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dbUnit is a JUnit extension (also usable from Ant and Maven) targeted for database-driven projects that, among other things, puts your database into a known state between test runs. This is an excellent way to avoid the myriad of problems that can occur when one test case corrupts the database and causes subsequent tests to fail or exacerbate the damage.

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/*
 *
 * 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 org.dbunit.database.IDatabaseConnection;
import org.dbunit.dataset.Column;
import org.dbunit.dataset.DataSetException;
import org.dbunit.dataset.ITable;
import org.dbunit.dataset.ITableMetaData;

import java.util.BitSet;

/**
 * Inserts the dataset contents into the database. This operation assumes that
 * table data does not exist in the database and fails if this is not the case.
 * To prevent problems with foreign keys, tables must be sequenced appropriately
 * in dataset.
 *
 * @author Manuel Laflamme
 * @version $Revision: 727 $
 * @since Feb 18, 2002
 */
public class InsertOperation extends AbstractBatchOperation
{

    /**
     * Logger for this class
     */
    private static final Logger logger = LoggerFactory.getLogger(InsertOperation.class);

    InsertOperation()
    {
    }

    ////////////////////////////////////////////////////////////////////////////
    // AbstractBatchOperation class

    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 });
    	}

        Column[] columns = metaData.getColumns();

        // insert
        StringBuffer sqlBuffer = new StringBuffer(128);
        sqlBuffer.append("insert into ");
        sqlBuffer.append(getQualifiedName(connection.getSchema(),
                metaData.getTableName(), connection));

        // columns
        sqlBuffer.append(" (");
        String columnSeparator = "";
        for (int i = 0; i < columns.length; i++)
        {
            if (!ignoreMapping.get(i))
            {
                // escape column name
                String columnName = getQualifiedName(null,
                        columns[i].getColumnName(), connection);
                sqlBuffer.append(columnSeparator);
                sqlBuffer.append(columnName);
                columnSeparator = ", ";
            }
        }

        // values
        sqlBuffer.append(") values (");
        String valueSeparator = "";
        for (int i = 0; i < columns.length; i++)
        {
            if (!ignoreMapping.get(i))
            {
                sqlBuffer.append(valueSeparator);
                sqlBuffer.append("?");
                valueSeparator = ", ";
            }
        }
        sqlBuffer.append(")");

        return new OperationData(sqlBuffer.toString(), columns);
    }

    protected BitSet getIgnoreMapping(ITable table, int row) throws DataSetException
    {
    	if(logger.isDebugEnabled())
    		logger.debug("getIgnoreMapping(table={}, row={}) - start", table, String.valueOf(row));

        Column[] columns = table.getTableMetaData().getColumns();

        BitSet ignoreMapping = new BitSet();
        for (int i = 0; i < columns.length; i++)
        {
            Object value = table.getValue(row, columns[i].getColumnName());
            if (value == ITable.NO_VALUE)
            {
                ignoreMapping.set(i);
            }
        }
        return ignoreMapping;
    }

    protected boolean equalsIgnoreMapping(BitSet ignoreMapping, ITable table,
            int row) throws DataSetException
    {
    	if (logger.isDebugEnabled())
    	{
    		logger.debug("equalsIgnoreMapping(ignoreMapping={}, table={}, row={}) - start",
    				new Object[]{ ignoreMapping, table, String.valueOf(row) });
    	}

        Column[] columns = table.getTableMetaData().getColumns();

        for (int i = 0; i < columns.length; i++)
        {
            boolean bit = ignoreMapping.get(i);
            Object value = table.getValue(row, columns[i].getColumnName());
            if ((bit && value != ITable.NO_VALUE) || (!bit && value == ITable.NO_VALUE))
            {
                return false;
            }
        }

        return true;
    }
}