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1   /*
2    * Copyright 2002,2004 The Apache Software Foundation.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.apache.commons.jelly.tags.jetty;
18  
19  import org.apache.commons.jelly.JellyTagException;
20  import org.apache.commons.jelly.TagSupport;
21  import org.apache.commons.jelly.XMLOutput;
22  
23  /***
24   * A resource handler that uses Jelly scripts to provide resources
25   * to a context in a Jetty http server
26   *
27   * @author  rtl
28   * @version $Id: JellyResourceHandlerTag.java 155420 2005-02-26 13:06:03Z dirkv $
29   */
30  public class JellyResourceHandlerTag extends TagSupport {
31  
32      /*** The http handler that calls the body of the tag. */
33      private JellyResourceHttpHandler _jellyResourceHttpHandler;
34  
35      /*** Creates a new instance of JellyResourceHandlerTag */
36      public JellyResourceHandlerTag() {
37      }
38  
39      /***
40       * Perform the tag functionality. In this case, add an http handler
41       * to the parent context that runs the script in the body of this tag
42       *
43       * @param xmlOutput where to send output
44       * @throws Exception when an error occurs
45       */
46      public void doTag(XMLOutput xmlOutput) throws JellyTagException {
47          HttpContextTag httpContext = (HttpContextTag) findAncestorWithClass(
48              HttpContextTag.class);
49          if ( httpContext == null ) {
50              throw new JellyTagException( "<jellyResourceHandler> tag must be enclosed inside a <httpContext> tag" );
51          }
52  
53          _jellyResourceHttpHandler =
54              new JellyResourceHttpHandler(xmlOutput);
55  
56          httpContext.addHandler(_jellyResourceHttpHandler);
57  
58          // process any child method handlers
59          invokeBody(xmlOutput);
60      }
61  
62      //--------------------------------------------------------------------------
63      // Property accessors/mutators
64      //--------------------------------------------------------------------------
65  
66      protected JellyResourceHttpHandler getJellyResourceHttpHandler() {
67          return _jellyResourceHttpHandler;
68      }
69  
70  }