ImmutableIterator.java

  1. /*
  2.  * Licensed to the Apache Software Foundation (ASF) under one
  3.  * or more contributor license agreements.  See the NOTICE file
  4.  * distributed with this work for additional information
  5.  * regarding copyright ownership.  The ASF licenses this file
  6.  * to you under the Apache License, Version 2.0 (the
  7.  * "License"); you may not use this file except in compliance
  8.  * with the License.  You may obtain a copy of the License at
  9.  *
  10.  *   http://www.apache.org/licenses/LICENSE-2.0
  11.  *
  12.  * Unless required by applicable law or agreed to in writing,
  13.  * software distributed under the License is distributed on an
  14.  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  15.  * KIND, either express or implied.  See the License for the
  16.  * specific language governing permissions and limitations
  17.  * under the License.
  18.  */
  19. package org.apache.commons.jcs3.jcache;

  20. import java.util.Iterator;

  21. public class ImmutableIterator<T> implements Iterator<T>
  22. {
  23.     private final Iterator<T> delegate;

  24.     public ImmutableIterator(final Iterator<T> delegate)
  25.     {
  26.         this.delegate = delegate;
  27.     }

  28.     @Override
  29.     public boolean hasNext()
  30.     {
  31.         return delegate.hasNext();
  32.     }

  33.     @Override
  34.     public T next()
  35.     {
  36.         return delegate.next();
  37.     }

  38.     @Override
  39.     public void remove()
  40.     {
  41.         throw new UnsupportedOperationException("this iterator is immutable");
  42.     }
  43. }