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'Databene Formats' is an open source software library for supporting data file and other formats like CSV, fixed width files, XLS, Properties and Regex. It is designed for multithreaded use and high performance.

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/*
 * Copyright (C) 2011-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * Licensed 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.databene.formats.csv;

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

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

/**
 * Parses CSV files and converts the row to the desired target type.
 * Created at 25.04.2008 18:49:50
 * @param  the type of the objects to provide
 * @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;
	}

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

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

	@Override
	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;
	}

}