/*
 * Copyright 2000-2001,2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jetspeed.om.registry.base;

import org.apache.jetspeed.om.registry.RegistryEntry;
import org.apache.jetspeed.om.registry.InvalidEntryException;
import org.apache.jetspeed.om.registry.RegistryException;
import org.apache.jetspeed.services.Registry;
import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
import org.apache.jetspeed.services.logging.JetspeedLogger;

/**
 * Extends BaseRegistry implementation to override object creation
 * method and ensure Registry object is synchronized with its
 * persistence backend by delegating actual addition/deletion of objects
 * to the registry service.
 * <p>To avoid loops, a RegistryService implementation using this class
 * nees to call the addLocalEntry/removeLocalEntry methods to modify
 * the in memory state of this Registry</p>
 *
 * @author <a href="mailto:raphael@apache.org">Raphaël Luta</a>
 * @version $Id: BaseSkinRegistry.java,v 1.4 2004/02/23 03:08:26 jford Exp $
 */
public class BaseSkinRegistry extends BaseRegistry
{

    /**
     * Static initialization of the logger for this class
     */    
    private static final JetspeedLogger logger = JetspeedLogFactoryService.getLogger(BaseSkinRegistry.class.getName());    
    
    /**
    @see Registry#setEntry
    */
    public void setEntry( RegistryEntry entry ) throws InvalidEntryException
    {
		// Delegate to the RegistryService to ensure correct handling of
		// persistence if using file fragments

		try
		{
			Registry.addEntry(Registry.SKIN, entry);
		}
		catch (RegistryException e)
		{
			logger.error("Exception", e);
		}
    }

    /**
    @see Registry#addEntry
    */
    public void addEntry( RegistryEntry entry ) throws InvalidEntryException
    {
		// Delegate to the RegistryService to ensure correct handling of
		// persistence if using file fragments

		try
		{
			Registry.addEntry(Registry.SKIN, entry);
		}
		catch (RegistryException e)
		{
			logger.error("Exception", e);
		}
    }

    /**
    @see Registry#removeEntry
    */
    public void removeEntry( String name )
    {
		// Delegate to the RegistryService to ensure correct handling of
		// persistence if using file fragments

		Registry.removeEntry(Registry.SKIN, name);
    }

    /**
    @see Registry#removeEntry
    */
    public void removeEntry( RegistryEntry entry )
    {
		// Delegate to the RegistryService to ensure correct handling of
		// persistence if using file fragments

		if (entry != null)
		{
			Registry.removeEntry(Registry.SKIN, entry.getName());
		}
    }

    /**
     * Creates a new RegistryEntry instance compatible with the current
     * Registry instance implementation
     *
     * @return the newly created RegistryEntry
     */
    public RegistryEntry createEntry()
    {
		return new BaseSkinEntry();
	}
}
