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1   /*
2    * $Id: AbstractTypeDetectingAttributeRenderer.java 821299 2009-10-03 12:15:05Z apetrelli $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   * http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  package org.apache.tiles.renderer.impl;
23  
24  import org.apache.tiles.Attribute;
25  import org.apache.tiles.context.TilesRequestContext;
26  import org.apache.tiles.evaluator.AttributeEvaluator;
27  import org.apache.tiles.renderer.TypeDetectingAttributeRenderer;
28  
29  /***
30   * Abstract implementation of {@link TypeDetectingAttributeRenderer} that
31   * implements {@link #isRenderable(Attribute, TilesRequestContext)} to delegate
32   * to {@link #isRenderable(Object, Attribute, TilesRequestContext)}.
33   *
34   * @version $Rev: 821299 $ $Date: 2009-10-03 14:15:05 +0200 (sab, 03 ott 2009) $
35   * @since 2.2.1
36   */
37  public abstract class AbstractTypeDetectingAttributeRenderer extends
38          AbstractBaseAttributeRenderer implements TypeDetectingAttributeRenderer {
39  
40      /*** {@inheritDoc} */
41      public boolean isRenderable(Attribute attribute, TilesRequestContext request) {
42          AttributeEvaluator evaluator = attributeEvaluatorFactory
43                  .getAttributeEvaluator(attribute);
44          Object value = evaluator.evaluate(attribute, request);
45          return isRenderable(value, attribute, request);
46      }
47  }