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/*
 * Copyright (C) 2004-2014 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
 * @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();
    }
    
}