/*
 * Moonlight|3D Copyright (C) 2005 The Moonlight|3D team
 * 
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 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 Lesser General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 * 
 * Created on Sep 20, 2005
 */
package ml.backend.sg;

import ml.core.exceptions.Exception;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class Reference extends Node {
    public String reference;

    public void setReference(String reference) 
    {
        this.reference=reference;
    }
    
    public String getReference()
    {
        return reference;
    }
    
    public Node getReferencedNode()
    {
        // find parent object:
        Node node=this;
        while(node.getParent()!=null) {
            node=node.getParent();
        }
        
        String[] segments=reference.split("/");
        
        for(int i=0;i<segments.length;i++) {
            node=(Node)node.findChildElement(segments[i]);
            if(node==null) {
                return null;
            }
        }
        
        return node;
    }
    
    public boolean isValidAppendixName(String appendix)
    {
        if(appendix.equals("reference")) {
            return true;
        }
        
        return false;
    }

    public Object getFromAppendix(String appendix)
    {
        if(appendix.equals("reference")) {
            return reference;
        }
        return null;
    }

	@Override
	public String getType() {
		return "Reference";
	}

	@Override
	public Node clone() {
		Reference reference = (Reference)super.clone();
		reference.reference=this.reference;
		return reference;
	}

	@Override
	protected void saveXMLData(Document document, Element dataElement) {
		super.saveXMLData(document,dataElement);
		Element element=document.createElement("reference");
		element.setAttribute("referencednode",reference);
		dataElement.appendChild(element);
	}

	@Override
	protected void loadXMLData(Element dataElement) throws Exception {
		super.loadXMLData(dataElement);
		Element element=(Element) dataElement.getElementsByTagName("reference").item(0);
		reference=element.getAttribute("referencednode");
	}
}