/*

  * 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.jsf;

 import javax.faces.component.UIComponent;

 import javax.faces.view.facelets.FaceletContext;

 import javax.faces.view.facelets.MetaRule;

 import javax.faces.view.facelets.Metadata;

 import javax.faces.view.facelets.MetadataTarget;

 import javax.faces.view.facelets.TagAttribute;

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

 /**

  *

  * @author Leonardo Uribe

  */

 final class PassthroughRuleImpl extends MetaRule implements PassthroughRule

 {

     final static class LiteralAttributeMetadata extends Metadata

     {

         private final String _name;

         private final String _value;

         public LiteralAttributeMetadata(String name, String value)

         {

             _name = name;

             _value = value;

         }

         public void applyMetadata(FaceletContext ctx, Object instance)

         {

             ((UIComponent) instance).getPassThroughAttributes().put(_name, _value);

         }

     }

     final static class ValueExpressionMetadata extends Metadata

     {

         private final String _name;

         private final TagAttribute _attr;

         private final Class<?> _type;

         public ValueExpressionMetadata(String name, Class<?> type, TagAttribute attr)

         {

             _name = name;

             _attr = attr;

             _type = type;

         }

         public void applyMetadata(FaceletContext ctx, Object instance)

         {

             ((UIComponent) instance).getPassThroughAttributes().put(

                 _name, _attr.getValueExpression(ctx, _type));

         }

     }

     public final static PassthroughRuleImpl INSTANCE = new PassthroughRuleImpl();

     public PassthroughRuleImpl()

     {

         super();

     }

     public Metadata applyRule(String name, TagAttribute attribute, MetadataTarget meta)

     {

         if (meta.isTargetInstanceOf(UIComponent.class))

         {

             // if component and dynamic, then must set expression

             if (!attribute.isLiteral())

             {

                 Class<?> type = meta.getPropertyType(name);

                 if (type == null)

                 {

                     type = Object.class;

                 }

                 // if "class" is used, set type as Object (do not confuse with getClass()). 

                 if ("class".equalsIgnoreCase(name))

                 {

                     type = Object.class;

                 }

                 return new ValueExpressionMetadata(name, type, attribute);

             }

             else

             {

                 return new LiteralAttributeMetadata(name, attribute.getValue());

             }

         }

         return null;

     }

 }