TemplateLinkTag


1   package org.apache.turbine.services.jsp.tags;
2   
3   /*
4    * Copyright 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 java.io.IOException  ;
20  import javax.servlet.jsp.JspException  ;
21  import javax.servlet.jsp.PageContext  ;
22  import javax.servlet.jsp.tagext.TagSupport  ;
23  import org.apache.turbine.services.jsp.JspService;
24  import org.apache.turbine.util.DynamicURI;
25  import org.apache.turbine.util.Log;
26  import org.apache.turbine.util.RunData;
27  import org.apache.turbine.util.template.TemplateLink;
28  
29  /**
30   * Supporting class for the TemplateLink tag.
31   * Uses the TemplateLink class to construct a URI
32   *
33   * @author <a HREF="mailto:ingo@raleigh.ibm.com">Ingo Schuster</a>
34   * @version $Id: TemplateLinkTag.java,v 1.1.2.2 2004/05/20 03:03:07 seade Exp $
35   */
36  public class TemplateLinkTag extends TagSupport  
37  {
38       /**
39        * template parameter defines the template to set
40        * mandatory parameter
41        */
42       private String   template;
43  
44       /**
45        * The setter for template parameter
46        */
47       public void setTemplate(String   template)
48       {
49           this.template = template;
50       }
51  
52       /**
53        * action parameter defines the action to set
54        * optional parameter
55        */
56       private String   action;
57  
58       /**
59        * The setter for screen parameter
60        */
61       public void setAction(String   action)
62       {
63           this.action = action;
64       }
65  
66       public int doStartTag() throws JspException  
67       {
68           RunData data = 
69               (RunData)pageContext.getAttribute(JspService.RUNDATA, 
70                                                 PageContext.REQUEST_SCOPE);
71  
72           TemplateLink link = new TemplateLink( data );
73           DynamicURI uri = link.setPage( template );
74           if ( action != null ) uri = uri.setAction( action );
75  
76           try
77           {
78               if (uri != null) {
79                   pageContext.getOut().print(uri.toString());
80               }
81           }
82           catch (Exception   e)
83           {
84               String   message = 
85                   "Error processing TemplateLink-tag, parameter: template='"
86                   + template + "', action='" +action +"'";
87               Log.error(message, e);
88               try
89               {
90                   data.getOut().print( message );
91               }
92               catch(java.io.IOException   ioe) {}
93           }
94  
95           return EVAL_BODY_INCLUDE;
96       }
97  
98  }
99  
100
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