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.api.LdapMessageContainer; 027import org.apache.directory.api.ldap.codec.decorators.SearchRequestDecorator; 028import org.apache.directory.api.ldap.codec.search.PresentFilter; 029import org.apache.directory.api.util.Strings; 030 031import org.slf4j.Logger; 032import org.slf4j.LoggerFactory; 033 034 035/** 036 * The action used to initialize the Present filter 037 * 038 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 039 */ 040public class InitPresentFilter extends GrammarAction<LdapMessageContainer<SearchRequestDecorator>> 041{ 042 /** The logger */ 043 private static final Logger LOG = LoggerFactory.getLogger( InitPresentFilter.class ); 044 045 /** Speedup for logs */ 046 private static final boolean IS_DEBUG = LOG.isDebugEnabled(); 047 048 049 /** 050 * Instantiates a new init present filter action. 051 */ 052 public InitPresentFilter() 053 { 054 super( "Init present filter Value" ); 055 } 056 057 058 /** 059 * {@inheritDoc} 060 */ 061 public void action( LdapMessageContainer<SearchRequestDecorator> container ) throws DecoderException 062 { 063 SearchRequestDecorator searchRequestDecorator = container.getMessage(); 064 065 TLV tlv = container.getCurrentTLV(); 066 067 // We can allocate the Attribute Value Assertion 068 PresentFilter presentFilter = new PresentFilter( container.getTlvId() ); 069 070 // add the filter to the request filter 071 searchRequestDecorator.addCurrentFilter( presentFilter ); 072 searchRequestDecorator.setTerminalFilter( presentFilter ); 073 074 String value = Strings.utf8ToString( tlv.getValue().getData() ); 075 076 if ( Strings.isEmpty( value ) ) 077 { 078 presentFilter.setAttributeDescription( "" ); 079 } 080 else 081 { 082 // Store the value. 083 String type = Strings.utf8ToString( tlv.getValue().getData() ); 084 presentFilter.setAttributeDescription( type ); 085 } 086 087 // We now have to get back to the nearest filter which is 088 // not terminal. 089 searchRequestDecorator.unstackFilters( container ); 090 091 if ( IS_DEBUG ) 092 { 093 LOG.debug( "Initialize Present filter" ); 094 } 095 } 096}