OgnlTool


1   /*
2    * Copyright (c) 2002-2003 by OpenSymphony
3    * All rights reserved.
4    */
5   package com.opensymphony.webwork.views.jsp.ui;
6   
7   import com.opensymphony.xwork.util.OgnlUtil;
8   import ognl.Ognl;
9   import ognl.OgnlException;
10  
11  
12  /**
13   * @author Matt Ho <a HREF="mailto:matt@enginegreen.com">&lt;matt@enginegreen.com&gt;</a>
14   * @version $Id: OgnlTool.java,v 1.5 2004/10/02 05:40:05 jcarreira Exp $
15   */
16  public class OgnlTool {
17      //~ Static fields/initializers /////////////////////////////////////////////
18  
19      private static OgnlTool instance = new OgnlTool();
20  
21      //~ Constructors ///////////////////////////////////////////////////////////
22  
23      private OgnlTool() {
24      }
25  
26      //~ Methods ////////////////////////////////////////////////////////////////
27  
28      public static OgnlTool getInstance() {
29          return instance;
30      }
31  
32      public Object   findValue(String   expr, Object   context) {
33          try {
34              return Ognl.getValue(OgnlUtil.compile(expr), context);
35          } catch (OgnlException e) {
36              return null;
37          }
38      }
39  }
40

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