Fixed compilation errors

src/main/java/de/monticore/lang/monticar/cnnarch/_symboltable/ArchitectureSymbol.java

@@ -37,7 +37,7 @@ public class ArchitectureSymbol extends CommonScopeSpanningSymbol {
 
     public static final ArchitectureKind KIND = new ArchitectureKind();
 
-    private List<SerialCompositeElementSymbol> streams;
+    private List<SerialCompositeElementSymbol> streams = new ArrayList<>();
     private List<IOSymbol> inputs = new ArrayList<>();
     private List<IOSymbol> outputs = new ArrayList<>();
     private Map<String, IODeclarationSymbol> ioDeclarationMap = new HashMap<>();
@@ -52,6 +52,26 @@ public class ArchitectureSymbol extends CommonScopeSpanningSymbol {
         return streams;
     }
 
+    public List<SerialCompositeElementSymbol> getNetworkStreams() {
+        List<SerialCompositeElementSymbol> networkStreams = new ArrayList<>();
+        for (SerialCompositeElementSymbol stream : streams) {
+            if (stream.isNetwork()) {
+                networkStreams.add(stream);
+            }
+        }
+        return networkStreams;
+    }
+
+    public List<SerialCompositeElementSymbol> getNonNetworkStreams() {
+        List<SerialCompositeElementSymbol> nonNetworkStreams = new ArrayList<>();
+        for (SerialCompositeElementSymbol stream : streams) {
+            if (!stream.isNetwork()) {
+                nonNetworkStreams.add(stream);
+            }
+        }
+        return nonNetworkStreams;
+    }
+
     public void setStreams(List<SerialCompositeElementSymbol> streams) {
         this.streams = streams;
     }

src/main/java/de/monticore/lang/monticar/cnnarch/_symboltable/CNNArchSymbolTableCreator.java

@@ -251,8 +251,7 @@ public class CNNArchSymbolTableCreator extends de.monticore.symboltable.CommonSy
     @Override
     public void endVisit(ASTUnrollDeclaration ast) {
         UnrollDeclarationSymbol unrollDeclaration = (UnrollDeclarationSymbol) ast.getSymbolOpt().get();
-        unrollDeclaration.setBody((CompositeElementSymbol) ast.getBody().getSymbolOpt().get());
-
+        unrollDeclaration.setBody((SerialCompositeElementSymbol) ast.getBody().getSymbolOpt().get());
 
         List<VariableSymbol> parameters = new ArrayList<>(4);
         for (ASTLayerParameter astParam : ast.getParametersList()){

src/main/java/de/monticore/lang/monticar/cnnarch/_symboltable/CompositeElementSymbol.java

@@ -47,8 +47,7 @@ public abstract class CompositeElementSymbol extends ArchitectureElementSymbol {
             if (element instanceof CompositeElementSymbol) {
                 isNetwork |= ((CompositeElementSymbol) element).isNetwork();
             }
-            else if (element instanceof LayerSymbol)
-            {
+            else if (element instanceof LayerSymbol) {
                 isNetwork |= ((LayerSymbol) element).getDeclaration().isNetworkLayer();
             }
         }

src/main/java/de/monticore/lang/monticar/cnnarch/_symboltable/UnrollDeclarationSymbol.java

@@ -35,7 +35,7 @@ public class UnrollDeclarationSymbol extends CommonScopeSpanningSymbol {
     public static final UnrollDeclarationKind KIND = new UnrollDeclarationKind();
 
     private List<VariableSymbol> parameters;
-    private CompositeElementSymbol body;
+    private SerialCompositeElementSymbol body;
 
 
     protected UnrollDeclarationSymbol(String name) {
@@ -75,11 +75,11 @@ public class UnrollDeclarationSymbol extends CommonScopeSpanningSymbol {
         }
     }
 
-    public CompositeElementSymbol getBody() {
+    public SerialCompositeElementSymbol getBody() {
         return body;
     }
 
-    protected void setBody(CompositeElementSymbol body) {
+    protected void setBody(SerialCompositeElementSymbol body) {
         this.body = body;
     }
 
@@ -109,7 +109,7 @@ public class UnrollDeclarationSymbol extends CommonScopeSpanningSymbol {
             reset();
             set(layer.getArguments());
 
-            CompositeElementSymbol copy = getBody().preResolveDeepCopy();
+            SerialCompositeElementSymbol copy = getBody().preResolveDeepCopy();
             copy.putInScope(getSpannedScope());
             copy.resolveOrError();
             getSpannedScope().remove(copy);

src/main/java/de/monticore/lang/monticar/cnnarch/_symboltable/UnrollSymbol.java

@@ -142,7 +142,7 @@ public class UnrollSymbol extends ArchitectureElementSymbol {
 
                 if (!isActive() || maxSerialLength == 0) {
                     //set resolvedThis to empty composite to remove the layer.
-                    setResolvedThis(new CompositeElementSymbol.Builder().build());
+                    setResolvedThis(new SerialCompositeElementSymbol());
                 }
                 else if (parallelLength == 1 && maxSerialLength == 1) {
                     //resolve the layer call
@@ -186,10 +186,8 @@ public class UnrollSymbol extends ArchitectureElementSymbol {
             for (List<ArchitectureElementSymbol> serialElements : elements) {
                 serialComposites.add(createSerialSequencePart(serialElements));
             }
-            CompositeElementSymbol parallelElement = new CompositeElementSymbol.Builder()
-                    .parallel(true)
-                    .elements(serialComposites)
-                    .build();
+            ParallelCompositeElementSymbol parallelElement = new ParallelCompositeElementSymbol();
+            parallelElement.setElements(serialComposites);
 
             if (getAstNode().isPresent()) {
                 parallelElement.setAstNode(getAstNode().get());
@@ -203,10 +201,8 @@ public class UnrollSymbol extends ArchitectureElementSymbol {
             return elements.get(0);
         }
         else {
-            CompositeElementSymbol serialComposite = new CompositeElementSymbol.Builder()
-                    .parallel(false)
-                    .elements(elements)
-                    .build();
+            SerialCompositeElementSymbol serialComposite = new SerialCompositeElementSymbol();
+            serialComposite.setElements(elements);
 
             if (getAstNode().isPresent()){
                 serialComposite.setAstNode(getAstNode().get());