/******************************************************************************* | |
* Copyright (c) 1998, 2013 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: | |
* Oracle - initial API and implementation from Oracle TopLink | |
******************************************************************************/ | |
package org.eclipse.persistence.internal.helper; | |
import java.util.Comparator; | |
import org.eclipse.persistence.mappings.DatabaseMapping; | |
/** | |
* INTERNAL: | |
* Use to Sort The mappings in ClassDescriptor, Mappings are either DirectToField, which must be at the top | |
* or other | |
* Avoid using this class as sun.misc is not part of many VM's like Netscapes. | |
* | |
*/ | |
public class MappingCompare implements Comparator { | |
public int compare(Object arg1, Object arg2) { | |
int arg1Value = ((DatabaseMapping)arg1).getWeight().intValue(); | |
int arg2Value = ((DatabaseMapping)arg2).getWeight().intValue(); | |
if (arg1Value == arg2Value) { | |
int result = ((DatabaseMapping)arg1).getClass().getName().compareTo(((DatabaseMapping)arg2).getClass().getName()); | |
// For same classes, compare attribute names. | |
if (result == 0) { | |
// Can be null for TransformationMapping. | |
if (((DatabaseMapping)arg1).getAttributeName() != null && ((DatabaseMapping)arg2).getAttributeName() != null) { | |
result = ((DatabaseMapping)arg1).getAttributeName().compareTo(((DatabaseMapping)arg2).getAttributeName()); | |
} | |
} | |
return result; | |
} | |
return (arg1Value - arg2Value); | |
} | |
} |