001/*
002 * Copyright (C) 2010 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect;
018
019import com.google.common.annotations.GwtCompatible;
020import java.util.ListIterator;
021
022/**
023 * A list iterator that does not support {@link #remove}, {@link #add}, or {@link #set}.
024 *
025 * @since 7.0
026 * @author Louis Wasserman
027 */
028@GwtCompatible
029public abstract class UnmodifiableListIterator<E> extends UnmodifiableIterator<E>
030    implements ListIterator<E> {
031  /** Constructor for use by subclasses. */
032  protected UnmodifiableListIterator() {}
033
034  /**
035   * Guaranteed to throw an exception and leave the underlying data unmodified.
036   *
037   * @throws UnsupportedOperationException always
038   * @deprecated Unsupported operation.
039   */
040  @Deprecated
041  @Override
042  public final void add(E e) {
043    throw new UnsupportedOperationException();
044  }
045
046  /**
047   * Guaranteed to throw an exception and leave the underlying data unmodified.
048   *
049   * @throws UnsupportedOperationException always
050   * @deprecated Unsupported operation.
051   */
052  @Deprecated
053  @Override
054  public final void set(E e) {
055    throw new UnsupportedOperationException();
056  }
057}