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1   /*
2    * $Id: RewriteTag.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  package org.apache.struts.taglib.html;
22  
23  import org.apache.struts.taglib.TagUtils;
24  
25  import javax.servlet.jsp.JspException;
26  
27  import java.net.MalformedURLException;
28  
29  import java.util.HashMap;
30  import java.util.Map;
31  
32  /**
33   * Generate a URL-encoded URI as a string.
34   *
35   * @version $Rev: 471754 $ $Date: 2004-10-16 12:38:42 -0400 (Sat, 16 Oct 2004)
36   *          $
37   */
38  public class RewriteTag extends LinkTag {
39      // --------------------------------------------------------- Public Methods
40  
41      /**
42       * Render the URI.
43       *
44       * @throws JspException if a JSP exception has occurred
45       */
46      public int doEndTag() throws JspException {
47          // Generate the hyperlink URL
48          Map params =
49              TagUtils.getInstance().computeParameters(pageContext, paramId,
50                  paramName, paramProperty, paramScope, name, property, scope,
51                  transaction);
52  
53          // Add parameters collected from the tag's inner body
54          if (!this.parameters.isEmpty()) {
55              if (params == null) {
56                  params = new HashMap();
57              }
58              params.putAll(this.parameters);
59          }
60  
61          String url = null;
62  
63          try {
64              // Note that we're encoding the & character to & in XHTML mode only,
65              // otherwise the & is written as is to work in javascripts.
66              url = TagUtils.getInstance().computeURLWithCharEncoding(pageContext,
67                      forward, href, page, action, module, params, anchor, false,
68                      this.isXhtml(), useLocalEncoding);
69          } catch (MalformedURLException e) {
70              TagUtils.getInstance().saveException(pageContext, e);
71              throw new JspException(messages.getMessage("rewrite.url",
72                      e.toString()));
73          }
74  
75          TagUtils.getInstance().write(pageContext, url);
76          return (EVAL_PAGE);
77      }
78  }