TemplateLinkTag xref

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1   package org.apache.jetspeed.services.jsp.tags;
2   
3   /*
4    * Copyright 2000-2001,2004 The Apache Software Foundation.
5    * 
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    * 
10   *      http://www.apache.org/licenses/LICENSE-2.0
11   * 
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  import javax.servlet.jsp.JspException;
20  import javax.servlet.jsp.PageContext;
21  import javax.servlet.jsp.tagext.TagSupport;
22  
23  // Turbine Classes 
24  import org.apache.turbine.util.RunData;
25  import org.apache.turbine.util.DynamicURI;
26  import org.apache.turbine.util.template.TemplateLink;
27  import org.apache.turbine.services.jsp.JspService;
28  
29  // Jetspeed classes
30  import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
31  import org.apache.jetspeed.services.logging.JetspeedLogger;
32  
33  /***
34   * Supporting class for the TemplateLink tag.
35   * Uses the TemplateLink class to construct a URI
36   *
37   * @author <a href="mailto:ingo@raleigh.ibm.com">Ingo Schuster</a>
38   */
39  public class TemplateLinkTag extends TagSupport 
40  {
41      /***
42       * Static initialization of the logger for this class
43       */    
44      private static final JetspeedLogger logger = JetspeedLogFactoryService.getLogger(TemplateLinkTag.class.getName());
45      
46      /***
47       * template parameter defines the template to set
48       * mandatory parameter
49       */
50      private String template;
51  
52      /*** 
53       * The setter for template parameter
54       */
55      public void setTemplate(String template)
56      {
57          this.template = template;
58      }
59  
60      /***
61       * action parameter defines the action to set
62       * optional parameter
63       */
64      private String action;
65  
66      /*** 
67       * The setter for screen parameter
68       */
69      public void setAction(String action)
70      {
71          this.action = action;
72      }
73  
74      public int doStartTag() throws JspException 
75      {
76          RunData data = (RunData)pageContext.getAttribute(JspService.RUNDATA, PageContext.REQUEST_SCOPE);    
77          
78          TemplateLink link = new TemplateLink( data );
79          DynamicURI uri = link.setPage( template );
80          if ( action != null ) uri = uri.setAction( action );
81  
82          try
83          {
84              if (uri != null) {
85                  pageContext.getOut().print(uri.toString());
86              }
87          }
88          catch (Exception e)
89          {
90              String message = "Error processing TemplateLink-tag, parameter: template='"+ template + "', action='" +action +"'";
91              logger.error(message, e);
92              try
93              {
94                  data.getOut().print( message );
95              }
96              catch(java.io.IOException ioe) {}    
97          }
98         
99          return EVAL_BODY_INCLUDE;
100     }
101 
102 }