001/**
002 * Copyright 2005-2016 The Kuali Foundation
003 *
004 * Licensed under the Educational Community License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.opensource.org/licenses/ecl2.php
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.kuali.rice.kns.web.servlet.dwr;
017
018import org.directwebremoting.spring.SpringCreator;
019import org.kuali.rice.core.api.config.property.ConfigContext;
020import org.kuali.rice.core.api.resourceloader.GlobalResourceLoader;
021import org.kuali.rice.kew.api.doctype.DocumentTypeService;
022import org.springframework.beans.factory.BeanFactory;
023
024import java.lang.reflect.InvocationHandler;
025import java.lang.reflect.Method;
026import java.lang.reflect.Proxy;
027
028/**
029 * A {@link SpringCreator} that checks the {@link GlobalResourceLoader} for the
030 * bean name in question if the default {@link BeanFactory} (the applications)
031 * does not have the bean in question.
032 * 
033 * @author Kuali Rice Team (rice.collab@kuali.org)
034 * 
035 */
036public class GlobalResourceDelegatingSpringCreator extends SpringCreator {
037
038    public static final String KEW_RUN_MODE_PROPERTY = "kew.mode";
039    public static final String DOCUMENT_TYPE_SERVICE = "enDocumentTypeService";
040
041        @Override
042        public Object getInstance() throws InstantiationException {
043
044        //KULRICE-7770 enDocumentTypeService isn't supported in remote mode
045        if(ConfigContext.getCurrentContextConfig().getProperty(KEW_RUN_MODE_PROPERTY).equals("REMOTE") &&
046                this.getBeanName().equals(DOCUMENT_TYPE_SERVICE))
047        {   
048            return Proxy.newProxyInstance(getClass().getClassLoader(), new Class<?>[]{DocumentTypeService.class},
049                // trivial invocationHandler
050                new InvocationHandler() {
051                    @Override
052                    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
053                        return null;
054                    }
055                }
056            );
057        }
058
059        Object bean = GlobalResourceLoader.getService(this.getBeanName());
060    
061        if (bean == null) {
062            throw new InstantiationException("Unable to find bean " + this.getBeanName() + " in Rice Global Resource Loader");
063        }
064
065        return bean;
066        }
067
068}