001/* 002 * #%L 003 * Netarchivesuite - common 004 * %% 005 * Copyright (C) 2005 - 2014 The Royal Danish Library, the Danish State and University Library, 006 * the National Library of France and the Austrian National Library. 007 * %% 008 * This program is free software: you can redistribute it and/or modify 009 * it under the terms of the GNU Lesser General Public License as 010 * published by the Free Software Foundation, either version 2.1 of the 011 * License, or (at your option) any later version. 012 * 013 * This program is distributed in the hope that it will be useful, 014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 016 * GNU General Lesser Public License for more details. 017 * 018 * You should have received a copy of the GNU General Lesser Public 019 * License along with this program. If not, see 020 * <http://www.gnu.org/licenses/lgpl-2.1.html>. 021 * #L% 022 */ 023 024package dk.netarkivet.common.utils; 025 026/** 027 * Implements access to an array in a read-only fashion. 028 */ 029public class ReadOnlyByteArray { 030 031 private byte[] array; 032 033 /** 034 * Creates a new instance based on the given array. 035 * 036 * @param array Array to provide read-only access to. The array will not be copied by this class. 037 */ 038 public ReadOnlyByteArray(byte[] array) { 039 this.array = array; 040 } 041 042 /** 043 * Returns the length of the array. 044 * 045 * @return The length of the array. Always >= 0. 046 */ 047 public int length() { 048 return array.length; 049 } 050 051 /** 052 * Gets the element at the given index. 053 * 054 * @param index The index to get the element at. 055 * @return The byte at the given index. 056 * @throws IndexOutOfBoundsException if the index is < 0 or > length() 057 */ 058 public byte get(int index) { 059 return array[index]; 060 } 061 062}