| JSFTagUtil.java |
1 /**
2 * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or modify it under
5 * the terms of the GNU Lesser General Public License as published by the Free
6 * Software Foundation; either version 2.1 of the License, or (at your option)
7 * any later version.
8 *
9 * This library is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12 * details.
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 }