1 /*
2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.javafx.property.adapter;
27
28 import javafx.beans.property.Property;
29 import javafx.beans.property.adapter.ReadOnlyJavaBeanProperty;
30 import javafx.beans.value.ChangeListener;
31 import javafx.beans.value.ObservableValue;
32
33 import java.beans.PropertyChangeEvent;
34 import java.beans.PropertyVetoException;
35 import java.beans.VetoableChangeListener;
36 import java.lang.reflect.InvocationTargetException;
37 import java.lang.reflect.Method;
38
39 import sun.reflect.misc.MethodUtil;
40
41 /**
42 */
43 public class PropertyDescriptor extends ReadOnlyPropertyDescriptor {
44
45 private static final String ADD_VETOABLE_LISTENER_METHOD_NAME = "addVetoableChangeListener";
46 private static final String REMOVE_VETOABLE_LISTENER_METHOD_NAME = "removeVetoableChangeListener";
47 private static final String ADD_PREFIX = "add";
48 private static final String REMOVE_PREFIX = "remove";
49 private static final String SUFFIX = "Listener";
50
51 private static final int ADD_VETOABLE_LISTENER_TAKES_NAME = 1;
52 private static final int REMOVE_VETOABLE_LISTENER_TAKES_NAME = 2;
53
54 private final Method setter;
55 private final Method addVetoListener;
56 private final Method removeVetoListener;
57 private final int flags;
58
59 public Method getSetter() {return setter;}
60
61 public PropertyDescriptor(String propertyName, Class<?> beanClass, Method getter, Method setter) {
62 super(propertyName, beanClass, getter);
63 this.setter = setter;
64
65 Method tmpAddVetoListener = null;
66 Method tmpRemoveVetoListener = null;
67 int tmpFlags = 0;
68
69 // reflect addVetoListenerMethod
70 final String addMethodName = ADD_PREFIX + capitalizedName(name) + SUFFIX;
71 try {
72 tmpAddVetoListener = beanClass.getMethod(addMethodName, VetoableChangeListener.class);
73 } catch (NoSuchMethodException e) {
74 try {
75 tmpAddVetoListener = beanClass.getMethod(ADD_VETOABLE_LISTENER_METHOD_NAME, String.class, VetoableChangeListener.class);
76 tmpFlags |= ADD_VETOABLE_LISTENER_TAKES_NAME;
77 } catch (NoSuchMethodException e1) {
78 try {
79 tmpAddVetoListener = beanClass.getMethod(ADD_VETOABLE_LISTENER_METHOD_NAME, VetoableChangeListener.class);
80 } catch (NoSuchMethodException e2) {
81 // ignore
82 }
83 }
84 }
85
86 // reflect removeVetoListenerMethod
87 final String removeMethodName = REMOVE_PREFIX + capitalizedName(name) + SUFFIX;
88 try {
89 tmpRemoveVetoListener = beanClass.getMethod(removeMethodName, VetoableChangeListener.class);
90 } catch (NoSuchMethodException e) {
91 try {
92 tmpRemoveVetoListener = beanClass.getMethod(REMOVE_VETOABLE_LISTENER_METHOD_NAME, String.class, VetoableChangeListener.class);
93 tmpFlags |= REMOVE_VETOABLE_LISTENER_TAKES_NAME;
94 } catch (NoSuchMethodException e1) {
95 try {
96 tmpRemoveVetoListener = beanClass.getMethod(REMOVE_VETOABLE_LISTENER_METHOD_NAME, VetoableChangeListener.class);
97 } catch (NoSuchMethodException e2) {
98 // ignore
99 }
100 }
101 }
102
103 addVetoListener = tmpAddVetoListener;
104 removeVetoListener = tmpRemoveVetoListener;
105 flags = tmpFlags;
106 }
107
108 @Override
109 public void addListener(ReadOnlyListener listener) {
110 super.addListener(listener);
111 if (addVetoListener != null) {
112 try {
113 if ((flags & ADD_VETOABLE_LISTENER_TAKES_NAME) > 0) {
114 addVetoListener.invoke(listener.getBean(), name, listener);
115 } else {
116 addVetoListener.invoke(listener.getBean(), listener);
117 }
118 } catch (IllegalAccessException e) {
119 // ignore
120 } catch (InvocationTargetException e) {
121 // ignore
122 }
123 }
124 }
125
126
127
128 @Override
129 public void removeListener(ReadOnlyListener listener) {
130 super.removeListener(listener);
131 if (removeVetoListener != null) {
132 try {
133 if ((flags & REMOVE_VETOABLE_LISTENER_TAKES_NAME) > 0) {
134 removeVetoListener.invoke(listener.getBean(), name, listener);
135 } else {
136 removeVetoListener.invoke(listener.getBean(), listener);
137 }
138 } catch (IllegalAccessException e) {
139 // ignore
140 } catch (InvocationTargetException e) {
141 // ignore
142 }
143 }
144 }
145
146 public class Listener<T> extends ReadOnlyListener<T> implements ChangeListener<T>, VetoableChangeListener {
147
148 private boolean updating;
149
150 public Listener(Object bean, ReadOnlyJavaBeanProperty<T> property) {
151 super(bean, property);
152 }
153
154 @Override
155 public void changed(ObservableValue<? extends T> observable, T oldValue, T newValue) {
156 final ReadOnlyJavaBeanProperty<T> property = checkRef();
157 if (property == null) {
158 observable.removeListener(this);
159 } else if (!updating) {
160 updating = true;
161 try {
162 MethodUtil.invoke(setter, bean, new Object[] {newValue});
163 property.fireValueChangedEvent();
164 } catch (IllegalAccessException e) {
165 // ignore
166 } catch (InvocationTargetException e) {
167 // ignore
168 } finally {
169 updating = false;
170 }
171 }
172 }
173
174 @Override
175 public void vetoableChange(PropertyChangeEvent propertyChangeEvent) throws PropertyVetoException {
176 if (bean.equals(propertyChangeEvent.getSource()) && name.equals(propertyChangeEvent.getPropertyName())) {
177 final ReadOnlyJavaBeanProperty<T> property = checkRef();
178 if ((property instanceof Property) && (((Property)property).isBound()) && !updating) {
179 throw new PropertyVetoException("A bound value cannot be set.", propertyChangeEvent);
180 }
181 }
182 }
183 }
184
185 }