/*
 * Copyright 2013 serso aka se.solovyev
 *
 * 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.
 *
 * ---------------------------------------------------------------------
 * Contact details
 *
 * Email: se.solovyev@gmail.com
 * Site:  http://se.solovyev.org
 */

package org.solovyev.common.collections;

import javax.annotation.Nonnull;
import java.util.Iterator;

public final class UnmodifiableIterator<T> implements Iterator<T> {

	/*
	**********************************************************************
	*
	*                           FIELDS
	*
	**********************************************************************
	*/
	@Nonnull
	private final Iterator<? extends T> i;

	/*
	**********************************************************************
	*
	*                           CONSTRUCTORS
	*
	**********************************************************************
	*/

	private UnmodifiableIterator(@Nonnull Iterator<? extends T> i) {
		this.i = i;
	}

	public static <T> UnmodifiableIterator<T> wrap(@Nonnull Iterator<? extends T> i) {
		return new UnmodifiableIterator<T>(i);
	}

	/*
	**********************************************************************
	*
	*                           METHODS
	*
	**********************************************************************
	*/

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

	@Override
	public T next() {
		return i.next();
	}

	@Override
	public void remove() {
		throw new UnsupportedOperationException();
	}
}
