| /******************************************************************************* |
| * Copyright (c) 2009, 2010 Oracle. All rights reserved. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v1.0, which accompanies this distribution |
| * and is available at http://www.eclipse.org/legal/epl-v10.html. |
| * |
| * Contributors: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.core.context.java; |
| |
| import org.eclipse.jpt.core.JpaFactory; |
| import org.eclipse.jpt.core.MappingKeys; |
| |
| /** |
| * This mapping definition implementation is used to describe the default mapping for |
| * a java attribute when no other mapping applies. |
| * |
| * Provisional API: This interface is part of an interim API that is still |
| * under development and expected to change significantly before reaching |
| * stability. It is available at this early stage to solicit feedback from |
| * pioneering adopters on the understanding that any code that uses this API |
| * will almost certainly be broken (repeatedly) as the API evolves. |
| * |
| * @version 2.3 |
| * @since 2.3 |
| */ |
| public class NullDefaultJavaAttributeMappingDefinition |
| implements JavaAttributeMappingDefinition |
| { |
| // singleton |
| private static final NullDefaultJavaAttributeMappingDefinition INSTANCE = |
| new NullDefaultJavaAttributeMappingDefinition(); |
| |
| |
| /** |
| * Return the singleton. |
| */ |
| public static JavaAttributeMappingDefinition instance() { |
| return INSTANCE; |
| } |
| |
| |
| /** |
| * Enforce singleton usage |
| */ |
| private NullDefaultJavaAttributeMappingDefinition() { |
| super(); |
| } |
| |
| |
| public String getKey() { |
| return MappingKeys.NULL_ATTRIBUTE_MAPPING_KEY; |
| } |
| |
| public String getAnnotationName() { |
| return null; |
| } |
| |
| /** |
| * Default mappings should never be null |
| */ |
| public JavaAttributeMapping buildMapping(JavaPersistentAttribute parent, JpaFactory factory) { |
| return factory.buildJavaNullAttributeMapping(parent); |
| } |
| |
| /** |
| * This is typically the final test, so it should always apply |
| */ |
| public boolean testDefault(JavaPersistentAttribute persistentAttribute) { |
| return true; |
| } |
| |
| /** |
| * Obviously, always false |
| */ |
| public boolean testSpecified(JavaPersistentAttribute persistentAttribute) { |
| return false; |
| } |
| } |