1   /**
2    * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.taglib.portlet;
24  
25  import com.liferay.portal.kernel.util.MethodInvoker;
26  import com.liferay.portal.kernel.util.MethodWrapper;
27  import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
28  import com.liferay.portal.kernel.util.StringPool;
29  
30  import javax.servlet.jsp.JspException;
31  import javax.servlet.jsp.PageContext;
32  import javax.servlet.jsp.tagext.TagSupport;
33  
34  import org.apache.commons.logging.Log;
35  import org.apache.commons.logging.LogFactory;
36  
37  /**
38   * <a href="RenderURLParamsTag.java.html"><b><i>View Source</i></b></a>
39   *
40   * @author Brian Wing Shun Chan
41   *
42   */
43  public class RenderURLParamsTag extends TagSupport {
44  
45      public static String doTag(String varImpl, PageContext pageContext)
46          throws Exception {
47  
48          Object returnObj = null;
49  
50          Thread currentThread = Thread.currentThread();
51  
52          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
53  
54          try {
55              currentThread.setContextClassLoader(
56                  PortalClassLoaderUtil.getClassLoader());
57  
58              MethodWrapper methodWrapper = new MethodWrapper(
59                  _TAG_CLASS, _TAG_DO_END_METHOD,
60                  new Object[] {varImpl, pageContext});
61  
62              returnObj = MethodInvoker.invoke(methodWrapper);
63          }
64          catch (Exception e) {
65              _log.error(e, e);
66  
67              throw e;
68          }
69          finally {
70              currentThread.setContextClassLoader(contextClassLoader);
71          }
72  
73          if (returnObj != null) {
74              return returnObj.toString();
75          }
76          else {
77              return StringPool.BLANK;
78          }
79      }
80  
81      public int doEndTag() throws JspException {
82          try {
83              doTag(_varImpl, pageContext);
84          }
85          catch (Exception e) {
86              if (e instanceof JspException) {
87                  throw (JspException)e;
88              }
89              else {
90                  throw new JspException(e);
91              }
92          }
93  
94          return EVAL_PAGE;
95      }
96  
97      public void setVarImpl(String varImpl) {
98          _varImpl = varImpl;
99      }
100 
101     private static final String _TAG_CLASS =
102         "com.liferay.portal.servlet.taglib.portlet.RenderURLParamsTagUtil";
103 
104     private static final String _TAG_DO_END_METHOD = "doEndTag";
105 
106     private static Log _log = LogFactory.getLog(RenderURLParamsTag.class);
107 
108     private String _varImpl;
109 
110 }