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     */
020    package org.apache.directory.shared.ldap.codec.controls;
021    
022    
023    import java.nio.ByteBuffer;
024    
025    import org.apache.directory.shared.asn1.ber.tlv.Value;
026    import org.apache.directory.shared.asn1.codec.EncoderException;
027    import org.apache.directory.shared.i18n.I18n;
028    import org.apache.directory.shared.ldap.util.StringTools;
029    
030    
031    /**
032     * A genericcodec Control.
033     * 
034     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
035     * @version $Rev: 764131 $, $Date: 2009-04-11 03:03:00 +0200 (Sat, 11 Apr 2009) $, 
036     */
037    public class ControlImpl extends AbstractControl 
038    {
039        /**
040         * Default constructor.
041         */
042        public ControlImpl( String oid )
043        {
044            super( oid );
045            
046            decoder = null;
047        }
048    
049        
050        /**
051         * Set the encoded control value
052         * 
053         * @param encodedValue The encoded control value to store
054         */
055        public void setValue( byte[] value )
056        {
057            if ( value != null )
058            {
059                this.value = new byte[ value.length ];
060                System.arraycopy( value, 0, this.value, 0, value.length );
061            } 
062            else 
063            {
064                this.value = null;
065            }
066        }
067    
068    
069        /**
070         * Get the raw control encoded bytes
071         * 
072         * @return the encoded bytes for the control
073         */
074        public byte[] getValue()
075        {
076            if ( value == null )
077            {
078                return StringTools.EMPTY_BYTES;
079            }
080    
081            final byte[] copy = new byte[ value.length ];
082            System.arraycopy( value, 0, copy, 0, value.length );
083            return copy;
084        }
085    
086    
087        /**
088         * {@inheritDoc}
089         */
090        @Override
091        public int computeLength()
092        {
093            if ( value != null )
094            {
095                return super.computeLength( value.length );
096            }
097            else
098            {
099                return super.computeLength( 0 );
100            }
101        }
102        
103        
104        /**
105         * {@inheritDoc}
106         */
107        public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException
108        {
109            if ( buffer == null )
110            {
111                throw new EncoderException( I18n.err( I18n.ERR_04023 ) );
112            }
113    
114            // Encode the Control envelop
115            super.encode( buffer );
116            
117            // If we have a value, encode it
118            if ( value != null )
119            {
120                Value.encode( buffer, value );
121            }
122    
123            return buffer;
124        }
125    }