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1   /*
2    * $Id: OgnlTool.java 439747 2006-09-03 09:22:46Z mrdon $
3    *
4    * Copyright 2006 The Apache Software Foundation.
5    *
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    *
10   *      http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.struts2.views.jsp.ui;
19  
20  import ognl.Ognl;
21  import ognl.OgnlException;
22  
23  import com.opensymphony.xwork2.util.OgnlUtil;
24  
25  
26  /***
27   */
28  public class OgnlTool {
29      private static OgnlTool instance = new OgnlTool();
30  
31      private OgnlTool() {
32      }
33  
34      public static OgnlTool getInstance() {
35          return instance;
36      }
37  
38      public Object findValue(String expr, Object context) {
39          try {
40              return Ognl.getValue(OgnlUtil.compile(expr), context);
41          } catch (OgnlException e) {
42              return null;
43          }
44      }
45  }