001 /* 002 * Copyright (c) 2000 - 2006 The Legion Of The Bouncy Castle (http://www.bouncycastle.org) 003 * 004 * Permission is hereby granted, free of charge, to any person obtaining a copy of this 005 * software and associated documentation files (the "Software"), to deal in the Software 006 * without restriction, including without limitation the rights to use, copy, modify, 007 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to 008 * permit persons to whom the Software is furnished to do so, subject to the following 009 * conditions: 010 * 011 * The above copyright notice and this permission notice shall be included in all copies 012 * or substantial portions of the Software. 013 * 014 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 015 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 016 * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 017 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 018 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 019 * DEALINGS IN THE SOFTWARE. 020 * 021 */ 022 023 package org.apache.directory.shared.asn1.der; 024 025 026 /** 027 * DER Enumerated object. 028 */ 029 public class DEREnumerated extends DERObject 030 { 031 /** 032 * Basic DERObject constructor. 033 */ 034 public DEREnumerated(byte[] value) 035 { 036 super( ENUMERATED, value ); 037 } 038 039 040 /** 041 * Static factory method, type-conversion operator. 042 */ 043 public static DEREnumerated valueOf( int integer ) 044 { 045 return new DEREnumerated( intToOctet( integer ) ); 046 } 047 048 049 /** 050 * Lazy accessor 051 * 052 * @return integer value 053 */ 054 public int intValue() 055 { 056 return octetToInt( value ); 057 } 058 059 060 private static int octetToInt( byte[] bytes ) 061 { 062 int result = 0; 063 064 for ( int ii = 0; ii < Math.min( 4, bytes.length ); ii++ ) 065 { 066 result += bytes[ii] * ( 16 ^ ii ); 067 } 068 return result; 069 } 070 071 072 private static byte[] intToOctet( int integer ) 073 { 074 byte[] result = new byte[4]; 075 076 for ( int ii = 0, shift = 24; ii < 4; ii++, shift -= 8 ) 077 { 078 result[ii] = ( byte ) ( 0xFF & ( integer >> shift ) ); 079 } 080 return result; 081 } 082 }