001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *                               ***
008 *
009 *   Community License: GPL 3.0
010 *
011 *   This file is free software: you can redistribute it and/or modify
012 *   it under the terms of the GNU General Public License as published
013 *   by the Free Software Foundation, either version 3 of the License,
014 *   or (at your option) any later version.
015 *
016 *   This file is distributed in the hope that it will be useful, but
017 *   WITHOUT ANY WARRANTY; without even the implied warranty of
018 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
019 *   GNU General Public License for more details.
020 *
021 *   You should have received a copy of the GNU General Public License
022 *   along with this program. If not, see <http://www.gnu.org/licenses/>.
023 *
024 *                               ***
025 *
026 *   Available Commercial License: GraniteDS SLA 1.0
027 *
028 *   This is the appropriate option if you are creating proprietary
029 *   applications and you are not prepared to distribute and share the
030 *   source code of your application under the GPL v3 license.
031 *
032 *   Please visit http://www.granitedataservices.com/license for more
033 *   details.
034 */
035package org.granite.client.tide.impl;
036
037import java.beans.PropertyChangeListener;
038import java.beans.PropertyChangeSupport;
039import java.lang.reflect.Method;
040import java.util.concurrent.ConcurrentHashMap;
041
042import org.granite.client.util.WeakIdentityHashMap;
043import org.granite.logging.Logger;
044
045/**
046 * @author William DRAI
047 */
048public class BindingUtil {
049        
050    private static final Logger log = Logger.getLogger(BindingUtil.class);
051    
052        private static final ConcurrentHashMap<Class<?>, Method[]> changeListenerMethodsMap = new ConcurrentHashMap<Class<?>, Method[]>();
053        private static final WeakIdentityHashMap<Object, PropertyChangeSupport> pcsMap = new WeakIdentityHashMap<Object, PropertyChangeSupport>();
054        
055    private static Method[] getPropertyChangeListeners(Class<?> clazz) throws NoSuchMethodException {
056        Method[] m = changeListenerMethodsMap.get(clazz);
057        if (m == null) {
058                try {
059                        Method add1 = clazz.getMethod("addPropertyChangeListener", PropertyChangeListener.class);
060                        Method rem1 = clazz.getMethod("removePropertyChangeListener", PropertyChangeListener.class);
061                        try {
062                                Method add2 = clazz.getMethod("addPropertyChangeListener", String.class, PropertyChangeListener.class);
063                                Method rem2 = clazz.getMethod("removePropertyChangeListener", String.class, PropertyChangeListener.class);
064                                m = new Method[] { add1, rem1, add2, rem2 };
065                        }
066                        catch (NoSuchMethodException e) {
067                                m = new Method[] { add1, rem1 };
068                        }
069                }
070                catch (NoSuchMethodException e) {
071                        m = new Method[0];
072                }
073                changeListenerMethodsMap.put(clazz, m);
074        }
075        return m;
076    }
077    
078    private static PropertyChangeSupport getProperyChangeSupport(Object bean) {
079        PropertyChangeSupport pcs = pcsMap.get(bean);
080        if (pcs == null) {
081                pcs = new PropertyChangeSupport(bean);
082                pcsMap.put(bean, pcs);
083        }
084        return pcs;
085    }
086        
087    public static void addPropertyChangeListener(Object bean, PropertyChangeListener listener) {
088        try {
089                Method[] m = getPropertyChangeListeners(bean.getClass());
090                if (m.length > 0)
091                        m[0].invoke(bean, listener);
092                else
093                        getProperyChangeSupport(bean).addPropertyChangeListener(listener);
094        }
095        catch (Exception e) {
096                log.debug("Could not add property change listener on %s", bean);
097        }
098    }
099        
100    public static void addPropertyChangeListener(Object bean, String propertyName, PropertyChangeListener listener) {
101        try {
102                Method[] m = getPropertyChangeListeners(bean.getClass());
103                if (m.length > 2)
104                        m[2].invoke(bean, listener);
105                else
106                        getProperyChangeSupport(bean).addPropertyChangeListener(propertyName, listener);
107        }
108        catch (Exception e) {
109                log.debug("Could not add property change listener %s on %s", propertyName, bean);
110        }
111    }
112        
113    public static void removePropertyChangeListener(Object bean, PropertyChangeListener listener) {
114        try {
115                Method[] m = getPropertyChangeListeners(bean.getClass());
116                if (m.length > 0)
117                        m[1].invoke(bean, listener);
118                else
119                        getProperyChangeSupport(bean).removePropertyChangeListener(listener);
120        }
121        catch (Exception e) {
122                log.debug("Could not remove property change listener on %s", bean);
123        }
124    }
125        
126    public static void removePropertyChangeListener(Object bean, String propertyName, PropertyChangeListener listener) {
127        try {
128                Method[] m = getPropertyChangeListeners(bean.getClass());
129                if (m.length > 2)
130                        m[3].invoke(bean, listener);
131                else
132                        getProperyChangeSupport(bean).removePropertyChangeListener(propertyName, listener);
133        }
134        catch (Exception e) {
135                log.debug("Could not remove property change listener %s on %s", propertyName, bean);
136        }
137    }
138}