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.actions;
021    
022    
023    import org.apache.directory.shared.asn1.ber.IAsn1Container;
024    import org.apache.directory.shared.asn1.ber.grammar.GrammarAction;
025    import org.apache.directory.shared.asn1.ber.tlv.TLV;
026    import org.apache.directory.shared.asn1.codec.DecoderException;
027    import org.apache.directory.shared.ldap.codec.AttributeValueAssertion;
028    import org.apache.directory.shared.ldap.codec.LdapMessageContainer;
029    import org.apache.directory.shared.ldap.codec.search.AttributeValueAssertionFilter;
030    import org.apache.directory.shared.ldap.codec.search.SearchRequestCodec;
031    import org.apache.directory.shared.ldap.entry.BinaryValue;
032    import org.apache.directory.shared.ldap.entry.StringValue;
033    import org.apache.directory.shared.ldap.entry.Value;
034    import org.apache.directory.shared.ldap.util.StringTools;
035    import org.slf4j.Logger;
036    import org.slf4j.LoggerFactory;
037    
038    
039    /**
040     * The action used to initialize the Assertion Value filter
041     * 
042     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
043     * @version $Rev$, $Date$, 
044     */
045    public class InitAssertionValueFilterAction extends GrammarAction
046    {
047        /** The logger */
048        private static final Logger log = LoggerFactory.getLogger( InitAssertionValueFilterAction.class );
049    
050        /** Speedup for logs */
051        private static final boolean IS_DEBUG = log.isDebugEnabled();
052    
053        public InitAssertionValueFilterAction()
054        {
055            super( "Initialize Assertion Value filter" );
056        }
057    
058        /**
059         * The initialization action
060         */
061        public void action( IAsn1Container container ) throws DecoderException
062        {
063            LdapMessageContainer ldapMessageContainer = ( LdapMessageContainer ) container;
064            SearchRequestCodec searchRequest = ldapMessageContainer.getSearchRequest();
065    
066            TLV tlv = ldapMessageContainer.getCurrentTLV();
067    
068            // The value can be null.
069            Value<?> assertionValue = null;
070    
071            if ( tlv.getLength() != 0 )
072            {
073                assertionValue = new BinaryValue( tlv.getValue().getData() );
074            }
075            else
076            {
077                assertionValue = new BinaryValue( StringTools.EMPTY_BYTES );
078            }
079    
080            AttributeValueAssertionFilter terminalFilter = ( AttributeValueAssertionFilter ) searchRequest
081                .getTerminalFilter();
082            AttributeValueAssertion assertion = terminalFilter.getAssertion();
083    
084            if ( ldapMessageContainer.isBinary( assertion.getAttributeDesc() ) )
085            {
086                if ( tlv.getLength() != 0 )
087                {
088                    assertionValue = new BinaryValue( tlv.getValue().getData() );
089                }
090                else
091                {
092                    assertionValue = new BinaryValue( StringTools.EMPTY_BYTES );
093                }
094                
095                assertion.setAssertionValue( assertionValue );
096            }
097            else
098            {
099                if ( tlv.getLength() != 0 )
100                {
101                    assertionValue = new StringValue( StringTools.utf8ToString( tlv.getValue().getData() ) );
102                }
103                else
104                {
105                    assertionValue = new StringValue( "" );
106                }
107                
108                assertion.setAssertionValue(assertionValue );
109            }
110    
111            // We now have to get back to the nearest filter which is
112            // not terminal.
113            searchRequest.unstackFilters( container );
114    
115            if ( IS_DEBUG )
116            {
117                log.debug( "Initialize Assertion Value filter" );
118            }
119        }
120    }