// XAAL toolkit
// Copyright (C) 2009 Ville Karavirta <vkaravir(a)cs.hut.fi>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
package xaal.objects.structures;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

import xaal.objects.AddStructure;
import xaal.objects.Xaal;

/**
 * @author vkaravir
 *
 * To change the template for this generated type comment go to
 * Window&gt;Preferences&gt;Java&gt;Code Generation&gt;Code and Comments
 */
public class Node extends Structure implements AddStructure {

    private Structure content;
    private String label;
    private DataStructure parent;
    /**
     * 
     */
    public Node(Xaal xaalDoc, DataStructure parent) {
        super(xaalDoc);
        this.parent = parent;
    }

    
    /**
     * @return Returns the content.
     */
    public Structure getContent() {
        return content;
    }
    /**
     * @param content The content to set.
     */
    public void setContent(Structure content) {
        if (content instanceof Edge) {
            // TODO Common error logging - reference as node content
            return;
        }
        if (content instanceof Node)
            this.content = (Structure) ((Node)content).getContent();
        this.content = content;
    }
    /**
     * @return Returns the label.
     */
    public String getLabel() {
        return label;
    }
    /**
     * @param label The label to set.
     */
    public void setLabel(String label) {
        this.label = label;
    }

    public void addStructure(DataStructure ds) {
        setContent(ds);
    }
    
    public void addStructure(Structure s) {
        setContent(s);
    }


    /**
     * @return
     */
    public boolean isLabeled() {
        return (label != null);
    }
    
    public DataStructure getParent() {
        return parent;
    }


	public Iterator getStructures() {
		List l = new LinkedList();
		l.add(content);
		return l.iterator();
	}
}