1 /*
2 * Copyright (c) 2011, 2017, 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 com.sun.javafx.property.MethodHelper;
29 import javafx.beans.property.Property;
30 import javafx.beans.property.adapter.ReadOnlyJavaBeanProperty;
31 import javafx.beans.value.ChangeListener;
32 import javafx.beans.value.ObservableValue;
33
34 import java.beans.PropertyChangeEvent;
35 import java.beans.PropertyVetoException;
36 import java.beans.VetoableChangeListener;
37 import java.lang.reflect.InvocationTargetException;
38 import java.lang.reflect.Method;
39
40 /**
41 */
42 public class PropertyDescriptor extends ReadOnlyPropertyDescriptor {
43
44 private static final String ADD_VETOABLE_LISTENER_METHOD_NAME = "addVetoableChangeListener";
45 private static final String REMOVE_VETOABLE_LISTENER_METHOD_NAME = "removeVetoableChangeListener";
46 private static final String ADD_PREFIX = "add";
47 private static final String REMOVE_PREFIX = "remove";
48 private static final String SUFFIX = "Listener";
49
50 private static final int ADD_VETOABLE_LISTENER_TAKES_NAME = 1;
51 private static final int REMOVE_VETOABLE_LISTENER_TAKES_NAME = 2;
52
53 private final Method setter;
54 private final Method addVetoListener;
55 private final Method removeVetoListener;
56 private final int flags;
57
58 public Method getSetter() {return setter;}
59
60 public PropertyDescriptor(String propertyName, Class<?> beanClass, Method getter, Method setter) {
61 super(propertyName, beanClass, getter);
62 this.setter = setter;
63
64 Method tmpAddVetoListener = null;
65 Method tmpRemoveVetoListener = null;
66 int tmpFlags = 0;
67
68 // reflect addVetoListenerMethod
69 final String addMethodName = ADD_PREFIX + capitalizedName(name) + SUFFIX;
70 try {
71 tmpAddVetoListener = beanClass.getMethod(addMethodName, VetoableChangeListener.class);
72 } catch (NoSuchMethodException e) {
73 try {
74 tmpAddVetoListener = beanClass.getMethod(ADD_VETOABLE_LISTENER_METHOD_NAME, String.class, VetoableChangeListener.class);
75 tmpFlags |= ADD_VETOABLE_LISTENER_TAKES_NAME;
76 } catch (NoSuchMethodException e1) {
77 try {
78 tmpAddVetoListener = beanClass.getMethod(ADD_VETOABLE_LISTENER_METHOD_NAME, VetoableChangeListener.class);
79 } catch (NoSuchMethodException e2) {
80 // ignore
81 }
82 }
83 }
84
85 // reflect removeVetoListenerMethod
86 final String removeMethodName = REMOVE_PREFIX + capitalizedName(name) + SUFFIX;
87 try {
88 tmpRemoveVetoListener = beanClass.getMethod(removeMethodName, VetoableChangeListener.class);
89 } catch (NoSuchMethodException e) {
90 try {
91 tmpRemoveVetoListener = beanClass.getMethod(REMOVE_VETOABLE_LISTENER_METHOD_NAME, String.class, VetoableChangeListener.class);
92 tmpFlags |= REMOVE_VETOABLE_LISTENER_TAKES_NAME;
93 } catch (NoSuchMethodException e1) {
94 try {
95 tmpRemoveVetoListener = beanClass.getMethod(REMOVE_VETOABLE_LISTENER_METHOD_NAME, VetoableChangeListener.class);
96 } catch (NoSuchMethodException e2) {
97 // ignore
98 }
99 }
100 }
101
102 addVetoListener = tmpAddVetoListener;
103 removeVetoListener = tmpRemoveVetoListener;
104 flags = tmpFlags;
105 }
106
107 @Override
108 public void addListener(ReadOnlyListener listener) {
109 super.addListener(listener);
110 if (addVetoListener != null) {
111 try {
112 if ((flags & ADD_VETOABLE_LISTENER_TAKES_NAME) > 0) {
113 addVetoListener.invoke(listener.getBean(), name, listener);
114 } else {
115 addVetoListener.invoke(listener.getBean(), listener);
116 }
117 } catch (IllegalAccessException e) {
118 // ignore
119 } catch (InvocationTargetException e) {
120 // ignore
121 }
122 }
123 }
124
125
126
127 @Override
128 public void removeListener(ReadOnlyListener listener) {
129 super.removeListener(listener);
130 if (removeVetoListener != null) {
131 try {
132 if ((flags & REMOVE_VETOABLE_LISTENER_TAKES_NAME) > 0) {
133 removeVetoListener.invoke(listener.getBean(), name, listener);
134 } else {
135 removeVetoListener.invoke(listener.getBean(), listener);
136 }
137 } catch (IllegalAccessException e) {
138 // ignore
139 } catch (InvocationTargetException e) {
140 // ignore
141 }
142 }
143 }
144
145 public class Listener<T> extends ReadOnlyListener<T> implements ChangeListener<T>, VetoableChangeListener {
146
147 private boolean updating;
148
149 public Listener(Object bean, ReadOnlyJavaBeanProperty<T> property) {
150 super(bean, property);
151 }
152
153 @Override
154 public void changed(ObservableValue<? extends T> observable, T oldValue, T newValue) {
155 final ReadOnlyJavaBeanProperty<T> property = checkRef();
156 if (property == null) {
157 observable.removeListener(this);
158 } else if (!updating) {
159 updating = true;
160 try {
161 MethodHelper.invoke(setter, bean, new Object[] {newValue});
162 property.fireValueChangedEvent();
163 } catch (IllegalAccessException e) {
164 // ignore
165 } catch (InvocationTargetException e) {
166 // ignore
167 } finally {
168 updating = false;
169 }
170 }
171 }
172
173 @Override
174 public void vetoableChange(PropertyChangeEvent propertyChangeEvent) throws PropertyVetoException {
175 if (bean.equals(propertyChangeEvent.getSource()) && name.equals(propertyChangeEvent.getPropertyName())) {
176 final ReadOnlyJavaBeanProperty<T> property = checkRef();
177 if ((property instanceof Property) && (((Property)property).isBound()) && !updating) {
178 throw new PropertyVetoException("A bound value cannot be set.", propertyChangeEvent);
179 }
180 }
181 }
182 }
183
184 }