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.Strings;
034import org.slf4j.Logger;
035import org.slf4j.LoggerFactory;
036
037
038/**
039 * The action used to initialize the Assertion Value filter
040 * 
041 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
042 */
043public class InitAssertionValueFilter extends GrammarAction<LdapMessageContainer<SearchRequestDecorator>>
044{
045    /** The logger */
046    private static final Logger LOG = LoggerFactory.getLogger( InitAssertionValueFilter.class );
047
048    /** Speedup for logs */
049    private static final boolean IS_DEBUG = LOG.isDebugEnabled();
050
051
052    /**
053     * Instantiates a new init assertion value filter action.
054     */
055    public InitAssertionValueFilter()
056    {
057        super( "Initialize Assertion Value filter" );
058    }
059
060
061    /**
062     * {@inheritDoc}
063     */
064    public void action( LdapMessageContainer<SearchRequestDecorator> container ) throws DecoderException
065    {
066        SearchRequestDecorator searchRequestDecorator = container.getMessage();
067
068        TLV tlv = container.getCurrentTLV();
069
070        // The value can be null.
071        Value<?> assertionValue;
072
073        AttributeValueAssertionFilter terminalFilter = ( AttributeValueAssertionFilter )
074            searchRequestDecorator.getTerminalFilter();
075        AttributeValueAssertion assertion = terminalFilter.getAssertion();
076
077        if ( container.isBinary( assertion.getAttributeDesc() ) )
078        {
079            if ( tlv.getLength() != 0 )
080            {
081                assertionValue = new BinaryValue( tlv.getValue().getData() );
082            }
083            else
084            {
085                assertionValue = new BinaryValue( Strings.EMPTY_BYTES );
086            }
087
088            assertion.setAssertionValue( assertionValue );
089        }
090        else
091        {
092            if ( tlv.getLength() != 0 )
093            {
094                assertionValue = new StringValue( Strings.utf8ToString( tlv.getValue().getData() ) );
095            }
096            else
097            {
098                assertionValue = new StringValue( "" );
099            }
100
101            assertion.setAssertionValue( assertionValue );
102        }
103
104        // We now have to get back to the nearest filter which is
105        // not terminal.
106        searchRequestDecorator.unstackFilters( container );
107
108        if ( IS_DEBUG )
109        {
110            LOG.debug( "Initialize Assertion Value filter" );
111        }
112    }
113}