/*

  * 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.util.logging.Level;

 import java.util.logging.Logger;

 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;

 /**

  * Copy of org.apache.myfaces.view.facelets.tag.jsf.ComponentRule

  * used for composite components.

  * 

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

  * @version $Revision$ $Date$

  */

 final class CompositeComponentRule extends MetaRule

 {

     final 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).getAttributes().put(_name, _value);

         }

     }

     final class TypedLiteralAttributeMetadata extends Metadata

     {

         private final String _name;

         private final TagAttribute _attr;

         private final Class<?> _type;

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

         {

             _name = name;

             _attr = attr;

             _type = type;

         }

         public void applyMetadata(FaceletContext ctx, Object instance)

         {

             ((UIComponent) instance).getAttributes().put(_name, _attr.getObject(ctx, _type));

         }

     }

     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)

         {

             // Call setValueExpression to set ValueExpression instances

             // cause problems later because when getAttributes().get() is called

             // it is evaluated. put the ValueExpression directly on the map

             // prevents it and does not cause any side effects.

             // Maybe we should call setValueExpression when the getter and 

             // setter exists on the component class.

             //((UIComponent) instance).getAttributes().put(_name, _attr.getValueExpression(ctx, _type));

             ((UIComponent) instance).setValueExpression(_name, _attr.getValueExpression(ctx, _type));

             //((UIComponent) instance).setValueExpression(_name, 

             //        ctx.getFacesContext().getApplication().

             //        getExpressionFactory().createValueExpression(

             //                _attr.getValueExpression(ctx, _type), ValueExpression.class));

         }

     }

     //private final static Logger log = Logger.getLogger("facelets.tag.component");

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

     public final static CompositeComponentRule INSTANCE = new CompositeComponentRule();

     public CompositeComponentRule()

     {

         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;

                 }

                 return new ValueExpressionMetadata(name, type, attribute);

             }

             else if (meta.getWriteMethod(name) == null)

             {

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

                 if (type == null)

                 {

                     if (meta.getProperty(name) == null)

                     {

                         // this was an attribute literal, but not property

                         warnAttr(attribute, meta.getTargetClass(), name);

                     }

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

                 }

                 else

                 {

                     return new TypedLiteralAttributeMetadata(name, type, attribute);

                 }

             }

         }

         return null;

     }

     private static void warnAttr(TagAttribute attr, Class<?> type, String n)

     {

         if (log.isLoggable(Level.FINER))

         {

             log.finer(attr + " Property '" + n + "' is not on type: " + type.getName());

         }

     }

 }