jpa/plugins/org.eclipse.jpt.eclipselink.core/src/org/eclipse/jpt/eclipselink/core/internal/v2_0/context/java/JavaEclipseLinkIdMappingDefinition2_0.java

/*******************************************************************************
 * Copyright (c) 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.eclipselink.core.internal.v2_0.context.java;

import org.eclipse.jpt.core.context.java.JavaAttributeMappingDefinition;
import org.eclipse.jpt.core.context.java.JavaPersistentAttribute;
import org.eclipse.jpt.core.internal.jpa2.context.java.AbstractJavaIdMappingDefinition2_0;
import org.eclipse.jpt.eclipselink.core.internal.context.java.JavaEclipseLinkBasicMappingDefinition;
import org.eclipse.jpt.utility.internal.ArrayTools;
import org.eclipse.jpt.utility.internal.Tools;
import org.eclipse.jpt.utility.internal.iterables.ArrayIterable;

public class JavaEclipseLinkIdMappingDefinition2_0
	extends AbstractJavaIdMappingDefinition2_0
{
	// singleton
	private static final JavaAttributeMappingDefinition INSTANCE = new JavaEclipseLinkIdMappingDefinition2_0();

	/**
	 * Return the singleton.
	 */
	public static JavaAttributeMappingDefinition instance() {
		return INSTANCE;
	}


	/**
	 * Enforce singleton usage
	 */
	private JavaEclipseLinkIdMappingDefinition2_0() {
		super();
	}

	/**
	 * EclipseLink supports default M:1 mappings.
	 */
	@Override
	protected boolean attributeHasManyToOneMapping(JavaPersistentAttribute persistentAttribute) {
		return super.attributeHasManyToOneMapping(persistentAttribute) ||
				Tools.valuesAreEqual(persistentAttribute.getDefaultMappingKey(), JavaEclipseLinkManyToOneMappingDefinition2_0.instance().getKey());
	}

	/**
	 * EclipseLink supports default 1:1 mappings.
	 */
	@Override
	protected boolean attributeHasOneToOneMapping(JavaPersistentAttribute persistentAttribute) {
		return super.attributeHasOneToOneMapping(persistentAttribute) ||
				Tools.valuesAreEqual(persistentAttribute.getDefaultMappingKey(), JavaEclipseLinkOneToOneMappingDefinition2_0.instance().getKey());
	}

	@Override
	public Iterable<String> getSupportingAnnotationNames() {
		return COMBINED_SUPPORTING_ANNOTATION_NAMES;
	}

	protected static final String[] COMBINED_SUPPORTING_ANNOTATION_NAMES_ARRAY = ArrayTools.concatenate(
		SUPPORTING_ANNOTATION_NAMES_ARRAY,
		JavaEclipseLinkBasicMappingDefinition.ECLIPSE_LINK_SUPPORTING_ANNOTATION_NAMES_ARRAY
	);
	protected static final Iterable<String> COMBINED_SUPPORTING_ANNOTATION_NAMES = new ArrayIterable<String>(COMBINED_SUPPORTING_ANNOTATION_NAMES_ARRAY);
}