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.flow;
20
21 import javax.el.ValueExpression;
22 import javax.faces.flow.Parameter;
23
24 /**
25 *
26 * @since 2.2
27 * @author Leonardo Uribe
28 */
29 public class ParameterImpl extends Parameter implements Freezable
30 {
31 private String _name;
32 private ValueExpression _value;
33
34 private boolean _initialized;
35
36 public ParameterImpl(String name, ValueExpression value)
37 {
38 this._name = name;
39 this._value = value;
40 }
41
42 @Override
43 public String getName()
44 {
45 return _name;
46 }
47
48 @Override
49 public ValueExpression getValue()
50 {
51 return _value;
52 }
53
54 public void freeze()
55 {
56 _initialized = true;
57 }
58
59 private void checkInitialized() throws IllegalStateException
60 {
61 if (_initialized)
62 {
63 throw new IllegalStateException("Flow is inmutable once initialized");
64 }
65 }
66
67 public void setName(String name)
68 {
69 checkInitialized();
70 this._name = name;
71 }
72
73 public void setValue(ValueExpression value)
74 {
75 checkInitialized();
76 this._value = value;
77 }
78 }