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    import java.io.ByteArrayOutputStream;
027    import java.io.IOException;
028    import java.util.Enumeration;
029    import java.util.Vector;
030    
031    
032    public class DERSequence implements DEREncodable
033    {
034        private Vector<DEREncodable> v = new Vector<DEREncodable>();
035    
036    
037        public void add( DEREncodable obj )
038        {
039            v.addElement( obj );
040        }
041    
042    
043        public Enumeration<DEREncodable> getObjects()
044        {
045            return v.elements();
046        }
047    
048    
049        public DEREncodable get( int i )
050        {
051            return ( DEREncodable ) v.elementAt( i );
052        }
053    
054    
055        public int size()
056        {
057            return v.size();
058        }
059    
060    
061        /**
062         * As DER requires the constructed, definite-length model to be used for
063         * structured types, this varies slightly from the ASN.1 descriptions given.
064         * Rather than just outputing SEQUENCE, we also have to specify CONSTRUCTED,
065         * and the objects length.
066         */
067        public void encode( ASN1OutputStream out ) throws IOException
068        {
069            ByteArrayOutputStream baos = new ByteArrayOutputStream();
070            ASN1OutputStream aos = new ASN1OutputStream( baos );
071    
072            Enumeration<DEREncodable> e = getObjects();
073    
074            while ( e.hasMoreElements() )
075            {
076                aos.writeObject( e.nextElement() );
077            }
078    
079            aos.close();
080    
081            byte[] bytes = baos.toByteArray();
082    
083            out.writeEncoded( DERObject.SEQUENCE | DERObject.CONSTRUCTED, bytes );
084        }
085    }