/*
 * Copyright (c) 2004, Stefan Walter
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *     * Redistributions of source code must retain the above
 *       copyright notice, this list of conditions and the
 *       following disclaimer.
 *     * Redistributions in binary form must reproduce the
 *       above copyright notice, this list of conditions and
 *       the following disclaimer in the documentation and/or
 *       other materials provided with the distribution.
 *     * The names of contributors to this software may not be
 *       used to endorse or promote products derived from this
 *       software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 *
 * CONTRIBUTORS
 *  Stef Walter <stef@memberwebs.com>
 *
 */

package com.memberwebs.ldapxml.map;

import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Map;



/**
 * Represents an &lt;entry&gt object in an LX map.
 *
 * @author stef@memberwebs.com
 * @version 0.5
 */
public class LXEntry
    extends LXBase
{
	private Map m_xmlMap;
	private Map m_nameMap;

    /**
     * Constructs a new LXEntry object.
     *
     * @param parent The parent of this entry in the LX map tree.
     */
    LXEntry(LXBase parent)
    {
        super(parent);
    }

    /**
     * Gets a class in this entry.
     *
     * @param name The name of the class.
     * @return The class, or null if no such class is present.
     */
    public LXClass getClass(String name)
    {
        LXClass cls = (LXClass)getChild(name);

        if(cls != null && !cls.isUseable())
            cls = null;

        return cls;
    }

	/**
	 * Resolve an XML name to an attribute.
	 */
	public LXAttribute resolveXMLName(String name)
	{
		loadNameMaps();
		return (LXAttribute)m_xmlMap.get(name);
	}

	public LXAttribute resolveName(String name)
	{
		loadNameMaps();
		return (LXAttribute)m_nameMap.get(name);
	}

	private void loadNameMaps()
	{
		// Note: This should never be called internally until the map
		// is completely built. It relies on the map remaining static
		// after this point, as there is no method for syncinc the
		// cached map created below.

		if(m_xmlMap == null || m_nameMap == null)
		{
			m_xmlMap = new Hashtable();
			m_nameMap = new Hashtable();

			Enumeration e = getChildNames();
			while(e != null && e.hasMoreElements())
			{
				LXClass cls = getClass((String)e.nextElement());

				Enumeration e2 = cls.getChildNames();
				while(e2 != null && e2.hasMoreElements())
				{
					LXAttribute attr = cls.getAttribute((String)e2.nextElement());
					if(attr != null)
					{
						m_xmlMap.put(attr.getXmlName(), attr);
						m_nameMap.put(attr.getName(), attr);
					}
				}
			}
		}
	}
};