SAE21_2022/src/FileManager.java

106 lines
3.8 KiB
Java
Raw Normal View History

import java.io.*;
/**
* Class to manage file import/export
* @version 1.0
* @author Amir Daouadi
* @author Lyanis Souidi
*/
public class FileManager {
/**
* Import a grid from a file
* @param file The file to import
* @return The imported grid
* @throws Exception If an error occurs during the import
*/
public static Grid importGrid(File file) throws Exception {
Grid grid;
try {
FileInputStream fs = new FileInputStream(file);
DataInputStream ds = new DataInputStream(fs);
try {
grid = new Grid(ds.readByte());
grid.getThesee().setSquare(grid.getSquare(ds.readByte(), ds.readByte()));
grid.getSquare(ds.readByte(), ds.readByte()).setExit();
int bit = 8;
byte value = 0;
for (int i = 0; i < grid.getSize(); i++) {
for (int j = 0; j < grid.getSize(); j++) {
if (bit == 8) {
value = ds.readByte();
bit = 0;
}
if (((value >> (7 - bit)) & 1) == 1) grid.getSquare(j, i).setWall();
bit++;
}
}
ds.close();
} catch (Exception e) {
throw new Exception("Une erreur est survenue lors de la lecture du fichier.");
}
return grid;
} catch (FileNotFoundException e){
throw new Exception("Fichier non trouvé.");
}
}
/**
* Export a grid to a file
* @param grid The grid to export
* @param file The file to export to
* @throws Exception If an error occurs during the export
*/
public static void exportGrid(Grid grid, File file) throws Exception {
try {
FileOutputStream fs = new FileOutputStream(file);
DataOutputStream ds = new DataOutputStream(fs);
try {
// Écriture de la taille de la grille
ds.writeByte(grid.getSize());
2023-04-28 02:41:09 +02:00
// Écriture de la position de Thésée
Square theseeSquare = grid.getThesee().getSquare();
ds.writeByte(theseeSquare.getRow());
ds.writeByte(theseeSquare.getColumn());
2023-04-28 02:41:09 +02:00
// Écriture de la position de la sortie
for (int i = 0; i < grid.getSize(); i++) {
for (int j = 0; j < grid.getSize(); j++) {
Square square = grid.getSquare(i, j);
if (square.isExit()) {
ds.writeByte(square.getRow());
ds.writeByte(square.getColumn());
break;
}
2023-04-28 02:41:09 +02:00
}
}
// Écriture des murs
int bit = 0;
byte value = 0;
for (int i = 0; i < grid.getSize(); i++) {
for (int j = 0; j < grid.getSize(); j++) {
Square square = grid.getSquare(j, i);
if (square.isWall()) {
value |= 1 << (7 - bit);
}
bit++;
if (bit == 8) {
ds.writeByte(value);
value = 0;
bit = 0;
}
2023-04-28 02:41:09 +02:00
}
}
if (bit != 0) {
ds.writeByte(value);
}
} catch (Exception e) {
throw new Exception("Une erreur est survenue lors de l'écriture du fichier.");
2023-04-28 02:41:09 +02:00
}
} catch (FileNotFoundException e){
throw new Exception("Fichier non trouvé.");
}
}
}