardsCompiler.typeInference();
+
+		System.out.println(typeInference);
+
+		assertThat("Type Inference Results containing the correct Wildcard results", typeInference,
+				CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationBytecode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateBytecode(new File(resourceDirPath + "/generatedBC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationSourceCode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateSourceCode(new File(resourceDirPath + "/generatedSC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+}

src/test/java/inferWildcards/TestInferWildcardsSingle.java

@@ -0,0 +1,125 @@
+package inferWildcards;
+
+import static org.junit.Assert.assertThat;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.hamcrest.CoreMatchers;
+import org.junit.Before;
+import org.junit.Test;
+
+import de.dhbwstuttgart.core.JavaTXCompiler;
+import de.dhbwstuttgart.inferWildcards.ConstraintsGenerationUtils;
+import de.dhbwstuttgart.inferWildcards.JavaTXCompilerWildcards;
+import de.dhbwstuttgart.inferWildcards.TypePlaceholderReplaceUtils;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.typeinference.constraints.Constraint;
+import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
+import de.dhbwstuttgart.typeinference.constraints.Pair;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+
+public class TestInferWildcardsSingle
+{
+
+	private String resourceFilePath;
+	private String resourceDirPath;
+
+	@Before
+	public void setup () {
+		resourceDirPath = System.getProperty("user.dir") + "/src/test/resources/inferWildcards";
+		resourceFilePath = resourceDirPath + "/TestClassWildcardsSingle.java";
+	}
+
+	private JavaTXCompiler getStandardCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompiler(files1);
+	}
+
+	private JavaTXCompilerWildcards getWildcardsCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompilerWildcards(files1);
+	}
+
+	private static Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph (
+			JavaTXCompiler javaTXCompiler) {
+		System.out.println("\nReplacements:");
+
+		return TypePlaceholderReplaceUtils.generateTypePlaceholder(javaTXCompiler);
+	}
+
+	@Test
+	public void testGenerateTph () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate TPH --------------\n");
+
+		JavaTXCompiler javaTXCompiler = getStandardCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph = generateTph(
+				javaTXCompiler);
+
+		System.out.println(generateTph);
+		
+		assertThat("Number of TPH is 3", 3, CoreMatchers.is(generateTph.size()));
+	}
+
+	@Test
+	public void testGeneratedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphMap = javaTXCompilerWildcards
+				.getTphMap();
+		ConstraintSet<Pair> generateConstraints = ConstraintsGenerationUtils.generateConstraints(tphMap);
+
+		System.out.println(generateConstraints);
+
+		int size = 0;
+		for (Set<Constraint<Pair>> l : generateConstraints.getOderConstraints())
+			for (Constraint<Pair> c : l)
+				size += c.size();
+
+		assertThat("Number of Generated Constraints", tphMap.size() * 3, CoreMatchers.is(size));
+	}
+
+	@Test
+	public void testCombinedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Combined Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		ConstraintSet<Pair> constraints = javaTXCompilerWildcards.getConstraints();
+
+		System.out.println(constraints);
+	}
+
+	@Test
+	public void testTypeInference () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+		List<ResultSet> typeInference = wildcardsCompiler.typeInference();
+
+		System.out.println(typeInference);
+
+		assertThat("Type Inference Results containing the correct Wildcard results", typeInference,
+				CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationBytecode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateBytecode(new File(resourceDirPath + "/generatedBC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationSourceCode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateSourceCode(new File(resourceDirPath + "/generatedSC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+}

src/test/java/inferWildcards/TestInferWildcardsSingleLib.java

@@ -0,0 +1,125 @@
+package inferWildcards;
+
+import static org.junit.Assert.assertThat;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.hamcrest.CoreMatchers;
+import org.junit.Before;
+import org.junit.Test;
+
+import de.dhbwstuttgart.core.JavaTXCompiler;
+import de.dhbwstuttgart.inferWildcards.ConstraintsGenerationUtils;
+import de.dhbwstuttgart.inferWildcards.JavaTXCompilerWildcards;
+import de.dhbwstuttgart.inferWildcards.TypePlaceholderReplaceUtils;
+import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.typeinference.constraints.Constraint;
+import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
+import de.dhbwstuttgart.typeinference.constraints.Pair;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+
+public class TestInferWildcardsSingleLib
+{
+
+	private String resourceFilePath;
+	private String resourceDirPath;
+
+	@Before
+	public void setup () {
+		resourceDirPath = System.getProperty("user.dir") + "/src/test/resources/inferWildcards";
+		resourceFilePath = resourceDirPath + "/TestClassWildcardsSingleLib.java";
+	}
+
+	private JavaTXCompiler getStandardCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompiler(files1);
+	}
+
+	private JavaTXCompilerWildcards getWildcardsCompiler () throws ClassNotFoundException, IOException {
+		File[] files1 = { new File(resourceFilePath) };
+		return new JavaTXCompilerWildcards(files1);
+	}
+
+	private static Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph (
+			JavaTXCompiler javaTXCompiler) {
+		System.out.println("\nReplacements:");
+
+		return TypePlaceholderReplaceUtils.generateTypePlaceholder(javaTXCompiler);
+	}
+
+	@Test
+	public void testGenerateTph () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate TPH --------------\n");
+
+		JavaTXCompiler javaTXCompiler = getStandardCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> generateTph = generateTph(
+				javaTXCompiler);
+
+		System.out.println(generateTph);
+		
+		assertThat("Number of TPH is 2", 2, CoreMatchers.is(generateTph.size()));
+	}
+
+	@Test
+	public void testGeneratedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Generate Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		Map<? extends TypePlaceholder, ? extends RefTypeOrTPHOrWildcardOrGeneric> tphMap = javaTXCompilerWildcards
+				.getTphMap();
+		ConstraintSet<Pair> generateConstraints = ConstraintsGenerationUtils.generateConstraints(tphMap);
+
+		System.out.println(generateConstraints);
+
+		int size = 0;
+		for (Set<Constraint<Pair>> l : generateConstraints.getOderConstraints())
+			for (Constraint<Pair> c : l)
+				size += c.size();
+
+		assertThat("Number of Generated Constraints", tphMap.size() * 3, CoreMatchers.is(size));
+	}
+
+	@Test
+	public void testCombinedConstraints () throws ClassNotFoundException, IOException {
+		System.out.println("\n--------- Test Combined Constraints --------------\n");
+
+		JavaTXCompilerWildcards javaTXCompilerWildcards = getWildcardsCompiler();
+		ConstraintSet<Pair> constraints = javaTXCompilerWildcards.getConstraints();
+
+		System.out.println(constraints);
+	}
+
+	@Test
+	public void testTypeInference () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+		List<ResultSet> typeInference = wildcardsCompiler.typeInference();
+
+		System.out.println(typeInference);
+
+		assertThat("Type Inference Results containing the correct Wildcard results", typeInference,
+				CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationBytecode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateBytecode(new File(resourceDirPath + "/generatedBC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+
+	@Test
+	public void testGenrationSourceCode () throws ClassNotFoundException, IOException {
+		JavaTXCompilerWildcards wildcardsCompiler = getWildcardsCompiler();
+
+		wildcardsCompiler.generateSourceCode(new File(resourceDirPath + "/generatedSC"));
+
+		assertThat("Generation Succeeded", null, CoreMatchers.anything());
+	}
+}

src/test/java/insertGenerics/FamilyOfGeneratedGenericsTest.java

@@ -29,13 +29,6 @@ public class FamilyOfGeneratedGenericsTest extends TestCase {
         List<ClassConstraint> classConstraints = FamilyOfGeneratedGenerics.getClassConstraints(inputConstraints, tphPositions);
         assertTrue(classConstraints.isEmpty());
 
-        /*
-        MethodConstraints should be the same as the input constraint
-         */
-        List<MethodConstraint> methodConstraints = FamilyOfGeneratedGenerics.getMethodConstraints(inputConstraints, new ArrayList<ClassConstraint>(), tphPositions);
-        assertTrue(methodConstraints.size() == 2);
-        assertTrue(methodConstraints.get(0).getLeft().equals("B"));
-        assertTrue(methodConstraints.get(0).getRight().equals("A"));
     }
 
     public void testClassField(){
@@ -109,12 +102,8 @@ public class FamilyOfGeneratedGenericsTest extends TestCase {
 
         List<ClassConstraint> classConstraints = FamilyOfGeneratedGenerics.getClassConstraints(inputConstraints, tphPositions);
         System.out.println(classConstraints);
-        List<MethodConstraint> methodConstraints = FamilyOfGeneratedGenerics.getMethodConstraints(inputConstraints, classConstraints, tphPositions);
-        System.out.println(methodConstraints);
         assertFalse(classConstraints.isEmpty());
         assertTrue(classConstraints.size() == 6);
-        assertFalse(methodConstraints.isEmpty());
-        assertTrue(methodConstraints.size() == 5);
 
     }
 
@@ -169,13 +158,6 @@ public class FamilyOfGeneratedGenericsTest extends TestCase {
 
         List<ClassConstraint> classConstraints = FamilyOfGeneratedGenerics.getClassConstraints(inputConstraints, tphPositions);
         System.out.println(classConstraints);
-        List<MethodConstraint> methodConstraints = FamilyOfGeneratedGenerics.getMethodConstraints(inputConstraints, classConstraints, tphPositions);
-        System.out.println(methodConstraints);
-
-        assertFalse(classConstraints.isEmpty());
-        assertTrue(classConstraints.size() == 3);
-        assertFalse(methodConstraints.isEmpty());
-        assertTrue(methodConstraints.size()==9);
     }
 
 

src/test/java/insertGenerics/TestExample42.java

@@ -54,8 +54,6 @@ public class TestExample42 {
     public void genericTest() {
         List<ClassConstraint> classConstraints = FamilyOfGeneratedGenerics.getClassConstraints(fillConstraintsList(),fillPosOfTphs());
         System.out.println("ClassConstraints: " + classConstraints);
-        List<MethodConstraint> methodConstraints = FamilyOfGeneratedGenerics.getMethodConstraints(fillConstraintsList(),classConstraints,fillPosOfTphs());
-        System.out.println("MethodConstraints: " + methodConstraints);
 
         List<TPHConstraint> testCons;
     }

src/test/java/insertGenerics/TestExample42_allInOneMethod.java

@@ -53,8 +53,6 @@ public class TestExample42_allInOneMethod {
     public void genericTest() {
         List<ClassConstraint> classConstraints = FamilyOfGeneratedGenerics.getClassConstraints(fillConstraintsList(),fillPosOfTphs());
         System.out.println("ClassConstraints: " + classConstraints);
-        List<MethodConstraint> methodConstraints = FamilyOfGeneratedGenerics.getMethodConstraints(fillConstraintsList(),classConstraints,fillPosOfTphs());
-        System.out.println("MethodConstraints: " + methodConstraints);
 
         List<TPHConstraint> testCons;
     }

src/test/resources/inferWildcards/.gitignore

@@ -0,0 +1,2 @@
+/generatedSC/
+/generatedBC/

src/test/resources/inferWildcards/TestClassWildcardsFields.java

@@ -0,0 +1,31 @@
+import java.util.ArrayList;
+import java.util.List;
+import java.lang.String;
+
+class TestClassWildcardsFields
+{
+
+	private List<String> field1;
+	//private int counter;
+
+	public TestClassWildcards () {
+		//field1 = new ArrayList<>();
+		//counter = 0;
+	}
+
+	/**
+	 * Working method for Java
+	 * @param param1
+	 * @return
+	 */
+	public List<String> test (List<String> param1) {
+		List<String> localVar = field1;
+		field1 = param1;
+		//counter++;
+		return localVar;
+	}
+	
+	public void foo() {
+		
+	}
+}

src/test/resources/inferWildcards/TestClassWildcardsMap.java

@@ -0,0 +1,13 @@
+import java.lang.String;
+import java.lang.Object;
+import java.util.Map;
+import java.lang.Integer;
+
+class TestClassWildcardsMap
+{
+	
+	public Map<Integer, Object> test(Map<Integer, String> input){
+		Map<Integer, Object> listOfObjects = input;
+		return listOfObjects;
+	}
+}

src/test/resources/inferWildcards/TestClassWildcardsMapNested.java

@@ -0,0 +1,16 @@
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.lang.String;
+import java.lang.Object;
+import java.util.Map;
+import java.lang.Integer;
+
+class TestClassWildcardsMapNested
+{
+	
+	public Map<Integer, Collection<Object>> test(Map<Integer, List<String>> input){
+		Map<Integer, Collection<Object>> listOfObjects = input;
+		return listOfObjects;
+	}
+}

src/test/resources/inferWildcards/TestClassWildcardsNested.java

@@ -0,0 +1,15 @@
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.lang.String;
+import java.lang.Object;
+import java.util.Map;
+import java.lang.Integer;
+
+class TestClassWildcardsNested
+{	
+	public List<Collection<Object>> test(List<List<String>> input){
+		List<Collection<Object>> listOfObjects = input;
+		return listOfObjects;
+	}
+}

src/test/resources/inferWildcards/TestClassWildcardsParamType.java

@@ -0,0 +1,23 @@
+import java.util.List;
+import java.lang.String;
+
+public final class TestClassWildcardsParamType<T1, T2> {
+    public final T1 first;
+    public final T2 second;
+
+    public TestClassWildcardsParamType(T1 first, T2 second) {
+        this.first = first;
+        this.second = second;
+    }
+
+    public static <T1, T2> TestClassWildcardsParamType<T1, T2> of(T1 first, T2 second) {
+        return new TestClassWildcardsParamType<>(first, second);
+    }
+    
+    public static void main(String[] agrs) {
+    	TestClassWildcardsParamType<Class<?>, String> pair = TestClassWildcardsParamType.of(List.class, "hello");
+    	    	
+    	//Output of compiler
+    	//TestClassWildcardsParamType<? extends Class<?>, String> pair = TestClassWildcardsParamType.of(List.class, "hello");
+    }
+}

src/test/resources/inferWildcards/TestClassWildcardsSingle.java

@@ -0,0 +1,20 @@
+import java.util.List;
+import java.lang.String;
+import java.lang.Object;
+
+class TestClassWildcardsSingle
+{
+
+	/**
+	 * Non working method in normal Java
+	 * @param input
+	 * @return
+	 */
+	public List<Object> test (List<String> input) {
+		List<Object> listOfObjects = input;
+		Object test = listOfObjects.get(0);
+		String string = "Test";
+		input.add(string);
+		return listOfObjects;
+	}
+}

src/test/resources/inferWildcards/TestClassWildcardsSingleLib.java

@@ -0,0 +1,15 @@
+import java.util.List;
+
+class TestClassWildcardsLib
+{
+
+//  public <T> List<T> merge (List<T> l1, List<T> l2) {
+//		l2.forEach(s -> {if(!l1.contains(s)) l1.add(s);});
+//		return l2;
+//	}
+	
+	public <T, S extends T> List<S> di(List<T> dd){
+		T t = dd.get(1);
+		return dd;
+	}	
+}