View Javadoc

1   /*
2    * $Id: InitDefinitionsTag.java 471754 2006-11-06 14:55:09Z husted $
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  
22  
23  package org.apache.struts.tiles.taglib;
24  
25  import javax.servlet.jsp.JspException;
26  import javax.servlet.jsp.tagext.TagSupport;
27  
28  import org.apache.struts.tiles.DefinitionsFactory;
29  import org.apache.struts.tiles.DefinitionsFactoryConfig;
30  import org.apache.struts.tiles.DefinitionsFactoryException;
31  import org.apache.struts.tiles.TilesUtil;
32  
33    /**
34     * Init definitions factory.
35     */
36  public class InitDefinitionsTag extends TagSupport
37      implements ComponentConstants {
38  
39  
40    private String filename = null;
41    private String classname = null;
42  
43    /**
44     * Default constructor.
45     */
46    public InitDefinitionsTag() {
47      super();
48    }
49  
50      /**
51       * Release all allocated resources.
52       */
53      public void release() {
54  
55          super.release();
56          filename = null;
57      }
58  
59      /**
60       * Set file.
61       */
62    public void setFile(String name){
63      this.filename = name;
64    }
65  
66      /**
67       * Set classname.
68       */
69    public void setClassname(String classname){
70      this.classname = classname;
71    }
72  
73      /**
74       * Do start tag.
75       */
76    public int doStartTag() throws JspException
77    {
78    DefinitionsFactory factory =
79        TilesUtil.getDefinitionsFactory(pageContext.getRequest(),
80            pageContext.getServletContext());
81    if(factory != null )
82      return SKIP_BODY;
83  
84    DefinitionsFactoryConfig factoryConfig = new DefinitionsFactoryConfig();
85    factoryConfig.setFactoryClassname( classname );
86    factoryConfig.setDefinitionConfigFiles( filename );
87  
88    try
89      {
90      factory = TilesUtil.createDefinitionsFactory(
91          pageContext.getServletContext(), factoryConfig);
92      }
93     catch( DefinitionsFactoryException ex )
94        {
95        ex.printStackTrace();
96        throw new JspException( ex );
97        }
98    return SKIP_BODY;
99    }
100 
101     /**
102      * Do end tag.
103      */
104   public int doEndTag() throws JspException {
105     return EVAL_PAGE;
106   }
107 
108 }