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.ber.grammar.GrammarAction; 024import org.apache.directory.api.asn1.ber.tlv.TLV; 025import org.apache.directory.api.i18n.I18n; 026import org.apache.directory.api.ldap.codec.AttributeValueAssertion; 027import org.apache.directory.api.ldap.codec.api.LdapMessageContainer; 028import org.apache.directory.api.ldap.codec.search.AttributeValueAssertionFilter; 029import org.apache.directory.api.ldap.model.message.SearchRequest; 030import org.apache.directory.api.util.Strings; 031import org.slf4j.Logger; 032import org.slf4j.LoggerFactory; 033 034 035/** 036 * The action used to initialize the Assertion Value filter 037 * 038 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 039 */ 040public class InitAssertionValueFilter extends GrammarAction<LdapMessageContainer<SearchRequest>> 041{ 042 /** The logger */ 043 private static final Logger LOG = LoggerFactory.getLogger( InitAssertionValueFilter.class ); 044 045 /** 046 * Instantiates a new init assertion value filter action. 047 */ 048 public InitAssertionValueFilter() 049 { 050 super( "Initialize Assertion Value filter" ); 051 } 052 053 054 /** 055 * {@inheritDoc} 056 */ 057 public void action( LdapMessageContainer<SearchRequest> container ) 058 { 059 TLV tlv = container.getCurrentTLV(); 060 061 // The value can be null. 062 byte[] assertion = tlv.getValue().getData(); 063 064 AttributeValueAssertionFilter terminalFilter = ( AttributeValueAssertionFilter ) 065 container.getTerminalFilter(); 066 AttributeValueAssertion attributeValueAssertion = terminalFilter.getAssertion(); 067 068 if ( assertion == null ) 069 { 070 attributeValueAssertion.setAssertion( Strings.EMPTY_BYTES ); 071 } 072 else 073 { 074 attributeValueAssertion.setAssertion( assertion ); 075 } 076 077 // We now have to get back to the nearest filter which is 078 // not terminal. 079 container.unstackFilters(); 080 081 if ( LOG.isDebugEnabled() ) 082 { 083 LOG.debug( I18n.msg( I18n.MSG_05144_INITIALIZE_ASSERTION_FILTER ) ); 084 } 085 } 086}