/*
* File : FMFileManagerLimited.java
* Created : 12-Feb-2004
* By : parg
*
* Azureus - a Java Bittorrent client
*
* 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.
*
* 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 ( see the LICENSE file ).
*
* 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
*/
package com.aelitis.azureus.core.diskmanager.file.impl;
/**
* @author parg
*
*/
//import java.nio.ByteBuffer;
import java.io.File;
import org.gudy.azureus2.core3.util.DirectByteBuffer;
import com.aelitis.azureus.core.diskmanager.file.*;
public class
FMFileLimited
extends FMFileImpl
{
protected
FMFileLimited(
FMFileOwner _owner,
FMFileManagerImpl _manager,
File _file,
int _type )
throws FMFileManagerException
{
super( _owner, _manager, _file, _type );
}
protected
FMFileLimited(
FMFileLimited basis )
throws FMFileManagerException
{
super( basis );
}
public FMFile
createClone()
throws FMFileManagerException
{
return( new FMFileLimited( this ));
}
public void
ensureOpen(
String reason )
throws FMFileManagerException
{
try{
this_mon.enter();
if ( isOpen()){
usedSlot();
}else{
getSlot();
try{
super.ensureOpen( reason );
}finally{
if ( !isOpen()){
releaseSlot();
}
}
}
}finally{
this_mon.exit();
}
}
protected void
getSlot()
{
getManager().getSlot(this);
}
protected void
releaseSlot()
{
getManager().releaseSlot(this);
}
protected void
usedSlot()
{
getManager().usedSlot(this);
}
public void
setAccessMode(
int mode )
throws FMFileManagerException
{
try{
this_mon.enter();
if ( mode != getAccessMode()){
close(false);
}
setAccessModeSupport( mode );
}finally{
this_mon.exit();
}
}
public long
getLength()
throws FMFileManagerException
{
try{
this_mon.enter();
ensureOpen( "FMFileLimited:getLength" );
return( getLengthSupport());
}finally{
this_mon.exit();
}
}
public void
setLength(
long length )
throws FMFileManagerException
{
try{
this_mon.enter();
ensureOpen( "FMFileLimited:setLength" );
setLengthSupport( length );
}finally{
this_mon.exit();
}
}
public void
setPieceComplete(
int piece_number,
DirectByteBuffer piece_data )
throws FMFileManagerException
{
try{
this_mon.enter();
if ( isPieceCompleteProcessingNeeded( piece_number )){
ensureOpen( "FMFileLimited:setPieceComplete" );
boolean switched_mode = false;
if ( getAccessMode() != FM_WRITE ){
setAccessMode( FM_WRITE );
switched_mode = true;
// switching mode closes the file...
ensureOpen( "FMFileLimited:setPieceComplete2" );
}
try{
setPieceCompleteSupport( piece_number, piece_data );
}finally{
if ( switched_mode ){
setAccessMode( FM_READ );
}
}
}
}finally{
this_mon.exit();
}
}
public void
read(
DirectByteBuffer[] buffers,
long offset )
throws FMFileManagerException
{
try{
this_mon.enter();
ensureOpen( "FMFileLimited:read" );
readSupport( buffers, offset );
}finally{
this_mon.exit();
}
}
public void
read(
DirectByteBuffer buffer,
long offset )
throws FMFileManagerException
{
try{
this_mon.enter();
ensureOpen( "FMFileLimited:read" );
readSupport( buffer, offset );
}finally{
this_mon.exit();
}
}
public void
write(
DirectByteBuffer buffer,
long position )
throws FMFileManagerException
{
try{
this_mon.enter();
ensureOpen( "FMFileLimited:write" );
writeSupport( buffer, position );
}finally{
this_mon.exit();
}
}
public void
write(
DirectByteBuffer[] buffers,
long position )
throws FMFileManagerException
{
try{
this_mon.enter();
ensureOpen( "FMFileLimited:write" );
writeSupport( buffers, position );
}finally{
this_mon.exit();
}
}
public void
close()
throws FMFileManagerException
{
try{
this_mon.enter();
close(true);
}finally{
this_mon.exit();
}
}
protected void
close(
boolean explicit )
throws FMFileManagerException
{
try{
this_mon.enter();
boolean was_open = isOpen();
try{
closeSupport( explicit );
}finally{
if ( was_open ){
releaseSlot();
}
}
}finally{
this_mon.exit();
}
}
}