FlatteningVisitor {
  {{
    void before(Adjacency host) {
//      System.out.println("Flattening "+ host.getName());
    }

    void after(Adjacency host) {
//      System.out.println("Flattening of " + host.getName() + " is complete!");
    } 

    void before(Construct_ns host) {
      host.getParts();
      host.flatten();
    }

    void before(Alternat_ns host) {
      host.getParts();
      host.flatten();
    }

  }}
}

PartGatherVisitor {
  {{
    Set partStorage;

    PartGatherVisitor(Set store) {
      partStorage = store;
    }

    void before(Regular host) {
      String name = host.get_vertex().get_vertex().get_vertex_name().toString().toLowerCase().intern();
      if (partStorage.contains(name))
        //throw new RuntimeException("Part " + name + " already exists!");
        System.out.println("Part " + name + " already exists!");
      partStorage.add(name);
    }

    void before(Labeled host) {
      String name = host.get_label_name().toString().intern();
      if (partStorage.contains(name))
        //throw new RuntimeException("Part " + name + " already exists!");
        System.out.println("Part " + name + " already exists!");
      partStorage.add(name);
    }
  }}
}

SubclassGatherVisitor {
  {{
    Set subclassStorage;

    SubclassGatherVisitor(Set store) {
      subclassStorage = store;
    }

    void before(Vertex host) {
      String name = host.get_vertex_name().toString().intern();
      if (subclassStorage.contains(name))
        throw new RuntimeException();
      subclassStorage.add(name);
    }
  }}
}

SuperClassResolutionVisitor {
  {{
    String currentAdjName;
    boolean pass;

    void before(Adjacency host) {
      currentAdjName = host.getName();
    }

    void before(Alternat_ns host) {
      host.resolveSubclasses(currentAdjName);
    }

    void after(Adjacency host) {
      if (pass && host.isMultiInherit()) pass = false;
    }

    public Object getReturnValue() {
      return new Boolean(pass);
    }

    public void start() {
      pass = true;
    }

  }}
}

SuperClassChainResolutionVisitor {
  {{
    Set ignoredClasses = new HashSet();
    List cycles = new ArrayList(Cd_graph.adjs.size());
    
    void before (Adjacency host) {
      if (ignoredClasses.contains(host.getName())) return;
      List l = host.checkCycle();
      if (l != null) {
        cycles.add(l);
        Iterator iter = l.iterator();
        for (;iter.hasNext();ignoredClasses.add(iter.next()));
      }
    }

    public Object getReturnValue() {
      return cycles;
    }
  }}
}

ImportVisitor {
  {{
    String packageName;
    void before(Ident host) {
      if (packageName == null) {
        packageName = host.toString();
      } else { 
        packageName = packageName + "." + host.toString();
      }
    }

    void before(ImportAllClasses host) {
      packageName = packageName + ".*";
    }

    public Object getReturnValue() {
      return packageName;
    }
  }}
}