/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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.myfaces.renderkit;

 import java.util.HashMap;

 import java.util.Iterator;

 import java.util.Map;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import javax.faces.FacesException;

 import javax.faces.context.FacesContext;

 import javax.faces.render.RenderKit;

 import javax.faces.render.RenderKitFactory;

 /**

  * RenderKitFactory implementation as defined in Spec. JSF.7.3

  * 

  * @author Manfred Geiler (latest modification by $Author$)

  * @version $Revision$ $Date$

  */

 public class RenderKitFactoryImpl extends RenderKitFactory

 {

     //private static final Log log = LogFactory.getLog(RenderKitFactoryImpl.class);

     private static final Logger log = Logger.getLogger(RenderKitFactoryImpl.class.getName());

     private Map<String, RenderKit> _renderkits = new HashMap<String, RenderKit>();

     public RenderKitFactoryImpl()

     {

     }

     public void purgeRenderKit()

     {

         _renderkits.clear();

     }

     @Override

     public void addRenderKit(String renderKitId, RenderKit renderKit)

     {

         if (renderKitId == null)

         {

             throw new NullPointerException("renderKitId");

         }

         if (renderKit == null)

         {

             throw new NullPointerException("renderKit");

         }

         if (log.isLoggable(Level.INFO))

         {

             if (_renderkits.containsKey(renderKitId))

             {

                 log.info("RenderKit with renderKitId '" + renderKitId + "' was replaced.");

             }

         }

         _renderkits.put(renderKitId, renderKit);

     }

     @Override

     public RenderKit getRenderKit(FacesContext context, String renderKitId) throws FacesException

     {

         if (renderKitId == null)

         {

             throw new NullPointerException("renderKitId");

         }

         RenderKit renderkit = _renderkits.get(renderKitId);

         if (renderkit == null)

         {

             // throw new IllegalArgumentException("Unknown RenderKit '" + renderKitId + "'.");

             // JSF Spec API Doc says:

             // "If there is no registered RenderKit for the specified identifier, return null"

             // vs "IllegalArgumentException - if no RenderKit instance can be returned for the specified identifier"

             // First sentence is more precise, so we just log a warning

             log.warning("Unknown RenderKit '" + renderKitId + "'.");

         }

         return renderkit;

     }

     @Override

     public Iterator<String> getRenderKitIds()

     {

         return _renderkits.keySet().iterator();

     }

 }