| /* |
| * 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.api.ldap.codec.controls.search.persistentSearch; |
| |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.directory.api.asn1.Asn1Object; |
| import org.apache.directory.api.asn1.DecoderException; |
| import org.apache.directory.api.asn1.EncoderException; |
| import org.apache.directory.api.asn1.ber.Asn1Decoder; |
| import org.apache.directory.api.asn1.ber.tlv.BerValue; |
| import org.apache.directory.api.asn1.ber.tlv.TLV; |
| import org.apache.directory.api.asn1.ber.tlv.UniversalTag; |
| import org.apache.directory.api.i18n.I18n; |
| import org.apache.directory.api.ldap.codec.api.ControlDecorator; |
| import org.apache.directory.api.ldap.codec.api.LdapApiService; |
| import org.apache.directory.api.ldap.model.message.controls.ChangeType; |
| import org.apache.directory.api.ldap.model.message.controls.PersistentSearch; |
| import org.apache.directory.api.ldap.model.message.controls.PersistentSearchImpl; |
| |
| |
| /** |
| * A persistence search object |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class PersistentSearchDecorator extends ControlDecorator<PersistentSearch> implements PersistentSearch |
| { |
| /** A temporary storage for a psearch length */ |
| private int psearchSeqLength; |
| |
| /** An instance of this decoder */ |
| private static final Asn1Decoder DECODER = new Asn1Decoder(); |
| |
| |
| /** |
| * Default constructor creates a PersistentSearch Control automatically |
| * wrapped in a decorator object inside this container. |
| */ |
| public PersistentSearchDecorator( LdapApiService codec ) |
| { |
| this( codec, new PersistentSearchImpl() ); |
| } |
| |
| |
| /** |
| * Creates a PersistentSearch Control wrapping a supplied PersistentSearch |
| * Control. |
| * |
| * @param control The PersistentSearch Control to wrap. |
| */ |
| public PersistentSearchDecorator( LdapApiService codec, PersistentSearch control ) |
| { |
| super( codec, control ); |
| } |
| |
| |
| /** |
| * Compute the PagedSearchControl length, which is the sum |
| * of the control length and the value length. |
| * |
| * <pre> |
| * PersistentSearchDecorator value length : |
| * |
| * 0x30 L1 |
| * | |
| * +--> 0x02 0x0(1-4) [0..2^31-1] (changeTypes) |
| * +--> 0x01 0x01 [0x00 | 0xFF] (changeOnly) |
| * +--> 0x01 0x01 [0x00 | 0xFF] (returnRCs) |
| * </pre> |
| */ |
| public int computeLength() |
| { |
| int changeTypesLength = 1 + 1 + BerValue.getNbBytes( getChangeTypes() ); |
| int changesOnlyLength = 1 + 1 + 1; |
| int returnRCsLength = 1 + 1 + 1; |
| |
| psearchSeqLength = changeTypesLength + changesOnlyLength + returnRCsLength; |
| int valueLength = 1 + TLV.getNbBytes( psearchSeqLength ) + psearchSeqLength; |
| |
| return valueLength; |
| } |
| |
| |
| /** |
| * Encodes the persistent search control. |
| * |
| * @param buffer The encoded sink |
| * @return A ByteBuffer that contains the encoded PDU |
| * @throws EncoderException If anything goes wrong. |
| */ |
| public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException |
| { |
| if ( buffer == null ) |
| { |
| throw new EncoderException( I18n.err( I18n.ERR_04023 ) ); |
| } |
| |
| // Now encode the PagedSearch specific part |
| buffer.put( UniversalTag.SEQUENCE.getValue() ); |
| buffer.put( TLV.getBytes( psearchSeqLength ) ); |
| |
| BerValue.encode( buffer, getChangeTypes() ); |
| BerValue.encode( buffer, isChangesOnly() ); |
| BerValue.encode( buffer, isReturnECs() ); |
| |
| return buffer; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public byte[] getValue() |
| { |
| if ( value == null ) |
| { |
| try |
| { |
| computeLength(); |
| ByteBuffer buffer = ByteBuffer.allocate( valueLength ); |
| |
| // Now encode the PagedSearch specific part |
| buffer.put( UniversalTag.SEQUENCE.getValue() ); |
| buffer.put( TLV.getBytes( psearchSeqLength ) ); |
| |
| BerValue.encode( buffer, getChangeTypes() ); |
| BerValue.encode( buffer, isChangesOnly() ); |
| BerValue.encode( buffer, isReturnECs() ); |
| |
| value = buffer.array(); |
| } |
| catch ( Exception e ) |
| { |
| return null; |
| } |
| } |
| |
| return value; |
| } |
| |
| |
| private PersistentSearch getPersistentSearch() |
| { |
| return ( PersistentSearch ) getDecorated(); |
| } |
| |
| |
| public void setChangesOnly( boolean changesOnly ) |
| { |
| getPersistentSearch().setChangesOnly( changesOnly ); |
| } |
| |
| |
| public boolean isChangesOnly() |
| { |
| return getPersistentSearch().isChangesOnly(); |
| } |
| |
| |
| public void setReturnECs( boolean returnECs ) |
| { |
| getPersistentSearch().setReturnECs( returnECs ); |
| } |
| |
| |
| public boolean isReturnECs() |
| { |
| return getPersistentSearch().isReturnECs(); |
| } |
| |
| |
| public void setChangeTypes( int changeTypes ) |
| { |
| getPersistentSearch().setChangeTypes( changeTypes ); |
| } |
| |
| |
| public int getChangeTypes() |
| { |
| return getPersistentSearch().getChangeTypes(); |
| } |
| |
| |
| public boolean isNotificationEnabled( ChangeType changeType ) |
| { |
| return getPersistentSearch().isNotificationEnabled( changeType ); |
| } |
| |
| |
| public void enableNotification( ChangeType changeType ) |
| { |
| getPersistentSearch().enableNotification( changeType ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Asn1Object decode( byte[] controlBytes ) throws DecoderException |
| { |
| ByteBuffer bb = ByteBuffer.wrap( controlBytes ); |
| PersistentSearchContainer container = new PersistentSearchContainer( getCodecService(), this ); |
| DECODER.decode( bb, container ); |
| return this; |
| } |
| } |