/*
*
* The DbUnit Database Testing Framework
* Copyright (C)2002-2004, DbUnit.org
*
* This library 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 library 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
package org.dbunit.operation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.BitSet;
import org.dbunit.DatabaseUnitException;
import org.dbunit.database.IDatabaseConnection;
import org.dbunit.dataset.Column;
import org.dbunit.dataset.DataSetException;
import org.dbunit.dataset.IDataSet;
import org.dbunit.dataset.ITableIterator;
import org.dbunit.dataset.ITableMetaData;
import org.dbunit.dataset.NoPrimaryKeyException;
/**
* Deletes only the dataset contents from the database. This operation does not
* delete the entire table contents but only data that are present in the
* dataset.
*
* @author Manuel Laflamme
* @version $Revision: 675 $
* @since Feb 19, 2002
*/
public class DeleteOperation extends AbstractBatchOperation
{
/**
* Logger for this class
*/
private static final Logger logger = LoggerFactory.getLogger(DeleteOperation.class);
DeleteOperation()
{
_reverseRowOrder = true;
}
////////////////////////////////////////////////////////////////////////////
// AbstractBatchOperation class
protected ITableIterator iterator(IDataSet dataSet) throws DatabaseUnitException
{
logger.debug("iterator(dataSet={}) - start", dataSet);
return dataSet.reverseIterator();
}
public OperationData getOperationData(ITableMetaData metaData, BitSet ignoreMapping, IDatabaseConnection connection) throws DataSetException
{
if (logger.isDebugEnabled())
{
logger.debug("getOperationData(metaData={}, ignoreMapping={}, connection={}) - start",
new Object[]{ metaData, ignoreMapping, connection });
}
// cannot construct where clause if no primary key
Column[] primaryKeys = metaData.getPrimaryKeys();
if (primaryKeys.length == 0)
{
throw new NoPrimaryKeyException(metaData.getTableName());
}
// delete from
StringBuffer sqlBuffer = new StringBuffer(128);
sqlBuffer.append("delete from ");
sqlBuffer.append(getQualifiedName(connection.getSchema(),
metaData.getTableName(), connection));
// where
sqlBuffer.append(" where ");
for (int i = 0; i < primaryKeys.length; i++)
{
// escape column name
String columnName = getQualifiedName(null,
primaryKeys[i].getColumnName(), connection);
sqlBuffer.append(columnName);
sqlBuffer.append(" = ?");
if (i + 1 < primaryKeys.length)
{
sqlBuffer.append(" and ");
}
}
return new OperationData(sqlBuffer.toString(), primaryKeys);
}
}