Main {
  public static void main(String args[]) throws Exception {{
    Examples c = Examples.parse(System.in);
    ClassGraph cg = new ClassGraph(true,false);
    cg = new ClassGraph(cg, "from Examples bypassing -> *,tail,* to *");
    Set dns = c.getDefinedNames(cg);
    Iterator it;
    System.out.println(" defined");
    it = dns.iterator();
    while (it.hasNext()) {
      String el = (String) it.next();
      System.out.println(" defined id " + el);
    }

    System.out.println(" undefined");
    Set udns = c.getUndefinedNames(cg);
    it = udns.iterator();
    while (it.hasNext()) {
      String el = (String) it.next();
      System.out.println(" undefined id " + el);
    }

    c.xyz(cg);

    TraversalGraph tg1;
    tg1 = new TraversalGraph(
    "from Collaboration to Java_MethodBody", cg);
      System.out.println(" TraversalGraph from Collaboration to Java_MethodBody ");
    System.out.println(tg1);
    System.out.println("========");

    tg1 = new TraversalGraph(
    "from Collaboration bypassing QualifiedClassName to ClassName", cg);
      System.out.println(" TraversalGraph from Collaboration bypassing QualifiedClassName to ClassName ");
    System.out.println(tg1);
    System.out.println("========");

    System.out.println("done");
    System.out.println("done");
  }}
}


Examples {
{{
  public Set getDefinedNames(ClassGraph cg) {
    final Set def = new HashSet();
    List defs =
      cg.asList(this, "from Examples to Collaboration");
    Iterator it = defs.iterator();
    while (it.hasNext()) {
      Collaboration el = (Collaboration) it.next();
      String cname = el.get_name().get_ident().toString();
      def.add(cname);
    }
    return def;
  }
  public Set getUndefinedNames(ClassGraph cg) {
    final Set def = getDefinedNames(cg);
    final Set undef = new HashSet();
    List used = 
      cg.asList(this, "from Examples to QualifiedClassName");
    Iterator it = used.iterator();
    while (it.hasNext()) {
      QualifiedClassName el = (QualifiedClassName) it.next();
      String cname = el.get_collname().get_ident().toString();
      if (!def.contains(cname))
        undef.add(cname);
    }
    return undef;
  }
  public void xyz(ClassGraph cg){
    cg.traverse(this,"from Examples to Collaboration", new Visitor(){
      int x;
      public void start(){x=0;}
      void before(Collaboration c){
	x++; 
	System.out.println("Collaboration " + 
	  c.get_name().get_ident() + " xyz " + x);
      } 
      void after(Collaboration c){
        x--;
      }
    });
  }
}}
}