Java tutorial
/* * Copyright 2004-2005 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.codehaus.groovy.grails.orm.hibernate.metaclass; import java.sql.SQLException; import java.util.regex.Pattern; import org.codehaus.groovy.grails.commons.GrailsApplication; import org.codehaus.groovy.grails.commons.GrailsDomainClass; import org.codehaus.groovy.grails.orm.hibernate.HibernateDatastore; import org.hibernate.HibernateException; import org.hibernate.LockMode; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.springframework.orm.hibernate3.HibernateCallback; /** * The merge() method follows the semantics of merge which attempts to "merge" an object * with a long lived session. * * @author Graeme Rocher * @since 0.3 */ public class MergePersistentMethod extends AbstractSavePersistentMethod { public static final String METHOD_SIGNATURE = "merge"; public static final Pattern METHOD_PATTERN = Pattern.compile('^' + METHOD_SIGNATURE + '$'); public MergePersistentMethod(SessionFactory sessionFactory, ClassLoader classLoader, GrailsApplication application, HibernateDatastore datastore) { super(METHOD_PATTERN, sessionFactory, classLoader, application, datastore); } public MergePersistentMethod(SessionFactory sessionFactory, ClassLoader classLoader, GrailsApplication application, GrailsDomainClass dc, HibernateDatastore datastore) { super(METHOD_PATTERN, sessionFactory, classLoader, application, dc, datastore); } /* (non-Javadoc) * @see org.codehaus.groovy.grails.orm.hibernate.metaclass.AbstractSavePersistentMethod#performSave(java.lang.Object) */ @Override protected Object performSave(final Object target, final boolean flush) { return getHibernateTemplate().execute(new HibernateCallback<Object>() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Object merged = session.merge(target); session.lock(merged, LockMode.NONE); if (flush) { getHibernateTemplate().flush(); } return merged; } }); } @Override protected Object performInsert(Object target, boolean shouldFlush) { throw new IllegalArgumentException("The [insert] argument is not supported by the [merge] method"); } }