001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.collections.primitives.adapters; 018 019import java.util.Iterator; 020 021import org.apache.commons.collections.primitives.BooleanIterator; 022 023/** 024 * Adapts a {@link Boolean Boolean}-valued {@link java.util.Iterator Iterator} 025 * to the {@link org.apache.commons.collections.primitives.BooleanIterator 026 * BooleanIterator} interface. 027 * <p /> 028 * This implementation delegates most methods to the provided {@link 029 * java.util.Iterator Iterator} implementation in the "obvious" way. 030 * 031 * @since Commons Primitives 1.2 032 * @version $Revision: 480462 $ 033 */ 034public class IteratorBooleanIterator implements BooleanIterator { 035 036 /** 037 * Create an {@link org.apache.commons.collections.primitives.BooleanIterator 038 * BooleanIterator} wrapping the specified {@link java.util.Iterator 039 * Iterator}. When the given <i>iterator</i> is <code>null</code>, returns 040 * <code>null</code>. 041 * 042 * @param iterator the (possibly <code>null</code>) 043 * {@link java.util.Iterator Iterator} to wrap 044 * @return an {@link 045 * org.apache.commons.collections.primitives.BooleanIterator BooleanIterator} 046 * wrapping the given <i>iterator</i>, or <code>null</code> when <i> 047 * iterator</i> is <code>null</code>. 048 */ 049 public static BooleanIterator wrap(Iterator iterator) { 050 return null == iterator ? null : new IteratorBooleanIterator(iterator); 051 } 052 053 /** 054 * Creates an {@link org.apache.commons.collections.primitives.BooleanIterator 055 * BooleanIterator} wrapping the specified {@link java.util.Iterator Iterator}. 056 * @see #wrap 057 */ 058 public IteratorBooleanIterator(Iterator iterator) { 059 _iterator = iterator; 060 } 061 062 public boolean hasNext() { 063 return _iterator.hasNext(); 064 } 065 066 public boolean next() { 067 return ((Boolean)(_iterator.next())).booleanValue(); 068 } 069 070 public void remove() { 071 _iterator.remove(); 072 } 073 074 private Iterator _iterator = null; 075 076}