001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020package org.apache.directory.shared.util; 021 022 023import java.util.Enumeration; 024import java.util.NoSuchElementException; 025 026 027/** 028 * An enumeration wrapper around an array. 029 * 030 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 031 */ 032@SuppressWarnings("rawtypes") 033public class ArrayEnumeration implements Enumeration 034{ 035 /** the index into the array */ 036 private int index = 0; 037 038 /** Underlying array that is wrapped */ 039 private final Object[] array; 040 041 042 /** 043 * Constructs an enumeration by wrapping an array. 044 * 045 * @param array 046 * the underlying array that is wrapped 047 */ 048 public ArrayEnumeration(Object[] array) 049 { 050 if ( array != null ) 051 { 052 this.array = new Object[ array.length ]; 053 System.arraycopy( array, 0, this.array, 0, array.length ); 054 } else { 055 this.array = null; 056 } 057 } 058 059 060 public final boolean hasMoreElements() 061 { 062 return array != null && array.length != 0 && index < array.length; 063 } 064 065 066 public Object nextElement() 067 { 068 if ( !hasMoreElements() ) 069 { 070 throw new NoSuchElementException( "no more objects in array" ); 071 } 072 073 return array[index++]; 074 } 075}