Cd_graph {
{{

 public HashMap parents = new HashMap();

 public String getParent(String pname) {
    	return (String) parents.get(String.valueOf(pname));
 }

 public void multipleInheritance(ClassGraph cg) { 
 	Strategy sg = new Strategy("from Cd_graph through Term_Bar_list to Vertex");
 	TraversalGraph tg = new TraversalGraph(sg,cg);
    
    	tg.traverse( this, new Visitor() {
		Ident curAdj;
      public void start() {
		// Starts as empty
       	curAdj = new Ident("");
	}
  
	public void before(Adjacency host){
		curAdj = host.get_source().get_vertex_name();
	}
      
	public void before(Vertex host) {
        // get parent of host
        String parent = getParent(host.get_vertex_name().toString());

        if ( parent == null ) {
          // Put in hashmap
		parents.put( host.get_vertex_name().toString(), curAdj.toString() );
        } 
	  else { 
          	if( parent != curAdj.toString() )
               	System.err.println("*** ERROR DETECTED: The class "+ host.get_vertex_name().toString() +
                        " has two super classes: " + parent + ", " + 
                        curAdj.toString() + "." );
        }

        
      } 
    }); 

 } 

}}

}