add correct variable type code patcher

labs/2/Main.java

@@ -0,0 +1,159 @@
+import java.util.Objects;
+import java.lang.Exception;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.Scanner;
+
+import java.net.URL;
+import java.io.BufferedInputStream;
+import java.io.FileOutputStream;
+
+import java.util.ArrayList;
+
+public class Main {
+    public static void main(String[] args) {
+        boolean help_enqueued = false;
+        boolean allow_networking = true;
+        String matrix_file_name = "";
+
+        int p = 0;
+        while (p < args.length) {
+            try {
+                if (Objects.equals(args[p], "-h")) {    
+                    help_enqueued = true;
+                    p += 1;
+                }
+                else if (Objects.equals(args[p], "--offline")) {
+                    allow_networking = false;
+                    p += 2;
+                }
+                else {
+                    matrix_file_name = args[p++];
+                }
+            }
+            catch (Exception e) {
+                System.err.println("[ERROR] Exception while parsing CLI arguments: " + e);
+                System.err.println("[ERROR] Aborting further execution.");
+                System.exit(1);
+            }
+        }
+
+        if (help_enqueued) {
+            printHelp(allow_networking);
+            System.exit(0);
+        }
+
+        if (Objects.equals("", matrix_file_name)) {
+            System.err.println("[WARN] No filename specified to read from, using default one");
+            matrix_file_name = "random_matrix.txt";
+        }
+
+        File matrix_file = new File(matrix_file_name);
+        if (!matrix_file.exists()) {
+            if (allow_networking) {
+                System.err.println("[WARN] File is missing, downloading random matrix from the server");
+                fetchResource("http://lab2.kpi.dev:16554/matrix.py", matrix_file_name);
+            } else {
+                System.err.println("[WARN] File is missing; networking is disabled, not recovering");
+                System.exit(1);
+            }
+        }
+
+        // loading matrix data from file
+        int[][] raw_m = loadMatrixFromFile(matrix_file);
+
+        // creating original matrix object
+        System.out.println("Original matrix:");
+        Matrix m = new Matrix();
+        m.init(raw_m);
+        
+        // transposing
+        m.transpose();
+        System.out.println("\nTransposed matrix:");
+        m.print();
+
+        // avg
+        System.out.println("\nAverage value is " + m.getAvg());
+    }
+
+    private static void fetchResource(String remote_url, String output_filename) {
+        try {
+            BufferedInputStream in = new BufferedInputStream(new URL(remote_url).openStream());
+            FileOutputStream fileOutputStream = new FileOutputStream(output_filename);
+
+            byte dataBuffer[] = new byte[1024];
+            int bytesRead;
+            while ((bytesRead = in.read(dataBuffer, 0, 1024)) != -1) {
+                fileOutputStream.write(dataBuffer, 0, bytesRead);
+            }
+        } catch (Exception e) {
+            System.out.println("[ERROR] Failed to fetch resource " + output_filename + "from " + remote_url + " due to the following exception: " + e);
+        }
+    }
+
+    private static void printHelp(boolean allow_net) {
+        try {
+            File help_file = new File("src/help.txt");
+
+            if (!help_file.exists()) {
+                System.err.println("[WARN] Help file is missing.");
+                if (allow_net) {
+                    System.err.println("[INFO] Trying to recover it from the git server");
+                    fetchResource("http://lab2.kpi.dev:3000/dymik739/oop-labs-collection/raw/branch/lab2-dev/labs/2/src/help.txt", "src/help.txt");
+                } else {
+                    System.err.println("[INFO] Networking is disabled, not recovering");
+                    System.exit(1);
+                }
+            }
+    
+            Scanner help_file_scanner = new Scanner(help_file);
+
+            while (help_file_scanner.hasNextLine()) {
+                System.out.println(help_file_scanner.nextLine());
+            }
+    
+            help_file_scanner.close(); 
+        } catch (Exception e) {
+            System.out.println("[ERROR] Failed to read help due to the following exception: " + e);
+            System.exit(1);
+        }
+    }
+
+    private static int[][] loadMatrixFromFile(File matrix_file) {
+        try {
+            Scanner matrix_file_reader = new Scanner(matrix_file);
+
+            ArrayList<String> raw_matrix_lines = new ArrayList<String>();
+            while (matrix_file_reader.hasNextLine()) {
+                raw_matrix_lines.add(matrix_file_reader.nextLine());
+            }
+    
+            ArrayList<String[]> baked_matrix_lines = new ArrayList<String[]>();
+    
+            for (String s : raw_matrix_lines) {
+                baked_matrix_lines.add(s.split(" "));
+            }
+            
+            int ref_length = baked_matrix_lines.get(0).length;
+            int[][] baked_matrix = new int[baked_matrix_lines.size()][ref_length];
+            
+            for (int i = 0; i < baked_matrix_lines.size(); i++) {
+                if (baked_matrix_lines.get(i).length != ref_length) {
+                    System.err.println("[ERROR] Matrix lines have different length! Assuming the matrix was corrupted");
+                    System.exit(2);
+                }
+
+                for (int j = 0; j < baked_matrix_lines.get(i).length; j++) {
+                    baked_matrix[i][j] = Integer.parseInt(baked_matrix_lines.get(i)[j]);
+                }
+            }
+
+            return baked_matrix;
+        } catch (Exception e) {
+            System.err.println("[ERROR] Failed to read matrix from file " + matrix_file.getName());
+            System.exit(1);
+            return new int[1][1];
+        }
+    }
+}

labs/2/Matrix.java

@@ -0,0 +1,63 @@
+public class Matrix {
+    private int[][] m;
+
+    public void init(int[][] base_m) {
+        this.m = base_m;
+    }
+
+    public int[][] getMatrix() {
+        return this.m;
+    }
+
+    public void print() {
+        for (int[] ml : this.m) {
+            for (int e : ml) {
+                System.out.printf("%4d ", e);
+            }
+            System.out.println();
+        }
+    }
+
+    public void transpose() {
+        print();
+        if (this.m[0].length != this.m.length) {
+            int new_h = this.m[0].length;
+            int new_w = this.m.length;
+
+            int[][] new_m = new int[new_h][new_w];
+
+            for (int i = 0; i < this.m.length; i++) {
+                for (int j = 0; j < this.m[i].length; j++) {
+                    new_m[j][i] = this.m[i][j];
+                }
+            }
+
+            this.m = new_m;
+        } else {
+            // if a matrix is square, there is no need to
+            // make a new one
+
+            int temp_value_holder;
+
+            for (int i = 0; i < this.m.length; i++) {
+                for (int j = 0; j < i; j++) {
+                    temp_value_holder = this.m[i][j];
+                    this.m[i][j] = this.m[j][i];
+                    this.m[j][i] = temp_value_holder;
+                }
+            }
+        }
+    }
+
+    public double getAvg() {
+        double total = 0;
+
+        for (int[] ml : this.m) {
+            for (int e : ml) {
+                total += e;
+            }
+        }
+
+        return total / (this.m.length * this.m[0].length);
+    }
+}

labs/2/src/help.txt

@@ -0,0 +1,4 @@
+Usage: java Main [options] [matrix_file]
+Options:
+    -h         Output this help text
+    --offline  Prevent any possible attempt to fetch missing files from the server

labs/2/transform-to-double.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+sed -i 's/int/double/g;s/prdouble/print/g;s/Integer.parseInt/Double.parseDouble/g;s/for (double i/for (int i/g;s/for (double j/for (int j/g;s/matrix.py/double-matrix.py/g;s/double p/int p/g;s/double bytesRead/int bytesRead/g;s/double ref_length/int ref_length/g;s/double new/int new/g;s/%4d/%4.3f/g' Matrix.java Main.java
+
+javac Main.java Matrix.java
+rm random_matrix.txt

labs/2/web/double-matrix.py

@@ -0,0 +1,2 @@
+import random
+print("Content-Type: text/plain\n\n" + "\n".join([" ".join(list(map(str, [round((random.random()-0.5)*200, 4) for i in range(7)]))) for i in range(7)]))

labs/2/web/matrix.py

@@ -0,0 +1,2 @@
+import random
+print("Content-Type: text/plain\n\n" + "\n".join([" ".join(list(map(str, [random.randint(-40, 40) for i in range(7)]))) for i in range(7)]))