/*
* Created on Jun 17, 2005
* Created by Alon Rohter
* Copyright (C) 2005, 2006 Aelitis, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* AELITIS, SAS au capital de 46,603.30 euros
* 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
*
*/
package com.aelitis.azureus.core.peermanager.messaging;
import java.util.Map;
import org.gudy.azureus2.core3.util.*;
public class MessagingUtil {
/**
* Convert the given message payload map to a bencoded byte stream.
* @param payload to convert
* @return bencoded serialization
*/
public static DirectByteBuffer convertPayloadToBencodedByteStream( Map payload, byte alloc_id ) {
byte[] raw_payload;
try {
raw_payload = BEncoder.encode( payload );
}
catch( Throwable t ) {
Debug.out( t );
raw_payload = new byte[0];
}
DirectByteBuffer buffer = DirectByteBufferPool.getBuffer( alloc_id, raw_payload.length );
buffer.put( DirectByteBuffer.SS_MSG, raw_payload );
buffer.flip( DirectByteBuffer.SS_MSG );
return buffer;
}
/**
* Convert the given bencoded byte stream into a message map.
* @param stream to convert
* @param min_size of stream
* @param id of message
* @return mapped deserialization
* @throws MessageException on convertion error
* NOTE: Does not auto-return given direct buffer on thrown exception.
*/
public static Map convertBencodedByteStreamToPayload( DirectByteBuffer stream, int min_size, String id ) throws MessageException {
if( stream == null ) {
throw new MessageException( "[" +id +"] decode error: stream == null" );
}
if( stream.remaining( DirectByteBuffer.SS_MSG ) < min_size ) {
throw new MessageException( "[" +id +"] decode error: stream.remaining[" +stream.remaining( DirectByteBuffer.SS_MSG )+ "] < " +min_size );
}
byte[] raw = new byte[ stream.remaining( DirectByteBuffer.SS_MSG ) ];
stream.get( DirectByteBuffer.SS_MSG, raw );
try {
Map result = BDecoder.decode( raw );
stream.returnToPool();
return( result );
}catch( Throwable t ) {
throw new MessageException( "[" +id+ "] payload stream b-decode error: " +t.getMessage() );
}
}
}