1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. 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,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.myfaces.el;
20
21 import javax.faces.context.FacesContext;
22 import javax.faces.el.EvaluationException;
23 import javax.faces.el.VariableResolver;
24
25 /**
26 * This is the default VariableResolver. See JSF 1.2 spec section 5.8.1
27 *
28 * @author Stan Silvert
29 */
30 public class NullVariableResolver extends VariableResolver
31 {
32
33 /** Creates a new instance of NullVariableResolver */
34 public NullVariableResolver()
35 {
36 }
37
38 @Override
39 public Object resolveVariable(FacesContext facesContext, String name) throws EvaluationException
40 {
41 facesContext.getELContext().setPropertyResolved(false);
42
43 return null;
44 }
45
46 }