/*
    * 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.commons.converter;
  
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  
  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 javax.faces.view.facelets.TagAttributeException;
  
  final class _LocaleRule extends MetaRule {
  
      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) {
              this.name = name;
              this.attr = attr;
              this.type = type;
          }
  
          public void applyMetadata(FaceletContext ctx, Object instance) {
              ((ConverterBase) instance).setValueExpression(this.name, this.attr
                      .getValueExpression(ctx, this.type));
          }
  
      }
      
      final static class LiteralPropertyMetadata extends Metadata
      {
  
          private final Method method;
  
          private final TagAttribute attribute;
  
          private Object[] value;
  
          public LiteralPropertyMetadata(Method method, TagAttribute attribute)
          {
              this.method = method;
              this.attribute = attribute;
          }
  
          public void applyMetadata(FaceletContext ctx, Object instance)
          {
              if (value == null)
              {
                  String str = this.attribute.getValue();
                  value = new Object[] { org.apache.myfaces.commons.util.TagUtils.getLocale( str ) };
              }
              try
              {
                  method.invoke(instance, this.value);
              }
              catch (InvocationTargetException e)
              {
                  throw new TagAttributeException(this.attribute, e.getCause());
              }
              catch (Exception e)
              {
                  throw new TagAttributeException(this.attribute, e);
              }
          }
  
      }
  
      public final static _LocaleRule Instance = new _LocaleRule();
  
      public _LocaleRule() {
          super();
      }
  
      public Metadata applyRule(String name, TagAttribute attribute,
             MetadataTarget meta) {
         if (meta.isTargetInstanceOf(ConverterBase.class)) {
 
             if ("locale".equals(name))
             {
                 // if component and dynamic, then must set expression
                 if (!attribute.isLiteral()) {
                     return new ValueExpressionMetadata(name, Object.class, attribute);
                 }
                 else
                 {
                     Method m = meta.getWriteMethod(name);
 
                     return new LiteralPropertyMetadata(m, attribute);
                 }
             }
         }
         return null;
     }
 }