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.security;
24  
25  import com.liferay.portal.kernel.util.BooleanWrapper;
26  import com.liferay.portal.kernel.util.LongWrapper;
27  import com.liferay.portal.kernel.util.MethodInvoker;
28  import com.liferay.portal.kernel.util.MethodWrapper;
29  import com.liferay.portal.kernel.util.NullWrapper;
30  import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
31  import com.liferay.portal.kernel.util.StringPool;
32  
33  import javax.servlet.jsp.JspException;
34  import javax.servlet.jsp.PageContext;
35  import javax.servlet.jsp.tagext.TagSupport;
36  
37  import org.apache.commons.logging.Log;
38  import org.apache.commons.logging.LogFactory;
39  
40  /**
41   * <a href="DoAsURLTag.java.html"><b><i>View Source</i></b></a>
42   *
43   * @author Brian Wing Shun Chan
44   *
45   */
46  public class DoAsURLTag extends TagSupport {
47  
48      public static String doTag(
49              long doAsUserId, String var, boolean writeOutput,
50              PageContext pageContext)
51          throws Exception {
52  
53          Object returnObj = null;
54  
55          Thread currentThread = Thread.currentThread();
56  
57          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
58  
59          try {
60              currentThread.setContextClassLoader(
61                  PortalClassLoaderUtil.getClassLoader());
62  
63              Object varWrapper = var;
64  
65              if (varWrapper == null) {
66                  varWrapper = new NullWrapper(String.class.getName());
67              }
68  
69              MethodWrapper methodWrapper = new MethodWrapper(
70                  _TAG_CLASS, _TAG_DO_END_METHOD,
71                  new Object[] {
72                      new LongWrapper(doAsUserId), varWrapper,
73                      new BooleanWrapper(writeOutput), pageContext
74                  });
75  
76              returnObj = MethodInvoker.invoke(methodWrapper);
77          }
78          catch (Exception e) {
79              _log.error(e, e);
80          }
81          finally {
82              currentThread.setContextClassLoader(contextClassLoader);
83          }
84  
85          if (returnObj != null) {
86              return returnObj.toString();
87          }
88          else {
89              return StringPool.BLANK;
90          }
91      }
92  
93      public int doEndTag() throws JspException {
94          try {
95              doTag(_doAsUserId, _var, true, pageContext);
96          }
97          catch (Exception e) {
98              if (e instanceof JspException) {
99                  throw (JspException)e;
100             }
101             else {
102                 throw new JspException(e);
103             }
104         }
105 
106         return EVAL_PAGE;
107     }
108 
109     public void setDoAsUserId(long doAsUserId) {
110         _doAsUserId = doAsUserId;
111     }
112 
113     public void setVar(String var) {
114         _var = var;
115     }
116 
117     private static final String _TAG_CLASS =
118         "com.liferay.portal.servlet.taglib.security.DoAsURLTagUtil";
119 
120     private static final String _TAG_DO_END_METHOD = "doEndTag";
121 
122     private static Log _log = LogFactory.getLog(DoAsURLTag.class);
123 
124     private long _doAsUserId;
125     private String _var;
126 
127 }