Java tutorial
/* * Copyright 2007 The Fornax Project Team, including the original * author or authors. * * Licensed 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.sculptor.framework.domain; import java.io.Serializable; import java.util.Date; import org.hibernate.EmptyInterceptor; import org.hibernate.type.Type; import org.sculptor.framework.errorhandling.ServiceContextStore; /** * This Hibernate interceptor will be invoked when objects are saved and it will * automatically update properties 'lastUpdated', 'lastUpdatedBy', 'createdDate' * and 'createdBy' for objects implementing * {@link org.sculptor.framework.domain.Auditable}. * <p> * It will grab the user from * {@link org.sculptor.framework.errorhandling.ServiceContext} provided by * {@link org.sculptor.framework.errorhandling.ServiceContextStore}. * */ public class AuditInterceptor extends EmptyInterceptor { private static final long serialVersionUID = -4898120478874862611L; @Override public void onDelete(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) { // do nothing } @Override public boolean onFlushDirty(Object entity, Serializable id, Object[] currentState, Object[] previousState, String[] propertyNames, Type[] types) { return changeLastUpdatedInformation(entity, currentState, propertyNames); } @Override public boolean onSave(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) { return changeLastUpdatedInformation(entity, state, propertyNames); } private boolean changeLastUpdatedInformation(Object entity, Object[] currentState, String[] propertyNames) { boolean result = false; if (entity instanceof Auditable) { String lastUpdatedBy = ServiceContextStore.getCurrentUser(); Date lastUpdatedDate = new Date(); for (int i = 0; i < propertyNames.length; i++) { if ("lastUpdated".equals(propertyNames[i])) { currentState[i] = lastUpdatedDate; result = true; } else if ("lastUpdatedBy".equals(propertyNames[i])) { currentState[i] = lastUpdatedBy; result = true; } else if ("createdDate".equals(propertyNames[i]) && (currentState[i] == null)) { currentState[i] = lastUpdatedDate; result = true; } else if ("createdBy".equals(propertyNames[i]) && (currentState[i] == null)) { currentState[i] = lastUpdatedBy; result = true; } } } return result; } @Override public boolean onLoad(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) { // Do nothing return false; } }