/*
* Created on Jul 15, 2007
* Created by Paul Gardner
* Copyright (C) 2007 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 63.529,40 euros
* 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
*
*/
package org.gudy.azureus2.core3.disk.impl.piecemapper.impl;
import org.gudy.azureus2.core3.disk.impl.DiskManagerFileInfoImpl;
import org.gudy.azureus2.core3.disk.impl.piecemapper.DMPieceList;
import org.gudy.azureus2.core3.disk.impl.piecemapper.DMPieceMap;
import org.gudy.azureus2.core3.disk.impl.piecemapper.DMPieceMapEntry;
import org.gudy.azureus2.core3.torrent.TOTorrent;
public class
DMPieceMapSimple
implements DMPieceMap
{
final private int piece_length;
final private int piece_count;
final private int last_piece_length;
final private DiskManagerFileInfoImpl file;
protected
DMPieceMapSimple(
TOTorrent torrent,
DiskManagerFileInfoImpl _file )
{
piece_length = (int)torrent.getPieceLength();
piece_count = torrent.getNumberOfPieces();
int lpl = (int)( torrent.getSize() % piece_length );
if ( lpl == 0 ){
lpl = piece_length;
}
last_piece_length = lpl;
file = _file;
}
public DMPieceList
getPieceList(
int piece_number )
{
return( new pieceList( piece_number ));
}
protected class
pieceList
implements DMPieceList, DMPieceMapEntry
{
private int piece_number;
protected
pieceList(
int _piece_number )
{
piece_number = _piece_number;
}
public int
size()
{
return( 1 );
}
public DMPieceMapEntry
get(
int index )
{
return( this );
}
public int
getCumulativeLengthToPiece(
int file_index )
{
return( getLength());
}
// map entry
public DiskManagerFileInfoImpl
getFile()
{
return( file );
}
public long
getOffset()
{
return(((long)piece_number) * piece_length );
}
public int
getLength()
{
if ( piece_number == piece_count - 1 ){
return( last_piece_length );
}else{
return( piece_length );
}
}
}
}