View Javadoc

1   /*
2    * $Id: StringRenderer.java 1215008 2011-12-16 00:31:49Z nlebas $
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.request.render;
22  
23  import java.io.IOException;
24  
25  import org.apache.tiles.request.Request;
26  
27  /**
28   * Renders an attribute that contains a string.
29   *
30   * @version $Rev: 1215008 $ $Date: 2011-12-16 11:31:49 +1100 (Fri, 16 Dec 2011) $
31   */
32  public class StringRenderer implements Renderer {
33  
34      /** {@inheritDoc} */
35      @Override
36      public void render(String value, Request request) throws IOException {
37          if (value == null) {
38              throw new CannotRenderException("Cannot render a null string");
39          }
40          request.getWriter().write(value);
41      }
42  
43      /** {@inheritDoc} */
44      public boolean isRenderable(String value, Request request) {
45          return value != null;
46      }
47  }