/***************************** BEGIN LICENSE BLOCK ***************************

 The contents of this file are Copyright (C) 2011 Sensia Software LLC.
 All Rights Reserved.
 
 Contributor(s): 
    Alexandre Robin <alex.robin@sensiasoftware.com>
 
******************************* END LICENSE BLOCK ***************************/

package com.sensia.relaxNG;

import java.util.List;


/**
 * <p><b>Title:</b>
 * RNGChoice
 * </p>
 *
 * <p><b>Description:</b><br/>
 * TODO RNGChoice type description
 * </p>
 *
 * <p>Copyright (c) 2011</p>
 * @author Alexandre Robin
 * @date Sep 26, 2011
 */
public class RNGChoice extends RNGTagList
{
    private static final long serialVersionUID = -644155943333464599L;
    protected int selectedIndex = -1;
    
    
    public List<RNGTag> getItems()
    {
        return children;
    }
    
    
    public int getSelectedIndex()
    {
        return selectedIndex;
    }
    
    
    public void setSelectedIndex(int item)
    {
        this.selectedIndex = item;
    }
    
    
    public boolean isSelected()
    {
        return (selectedIndex >= 0 && selectedIndex < children.size());
    }
    
    
    public RNGTag getSelectedPattern()
    {
        if (isSelected())
            return children.get(selectedIndex);
        else
            return null;
    }
    
    
    @Override
    public void accept(RNGTagVisitor visitor)
    {
        visitor.visit(this);        
    }
    
    
    @Override
    public RNGChoice clone()
    {
        RNGChoice newTag = (RNGChoice)super.clone();
        newTag.selectedIndex = this.selectedIndex;
        return newTag;
    }


    @Override
    protected RNGTag newInstance()
    {
        return new RNGChoice();
    }
    
}