org.apache.openjpa.jdbc.sql.RowManager 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
* regarding copyright ownership. The ASF licenses this file
* 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
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.jdbc.sql;
import java.sql.SQLException;
import org.apache.openjpa.jdbc.schema.Table;
import org.apache.openjpa.kernel.OpenJPAStateManager;
/**
* Manages rows during an insert/update/delete process. Row managers
* do not have to be threadsafe.
*
* @author Abe White
*/
public interface RowManager {
/**
* Return the row for the given table and owner object, or null if
* create is false and the row has not already been created.
* The action must be one of {@link Row#ACTION_INSERT},
* {@link Row#ACTION_UPDATE}, {@link Row#ACTION_DELETE}.
*/
public Row getRow(Table table, int action, OpenJPAStateManager sm,
boolean create);
/**
* Return a row for the given secondary table.
* The action must be one of {@link Row#ACTION_INSERT},
* {@link Row#ACTION_UPDATE}, {@link Row#ACTION_DELETE}.
* Note that secondary rows are not considered when creating the foreign
* key dependency graph, with can cause constraint violations when using
* the UPDATE action. Only use this action if the secondary
* row does not have restrict-action foreign keys. Otherwise use both
* a delete and then an insert to perform the update.
*/
public Row getSecondaryRow(Table table, int action);
/**
* Flush the secondary row; after flushing the row is available for reuse.
* It will retain all previously set values.
*/
public void flushSecondaryRow(Row row)
throws SQLException;
/**
* Return a logical row representing an update that should be made to
* all rows of the given table. The action must be one of
* {@link Row#ACTION_UPDATE}, {@link Row#ACTION_DELETE}.
*/
public Row getAllRows(Table table, int action);
/**
* Flush the logical row.
*/
public void flushAllRows(Row row)
throws SQLException;
}