/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ejb.plugins.cmp.jdbc;
import org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge;
/**
* This class represents one pair of entities in a relation.
*
* @author <a href="mailto:dain@daingroup.com">Dain Sundstrom</a>
* @version $Revision: 81030 $
*/
public final class RelationPair {
private final JDBCCMRFieldBridge leftCMRField;
private final JDBCCMRFieldBridge rightCMRField;
private final Object leftId;
private final Object rightId;
public RelationPair(
JDBCCMRFieldBridge leftCMRField, Object leftId,
JDBCCMRFieldBridge rightCMRField, Object rightId) {
this.leftCMRField = leftCMRField;
this.leftId = leftId;
this.rightCMRField = rightCMRField;
this.rightId = rightId;
}
public Object getLeftId() {
return leftId;
}
public Object getRightId() {
return rightId;
}
public boolean equals(Object obj) {
if(obj instanceof RelationPair) {
RelationPair pair = (RelationPair) obj;
// check left==left and right==right
if(leftCMRField == pair.leftCMRField &&
rightCMRField == pair.rightCMRField &&
leftId.equals(pair.leftId) &&
rightId.equals(pair.rightId)) {
return true;
}
// check left==right and right==left
if(leftCMRField == pair.rightCMRField &&
rightCMRField == pair.leftCMRField &&
leftId.equals(pair.rightId) &&
rightId.equals(pair.leftId)) {
return true;
}
}
return false;
}
public int hashCode() {
return leftId.hashCode() ^ rightId.hashCode();
}
}