/**
* Lis et retourne une piece depuis le fichier temporaire sur le disque (la piece doit exister)
*
* @param num : numéros de la piece
*/
private synchronized byte[] readPieceTmpFile(int num) {
if (num < 0 || num >= this.nbPieces()) {
throw new IllegalArgumentException();
}
try {
FileInputStream reader_tmp = new FileInputStream(this);
FileChannel reader = reader_tmp.getChannel();
int index_piece = Tools.readInt(reader, 4 + _key.length() + 4 + 4 + 4 * num);
if (index_piece < 0) {
throw new IllegalArgumentException();
}
int size = _piecesize;
if (num == this.nbPieces() - 1) {
size = _size - _piecesize * (this.nbPieces() - 1);
}
byte[] piece = Tools.readBytes(reader, this.headerSize() + _piecesize * index_piece, size);
reader_tmp.close();
return piece;
} catch (Exception e) {
System.out.println("Unable to read tmp file piece");
e.printStackTrace();
}
return new byte[0];
}
/**
* Lis et retourne une pièce depuis le fichier complet sur le disque
*
* @param num : numéros de la piece
*/
private byte[] readPieceCompleteFile(int num) {
if (num < 0 || num >= this.nbPieces()) {
throw new IllegalArgumentException();
}
try {
FileInputStream reader_tmp = new FileInputStream(this);
FileChannel reader = reader_tmp.getChannel();
int size = _piecesize;
if (num == this.nbPieces() - 1) {
size = _size - _piecesize * (this.nbPieces() - 1);
}
byte[] piece = Tools.readBytes(reader, _piecesize * num, size);
reader_tmp.close();
return piece;
} catch (Exception e) {
System.out.println("Unable to read complete file piece");
e.printStackTrace();
}
return new byte[0];
}