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;
021    
022    import org.apache.directory.shared.ldap.message.spi.BinaryAttributeDetector;
023    import org.apache.directory.shared.ldap.message.spi.Provider;
024    import org.apache.directory.shared.ldap.message.spi.ProviderDecoder;
025    import org.apache.directory.shared.ldap.message.spi.ProviderEncoder;
026    import org.apache.directory.shared.ldap.message.spi.ProviderException;
027    
028    
029    /**
030     * The specific BER provider for LDAP.
031     * 
032     * @author <a href="mailto:dev@directory.apache.org"> Apache Directory Project</a>
033     *         $Rev: 903719 $
034     */
035    public class LdapProvider extends Provider
036    {
037        /**
038         * Creates an instance of a LDAP BER Provider.
039         */
040        private LdapProvider()
041        {
042            super( "LDAP LDAP BER Provider", "Apache Directory Project" );
043        }
044    
045        /** the singleton LdapProvider instance */
046        private static LdapProvider singleton;
047    
048    
049        /**
050         * Gets a handle on the singleton LdapProvider. Only one instance should
051         * have to be instantiated for the entire jvm.
052         * 
053         * @return the singleton SnaccProvider instance
054         */
055        public static synchronized Provider getProvider()
056        {
057            if ( singleton == null )
058            {
059                singleton = new LdapProvider();
060            }
061    
062            return singleton;
063        }
064    
065    
066        /**
067         * Gets the encoder associated with this provider.
068         * 
069         * @return the provider's encoder.
070         * @throws org.apache.directory.shared.ldap.message.spi.ProviderException
071         *             if the provider or its encoder cannot be found
072         */
073        public ProviderEncoder getEncoder() throws ProviderException
074        {
075            return new LdapEncoder( this );
076        }
077    
078    
079        /**
080         * Gets the decoder associated with this provider.
081         * 
082         * @return the provider's decoder.
083         * @throws org.apache.directory.shared.ldap.message.spi.ProviderException
084         *             if the provider or its decoder cannot be found
085         */
086        public ProviderDecoder getDecoder( BinaryAttributeDetector binaryAttributeDetector, int maxPDUSize ) throws ProviderException
087        {
088            return new LdapDecoder( this, binaryAttributeDetector, maxPDUSize );
089        }
090    }