DefinitionAttributeRenderer xref

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1   /*
2    * $Id: DefinitionAttributeRenderer.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  package org.apache.tiles.renderer.impl;
22  
23  import java.io.IOException;
24  
25  import org.apache.tiles.Attribute;
26  import org.apache.tiles.TilesContainer;
27  import org.apache.tiles.awareness.TilesContainerAware;
28  import org.apache.tiles.context.TilesRequestContext;
29  
30  /***
31   * Renders an attribute that contains a reference to a definition.
32   *
33   * @version $Rev: 821299 $ $Date: 2009-10-03 14:15:05 +0200 (sab, 03 ott 2009) $
34   * @since 2.1.0
35   */
36  public class DefinitionAttributeRenderer extends
37          AbstractTypeDetectingAttributeRenderer implements TilesContainerAware {
38  
39      /***
40       * The Tiles container.
41       *
42       * @since 2.1.0
43       */
44      protected TilesContainer container;
45  
46      /*** {@inheritDoc} */
47      public void setContainer(TilesContainer container) {
48          this.container = container;
49      }
50  
51      /*** {@inheritDoc} */
52      @Override
53      public void write(Object value, Attribute attribute,
54              TilesRequestContext request)
55              throws IOException {
56          container.render(value.toString(), request.getRequestObjects());
57      }
58  
59      /*** {@inheritDoc} */
60      public boolean isRenderable(Object value, Attribute attribute,
61              TilesRequestContext request) {
62          if (value instanceof String) {
63              return container.isValidDefinition((String) value, request
64                      .getRequestObjects());
65          }
66          return false;
67      }
68  }