| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.shared.ldap.codec.controls.search.persistentSearch; |
| |
| |
| import org.apache.directory.shared.asn1.DecoderException; |
| import org.apache.directory.shared.asn1.ber.grammar.AbstractGrammar; |
| import org.apache.directory.shared.asn1.ber.grammar.Grammar; |
| import org.apache.directory.shared.asn1.ber.grammar.GrammarAction; |
| import org.apache.directory.shared.asn1.ber.grammar.GrammarTransition; |
| import org.apache.directory.shared.asn1.ber.tlv.BooleanDecoder; |
| import org.apache.directory.shared.asn1.ber.tlv.BooleanDecoderException; |
| import org.apache.directory.shared.asn1.ber.tlv.IntegerDecoder; |
| import org.apache.directory.shared.asn1.ber.tlv.IntegerDecoderException; |
| import org.apache.directory.shared.asn1.ber.tlv.UniversalTag; |
| import org.apache.directory.shared.asn1.ber.tlv.Value; |
| import org.apache.directory.shared.i18n.I18n; |
| import org.apache.directory.shared.ldap.model.message.controls.PersistentSearch; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * This class implements the PSearchControl. All the actions are declared in |
| * this class. As it is a singleton, these declaration are only done once. |
| * |
| * The decoded grammar is the following : |
| * |
| * PersistenceSearch ::= SEQUENCE { |
| * changeTypes INTEGER, -- an OR combinaison of 0, 1, 2 and 4 -- |
| * changeOnly BOOLEAN, |
| * returnECs BOOLEAN |
| * } |
| * |
| * The changeTypes field is the logical OR of one or more of these values: |
| * add (1), |
| * delete (2), |
| * modify (4), |
| * modDN (8). |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public final class PersistentSearchGrammar extends AbstractGrammar |
| { |
| /** The logger */ |
| static final Logger LOG = LoggerFactory.getLogger( PersistentSearchGrammar.class ); |
| |
| /** Speedup for logs */ |
| static final boolean IS_DEBUG = LOG.isDebugEnabled(); |
| |
| /** The instance of grammar. PSearchControlGrammar is a singleton */ |
| private static Grammar instance = new PersistentSearchGrammar(); |
| |
| |
| /** |
| * Creates a new PSearchControlGrammar object. |
| */ |
| private PersistentSearchGrammar() |
| { |
| setName( PersistentSearchGrammar.class.getName() ); |
| |
| // Create the transitions table |
| super.transitions = new GrammarTransition[ PersistentSearchStates.LAST_PSEARCH_STATE.ordinal()][256]; |
| |
| /** |
| * Transition from initial state to Psearch sequence |
| * PSearch ::= SEQUENCE OF { |
| * ... |
| * |
| * Initialize the persistence search object |
| */ |
| super.transitions[ PersistentSearchStates.START_STATE.ordinal()][UniversalTag.SEQUENCE.getValue()] = |
| new GrammarTransition( PersistentSearchStates.START_STATE, |
| PersistentSearchStates.PSEARCH_SEQUENCE_STATE, |
| UniversalTag.SEQUENCE.getValue(), null ); |
| |
| |
| /** |
| * Transition from Psearch sequence to Change types |
| * PSearch ::= SEQUENCE OF { |
| * changeTypes INTEGER, -- an OR combinaison of 0, 1, 2 and 4 -- |
| * ... |
| * |
| * Stores the change types value |
| */ |
| super.transitions[ PersistentSearchStates.PSEARCH_SEQUENCE_STATE.ordinal()][UniversalTag.INTEGER.getValue()] = |
| new GrammarTransition( PersistentSearchStates.PSEARCH_SEQUENCE_STATE, |
| PersistentSearchStates.CHANGE_TYPES_STATE, |
| UniversalTag.INTEGER.getValue(), |
| new GrammarAction<PersistentSearchContainer>( "Set PSearchControl changeTypes" ) |
| { |
| public void action( PersistentSearchContainer container ) throws DecoderException |
| { |
| Value value = container.getCurrentTLV().getValue(); |
| |
| try |
| { |
| // Check that the value is into the allowed interval |
| int changeTypes = IntegerDecoder.parse( value, |
| PersistentSearch.CHANGE_TYPES_MIN, |
| PersistentSearch.CHANGE_TYPES_MAX ); |
| |
| if ( IS_DEBUG ) |
| { |
| LOG.debug( "changeTypes = " + changeTypes ); |
| } |
| |
| container.getPersistentSearchDecorator().setChangeTypes( changeTypes ); |
| } |
| catch ( IntegerDecoderException e ) |
| { |
| String msg = I18n.err( I18n.ERR_04051 ); |
| LOG.error( msg, e ); |
| throw new DecoderException( msg ); |
| } |
| } |
| } ); |
| |
| /** |
| * Transition from Change types to Changes only |
| * PSearch ::= SEQUENCE OF { |
| * ... |
| * changeOnly BOOLEAN, |
| * ... |
| * |
| * Stores the change only flag |
| */ |
| super.transitions[ PersistentSearchStates.CHANGE_TYPES_STATE.ordinal()][UniversalTag.BOOLEAN.getValue()] = |
| new GrammarTransition( PersistentSearchStates.CHANGE_TYPES_STATE, |
| PersistentSearchStates.CHANGES_ONLY_STATE, UniversalTag.BOOLEAN.getValue(), |
| new GrammarAction<PersistentSearchContainer>( "Set PSearchControl changesOnly" ) |
| { |
| public void action( PersistentSearchContainer container ) throws DecoderException |
| { |
| Value value = container.getCurrentTLV().getValue(); |
| |
| try |
| { |
| boolean changesOnly = BooleanDecoder.parse( value ); |
| |
| if ( IS_DEBUG ) |
| { |
| LOG.debug( "changesOnly = " + changesOnly ); |
| } |
| |
| container.getPersistentSearchDecorator().setChangesOnly( changesOnly ); |
| } |
| catch ( BooleanDecoderException e ) |
| { |
| String msg = I18n.err( I18n.ERR_04052 ); |
| LOG.error( msg, e ); |
| throw new DecoderException( msg ); |
| } |
| } |
| } ); |
| |
| /** |
| * Transition from Change types to Changes only |
| * PSearch ::= SEQUENCE OF { |
| * ... |
| * returnECs BOOLEAN |
| * } |
| * |
| * Stores the return ECs flag |
| */ |
| super.transitions[ PersistentSearchStates.CHANGES_ONLY_STATE.ordinal()][UniversalTag.BOOLEAN.getValue()] = |
| new GrammarTransition( PersistentSearchStates.CHANGES_ONLY_STATE, |
| PersistentSearchStates.RETURN_ECS_STATE, UniversalTag.BOOLEAN.getValue(), |
| new GrammarAction<PersistentSearchContainer>( "Set PSearchControl returnECs" ) |
| { |
| public void action( PersistentSearchContainer container ) throws DecoderException |
| { |
| Value value = container.getCurrentTLV().getValue(); |
| |
| try |
| { |
| boolean returnECs = BooleanDecoder.parse( value ); |
| |
| if ( IS_DEBUG ) |
| { |
| LOG.debug( "returnECs = " + returnECs ); |
| } |
| |
| container.getPersistentSearchDecorator().setReturnECs( returnECs ); |
| |
| // We can have an END transition |
| container.setGrammarEndAllowed( true ); |
| } |
| catch ( BooleanDecoderException e ) |
| { |
| String msg = I18n.err( I18n.ERR_04053 ); |
| LOG.error( msg, e ); |
| throw new DecoderException( msg ); |
| } |
| } |
| } ); |
| } |
| |
| |
| /** |
| * This class is a singleton. |
| * |
| * @return An instance on this grammar |
| */ |
| public static Grammar getInstance() |
| { |
| return instance; |
| } |
| } |