001    /*
002      GRANITE DATA SERVICES
003      Copyright (C) 2012 GRANITE DATA SERVICES S.A.S.
004    
005      This file is part of Granite Data Services.
006    
007      Granite Data Services is free software; you can redistribute it and/or modify
008      it under the terms of the GNU Library General Public License as published by
009      the Free Software Foundation; either version 2 of the License, or (at your
010      option) any later version.
011    
012      Granite Data Services is distributed in the hope that it will be useful, but
013      WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014      FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015      for more details.
016    
017      You should have received a copy of the GNU Library General Public License
018      along with this library; if not, see <http://www.gnu.org/licenses/>.
019    */
020    
021    package org.granite.client.tide.spring;
022    
023    import org.granite.client.tide.ViewScope.BeanResetter;
024    import org.granite.client.tide.ViewScopeHolder;
025    import org.springframework.beans.factory.ObjectFactory;
026    import org.springframework.beans.factory.config.Scope;
027    
028    /**
029     * @author William DRAI
030     */
031    public class ViewScope implements Scope {
032            
033            // private static final Logger log = Logger.getLogger(ViewScope.class);
034            
035            private org.granite.client.tide.ViewScope beanCache;
036            
037            public ViewScope() {
038            }
039            
040            private org.granite.client.tide.ViewScope getBeanCache() {
041                    if (beanCache == null) {
042                            beanCache = ViewScopeHolder.get();
043                            if (beanCache == null)
044                                    throw new RuntimeException("View bean cache not set");
045                    }
046                    return beanCache;
047            }
048            
049            @Override
050            public String getConversationId() {
051                    return getBeanCache().getViewId();
052            }
053            
054            @Override
055            public Object get(String name, ObjectFactory<?> objectFactory) {
056                    Object instance = getBeanCache().get(name);
057                    if (instance == null) {
058                            instance = objectFactory.getObject();
059                            getBeanCache().put(name, instance);
060                    }
061                    return instance;
062            }
063            
064            @Override
065            public Object resolveContextualObject(String name) {
066                    return getBeanCache().get(name);
067            }
068            
069            @Override
070            public void registerDestructionCallback(String name, final Runnable callback) {
071                    getBeanCache().addResetter(name, new BeanResetter() {
072                            @Override
073                            public void reset(Object instance) {
074                                    callback.run();
075                            }
076                    });
077            }
078            
079            @Override
080            public Object remove(String name) {
081                    return getBeanCache().remove(name);
082            }
083            
084    }
085