/*
    * 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 com.sun.facelets.FaceletContext;
  import com.sun.facelets.el.LegacyValueBinding;
  import com.sun.facelets.tag.MetaRule;
  import com.sun.facelets.tag.Metadata;
  import com.sun.facelets.tag.MetadataTarget;
  import com.sun.facelets.tag.TagAttribute;
  
  final class _DateTimeConverterRule extends MetaRule {
  
      final static class ValueBindingMetadata extends Metadata {
  
          private final String name;
  
          private final TagAttribute attr;
  
          private final Class type;
  
          public ValueBindingMetadata(String name, Class type, TagAttribute attr) {
              this.name = name;
              this.attr = attr;
              this.type = type;
          }
  
          public void applyMetadata(FaceletContext ctx, Object instance) {
              ((DateTimeConverter) instance).setValueBinding(this.name,
                      new LegacyValueBinding(this.attr.getValueExpression(ctx,
                              this.type)));
          }
  
      }
  
      public final static _DateTimeConverterRule Instance = new _DateTimeConverterRule();
  
      public _DateTimeConverterRule() {
          super();
      }
  
      public Metadata applyRule(String name, TagAttribute attribute,
              MetadataTarget meta) {
          if (meta.isTargetInstanceOf(DateTimeConverter.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 ValueBindingMetadata(name, type, attribute);
              }
          }
          return null;
      }
  }