/*
 *        JacORB - a free Java ORB
 *
 *   Copyright (C) 1997-98  Gerald Brose.
 *
 *   This library is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Library General Public
 *   License as published by the Free Software Foundation; either
 *   version 2 of the License, or (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *   Library General Public License for more details.
 *
 *   You should have received a copy of the GNU Library General Public
 *   License along with this library; if not, write to the Free
 *   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

package jacorb.naming.namemanager;

/**
 * 
 *	@author Gerald Brose, FU Berlin
 *	@version $Id: ContextNode.java,v 1.4 2000/03/31 10:21:01 brose Exp $
 */

import org.omg.CosNaming.*;
import java.util.*;
import jacorb.naming.*;
import javax.swing.tree.*;

public class ContextNode
{
    protected Binding[] contents;
    public boolean matched;
    public boolean used;

    public NamingContextExt context;
    private DefaultMutableTreeNode myDefaultNode;
    private DefaultTreeModel model;
    private Binding binding;
    private Vector bindingData;

    public ContextNode(NamingContextExt context, DefaultTreeModel model)
    { 
	used=false;
	this.model = model;
	this.context = context;
    }

    public ContextNode(NamingContextExt context, Binding b,DefaultTreeModel model)
    { 
	used=false;
	this.model = model;
	this.context = context;
	binding = b;
    }

    /**
     * 
     */
    public void display() 
    {
	update();
	if( bindingData != null )
	    NSTree.nsTable.setData( bindingData, this );
    }

    public boolean equals(ContextNode bnode)
    {
	return toString().equals(bnode.toString());
    }

    public NameComponent[] getName() 
    { 
	return binding.binding_name; 
    }
    /**
     * 
     * @param node javax.swing.tree.DefaultMutableTreeNode
     */
    public void setNode(DefaultMutableTreeNode node) 
    {
	this.myDefaultNode = node;
    }
	

    public String toString()
    {
	if( binding == null )
	    return "RootContext";
	else
	{
	    NameComponent[] name=binding.binding_name;
	    return name[name.length-1].id;
	}
    }

    /**
     * 
     * @param name java.lang.String
     */

    public void unbind(NameComponent [] nc) 
	throws org.omg.CosNaming.NamingContextPackage.NotFound,
	org.omg.CosNaming.NamingContextPackage.CannotProceed,
	org.omg.CosNaming.NamingContextPackage.InvalidName
    {
	context.unbind(nc);
    }

    /**
     * update the content of this node and all its children
     */
    public synchronized void update()
    {
	try
	{
	    BindingListHolder blsoh = new BindingListHolder();
	    BindingIteratorHolder bioh = new BindingIteratorHolder();
	    ContextNode context_node;
	
	    context.list( NSTree.MAX_BIND, blsoh, bioh);
	    Binding[] bindings=blsoh.value;
	
	    int childCount=myDefaultNode.getChildCount();
	
				// set up lists of object bindings and subcontext bindings
	
	    int context_count = 0;
	    int object_count = 0;
				
	    for (int i=0;i<bindings.length;i++)
	    {				
		if( bindings[i].binding_type == BindingType.ncontext )
		    context_count++;
		else
		    object_count++;
	    }
	
	    ContextNode[] contexts = new ContextNode[context_count];
	    Binding[] objects = new Binding[object_count];
	
	    for (int i=0;i<bindings.length;i++)
	    {			
		if( bindings[i].binding_type == BindingType.ncontext)
		    contexts[ --context_count ] = 
			new ContextNode(NamingContextExtHelper.narrow(context.resolve(bindings[i].binding_name)),bindings[i],model);
		else
		    objects[ --object_count ] = bindings[i];
	    }
				
				// Compare this node's sub contexts and mark those found in
				// the list of context bindings as used
				
	    for (int i=0;i<childCount;i++)
	    {
		DefaultMutableTreeNode dmtn=(DefaultMutableTreeNode)myDefaultNode.getChildAt(i);
		context_node=(ContextNode) dmtn.getUserObject();
		for (int j=0;j<contexts.length;j++)
		{	
		    if (context_node.equals(contexts[j]))
		    {
			context_node.matched=true;
			contexts[j].matched=true;
		    }
		}
	    }
	
				// Delete those child nodes that were not found in the
				// list
	
	    java.util.Vector removeList = new java.util.Vector();			
	    for (int i=0;i<childCount;i++)
	    {
		DefaultMutableTreeNode node=(DefaultMutableTreeNode) 
		    myDefaultNode.getChildAt(i);
		context_node=(ContextNode) node.getUserObject();
		if (!context_node.matched)
		{
		    removeList.addElement(node);
		}
		else 
		    context_node.matched=false;
	    }
	
	    int rsize = removeList.size();
	    for(int i=0; i < rsize; i++)
	    {
		model.removeNodeFromParent((DefaultMutableTreeNode)removeList.elementAt(i));
	    }
	
				// Insert new context nodes found in the list as
				// children of this tree node
				
	    for (int i=0;i<contexts.length;i++)
	    {
		if (!contexts[i].matched) 
		{
		    contexts[i].used=true;
	
		    DefaultMutableTreeNode node=new DefaultMutableTreeNode();
	
		    // tree node and context node need to know each other:
		    contexts[i].setNode(node);
		    node.setUserObject(contexts[i]);
		    node.setAllowsChildren(true);
		    model.insertNodeInto(node,myDefaultNode,0);
		}
	    }
	
	    bindingData = new Vector();
	
	    for( int i = 0; i < objects.length; i++ )
	    {
		NameComponent last = objects[i].binding_name[ objects[i].binding_name.length-1];
		NameComponent[] ncs = {last};
		jacorb.orb.ParsedIOR pior = null;
		try
		{
		    pior = ((jacorb.orb.Delegate)((org.omg.CORBA.portable.ObjectImpl)context.resolve(
		      		       			       ncs ))._get_delegate()).getParsedIOR();
		}
		catch( org.omg.CosNaming.NamingContextPackage.NotFound nf )
		{
		    // the named object could have disappeared from the 
		    // naming context in the meantime. If it has, we simply
		    // continue
		    continue;
		}
		Vector row = new Vector();

		row.addElement( last.id );
		row.addElement( last.kind);
		row.addElement( pior.getTypeId() );
		row.addElement( pior.getProfileBody().host );
					
		bindingData.addElement( row );
	    }
	
				// recursively update child nodes
				
	    childCount=myDefaultNode.getChildCount();
	    for (int i=0;i<childCount;i++)
	    {
		DefaultMutableTreeNode dmtn=(DefaultMutableTreeNode)
		    myDefaultNode.getChildAt(i);
		context_node=(ContextNode)dmtn.getUserObject();				
		Name name=new Name(bindings[i].binding_name);
		context_node.update();
	    }
	}
	catch (Exception e) 
	{
	    e.printStackTrace();
	}
    }
}



