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 */
020package org.apache.directory.api.ldap.codec.actions.searchRequest.filter;
021
022
023import org.apache.directory.api.asn1.DecoderException;
024import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
025import org.apache.directory.api.asn1.ber.tlv.TLV;
026import org.apache.directory.api.ldap.codec.AttributeValueAssertion;
027import org.apache.directory.api.ldap.codec.api.LdapMessageContainer;
028import org.apache.directory.api.ldap.codec.decorators.SearchRequestDecorator;
029import org.apache.directory.api.ldap.codec.search.AttributeValueAssertionFilter;
030import org.apache.directory.api.ldap.model.entry.BinaryValue;
031import org.apache.directory.api.ldap.model.entry.StringValue;
032import org.apache.directory.api.ldap.model.entry.Value;
033import org.apache.directory.api.util.StringConstants;
034import org.apache.directory.api.util.Strings;
035import org.slf4j.Logger;
036import 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 */
044public class InitAssertionValueFilter extends GrammarAction<LdapMessageContainer<SearchRequestDecorator>>
045{
046    /** The logger */
047    private static final Logger LOG = LoggerFactory.getLogger( InitAssertionValueFilter.class );
048
049    /** Speedup for logs */
050    private static final boolean IS_DEBUG = LOG.isDebugEnabled();
051
052
053    /**
054     * Instantiates a new init assertion value filter action.
055     */
056    public InitAssertionValueFilter()
057    {
058        super( "Initialize Assertion Value filter" );
059    }
060
061
062    /**
063     * {@inheritDoc}
064     */
065    public void action( LdapMessageContainer<SearchRequestDecorator> container ) throws DecoderException
066    {
067        SearchRequestDecorator searchRequestDecorator = container.getMessage();
068
069        TLV tlv = container.getCurrentTLV();
070
071        // The value can be null.
072        Value<?> assertionValue = null;
073
074        if ( tlv.getLength() != 0 )
075        {
076            assertionValue = new BinaryValue( tlv.getValue().getData() );
077        }
078        else
079        {
080            assertionValue = new BinaryValue( StringConstants.EMPTY_BYTES );
081        }
082
083        AttributeValueAssertionFilter terminalFilter = ( AttributeValueAssertionFilter )
084            searchRequestDecorator.getTerminalFilter();
085        AttributeValueAssertion assertion = terminalFilter.getAssertion();
086
087        if ( container.isBinary( assertion.getAttributeDesc() ) )
088        {
089            if ( tlv.getLength() != 0 )
090            {
091                assertionValue = new BinaryValue( tlv.getValue().getData() );
092            }
093            else
094            {
095                assertionValue = new BinaryValue( StringConstants.EMPTY_BYTES );
096            }
097
098            assertion.setAssertionValue( assertionValue );
099        }
100        else
101        {
102            if ( tlv.getLength() != 0 )
103            {
104                assertionValue = new StringValue( Strings.utf8ToString( tlv.getValue().getData() ) );
105            }
106            else
107            {
108                assertionValue = new StringValue( "" );
109            }
110
111            assertion.setAssertionValue( assertionValue );
112        }
113
114        // We now have to get back to the nearest filter which is
115        // not terminal.
116        searchRequestDecorator.unstackFilters( container );
117
118        if ( IS_DEBUG )
119        {
120            LOG.debug( "Initialize Assertion Value filter" );
121        }
122    }
123}