/*

  * 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.view.facelets.tag.composite;

 import java.beans.BeanDescriptor;

 import java.beans.IntrospectionException;

 import java.beans.PropertyDescriptor;

 import java.io.IOException;

 import java.util.HashMap;

 import java.util.Map;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import javax.faces.component.UIComponent;

 import javax.faces.view.Location;

 import javax.faces.view.facelets.FaceletContext;

 import javax.faces.view.facelets.TagConfig;

 import javax.faces.view.facelets.TagException;

 import javax.faces.view.facelets.TagHandler;

 import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFFaceletTag;

 import org.apache.myfaces.view.facelets.AbstractFaceletContext;

 import org.apache.myfaces.view.facelets.FaceletCompositionContext;

 /**

  * @author Leonardo Uribe (latest modification by $Author$)

  * @version $Revision$ $Date$

  */

 @JSFFaceletTag(name="composite:implementation")

 public class ImplementationHandler extends TagHandler

 {

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

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

     public final static String NAME = "implementation";

     public ImplementationHandler(TagConfig config)

     {

         super(config);

     }

     public void apply(FaceletContext ctx, UIComponent parent)

             throws IOException

     {

         if (!((AbstractFaceletContext)ctx).isBuildingCompositeComponentMetadata())

         {

             // If this tag is found in a facelet, the compiler has trimmed all

             // tags outside this one excluding composite:interface, so "parent"

             // is a component used as value for the facet key

             // UIComponent.COMPOSITE_FACET_NAME in a composite component. 

             nextHandler.apply(ctx, parent);

         }

         else

         {

             UIComponent compositeBaseParent

                     = FaceletCompositionContext.getCurrentInstance(ctx).getCompositeComponentFromStack();

             // Register the facet UIComponent.COMPOSITE_FACET_NAME

             CompositeComponentBeanInfo beanInfo = 

                 (CompositeComponentBeanInfo) compositeBaseParent.getAttributes()

                 .get(UIComponent.BEANINFO_KEY);

             if (beanInfo == null)

             {

                 if (log.isLoggable(Level.SEVERE))

                 {

                     log.severe("Cannot find composite bean descriptor UIComponent.BEANINFO_KEY ");

                 }

                 return;

             }

             BeanDescriptor beanDescriptor = beanInfo.getBeanDescriptor();

             Map<String, PropertyDescriptor> facetPropertyDescriptorMap = 

                 (Map<String, PropertyDescriptor>) beanDescriptor.getValue(UIComponent.FACETS_KEY);

             if (facetPropertyDescriptorMap == null)

             {

                 facetPropertyDescriptorMap = new HashMap<String, PropertyDescriptor>();

                 beanDescriptor.setValue(UIComponent.FACETS_KEY, facetPropertyDescriptorMap);

             }

             if (!facetPropertyDescriptorMap.containsKey(UIComponent.COMPOSITE_FACET_NAME))

             {

                 try

                 {

                     facetPropertyDescriptorMap.put(UIComponent.COMPOSITE_FACET_NAME, 

                             new CompositeComponentPropertyDescriptor(UIComponent.COMPOSITE_FACET_NAME));

                 }

                 catch (IntrospectionException e)

                 {

                     if (log.isLoggable(Level.SEVERE))

                     {

                         log.log(Level.SEVERE, "Cannot create PropertyDescriptor for facet ",e);

                     }

                     throw new TagException(tag,e);

                 }

             }

             // Pass to nextHandler, to give the chance to cc:insertChildren, cc:insertFacet and cc:renderFacet

             // to save metadata information.

             nextHandler.apply(ctx, parent);

         }

     }

     public Location getLocation()

     {

         return this.tag.getLocation();

     }

 }