/*
* Created on 08-Oct-2004
* Created by Paul Gardner
* Copyright (C) 2004, 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 org.gudy.azureus2.core3.disk;
/**
* Represents a DiskManager Piece
*
* @author parg
* @author MjrTom
* 2005/Oct/08: priority handling
* 2006/Jan/2: refactoring, mostly to base Piece interface
*/
public interface
DiskManagerPiece
{
public DiskManager getManager();
public int getLength();
public int getPieceNumber();
public int getNbBlocks();
public int getBlockSize( int block_index );
public short getReadCount();
public void setReadCount(short c);
public boolean calcNeeded();
public void clearNeeded();
/** @return true if any file the piece covers is neither Do Not Download nor Delete.
* This is not a real-time indicator. Also, the results are not reliable for pieces that are Done.
* Use calcNeeded() for guaranteed correct and up to date results
* @see calcNeeded(), clearNeeded(), setNeeded(), setNeeded(boolean)
*/
public boolean isNeeded();
public void setNeeded();
public void setNeeded(boolean b);
// a piece is Written if data has been written to storage for every block (without concern for if it's checked)
public boolean isWritten();
public int getNbWritten();
public boolean[] getWritten();
/**
* @param blockNumber int
* @return true if the given blockNumber has already been written to disk
*/
public boolean isWritten(int blockNumber);
public void setWritten(int blockNumber);
// a piece is Checking if a hash check has been setup and the hash check hasn't finalized the result yet
// this flag is asynch, so be careful, and it's also transitory (comapared to most of the others being kinda sticky)
public void setChecking();
public boolean isChecking();
public boolean isNeedsCheck();
public boolean calcDone();
/** @return true when the hash check has passed and the DiskManager has asyncronously updated the Done status.
* There is nothing further to be done regarding downloading for pieces that are Done.
*/
public boolean isDone();
public void setDone(boolean b);
/**
* @return true if a piece is Needed and not Done
*/
public boolean isInteresting();
/** This must not be used to qualify pieces in End Game Mode.
* @return true if a piece is Needed but is not fully; Requested, Downloaded, Written, Checking, or Done.
*/
public boolean isDownloadable();
public void setDownloadable();
/**
* returns true if all the files that the piece spans are skipped
* @return
*/
public boolean isSkipped();
public void reDownloadBlock(int blockNumber);
public void reset();
public String
getString();
}
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