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 javax.faces.component;
20
21 import java.beans.PropertyDescriptor;
22 import java.lang.ref.Reference;
23 import java.lang.ref.SoftReference;
24 import java.lang.reflect.Method;
25
26 class _PropertyDescriptorHolder
27 {
28 private final PropertyDescriptor _descriptor;
29 private Reference<Method> _readMethodRef;
30 private Reference<Method> _writeMethodRef;
31
32 public _PropertyDescriptorHolder(PropertyDescriptor descriptor)
33 {
34 _descriptor = descriptor;
35 _readMethodRef = new SoftReference<Method>(_descriptor.getReadMethod());
36 }
37
38 public _PropertyDescriptorHolder(PropertyDescriptor descriptor, Method readMethod)
39 {
40 _descriptor = descriptor;
41 _readMethodRef = new SoftReference<Method>(readMethod);
42 }
43
44 public String getName()
45 {
46 return _descriptor.getName();
47 }
48
49 public Method getReadMethod()
50 {
51 Method readMethod = _readMethodRef.get();
52 if (readMethod == null)
53 {
54 readMethod = _descriptor.getReadMethod();
55 _readMethodRef = new SoftReference<Method>(readMethod);
56 }
57 return readMethod;
58 }
59
60 public Method getWriteMethod()
61 {
62 if (_writeMethodRef == null || _writeMethodRef.get() == null)
63 {
64 // In facelets, the Method instance used to write the variable is stored
65 // in a variable (see org.apache.myfaces.view.facelets.tag.BeanPropertyTagRule),
66 // so the impact of this synchronized call at the end is minimal compared with
67 // getReadMethod. That's the reason why cache it here in a lazy way is enough
68 // instead retrieve it as soon as this holder is created.
69 Method writeMethod = _descriptor.getWriteMethod();
70 _writeMethodRef = new SoftReference<Method>(writeMethod);
71 }
72 return _writeMethodRef.get();
73 }
74
75 public PropertyDescriptor getPropertyDescriptor()
76 {
77 return _descriptor;
78 }
79 }