/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2009 Sun Microsystems, Inc.
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* Portions Copyright 2011-2015 ForgeRock AS
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*/
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package org.opends.server.replication.protocol;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.zip.DataFormatException;
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import org.forgerock.opendj.io.ASN1;
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import org.forgerock.opendj.ldap.DecodeException;
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import org.forgerock.opendj.io.ASN1Reader;
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import org.forgerock.opendj.io.ASN1Writer;
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import org.opends.server.protocols.internal.InternalClientConnection;
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import org.opends.server.protocols.ldap.LDAPAttribute;
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import org.opends.server.replication.common.AssuredMode;
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import org.opends.server.replication.common.CSN;
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import org.opends.server.types.*;
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import org.forgerock.opendj.ldap.ByteString;
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import org.forgerock.opendj.ldap.ByteStringBuilder;
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import org.forgerock.opendj.ldap.ByteSequenceReader;
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import org.opends.server.types.operation.*;
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/**
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* Abstract class that must be extended to define a message
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* used for sending Updates between servers.
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*/
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public abstract class LDAPUpdateMsg extends UpdateMsg
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{
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/**
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* The DN on which the update was originally done.
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*/
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protected DN dn;
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/**
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* The entryUUID of the entry that was updated.
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*/
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protected String entryUUID;
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/**
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* Encoded form of the LDAPUpdateMsg.
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*/
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protected byte[] bytes;
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/**
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* Encoded form of entry attributes.
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*/
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protected byte[] encodedEclIncludes = new byte[0];
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/**
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* Creates a new UpdateMsg.
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*/
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protected LDAPUpdateMsg()
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{
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}
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/**
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* Creates a new UpdateMsg with the given information.
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*
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* @param ctx The replication Context of the operation for which the
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* update message must be created,.
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* @param dn The DN of the entry on which the change
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* that caused the creation of this object happened
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*/
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LDAPUpdateMsg(OperationContext ctx, DN dn)
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{
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this.protocolVersion = ProtocolVersion.getCurrentVersion();
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this.csn = ctx.getCSN();
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this.entryUUID = ctx.getEntryUUID();
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this.dn = dn;
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}
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/**
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* Creates a new UpdateMessage with the given information.
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*
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* @param csn The CSN of the operation for which the
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* UpdateMessage is created.
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* @param entryUUID The Unique identifier of the entry that is updated
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* by the operation for which the UpdateMessage is created.
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* @param dn The DN of the entry on which the change
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* that caused the creation of this object happened
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*/
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LDAPUpdateMsg(CSN csn, String entryUUID, DN dn)
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{
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this.protocolVersion = ProtocolVersion.getCurrentVersion();
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this.csn = csn;
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this.entryUUID = entryUUID;
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this.dn = dn;
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}
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/**
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* Generates an Update message with the provided information.
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*
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* @param op The operation for which the message must be created.
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* @return The generated message.
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*/
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public static LDAPUpdateMsg generateMsg(PostOperationOperation op)
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{
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switch (op.getOperationType())
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{
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case MODIFY :
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return new ModifyMsg((PostOperationModifyOperation) op);
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case ADD:
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return new AddMsg((PostOperationAddOperation) op);
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case DELETE :
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return new DeleteMsg((PostOperationDeleteOperation) op);
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case MODIFY_DN :
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return new ModifyDNMsg( (PostOperationModifyDNOperation) op);
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default:
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return null;
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}
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}
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/**
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* Get the DN on which the operation happened.
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*
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* @return The DN on which the operations happened.
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*/
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public DN getDN()
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{
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return dn;
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}
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/**
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* Set the DN.
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* @param dn The dn that must now be used for this message.
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*/
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public void setDN(DN dn)
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{
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this.dn = dn;
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}
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/**
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* Get the entryUUID of the entry on which the operation happened.
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*
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* @return The entryUUID of the entry on which the operation happened.
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*/
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public String getEntryUUID()
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{
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return entryUUID;
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}
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/**
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* Create and Operation from the message.
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*
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* @param conn connection to use when creating the message
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* @return the created Operation
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* @throws LDAPException In case of LDAP decoding exception.
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* @throws IOException In case of ASN1 decoding exception.
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* @throws DataFormatException In case of bad msg format.
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*/
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public Operation createOperation(InternalClientConnection conn)
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throws LDAPException, IOException, DataFormatException
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{
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return createOperation(conn, dn);
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}
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/**
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* Create and Operation from the message using the provided DN.
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*
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* @param conn connection to use when creating the message.
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* @param newDN the DN to use when creating the operation.
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* @return the created Operation.
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* @throws LDAPException In case of LDAP decoding exception.
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* @throws IOException In case of ASN1 decoding exception.
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* @throws DataFormatException In case of bad msg format.
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*/
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public abstract Operation createOperation(InternalClientConnection conn,
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DN newDN) throws LDAPException, IOException, DataFormatException;
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// ============
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// Msg encoding
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// ============
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/**
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* Do all the work necessary for the encoding.
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*
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* This is useful in case when one wants to perform this outside
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* of a synchronized portion of code.
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*
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* This method is not synchronized and therefore not MT safe.
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*/
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public void encode()
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{
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bytes = getBytes(ProtocolVersion.getCurrentVersion());
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}
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/** {@inheritDoc} */
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@Override
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public ByteArrayBuilder encodeHeader(byte msgType, short protocolVersion)
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{
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/* The message header is stored in the form :
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* <operation type><protocol version><CSN><dn><entryuuid><assured>
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* <assured mode> <safe data level>
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*/
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final ByteArrayBuilder builder = new ByteArrayBuilder();
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builder.appendByte(msgType);
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builder.appendByte((byte) protocolVersion);
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builder.appendCSNUTF8(csn);
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builder.appendDN(dn);
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builder.appendString(entryUUID);
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builder.appendBoolean(assuredFlag);
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builder.appendByte(assuredMode.getValue());
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builder.appendByte(safeDataLevel);
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return builder;
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}
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/**
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* Encode the common header for all the UpdateMessage. This uses the version
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* 1 of the replication protocol (used for compatibility purpose).
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*
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* @param msgType the type of UpdateMessage to encode.
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* @return a byte array builder containing the common header
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*/
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ByteArrayBuilder encodeHeader_V1(byte msgType)
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{
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/* The message header is stored in the form :
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* <operation type><CSN><dn><assured><entryuuid><change>
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*/
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final ByteArrayBuilder builder = new ByteArrayBuilder();
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builder.appendByte(msgType);
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builder.appendCSNUTF8(csn);
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builder.appendBoolean(assuredFlag);
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builder.appendDN(dn);
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builder.appendString(entryUUID);
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return builder;
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}
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/** {@inheritDoc} */
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@Override
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public byte[] getBytes(short protocolVersion)
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{
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if (protocolVersion == ProtocolVersion.REPLICATION_PROTOCOL_V1)
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{
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return getBytes_V1();
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}
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else if (protocolVersion <= ProtocolVersion.REPLICATION_PROTOCOL_V3)
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{
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return getBytes_V23();
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}
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else
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{
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// Encode in the current protocol version
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if (bytes == null)
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{
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// this is the current version of the protocol
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bytes = getBytes_V45(protocolVersion);
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}
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return bytes;
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}
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}
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/**
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* Get the byte array representation of this message. This uses the version
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* 1 of the replication protocol (used for compatibility purpose).
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*
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* @return The byte array representation of this message.
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*/
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protected abstract byte[] getBytes_V1();
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/**
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* Get the byte array representation of this message. This uses the version
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* 2 of the replication protocol (used for compatibility purpose).
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*
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* @return The byte array representation of this message.
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*/
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protected abstract byte[] getBytes_V23();
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/**
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* Get the byte array representation of this message. This uses the provided
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* version number which must be version 4 or newer.
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*
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* @param protocolVersion the actual protocol version to encode into
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* @return The byte array representation of this Message.
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*/
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protected abstract byte[] getBytes_V45(short protocolVersion);
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/**
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* Encode a list of attributes.
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*/
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private static byte[] encodeAttributes(Collection<Attribute> attributes)
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{
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if (attributes==null)
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{
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return new byte[0];
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}
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try
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{
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ByteStringBuilder byteBuilder = new ByteStringBuilder();
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ASN1Writer writer = ASN1.getWriter(byteBuilder);
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for (Attribute a : attributes)
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{
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new LDAPAttribute(a).write(writer);
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}
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return byteBuilder.toByteArray();
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}
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catch (Exception e)
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{
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return null;
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}
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}
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// ============
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// Msg decoding
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// ============
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/**
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* Decode the Header part of this Update message, and check its type.
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*
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* @param scanner the encoded form of the UpdateMsg.
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* @param allowedTypes The allowed types of this Update Message.
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* @throws DataFormatException if the encodedMsg does not contain a valid
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* common header.
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*/
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void decodeHeader(ByteArrayScanner scanner, byte... allowedTypes)
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throws DataFormatException
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{
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final byte msgType = scanner.nextByte();
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if (!isTypeAllowed(msgType, allowedTypes))
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{
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throw new DataFormatException("byte[] is not a valid update msg: "
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+ msgType);
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}
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if (msgType == MSG_TYPE_ADD_V1
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|| msgType == MSG_TYPE_DELETE_V1
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|| msgType == MSG_TYPE_MODIFYDN_V1
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|| msgType == MSG_TYPE_MODIFY_V1)
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{
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/*
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* For older protocol versions, decode the matching version header instead
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*/
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// Force version to V1 (other new parameters take their default values
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// (assured stuff...))
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protocolVersion = ProtocolVersion.REPLICATION_PROTOCOL_V1;
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csn = scanner.nextCSNUTF8();
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assuredFlag = scanner.nextBoolean();
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dn = scanner.nextDN();
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entryUUID = scanner.nextString();
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}
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else
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{
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protocolVersion = scanner.nextByte();
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csn = scanner.nextCSNUTF8();
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dn = scanner.nextDN();
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entryUUID = scanner.nextString();
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assuredFlag = scanner.nextBoolean();
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assuredMode = AssuredMode.valueOf(scanner.nextByte());
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safeDataLevel = scanner.nextByte();
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}
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}
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private boolean isTypeAllowed(final byte msgType, byte... allowedTypes)
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{
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for (byte allowedType : allowedTypes)
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{
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if (msgType == allowedType)
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{
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return true;
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}
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}
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return false;
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}
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/** {@inheritDoc} */
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@Override
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public abstract int size();
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/**
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* Return the number of bytes used by the header.
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* @return The number of bytes used by the header.
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*/
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protected int headerSize()
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{
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return 100; // 100 let's assume header size is 100
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}
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/**
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* Set a provided list of entry attributes.
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* @param entryAttrs The provided list of entry attributes.
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*/
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public void setEclIncludes(Collection<Attribute> entryAttrs)
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{
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this.encodedEclIncludes = encodeAttributes(entryAttrs);
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}
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/**
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* Returns the list of entry attributes.
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* @return The list of entry attributes.
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*/
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public ArrayList<RawAttribute> getEclIncludes()
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{
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try
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{
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return decodeRawAttributes(this.encodedEclIncludes);
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}
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catch(Exception e)
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{
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return null;
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}
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}
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/**
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* Decode a provided byte array as a list of RawAttribute.
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* @param in The provided byte array.
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* @return The list of RawAttribute objects.
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* @throws LDAPException when it occurs.
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* @throws DecodeException when it occurs.
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*/
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ArrayList<RawAttribute> decodeRawAttributes(byte[] in)
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throws LDAPException, DecodeException
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{
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ArrayList<RawAttribute> rattr = new ArrayList<>();
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try
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{
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ByteSequenceReader reader =
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ByteString.wrap(in).asReader();
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ASN1Reader asn1Reader = ASN1.getReader(reader);
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// loop on attributes
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while(asn1Reader.hasNextElement())
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{
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rattr.add(LDAPAttribute.decode(asn1Reader));
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}
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return rattr;
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}
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catch(Exception e)
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{
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return null;
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}
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}
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/**
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* Decode a provided byte array as a list of Attribute.
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* @param in The provided byte array.
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* @return The list of Attribute objects.
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* @throws LDAPException when it occurs.
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* @throws DecodeException when it occurs.
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*/
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ArrayList<Attribute> decodeAttributes(byte[] in)
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throws LDAPException, DecodeException
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{
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ArrayList<Attribute> lattr = new ArrayList<>();
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try
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{
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ByteSequenceReader reader =
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ByteString.wrap(in).asReader();
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ASN1Reader asn1Reader = ASN1.getReader(reader);
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// loop on attributes
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while(asn1Reader.hasNextElement())
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{
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lattr.add(LDAPAttribute.decode(asn1Reader).toAttribute());
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}
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return lattr;
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}
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catch(Exception e)
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{
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return null;
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}
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}
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}
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