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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    * 
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.portals.bridges.groovy;
18  
19  import java.io.IOException;
20  
21  import javax.portlet.PortletException;
22  
23  import org.codehaus.groovy.control.CompilationFailedException;
24  
25  import org.apache.jetspeed.portlet.SupportsHeaderPhase;
26  import org.apache.jetspeed.portlet.PortletHeaderRequest;
27  import org.apache.jetspeed.portlet.PortletHeaderResponse;
28  
29  /***
30   * <p>
31   * GroovyPortletHeaderPhaseSupport parses and invokes a groovy-scripted portlet. A groovy-scripted
32   * portlet just need to be implemented like any other Java-based portlet. So, a
33   * groovy-scripted portlet does not support only full features of JSR-168 portlet, but
34   * it also supports JSR-286 header phase.
35   * 
36   * @author <a href="mailto:woon_san@yahoo.com">Woonsan Ko</a>
37   * @Id@
38   */
39  public class GroovyPortletHeaderPhaseSupport extends GroovyPortlet implements SupportsHeaderPhase
40  {
41      protected SupportsHeaderPhase scriptPortletInstanceWithHeaderPhase;
42      
43      public GroovyPortletHeaderPhaseSupport()
44      {
45          super();
46      }
47      
48      public void doHeader(PortletHeaderRequest request, PortletHeaderResponse response) throws PortletException
49      {
50          refreshPortletInstance();
51          
52          if (this.scriptPortletInstanceWithHeaderPhase != null)
53          {
54              this.scriptPortletInstanceWithHeaderPhase.doHeader(request, response);
55          }
56      }
57      
58      protected void createScriptPortletInstance() throws CompilationFailedException, InstantiationException,
59              IOException, IllegalAccessException, PortletException
60      {
61          super.createScriptPortletInstance();
62          
63          if (scriptPortletInstance instanceof SupportsHeaderPhase)
64          {
65              this.scriptPortletInstanceWithHeaderPhase = (SupportsHeaderPhase) scriptPortletInstance;
66          }
67      }
68  }