1 /*
2  * Copyright (C) 2008 The Guava Authors
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.google.common.collect;
18 
19 import com.google.common.annotations.GwtCompatible;
20 
21 import java.util.Iterator;
22 
23 /**
24  * An iterator that does not support {@link #remove}.
25  *
26  * @author Jared Levy
27  * @since 2.0 (imported from Google Collections Library)
28  */
29 @GwtCompatible
30 public abstract class UnmodifiableIterator<E> implements Iterator<E> {
31   /** Constructor for use by subclasses. */
UnmodifiableIterator()32   protected UnmodifiableIterator() {}
33 
34   /**
35    * Guaranteed to throw an exception and leave the underlying data unmodified.
36    *
37    * @throws UnsupportedOperationException always
38    * @deprecated Unsupported operation.
39    */
40   @Deprecated
41   @Override
remove()42   public final void remove() {
43     throw new UnsupportedOperationException();
44   }
45 }
46