org.apache.openjpa.event.OrphanedKeyAction Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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*/
package org.apache.openjpa.event;
import org.apache.openjpa.kernel.OpenJPAStateManager;
import org.apache.openjpa.meta.ValueMetaData;
/**
* Perform an action when OpenJPA detects an orphaned key in the database.
*
* @author Abe White
* @since 0.3.2.2
*/
public interface OrphanedKeyAction {
/**
* Callback received when OpenJPA discovers an orphaned key.
*
* @param oid the orphaned key
* @param sm the instance representing the record in which the
* key was discovered; may be null
* @param vmd the value in which the key was discovered
* @return the value to load into field fmd; typically
* null
*/
Object orphan(Object oid, OpenJPAStateManager sm, ValueMetaData vmd);
}