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.shared.ldap.codec.actions.searchRequest; 021 022 023import org.apache.directory.shared.asn1.DecoderException; 024import org.apache.directory.shared.asn1.ber.grammar.GrammarAction; 025import org.apache.directory.shared.asn1.ber.tlv.IntegerDecoder; 026import org.apache.directory.shared.asn1.ber.tlv.IntegerDecoderException; 027import org.apache.directory.shared.asn1.ber.tlv.TLV; 028import org.apache.directory.shared.asn1.ber.tlv.Value; 029import org.apache.directory.shared.i18n.I18n; 030import org.apache.directory.shared.ldap.codec.api.LdapConstants; 031import org.apache.directory.shared.ldap.codec.api.LdapMessageContainer; 032import org.apache.directory.shared.ldap.codec.decorators.SearchRequestDecorator; 033import org.apache.directory.shared.ldap.model.message.AliasDerefMode; 034import org.apache.directory.shared.ldap.model.message.SearchRequest; 035import org.slf4j.Logger; 036import org.slf4j.LoggerFactory; 037 038 039/** 040 * The action used to store the SearchRequest derefAlias flag 041 * <pre> 042 * SearchRequest ::= [APPLICATION 3] SEQUENCE { 043 * ... 044 * derefAliases ENUMERATED { 045 * neverDerefAliases (0), 046 * derefInSearching (1), 047 * derefFindingBaseObj (2), 048 * derefAlways (3) }, 049 * ... 050 * </pre> 051 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 052 */ 053public class StoreSearchRequestDerefAlias extends GrammarAction<LdapMessageContainer<SearchRequestDecorator>> 054{ 055 /** The logger */ 056 private static final Logger LOG = LoggerFactory.getLogger( StoreSearchRequestDerefAlias.class ); 057 058 /** Speedup for logs */ 059 private static final boolean IS_DEBUG = LOG.isDebugEnabled(); 060 061 /** 062 * Instantiates a new action. 063 */ 064 public StoreSearchRequestDerefAlias() 065 { 066 super( "Store SearchRequest derefAlias flag" ); 067 } 068 069 070 /** 071 * {@inheritDoc} 072 */ 073 public void action( LdapMessageContainer<SearchRequestDecorator> container ) throws DecoderException 074 { 075 SearchRequest searchRequest = container.getMessage().getDecorated(); 076 077 TLV tlv = container.getCurrentTLV(); 078 079 // We have to check that this is a correct derefAliases 080 Value value = tlv.getValue(); 081 int derefAliases = 0; 082 083 try 084 { 085 derefAliases = IntegerDecoder.parse(value, LdapConstants.NEVER_DEREF_ALIASES, 086 LdapConstants.DEREF_ALWAYS); 087 } 088 catch ( IntegerDecoderException ide ) 089 { 090 String msg = I18n.err( I18n.ERR_04102, value.toString() ); 091 LOG.error( msg ); 092 throw new DecoderException( msg ); 093 } 094 095 searchRequest.setDerefAliases( AliasDerefMode.getDerefMode( derefAliases ) ); 096 097 if ( IS_DEBUG ) 098 { 099 switch ( derefAliases ) 100 { 101 case LdapConstants.NEVER_DEREF_ALIASES: 102 LOG.debug( "Handling object strategy : NEVER_DEREF_ALIASES" ); 103 break; 104 105 case LdapConstants.DEREF_IN_SEARCHING: 106 LOG.debug( "Handling object strategy : DEREF_IN_SEARCHING" ); 107 break; 108 109 case LdapConstants.DEREF_FINDING_BASE_OBJ: 110 LOG.debug( "Handling object strategy : DEREF_FINDING_BASE_OBJ" ); 111 break; 112 113 case LdapConstants.DEREF_ALWAYS: 114 LOG.debug( "Handling object strategy : DEREF_ALWAYS" ); 115 break; 116 } 117 } 118 } 119}