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'databene commons' is an open source Java library by Volker Bergmann.
It provides extensions to the Java core library by utility classes, abstract concepts
and concrete implementations.
/*
* Copyright (C) 2004-2015 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.commons.iterator;
import org.databene.commons.Converter;
import org.databene.commons.HeavyweightIterator;
import org.databene.commons.IOUtil;
import java.io.Closeable;
import java.util.Iterator;
/**
* Iterator proxy that converts iterated objects before providing them to the caller.
* Created: 16.08.2007 06:34:59
* @param the type to iterate
* @param the type to provide
* @author Volker Bergmann
*/
public class ConvertingIterator implements HeavyweightIterator {
protected Iterator source;
protected Converter converter;
public ConvertingIterator(Iterator source, Converter converter) {
this.source = source;
this.converter = converter;
}
@Override
public void close() {
if (source instanceof Closeable)
IOUtil.close((Closeable) source);
}
@Override
public boolean hasNext() {
return source.hasNext();
}
@Override
public T next() {
S sourceValue = source.next();
return converter.convert(sourceValue);
}
@Override
public void remove() {
source.remove();
}
}