org.databene.webdecs.util.ConvertingDataSource Maven / Gradle / Ivy
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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.webdecs.util;
import java.io.Closeable;
import org.databene.commons.Converter;
import org.databene.commons.IOUtil;
import org.databene.webdecs.DataIterator;
import org.databene.webdecs.DataSource;
/**
* {@link DataSource} proxy which applies a {@link Converter} to the source's data.
* Created: 24.07.2011 10:06:31
* @since 0.6.0
* @author Volker Bergmann
*/
public class ConvertingDataSource extends DataSourceAdapter {
protected Converter converter;
public ConvertingDataSource(DataSource source, Converter converter) {
super(source, converter.getTargetType());
this.converter = converter;
}
public Class getType() {
return converter.getTargetType();
}
public DataIterator iterator() {
return new ConvertingDataIterator(source.iterator(), converter);
}
@Override
public void close() {
if (converter instanceof Closeable)
IOUtil.close((Closeable) converter);
super.close();
}
@Override
public String toString() {
return getClass().getSimpleName() + '[' + source + " -> " + converter + ']';
}
}