/*
 * Copyright (C) 2008 The Guava Authors
 *
 * 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.google.common.collect;

import java.util.Iterator;

import com.google.common.annotations.GwtCompatible;

/**
 * An iterator that does not support {@link #remove}.
 *
 * @author Jared Levy
 * @since 2.0 (imported from Google Collections Library)
 */
@GwtCompatible
public abstract class UnmodifiableIterator<E> implements Iterator<E> {
	/** Constructor for use by subclasses. */
	protected UnmodifiableIterator() {
	}

	/**
	 * Guaranteed to throw an exception and leave the underlying data unmodified.
	 *
	 * @throws UnsupportedOperationException always
	 * @deprecated Unsupported operation.
	 */
	@Deprecated
	@Override
	public final void remove() {
		throw new UnsupportedOperationException();
	}
}
