removed unused code

Reviewed-on: #1

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

@@ -37,20 +37,13 @@ import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
 import de.dhbwstuttgart.typeinference.constraints.Pair;
 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.distributeVariance;
+import de.dhbwstuttgart.typeinference.unify.*;
 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.util.BiRelation;
-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;
@@ -73,7 +66,7 @@ public class JavaTXCompiler {
 	Boolean resultmodel = true;
     public final Map<File, SourceFile> sourceFiles = new HashMap<>();
     Boolean log = false; //gibt an ob ein Log-File nach System.getProperty("user.dir")+""/logFiles/"" geschrieben werden soll?
-    public volatile UnifyTaskModel usedTasks = new UnifyTaskModel();
+    public UnifyTaskModelParallel usedTasks = new UnifyTaskModelParallel();
     private final DirectoryClassLoader classLoader;
     static Writer statistics;
    
@@ -89,8 +82,8 @@ public class JavaTXCompiler {
 	}
     public JavaTXCompiler(List<File> sources, List<File> contextPath) throws IOException, ClassNotFoundException {
     	//statistics = new FileWriter(new File(System.getProperty("user.dir") + "/" + sources.get(0).getName() + "_"+ new Timestamp(System.currentTimeMillis())));
-    	statistics = new OutputStreamWriter(new NullOutputStream());
-		statistics.write("test");
+		statistics = new OutputStreamWriter(new NullOutputStream());
+    	statistics.write("test");
         if(contextPath == null || contextPath.isEmpty()){
         	//When no contextPaths are given, the working directory is the sources root
 			contextPath = Lists.newArrayList(new File(System.getProperty("user.dir")));
@@ -376,7 +369,7 @@ public class JavaTXCompiler {
 	 * }
 	 */
 
-	public UnifyResultModel typeInferenceAsync(UnifyResultListener resultListener, Writer logFile)
+	public UnifyResultModelParallel typeInferenceAsync(UnifyResultListener resultListener, Writer logFile)
 			throws ClassNotFoundException, IOException {
 		List<ClassOrInterface> allClasses = new ArrayList<>();// environment.getAllAvailableClasses();
 		// Alle Importierten Klassen in allen geparsten Sourcefiles kommen ins FC
@@ -389,7 +382,7 @@ public class JavaTXCompiler {
 
 		final ConstraintSet<Pair> cons = getConstraints();
 		Set<Set<UnifyPair>> results = new HashSet<>();
-		UnifyResultModel urm = null;
+		UnifyResultModelParallel urm = null;
 		// urm.addUnifyResultListener(resultListener);
 		try {
 			logFile = logFile == null
@@ -397,7 +390,7 @@ public class JavaTXCompiler {
 					: logFile;
 			IFiniteClosure finiteClosure = UnifyTypeFactory.generateFC(allClasses, logFile, classLoader);
 			System.out.println(finiteClosure);
-			urm = new UnifyResultModel(cons, finiteClosure);
+			urm = new UnifyResultModelParallel(cons, finiteClosure);
 			urm.addUnifyResultListener(resultListener);
 			ConstraintSet<UnifyPair> unifyCons = UnifyTypeFactory.convert(cons);
 
@@ -727,7 +720,7 @@ public class JavaTXCompiler {
 			}).collect(Collectors.toCollection(ArrayList::new))*/;
 			if (resultmodel) {
 				/* UnifyResultModel Anfang */
-				UnifyResultModel urm = new UnifyResultModel(cons, finiteClosure);
+				UnifyResultModelParallel urm = new UnifyResultModelParallel(cons, finiteClosure);
 				UnifyResultListenerImpl li = new UnifyResultListenerImpl();
 				urm.addUnifyResultListener(li);
 				unify.unifyParallel(unifyCons.getUndConstraints(), oderConstraints, finiteClosure, logFile, log, urm,
@@ -745,7 +738,7 @@ public class JavaTXCompiler {
 				// oderConstraints, finiteClosure, logFile, log, new UnifyResultModel(cons,
 				// finiteClosure));
 				Set<Set<UnifyPair>> result = unify.unifyOderConstraints(unifyCons.getUndConstraints(), oderConstraints,
-						finiteClosure, logFile, log, new UnifyResultModel(cons, finiteClosure), usedTasks);
+						finiteClosure, logFile, log, new UnifyResultModelParallel(cons, finiteClosure), usedTasks);
 				System.out.println("RESULT: " + result);
 				logFile.write("RES: " + result.toString() + "\n");
 				logFile.flush();

src/main/java/de/dhbwstuttgart/typeinference/unify/RuleSet.java

@@ -9,6 +9,7 @@ import java.util.Optional;
 import java.util.Queue;
 import java.util.Set;
 import java.util.Stack;
+import java.util.concurrent.ForkJoinPool;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
@@ -44,14 +45,14 @@ import org.apache.commons.io.output.NullOutputStream;
  */
 public class RuleSet implements IRuleSet{
 	
-	Writer logFile;
+	WriterActiveObject logFile;
 	
 	public RuleSet() {
 		super();
-		logFile = new OutputStreamWriter(new NullOutputStream());
+		logFile = new WriterActiveObject(new OutputStreamWriter(new NullOutputStream()), ForkJoinPool.commonPool());
 	}
 	
-	RuleSet(Writer logFile) {
+	RuleSet(WriterActiveObject logFile) {
 		this.logFile = logFile;
 	}
 	
@@ -867,14 +868,8 @@ public class RuleSet implements IRuleSet{
         								   UnifyType r = x.getRhsType();
         								   if (r instanceof PlaceholderType) { ((PlaceholderType)r).disableWildcardtable(); }
 								     } );
-		try {
-			logFile.write("FUNgreater: " + pair + "\n");
-				logFile.write("FUNred: " + result + "\n");
-				logFile.flush();
-			}
-		catch (IOException e) {
-			System.out.println("logFile-Error");
-		}
+		logFile.write("FUNgreater: " + pair + "\n");
+		logFile.write("FUNred: " + result + "\n");
 		return Optional.of(result);
 	}
 	
@@ -917,14 +912,10 @@ public class RuleSet implements IRuleSet{
 									   UnifyType r = x.getRhsType();
 									   if (r instanceof PlaceholderType) { ((PlaceholderType)r).disableWildcardtable(); }
 									 } );
-		try {
-			logFile.write("FUNgreater: " + pair + "\n");
-			logFile.write("FUNgreater: " + result + "\n");
-			logFile.flush();
-		}
-	catch (IOException e) {
-		System.out.println("lofFile-Error");
-	}
+
+		logFile.write("FUNgreater: " + pair + "\n");
+		logFile.write("FUNgreater: " + result + "\n");
+
 		return Optional.of(result);
 	}
 
@@ -967,14 +958,9 @@ public class RuleSet implements IRuleSet{
 		   							   UnifyType r = x.getRhsType();
 		   							   if (r instanceof PlaceholderType) { ((PlaceholderType)r).disableWildcardtable(); }
 									 } );
-		try {
-			logFile.write("FUNgreater: " + pair + "\n");
-			logFile.write("FUNsmaller: " + result + "\n");
-			logFile.flush();
-		}
-	catch (IOException e) {
-		System.out.println("lofFile-Error");
-	}
+
+		logFile.write("FUNgreater: " + pair + "\n");
+		logFile.write("FUNsmaller: " + result + "\n");
 		return Optional.of(result);
 	}
 

src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify.java

@@ -1,19 +1,12 @@
 package de.dhbwstuttgart.typeinference.unify;
 
-import java.io.FileWriter;
-import java.io.IOException;
 import java.io.Writer;
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.ForkJoinPool;
 
-import de.dhbwstuttgart.core.JavaTXCompiler;
 import de.dhbwstuttgart.typeinference.constraints.Constraint;
-import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
-import de.dhbwstuttgart.typeinference.constraints.Pair;
 import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
-import de.dhbwstuttgart.typeinference.unify.model.FiniteClosure;
 import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
 
 public class TypeUnify {
@@ -26,21 +19,15 @@ public class TypeUnify {
 	 * @param fc
 	 * @param logFile
 	 * @param log
-	 * @param cons
 	 * @return
 	 */
-	public Set<Set<UnifyPair>> unify(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModel ret, UnifyTaskModel usedTasks) {
-		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, true, logFile, log, 0, ret, usedTasks);
-		ForkJoinPool pool = new ForkJoinPool();
+	public Set<Set<UnifyPair>> unify(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModelParallel resultModel, UnifyTaskModelParallel taskModel) {
+		ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors(), ForkJoinPool.defaultForkJoinWorkerThreadFactory, null, true);
+		taskModel.setPool(pool);
+		resultModel.setPool(pool);
+		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, true, new WriterActiveObject(logFile, pool), log, resultModel, pool);
 		pool.invoke(unifyTask);
 		Set<Set<UnifyPair>> res =  unifyTask.join();
-		try {
-			logFile.write("\nnoShortendElements: " + unifyTask.noShortendElements + "\n");
-			logFile.flush();
-		}
-		catch (IOException e) {
-			System.err.println("no log-File");
-		}
 		return res;
 	}
 	
@@ -51,15 +38,15 @@ public class TypeUnify {
 	 * @param fc
 	 * @param logFile
 	 * @param log
-	 * @param cons
-	 * @param ret
 	 * @return
 	 */
-	public UnifyResultModel unifyAsync(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModel ret, UnifyTaskModel usedTasks) {
-		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, true, logFile, log, 0, ret, usedTasks);
-		ForkJoinPool pool = new ForkJoinPool();
+	public UnifyResultModelParallel unifyAsync(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModelParallel resultModel, UnifyTaskModelParallel taskModel) {
+		ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors(), ForkJoinPool.defaultForkJoinWorkerThreadFactory, null, true);
+		taskModel.setPool(pool);
+		resultModel.setPool(pool);
+		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, true, new WriterActiveObject(logFile, pool), log, resultModel, pool);
 		pool.invoke(unifyTask);
-		return ret;
+		return resultModel;
 	}
 	
 	/**
@@ -69,26 +56,19 @@ public class TypeUnify {
 	 * @param fc
 	 * @param logFile
 	 * @param log
-	 * @param cons
-	 * @param ret
 	 * @return
 	 */
-	public UnifyResultModel unifyParallel(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModel ret, UnifyTaskModel usedTasks) {
+	public UnifyResultModelParallel unifyParallel(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModelParallel resultModel, UnifyTaskModelParallel taskModel) {
+		ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors(), ForkJoinPool.defaultForkJoinWorkerThreadFactory, null, true);
+		taskModel.setPool(pool);
+		resultModel.setPool(pool);
 		TypeUnifyTask unifyTask = //new TypeUnifyTask(undConstrains, oderConstraints, fc, true, logFile, log, 0, ret, usedTasks);
-				new TypeUnifyTask(undConstrains, oderConstraints, fc, true, logFile, log, 0, ret, usedTasks, statistics);
-		ForkJoinPool pool = new ForkJoinPool();
+				new TypeUnifyTask(undConstrains, oderConstraints, fc, true, new WriterActiveObject(logFile, pool), log, resultModel, pool, statistics);
+
 		pool.invoke(unifyTask);
-		Set<Set<UnifyPair>> res =  unifyTask.join();
-		try {
-			logFile.write("\nnoShortendElements: " + unifyTask.noShortendElements +"\n");
-			logFile.flush();
-			unifyTask.statistics.write("Backtracking: " + unifyTask.noBacktracking);
-			unifyTask.statistics.write("\nLoops: " + unifyTask.noLoop);
-		}
-		catch (IOException e) {
-			System.err.println("no log-File");
-		}
-		return ret;
+		unifyTask.join();
+
+		return resultModel;
 	}
 	
 	/*
@@ -106,20 +86,13 @@ public class TypeUnify {
 	 * @param fc
 	 * @param logFile
 	 * @param log
-	 * @param cons
 	 * @return
 	 */
-	public Set<Set<UnifyPair>> unifyOderConstraints(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModel ret, UnifyTaskModel usedTasks) {
-		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, false, logFile, log, 0, ret, usedTasks);
-		unifyTask.statistics = statistics;
+	public Set<Set<UnifyPair>> unifyOderConstraints(Set<UnifyPair> undConstrains, List<Set<Constraint<UnifyPair>>> oderConstraints, IFiniteClosure fc, Writer logFile, Boolean log, UnifyResultModelParallel resultModel, UnifyTaskModelParallel taskModel) {
+		resultModel.setPool(ForkJoinPool.commonPool());
+		TypeUnifyTask unifyTask = new TypeUnifyTask(undConstrains, oderConstraints, fc, false, new WriterActiveObject(logFile, ForkJoinPool.commonPool()), log, resultModel, ForkJoinPool.commonPool());
+		unifyTask.statisticsFile = statistics;
 		Set<Set<UnifyPair>> res = unifyTask.compute();
-		try {
-			logFile.write("\nnoShortendElements: " + unifyTask.noShortendElements +"\n");
-			logFile.flush();
-		}
-		catch (IOException e) {
-			System.err.println("no log-File");
-		}
 		return res;
 	}
 

src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnify2Task.java

@@ -1,16 +1,11 @@
 package de.dhbwstuttgart.typeinference.unify;
 
-import java.io.FileWriter;
-import java.io.IOException;
 import java.io.Writer;
-import java.util.ArrayList;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.concurrent.ForkJoinPool;
 
 import de.dhbwstuttgart.typeinference.constraints.Constraint;
-import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
-import de.dhbwstuttgart.typeinference.constraints.Pair;
 import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
 import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
 
@@ -20,17 +15,17 @@ public class TypeUnify2Task extends TypeUnifyTask {
        Set<UnifyPair> methodSignatureConstraintUebergabe;
 
        //statistics
-       TypeUnify2Task(Set<Set<UnifyPair>> setToFlatten, Set<UnifyPair> eq, 
-    		   List<Set<Constraint<UnifyPair>>> oderConstraints, 
-    		   Set<UnifyPair> nextSetElement, 
-    		   IFiniteClosure fc, boolean parallel, Writer logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks, 
-    		   Set<UnifyPair> methodSignatureConstraintUebergabe, Writer statistics) {
-    	   this(setToFlatten, eq, oderConstraints, nextSetElement, fc, parallel, logFile, log, rekTiefe, urm, usedTasks, methodSignatureConstraintUebergabe );
+       TypeUnify2Task(Set<Set<UnifyPair>> setToFlatten, Set<UnifyPair> eq,
+                      List<Set<Constraint<UnifyPair>>> oderConstraints,
+                      Set<UnifyPair> nextSetElement,
+                      IFiniteClosure fc, boolean parallel, WriterActiveObject logFile, Boolean log, UnifyResultModelParallel urm,
+                      Set<UnifyPair> methodSignatureConstraintUebergabe, ForkJoinPool pool, Writer statistics) {
+    	   this(setToFlatten, eq, oderConstraints, nextSetElement, fc, parallel, logFile, log, urm, methodSignatureConstraintUebergabe, pool );
     	   
        }
        
-       public TypeUnify2Task(Set<Set<UnifyPair>> setToFlatten, Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, Set<UnifyPair> nextSetElement, IFiniteClosure fc, boolean parallel, Writer logFile, Boolean log, int rekTiefe, UnifyResultModel urm, UnifyTaskModel usedTasks, Set<UnifyPair> methodSignatureConstraintUebergabe) {
-               super(eq, oderConstraints, fc, parallel, logFile, log, rekTiefe, urm, usedTasks);
+       public TypeUnify2Task(Set<Set<UnifyPair>> setToFlatten, Set<UnifyPair> eq, List<Set<Constraint<UnifyPair>>> oderConstraints, Set<UnifyPair> nextSetElement, IFiniteClosure fc, boolean parallel, WriterActiveObject logFile, Boolean log, UnifyResultModelParallel urm, Set<UnifyPair> methodSignatureConstraintUebergabe, ForkJoinPool pool) {
+               super(eq, oderConstraints, fc, parallel, logFile, log, urm, pool);
                this.setToFlatten = setToFlatten;
                this.nextSetElement = nextSetElement;
                this.methodSignatureConstraintUebergabe = methodSignatureConstraintUebergabe;
@@ -42,35 +37,21 @@ public class TypeUnify2Task extends TypeUnifyTask {
        
        @Override
        protected Set<Set<UnifyPair>> compute() {
-               if (one) {
-                       System.out.println("two");
-               }
-               one = true;
-               Set<Set<UnifyPair>> res = unify2(setToFlatten, eq, oderConstraintsField, fc, parallel, rekTiefeField, methodSignatureConstraintUebergabe);
+               Set<Set<UnifyPair>> res = unify2(setToFlatten, eq, oderConstraintsField, fc, parallel, methodSignatureConstraintUebergabe);
                /*if (isUndefinedPairSetSet(res)) { 
                        return new HashSet<>(); }
                else
                */ 
                //writeLog("xxx");
                //noOfThread--;
-               synchronized (usedTasks) {
-            	   if (this.myIsCancelled()) {
-   						return new HashSet<>();
-   					}
-   					else {
-   						return res;
-   					}
-   				}
+           return res;
        	}
        
        public void closeLogFile() {
-
-           try {
-				logFile.close();
-			}
-			catch (IOException ioE) {
-				System.err.println("no log-File" + thNo);
-			}
-           
+           if(parallel){
+               logFile.close();
+           }else{
+               logFile.closeNonThreaded();
+           }
        }
 }

src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyResultModelParallel.java

@@ -0,0 +1,57 @@
+package de.dhbwstuttgart.typeinference.unify;
+
+import de.dhbwstuttgart.syntaxtree.factory.UnifyTypeFactory;
+import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
+import de.dhbwstuttgart.typeinference.constraints.Pair;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
+import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
+import de.dhbwstuttgart.typeinference.unify.model.PairOperator;
+import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
+
+import java.util.*;
+import java.util.concurrent.ForkJoinPool;
+import java.util.stream.Collectors;
+
+public class UnifyResultModelParallel {
+    private ForkJoinPool pool;
+    private ConstraintSet<Pair> cons;
+    private IFiniteClosure fc;
+    private List<UnifyResultListener> listeners = new ArrayList<>();
+
+    public UnifyResultModelParallel(ConstraintSet<Pair> cons, IFiniteClosure fc){
+        this.cons = cons;
+        this.fc = fc;
+    }
+
+    public void setPool(ForkJoinPool pool){
+        this.pool = pool;
+    }
+    public void addUnifyResultListener(UnifyResultListener listenerToAdd) {
+        listeners.add(listenerToAdd);
+    }
+    public void removeUnifyResultListener(UnifyResultListener listenerToRemove) {
+        listeners.remove(listenerToRemove);
+    }
+    public void notify(Set<Set<UnifyPair>> eqPrimePrimeSet){
+        pool.execute(()->{
+            Set<Set<UnifyPair>> eqPrimePrimeSetRet = eqPrimePrimeSet.stream().map(x -> {
+                Optional<Set<UnifyPair>> res = new RuleSet().subst(x.stream().map(y -> {
+                    if (y.getPairOp() == PairOperator.SMALLERDOTWC) y.setPairOp(PairOperator.EQUALSDOT);
+                    return y; //alle Paare a <.? b erden durch a =. b ersetzt
+                }).collect(Collectors.toCollection(HashSet::new)));
+                if (res.isPresent()) {//wenn subst ein Erg liefert wurde was veraendert
+                    return new TypeUnifyTask().applyTypeUnificationRules(res.get(), fc);
+                }
+                else return x; //wenn nichts veraendert wurde wird x zurueckgegeben
+            }).collect(Collectors.toCollection(HashSet::new));
+            List<ResultSet> newResult = eqPrimePrimeSetRet.stream().map(unifyPairs ->
+                            new ResultSet(UnifyTypeFactory.convert(unifyPairs, de.dhbwstuttgart.typeinference.constraints.Pair.generateTPHMap(cons))))
+                    .collect(Collectors.toList());
+            UnifyResultEvent evt = new UnifyResultEvent(newResult);
+
+            for (UnifyResultListener listener : listeners) {
+                listener.onNewTypeResultFound(evt);
+            }
+        });
+    }
+}

src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyTaskModel.java

@@ -1,18 +0,0 @@
-package de.dhbwstuttgart.typeinference.unify;
-
-import java.util.ArrayList;
-
-public class UnifyTaskModel {
-
-	ArrayList<TypeUnifyTask> usedTasks = new ArrayList<>();
-	
-	public synchronized void add(TypeUnifyTask t) {
-		usedTasks.add(t);
-	}
-    
-    public synchronized void cancel() {
-    	for(TypeUnifyTask t : usedTasks) {
-    		t.myCancel(true);
-    	}
-    }
-}

src/main/java/de/dhbwstuttgart/typeinference/unify/UnifyTaskModelParallel.java

@@ -0,0 +1,17 @@
+package de.dhbwstuttgart.typeinference.unify;
+
+import java.util.concurrent.ForkJoinPool;
+
+public class UnifyTaskModelParallel {
+    private ForkJoinPool pool;
+
+    public void setPool(ForkJoinPool pool){
+        this.pool = pool;
+    }
+
+    public void cancel(){
+        if(this.pool != null) {
+            this.pool.shutdown();
+        }
+    }
+}

src/main/java/de/dhbwstuttgart/typeinference/unify/WriterActiveObject.java

@@ -0,0 +1,53 @@
+package de.dhbwstuttgart.typeinference.unify;
+
+import java.io.IOException;
+import java.io.Writer;
+import java.util.concurrent.ForkJoinPool;
+
+public class WriterActiveObject {
+    private Writer writer;
+    private ForkJoinPool pool;
+
+    public WriterActiveObject(Writer writer, ForkJoinPool pool){
+        this.writer = writer;
+        this.pool = pool;
+    }
+
+    public void close(){
+        pool.execute(()->{
+            try {
+                writer.close();
+            } catch (IOException e) {
+                System.out.println(e.getMessage());
+            }
+        });
+    }
+
+    public void write(String message){
+        pool.execute(()->{
+            try {
+                writer.write(message);
+                writer.flush();
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+        });
+    }
+
+    public void writeNonThreaded(String message){
+        try {
+            writer.write(message);
+            writer.flush();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public void closeNonThreaded(){
+        try {
+            writer.close();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

src/test/java/typeinference/UnifyTest.java

@@ -12,8 +12,8 @@ import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
 import de.dhbwstuttgart.typeinference.constraints.Pair;
 import de.dhbwstuttgart.typeinference.result.ResultSet;
 import de.dhbwstuttgart.typeinference.unify.TypeUnify;
-import de.dhbwstuttgart.typeinference.unify.UnifyResultModel;
-import de.dhbwstuttgart.typeinference.unify.UnifyTaskModel;
+import de.dhbwstuttgart.typeinference.unify.UnifyResultModelParallel;
+import de.dhbwstuttgart.typeinference.unify.UnifyTaskModelParallel;
 import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
 import de.dhbwstuttgart.typeinference.unify.model.*;
 import org.apache.commons.io.output.NullWriter;
@@ -34,6 +34,65 @@ public class UnifyTest {
 
     public static final String rootDirectory = System.getProperty("user.dir")+"/resources/javFiles/";
 
+    @Test
+    public void smallUnifyTest(){
+        UnifyType type1 = new PlaceholderType("a");
+        UnifyType type2 = new ReferenceType("List", new TypeParams(new PlaceholderType("b")));
+        UnifyPair pair1 = new UnifyPair(type1, type2, PairOperator.SMALLERDOT);
+
+        type1 = new ReferenceType("List", new TypeParams(new PlaceholderType("c")));
+        type2 = new PlaceholderType("a");
+        UnifyPair pair2 = new UnifyPair(type1, type2, PairOperator.SMALLERDOT);
+
+        type1 = new ReferenceType("String");
+        type2 = new PlaceholderType("b");
+        UnifyPair pair3 = new UnifyPair(type1, type2, PairOperator.SMALLERDOT);
+
+        type1 = new ReferenceType("Integer");
+        type2 = new PlaceholderType("c");
+        UnifyPair pair4 = new UnifyPair(type1, type2, PairOperator.SMALLERDOT);
+
+        Set<UnifyPair> undConstraints = new HashSet<>();
+        undConstraints.add(pair1);
+        undConstraints.add(pair2);
+        undConstraints.add(pair3);
+        undConstraints.add(pair4);
+
+        List<Set<Constraint<UnifyPair>>> oderConstraints = new ArrayList<>();
+
+        Set<UnifyPair> constraints = new HashSet<>();
+        type1 = new ReferenceType("Object");
+        type2 = new ReferenceType("String");
+        constraints.add(new UnifyPair(type2, type1, PairOperator.SMALLER));
+        type1 = new ReferenceType("Number");
+        type2 = new ReferenceType("Integer");
+        constraints.add(new UnifyPair(type2, type1, PairOperator.SMALLER));
+        type1 = new ReferenceType("Object");
+        type2 = new ReferenceType("Number");
+        constraints.add(new UnifyPair(type2, type1, PairOperator.SMALLER));
+       /* type1 = new ReferenceType("AbstractList", new TypeParams(new PlaceholderType("X")));
+        type2 = new ReferenceType("List", new TypeParams(new PlaceholderType("X")));
+        constraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        type1 = new ReferenceType("Object");
+        type2 = new ReferenceType("AbstractList", new TypeParams(new PlaceholderType("X")));
+        constraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));*/
+        type1 = new ReferenceType("AbstractList", new PlaceholderType("X"));
+        type2 = new ReferenceType("List", new PlaceholderType("X"));
+        constraints.add(new UnifyPair(type2, type1, PairOperator.SMALLER));
+        type1 = new ReferenceType("Object");
+        type2 = new ReferenceType("AbstractList", new PlaceholderType("X"));
+        constraints.add(new UnifyPair(type2, type1, PairOperator.SMALLER));
+
+        IFiniteClosure finiteClosure = new FiniteClosure(constraints, new NullWriter());
+
+        TypeUnify unifyAlgo = new TypeUnify();
+        ConstraintSet< Pair> cons = new ConstraintSet<>();
+        UnifyResultModelParallel urm = new UnifyResultModelParallel(cons, finiteClosure);
+        UnifyTaskModelParallel tasks = new UnifyTaskModelParallel();
+        Set<Set<UnifyPair>> solution = unifyAlgo.unify(undConstraints, oderConstraints, finiteClosure, new NullWriter(), false, urm, tasks);
+        System.out.println(solution.size());
+    }
+
     private UnifyPair genPairListOfInteger(String name){
 
         UnifyType type1 = new PlaceholderType(name);
@@ -90,9 +149,9 @@ public class UnifyTest {
         IFiniteClosure finiteClosure = new FiniteClosure(constraints, new NullWriter());
 
         TypeUnify unifyAlgo = new TypeUnify();
-        ConstraintSet<Pair> cons = new ConstraintSet<>();
-        UnifyResultModel urm = new UnifyResultModel(cons, finiteClosure);
-        UnifyTaskModel tasks = new UnifyTaskModel();
+        ConstraintSet< Pair> cons = new ConstraintSet<>();
+        UnifyResultModelParallel urm = new UnifyResultModelParallel(cons, finiteClosure);
+        UnifyTaskModelParallel tasks = new UnifyTaskModelParallel();
         Set<Set<UnifyPair>> solution = unifyAlgo.unify(undConstraints, oderConstraints, finiteClosure, new NullWriter(), false, urm, tasks);
         System.out.println(solution.size());
         System.out.println(solution);