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 * https://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.request.search.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.i18n.I18n; 027import org.apache.directory.api.ldap.codec.api.LdapMessageContainer; 028import org.apache.directory.api.ldap.codec.search.PresentFilter; 029import org.apache.directory.api.ldap.model.message.SearchRequest; 030import org.apache.directory.api.util.Strings; 031 032import org.slf4j.Logger; 033import org.slf4j.LoggerFactory; 034 035 036/** 037 * The action used to initialize the Present filter 038 * 039 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 040 */ 041public class InitPresentFilter extends GrammarAction<LdapMessageContainer<SearchRequest>> 042{ 043 /** The logger */ 044 private static final Logger LOG = LoggerFactory.getLogger( InitPresentFilter.class ); 045 046 /** 047 * Instantiates a new init present filter action. 048 */ 049 public InitPresentFilter() 050 { 051 super( "Init present filter Value" ); 052 } 053 054 055 /** 056 * {@inheritDoc} 057 */ 058 public void action( LdapMessageContainer<SearchRequest> container ) throws DecoderException 059 { 060 TLV tlv = container.getCurrentTLV(); 061 062 // We can allocate the Attribute Value Assertion 063 PresentFilter presentFilter = new PresentFilter( container.getTlvId() ); 064 065 // add the filter to the request filter 066 container.addCurrentFilter( presentFilter ); 067 container.setTerminalFilter( presentFilter ); 068 069 String value = Strings.utf8ToString( tlv.getValue().getData() ); 070 071 if ( Strings.isEmpty( value ) ) 072 { 073 presentFilter.setAttributeDescription( "" ); 074 } 075 else 076 { 077 // Store the value. 078 String type = Strings.utf8ToString( tlv.getValue().getData() ); 079 presentFilter.setAttributeDescription( type ); 080 } 081 082 // We now have to get back to the nearest filter which is 083 // not terminal. 084 container.unstackFilters(); 085 086 if ( LOG.isDebugEnabled() ) 087 { 088 LOG.debug( I18n.msg( I18n.MSG_05151_INITIALIZE_PRESENT_FILTER ) ); 089 } 090 } 091}