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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.dataset.xml;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;

import org.dbunit.dataset.CachedDataSet;
import org.dbunit.dataset.DataSetException;
import org.dbunit.dataset.IDataSet;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.InputSource;

/**
 * Reads and writes original XML dataset document. This format
 * is very verbose and must conform to the following DTD:
 * 
<?xml version="1.0" encoding="UTF-8"?>
<!ELEMENT dataset (table+)>
<!ELEMENT table (column*, row*)>
<!ATTLIST table name CDATA #REQUIRED>
<!ELEMENT column (#PCDATA)>
<!ELEMENT row (value | null | none)*>
<!ELEMENT value (#PCDATA)>
<!ELEMENT null EMPTY>
<!ELEMENT none EMPTY>


 *
 * @author Manuel Laflamme
 * @author Last changed by: $Author$
 * @version $Revision$ $Date$
 * @since 1.0 (Feb 17, 2002)
 */
public class XmlDataSet extends CachedDataSet
{

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


    /**
     * Creates an XmlDataSet with the specified xml reader.
     */
    public XmlDataSet(Reader reader) throws DataSetException
    {
        super(new XmlProducer(new InputSource(reader)));
    }

    /**
     * Creates an XmlDataSet with the specified xml input stream.
     */
    public XmlDataSet(InputStream in) throws DataSetException
    {
        super(new XmlProducer(new InputSource(in)));
    }

    /**
     * Write the specified dataset to the specified output stream as xml.
     */
    public static void write(IDataSet dataSet, OutputStream out)
            throws IOException, DataSetException
    {
        logger.debug("write(dataSet={}, out={}) - start", dataSet, out);
        XmlDataSet.write(dataSet, out, null);
    }

    /**
     * Write the specified dataset to the specified output stream as xml (using specified encoding).
     */
    public static void write(IDataSet dataSet, OutputStream out, String encoding)
            throws IOException, DataSetException
    {
        logger.debug("write(dataSet={}, out={}, encoding={}) - start", 
                new Object[]{dataSet, out, encoding} );
        
        XmlDataSetWriter datasetWriter = new XmlDataSetWriter(out, encoding);
        datasetWriter.write(dataSet);
    }

    /**
     * Write the specified dataset to the specified writer as xml.
     */
    public static void write(IDataSet dataSet, Writer writer)
            throws IOException, DataSetException
    {
        logger.debug("write(dataSet={}, writer={}) - start", dataSet, writer);
        write(dataSet, writer, null);
    }

    /**
     * Write the specified dataset to the specified writer as xml.
     */
    public static void write(IDataSet dataSet, Writer writer, String encoding)
            throws IOException, DataSetException
    {
    	if (logger.isDebugEnabled())
    		logger.debug("write(dataSet={}, writer={}, encoding={}) - start",
    				new Object[]{ dataSet, writer, encoding });

        XmlDataSetWriter datasetWriter = new XmlDataSetWriter(writer, encoding);
        datasetWriter.write(dataSet);
    }
}