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'rapiddweller Common' is an open source Java library
forked from Databene Commons 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 com.rapiddweller.common.iterator;
import com.rapiddweller.common.Converter;
import com.rapiddweller.common.HeavyweightIterator;
import com.rapiddweller.common.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 {
/**
* The Source.
*/
protected Iterator source;
/**
* The Converter.
*/
protected Converter converter;
/**
* Instantiates a new Converting iterator.
*
* @param source the source
* @param converter the 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();
}
}