org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy 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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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
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*/
package org.apache.openjpa.jdbc.meta.strats;
import java.sql.SQLException;
import java.util.Collections;
import java.util.Map;
import org.apache.openjpa.jdbc.kernel.JDBCStore;
import org.apache.openjpa.jdbc.meta.ClassMapping;
import org.apache.openjpa.jdbc.meta.Version;
import org.apache.openjpa.jdbc.meta.VersionStrategy;
import org.apache.openjpa.jdbc.sql.Joins;
import org.apache.openjpa.jdbc.sql.Result;
import org.apache.openjpa.jdbc.sql.Select;
import org.apache.openjpa.kernel.OpenJPAStateManager;
import org.apache.openjpa.kernel.StoreManager;
/**
* No-op strategy for easy extension.
*
* @author Abe White
*/
public abstract class AbstractVersionStrategy
extends AbstractStrategy
implements VersionStrategy {
/**
* The owning version.
*/
protected Version vers = null;
public void setVersion(Version owner) {
vers = owner;
}
public boolean select(Select sel, ClassMapping mapping) {
return false;
}
public Object load(OpenJPAStateManager sm, JDBCStore store, Result res)
throws SQLException {
return null;
}
public Object load(OpenJPAStateManager sm, JDBCStore store, Result res, Joins joins)
throws SQLException {
return null;
}
public void afterLoad(OpenJPAStateManager sm, JDBCStore store) {
}
public boolean checkVersion(OpenJPAStateManager sm, JDBCStore store,
boolean updateVersion)
throws SQLException {
return !updateVersion;
}
public int compareVersion(Object v1, Object v2) {
return StoreManager.VERSION_SAME;
}
public Map getBulkUpdateValues() {
return Collections.EMPTY_MAP;
}
}