| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.openejb.core.cmp.cmp2; |
| |
| import javax.ejb.EJBLocalObject; |
| import javax.ejb.EntityBean; |
| import javax.ejb.EJBException; |
| import javax.transaction.TransactionSynchronizationRegistry; |
| import java.util.Set; |
| import java.util.Iterator; |
| import java.util.Collection; |
| import java.util.ArrayList; |
| |
| import org.apache.openejb.BeanContext; |
| import org.apache.openejb.loader.SystemInstance; |
| |
| // |
| // WARNING: Do not refactor this class. It is used by the Cmp2Generator. |
| // |
| public class SetValuedCmr<Bean extends EntityBean, Proxy extends EJBLocalObject> { |
| private final EntityBean source; |
| private final String sourceProperty; |
| private final String relatedProperty; |
| private final BeanContext relatedInfo; |
| private final TransactionSynchronizationRegistry transactionRegistry; |
| |
| public SetValuedCmr(EntityBean source, String sourceProperty, Class<Bean> relatedType, String relatedProperty) { |
| if (source == null) throw new NullPointerException("source is null"); |
| if (relatedType == null) throw new NullPointerException("relatedType is null"); |
| |
| this.source = source; |
| this.sourceProperty = sourceProperty; |
| this.relatedProperty = relatedProperty; |
| |
| this.relatedInfo = Cmp2Util.getBeanContext(relatedType); |
| |
| transactionRegistry = SystemInstance.get().getComponent(TransactionSynchronizationRegistry.class); |
| } |
| |
| public Set<Proxy> get(Set<Bean> others) { |
| if (sourceProperty == null) { |
| throw new EJBException("Internal error: this container managed relationship is unidirectional and, " + |
| "this entity does not have a cmr field for the relationship"); |
| } |
| |
| if (others == null) { |
| throw new NullPointerException("others is null"); |
| } |
| |
| // This may not work if the JPA implementation creates multiple instances in the same tx |
| // in that case we need to key of of the deploymentId, primary key and sourceProperty name |
| CmrSet<Bean, Proxy> cmrSet = null; |
| try { |
| cmrSet = (CmrSet<Bean, Proxy>) transactionRegistry.getResource(this); |
| } catch (IllegalStateException ignored) { |
| // no tx, which is fine |
| } |
| |
| if (cmrSet == null) { |
| cmrSet = new CmrSet<Bean, Proxy>(source, sourceProperty, relatedInfo, relatedProperty, others); |
| try { |
| transactionRegistry.putResource(this, cmrSet); |
| } catch (IllegalStateException ignored) { |
| // we tried but there is no tx |
| } |
| } |
| return cmrSet; |
| } |
| |
| public void set(Set<Bean> relatedBeans, Collection newProxies) { |
| if (sourceProperty == null) { |
| throw new EJBException("Internal error: this container managed relationship is unidirectional and, " + |
| "this entity does not have a cmr field for the relationship"); |
| } |
| |
| // null can not be set into a cmr field |
| // EJB 3.0 Section 8.3.8 "Collections Managed by the Container" bullet 4 |
| if (newProxies == null) { |
| throw new IllegalArgumentException("null can not be set into a collection-valued cmr-field"); |
| } |
| |
| // clear back reference in the old related beans |
| if (relatedProperty != null) { |
| for (Bean oldBean : relatedBeans) { |
| if (oldBean != null) { |
| toCmp2Entity(oldBean).OpenEJB_removeCmr(relatedProperty, source); |
| } |
| } |
| } |
| relatedBeans.clear(); |
| |
| for (Iterator iterator = new ArrayList(newProxies).iterator(); iterator.hasNext();) { |
| Proxy newProxy = (Proxy) iterator.next(); |
| Bean newBean = Cmp2Util.<Bean>getEntityBean(newProxy); |
| |
| if (newProxy != null) { |
| // set the back reference in the new related bean |
| Object oldBackRef = null; |
| if (relatedProperty != null) { |
| oldBackRef = toCmp2Entity(newBean).OpenEJB_addCmr(relatedProperty, source); |
| } |
| |
| // add the bean to our value map |
| relatedBeans.add(newBean); |
| |
| // if the new related beas was related to another bean, we need |
| // to clear the back reference in that old bean |
| if (relatedProperty != null && oldBackRef != null) { |
| toCmp2Entity(oldBackRef).OpenEJB_removeCmr(sourceProperty, newBean); |
| } |
| } |
| } |
| } |
| |
| public void deleted(Set<Bean> relatedBeans) { |
| CmrSet<Bean, Proxy> cmrSet = (CmrSet<Bean, Proxy>) transactionRegistry.getResource(this); |
| if (cmrSet != null) { |
| transactionRegistry.putResource(this, null); |
| cmrSet.entityDeleted(); |
| } |
| |
| // clear back reference in the old related beans |
| if (relatedProperty != null) { |
| for (Bean oldBean : relatedBeans) { |
| if (oldBean != null) { |
| toCmp2Entity(oldBean).OpenEJB_removeCmr(relatedProperty, source); |
| } |
| } |
| } |
| } |
| |
| private Cmp2Entity toCmp2Entity(Object object) { |
| return (Cmp2Entity) object; |
| } |
| } |