| /******************************************************************************* | |
| * Copyright (c) 1998, 2009 Oracle. All rights reserved. | |
| * This program and the accompanying materials are made available under the | |
| * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 | |
| * which accompanies this distribution. | |
| * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html | |
| * and the Eclipse Distribution License is available at | |
| * http://www.eclipse.org/org/documents/edl-v10.php. | |
| * | |
| * Contributors: | |
| * dclarke - TODO | |
| ******************************************************************************/ | |
| package model.persistence; | |
| import org.eclipse.persistence.config.DescriptorCustomizer; | |
| import org.eclipse.persistence.descriptors.ClassDescriptor; | |
| import org.eclipse.persistence.mappings.OneToOneMapping; | |
| import org.eclipse.persistence.queries.FetchGroup; | |
| import org.eclipse.persistence.queries.ReadObjectQuery; | |
| /** | |
| * Customize the PhoneNumber.owner relationship to use a minimal FetchGroup so | |
| * that if it is being resolved to a partial entity in the persistence context | |
| * it will not force the entire entity to be resolved. | |
| * <p> | |
| * This type of configuration will be required on mappings where the user wants | |
| * the 1:1 or M:1 lookup to simply connect to the partially entity already in the | |
| * context. | |
| * | |
| * @author dclarke | |
| * @since EclipseLink 1.2 | |
| */ | |
| public class PhoneNumberCustomizer implements DescriptorCustomizer { | |
| public void customize(ClassDescriptor descriptor) throws Exception { | |
| FetchGroup minEmpFG = new FetchGroup(); | |
| minEmpFG.addAttribute("id"); | |
| OneToOneMapping ownerMapping = (OneToOneMapping) descriptor.getMappingForAttributeName("owner"); | |
| ((ReadObjectQuery)ownerMapping.getSelectionQuery()).setFetchGroup(minEmpFG); | |
| } | |
| } |