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'databene webdecs' is an open source software library for WEB Data Extraction, Conversion and Scripting, written by Volker Bergmann.
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/*
 * (c) Copyright 2008-2011 by Volker Bergmann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted under the terms of the
 * GNU General Public License.
 *
 * For redistributing this software or a derivative work under a license other
 * than the GPL-compatible Free Software License as defined by the Free
 * Software Foundation or approved by OSI, you must first obtain a commercial
 * license to this software product from Volker Bergmann.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
 * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
 * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package org.databene.document.csv;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.databene.commons.Converter;
import org.databene.webdecs.DataContainer;
import org.databene.webdecs.DataIterator;
import org.databene.webdecs.util.ThreadLocalDataContainer;

/**
 * Parses CSV files and converts the row to the desired target type.


 * Created at 25.04.2008 18:49:50
 * @since 0.4.2
 * @author Volker Bergmann
 */
public class ConvertingCSVParser implements DataIterator{
	
	private Converter rowConverter;
	private CSVLineIterator source;
	private ThreadLocalDataContainer dataContainer = new ThreadLocalDataContainer();
	
	public ConvertingCSVParser(String uri, Converter rowConverter) throws IOException {
		this.source = new CSVLineIterator(uri);
		this.rowConverter = rowConverter;
	}

	public Class getType() {
		return rowConverter.getTargetType();
	}

	public DataContainer next(DataContainer wrapper) {
		DataContainer tmp = source.next(dataContainer.get());
		if (tmp == null)
			return null;
		return wrapper.setData(rowConverter.convert(tmp.getData()));
	}

	public void close() {
		source.close();
	}
	
	public static  List parse(String uri, Converter rowConverter) throws IOException {
		return parse(uri, rowConverter, new ArrayList());
	}
	
	public static  List parse(String uri, Converter rowConverter, List list) throws IOException {
		ConvertingCSVParser parser = new ConvertingCSVParser(uri, rowConverter);
		DataContainer container = new DataContainer();
		while ((container = parser.next(container)) != null)
			list.add(container.getData());
		return list;
	}

}