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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.

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/*
 * 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 java.util.Iterator;

/**
 * Wraps a JDK {@link Iterator} into a {@link BidirectionalIterator}, 
 * making the unsupported operations throw an {@link UnsupportedOperationException}.
 * Created: 12.06.2007 19:51:44
 * @param  the type to be wrapped
 * @author Volker Bergmann
 */
public class JDKIteratorWrapper implements BidirectionalIterator {

    private Iterator realIterator;

    public JDKIteratorWrapper(Iterator realIterator) {
        this.realIterator = realIterator;
    }

    @Override
	public boolean hasNext() {
        return realIterator.hasNext();
    }

    @Override
	public E next() {
        return realIterator.next();
    }

    @Override
	public void remove() {
        realIterator.remove();
    }

    @Override
	public E first() {
        throw new UnsupportedOperationException("Operation not supported");
    }

    @Override
	public boolean hasPrevious() {
        throw new UnsupportedOperationException("Operation not supported");
    }

    @Override
	public E previous() {
        throw new UnsupportedOperationException("Operation not supported");
    }

    @Override
	public E last() {
        throw new UnsupportedOperationException("Operation not supported");
    }
}