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    }