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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 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 (GPL).
 *
 * 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.fixedwidth;

import java.io.IOException;

import org.databene.commons.BeanUtil;
import org.databene.commons.format.PadFormat;
import org.databene.webdecs.DataContainer;
import org.databene.webdecs.util.DataIteratorAdapter;

/**
 * Iterates fixed-width column files.


 * Created: 20.12.2011 18:13:28
 * @since 0.6.6
 * @author Volker Bergmann
 */
public class FixedWidthBeanIterator extends DataIteratorAdapter {

	Class beanClass;
	FixedWidthColumnDescriptor[] columnDescriptors;
	
	public FixedWidthBeanIterator(String uri, String encoding, Class beanClass, String columnFormats) 
			throws IOException {
		super(null);
		this.beanClass = beanClass;
		this.columnDescriptors = FixedWidthUtil.parseColumnsSpec(columnFormats);
		PadFormat[] formats = BeanUtil.extractProperties(this.columnDescriptors, "format", PadFormat.class);
		source = new FixedWidthLineIterator(uri, formats);
	}

	public Class getType() {
		return beanClass;
	}

	public DataContainer next(DataContainer container) {
		DataContainer wrapper = source.next(getSourceContainer());
		if (wrapper == null)
			return null;
		String[] cells = wrapper.getData();
		E result = BeanUtil.newInstance(beanClass);
		for (int i = 0; i < columnDescriptors.length; i++)
			BeanUtil.setPropertyValue(result, columnDescriptors[i].getName(), cells[i], true, true);
		return container.setData(result);
	}

}