| /* |
| * 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.extras.extended.ads_impl; |
| |
| |
| import org.apache.directory.shared.asn1.ber.Asn1Container; |
| 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.UniversalTag; |
| import org.apache.directory.shared.asn1.ber.tlv.Value; |
| import org.apache.directory.shared.asn1.DecoderException; |
| import org.apache.directory.shared.asn1.ber.tlv.IntegerDecoder; |
| import org.apache.directory.shared.asn1.ber.tlv.IntegerDecoderException; |
| import org.apache.directory.shared.i18n.I18n; |
| import org.apache.directory.shared.util.Strings; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * This class implements the Cancel operation. All the actions are declared |
| * in this class. As it is a singleton, these declaration are only done once. |
| * The grammar is : |
| * |
| * <pre> |
| * cancelRequestValue ::= SEQUENCE { |
| * cancelId MessageID |
| * -- MessageID is as defined in [RFC2251] |
| * } |
| * </pre> |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public final class CancelGrammar extends AbstractGrammar<CancelContainer> |
| { |
| /** The logger */ |
| static final Logger LOG = LoggerFactory.getLogger( CancelGrammar.class ); |
| |
| /** Speedup for logs */ |
| static final boolean IS_DEBUG = LOG.isDebugEnabled(); |
| |
| /** The instance of grammar. CancelGrammar is a singleton */ |
| private static Grammar<CancelContainer> instance = new CancelGrammar(); |
| |
| |
| /** |
| * Creates a new GracefulDisconnectGrammar object. |
| */ |
| @SuppressWarnings({ "unchecked", "rawtypes" }) |
| private CancelGrammar() |
| { |
| setName( CancelGrammar.class.getName() ); |
| |
| // Create the transitions table |
| super.transitions = new GrammarTransition[CancelStatesEnum.LAST_CANCEL_STATE.ordinal()][256]; |
| |
| /** |
| * Transition from init state to cancel sequence |
| * cancelRequestValue ::= SEQUENCE { |
| * ... |
| * |
| * Creates the Cancel object |
| */ |
| super.transitions[CancelStatesEnum.START_STATE.ordinal()][UniversalTag.SEQUENCE.getValue()] = |
| new GrammarTransition<CancelContainer>( CancelStatesEnum.START_STATE, |
| CancelStatesEnum.CANCEL_SEQUENCE_STATE, |
| UniversalTag.SEQUENCE.getValue(), |
| new GrammarAction( "Init Cancel" ) |
| { |
| public void action( Asn1Container container ) |
| { |
| CancelContainer cancelContainer = ( CancelContainer ) container; |
| Cancel cancel = new Cancel(); |
| cancelContainer.setCancel( cancel ); |
| } |
| } ); |
| |
| /** |
| * Transition from cancel SEQ to cancelId |
| * |
| * cancelRequestValue ::= SEQUENCE { |
| * cancelId MessageID |
| * } |
| * |
| * Set the cancelId value into the Cancel object. |
| */ |
| super.transitions[CancelStatesEnum.CANCEL_SEQUENCE_STATE.ordinal()][UniversalTag.INTEGER.getValue()] = |
| new GrammarTransition<CancelContainer>( CancelStatesEnum.CANCEL_SEQUENCE_STATE, |
| CancelStatesEnum.CANCEL_ID_STATE, |
| UniversalTag.INTEGER.getValue(), |
| new GrammarAction( "Stores CancelId" ) |
| { |
| public void action( Asn1Container container ) throws DecoderException |
| { |
| CancelContainer cancelContainer = ( CancelContainer ) container; |
| Value value = cancelContainer.getCurrentTLV().getValue(); |
| |
| try |
| { |
| int cancelId = IntegerDecoder.parse( value, 0, Integer.MAX_VALUE ); |
| |
| if ( IS_DEBUG ) |
| { |
| LOG.debug( "CancelId = " + cancelId ); |
| } |
| |
| cancelContainer.getCancel().setCancelId( cancelId ); |
| cancelContainer.setGrammarEndAllowed( true ); |
| } |
| catch ( IntegerDecoderException e ) |
| { |
| String msg = I18n.err( I18n.ERR_04031, Strings.dumpBytes(value.getData()) ); |
| LOG.error( msg ); |
| throw new DecoderException( msg ); |
| } |
| } |
| }); |
| } |
| |
| |
| /** |
| * This class is a singleton. |
| * |
| * @return An instance on this grammar |
| */ |
| public static Grammar<CancelContainer> getInstance() |
| { |
| return instance; |
| } |
| } |