/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. 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:
* 04/24/2009-2.0 Guy Pelletier
* - 270011: JPA 2.0 MappedById support
* 04/27/2010-2.1 Guy Pelletier
* - 309856: MappedSuperclasses from XML are not being initialized properly
* 03/24/2011-2.3 Guy Pelletier
* - 337323: Multi-tenant with shared schema support (part 1)
******************************************************************************/
package org.eclipse.persistence.internal.jpa.metadata.accessors.mappings;
import org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor;
import org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataAnnotatedElement;
/**
* A derived id class accessor is found within an entity's embedded id class
* and is a reference back to a parents id class.
*
* Key notes:
* - any metadata mapped from XML to this class must be compared in the
* equals method.
* - any metadata mapped from XML to this class must be handled in the merge
* method. (merging is done at the accessor/mapping level)
* - any metadata mapped from XML to this class must be initialized in the
* initXMLObject method.
* - methods should be preserved in alphabetical order.
*
* @author Guy Pelletier
* @since EclipseLink 1.2
*/
public class DerivedIdClassAccessor extends EmbeddedAccessor {
/**
* INTERNAL:
* Constructor called from an Embedabble IdClass.
*/
public DerivedIdClassAccessor(MetadataAnnotatedElement accessibleObject, ClassAccessor classAccessor) {
super(null, accessibleObject, classAccessor);
}
/**
* INTERNAL:
*/
@Override
public boolean equals(Object objectToCompare) {
return super.equals(objectToCompare) && objectToCompare instanceof DerivedIdClassAccessor;
}
@Override
public int hashCode() {
return super.hashCode();
}
/**
* INTERNAL:
* Return true if this accessor is a derived id class accessor. That is,
* an EmbeddedId that has a portion of its accessors mapped through an
* owning entities ManyToOne relationship using a MapsId.
*/
@Override
public boolean isDerivedIdClass(){
return true;
}
}