1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   *
12   *
13   */
14  
15  package com.liferay.taglib.faces.util;
16  
17  import com.liferay.portal.kernel.util.Validator;
18  
19  import javax.faces.application.Application;
20  import javax.faces.context.FacesContext;
21  import javax.faces.el.ValueBinding;
22  import javax.faces.webapp.UIComponentTag;
23  
24  /**
25   * <a href="JSFTagUtil.java.html"><b><i>View Source</i></b></a>
26   *
27   * @author Neil Griffin
28   */
29  public class JSFTagUtil {
30  
31      public static String eval(String expr) {
32          if (Validator.isNotNull(expr) &&
33              UIComponentTag.isValueReference(expr)) {
34  
35              FacesContext facesContext = FacesContext.getCurrentInstance();
36  
37              Application application = facesContext.getApplication();
38              ValueBinding valueBinding = application.createValueBinding(expr);
39  
40              expr = String.valueOf(valueBinding.getValue(facesContext));
41          }
42  
43          return expr;
44      }
45  
46  }