/**
* Ecrit la piece donnée dans le fichier temporaire sur le disque
*
* @param piece : pièce à écrire
* @param num : numéros de la pièce
*/
private synchronized void writePieceTmpFile(byte[] piece, int num) {
if (num < 0 || num >= this.nbPieces()) {
throw new IllegalArgumentException();
}
if (piece.length > _piecesize) {
throw new IllegalArgumentException();
}
try {
RandomAccessFile writer_tmp = new RandomAccessFile(this, "rw");
FileChannel writer = writer_tmp.getChannel();
int index_piece = ((int) this.length() - this.headerSize()) / _piecesize;
if (piece.length < _piecesize) {
piece = Arrays.copyOf(piece, _piecesize);
}
Tools.write(writer, 4 + _key.length() + 4 + 4 + 4 * num, index_piece);
Tools.write(writer, this.headerSize() + _piecesize * index_piece, piece);
writer.force(true);
writer_tmp.close();
} catch (Exception e) {
System.out.println("Unable to write tmp file piece");
e.printStackTrace();
}
}
/** Initialise le header du fichier temporaire */
private void initHeaderTmpFile() {
try {
FileOutputStream writer_tmp = new FileOutputStream(this);
FileChannel writer = writer_tmp.getChannel();
int offset = 0;
// Taille de la clef
Tools.write(writer, offset, _key.length());
offset += 4;
// Clef
Tools.write(writer, offset, _key);
offset += _key.length();
// Size
Tools.write(writer, offset, _size);
offset += 4;
// piecesize
Tools.write(writer, offset, _piecesize);
offset += 4;
// Buffermap
int i;
for (i = 0; i < this.nbPieces(); i++) {
Tools.write(writer, offset, -1);
offset += 4;
}
writer.force(true);
writer_tmp.close();
} catch (Exception e) {
System.out.println("Unable to create a new tmp file");
e.printStackTrace();
}
}
/**
* Créer le fichier complet correspondant Copie et réassemble les données Supprime le fichier
* temporaire et renvoi le nouveau fichier
*/
public synchronized FileShared tmpToComplete() {
String name = this.getName();
name = name.substring(0, name.length() - ((String) App.config.get("tmpExtension")).length());
File complete = new File(App.config.get("downloadDir") + File.separator + name);
if (complete.exists()) {
throw new IllegalArgumentException();
}
try {
FileOutputStream writer_tmp = new FileOutputStream(complete, true);
FileChannel writer = writer_tmp.getChannel();
int i;
for (i = 0; i < this.nbPieces(); i++) {
byte[] piece = this.readPieceTmpFile(i);
Tools.write(writer, 0, piece);
}
writer.force(true);
writer_tmp.close();
} catch (Exception e) {
System.out.println("Unable to write complete file");
e.printStackTrace();
}
this.delete();
return new FileShared(name);
}
