| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.commons.collections4.iterators; |
| |
| import java.util.Enumeration; |
| import java.util.Iterator; |
| |
| /** |
| * Adapter to make an {@link Iterator Iterator} instance appear to be an |
| * {@link Enumeration Enumeration} instance. |
| * |
| * @param <E> the type of elements returned by this iterator. |
| * @since 1.0 |
| */ |
| public class IteratorEnumeration<E> implements Enumeration<E> { |
| |
| /** The iterator being decorated. */ |
| private Iterator<? extends E> iterator; |
| |
| /** |
| * Constructs a new {@code IteratorEnumeration} that will not function |
| * until {@link #setIterator(Iterator) setIterator} is invoked. |
| */ |
| public IteratorEnumeration() { |
| } |
| |
| /** |
| * Constructs a new {@code IteratorEnumeration} that will use the given |
| * iterator. |
| * |
| * @param iterator the iterator to use |
| */ |
| public IteratorEnumeration(final Iterator<? extends E> iterator) { |
| this.iterator = iterator; |
| } |
| |
| // Iterator interface |
| //------------------------------------------------------------------------- |
| |
| /** |
| * Returns true if the underlying iterator has more elements. |
| * |
| * @return true if the underlying iterator has more elements |
| */ |
| @Override |
| public boolean hasMoreElements() { |
| return iterator.hasNext(); |
| } |
| |
| /** |
| * Returns the next element from the underlying iterator. |
| * |
| * @return the next element from the underlying iterator. |
| * @throws java.util.NoSuchElementException if the underlying iterator has |
| * no more elements |
| */ |
| @Override |
| public E nextElement() { |
| return iterator.next(); |
| } |
| |
| // Properties |
| //------------------------------------------------------------------------- |
| |
| /** |
| * Returns the underlying iterator. |
| * |
| * @return the underlying iterator |
| */ |
| public Iterator<? extends E> getIterator() { |
| return iterator; |
| } |
| |
| /** |
| * Sets the underlying iterator. |
| * |
| * @param iterator the new underlying iterator |
| */ |
| public void setIterator(final Iterator<? extends E> iterator) { |
| this.iterator = iterator; |
| } |
| |
| } |