Android Open Source - SudokuSolver J S O N Helper

From Project

Back to project page SudokuSolver.

License

The source code is released under:

License JSON Sudoku Solver is covered under the Creative Commons Attribution 3.0 Unported License http://creativecommons.org/licenses/by/3.0/ Credits Sudoku Solver Java implementation: Kevin Coulombe...

If you think the Android project SudokuSolver listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

/**
 * JSON Sudoku solver is covered under the Creative Commons Attribution 3.0 Unported License
 * http://creativecommons.org/licenses/by/3.0/
 * //ww w  . j  a v  a 2s .co m
 * @author: Andrea Bizzotto {@link www.musevisions.com}, {@link www.bizzotto.biz}
 * @email: bizz84dev@gmail.com
 */
package com.musevisions.android.SudokuSolver;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.nio.charset.Charset;

import org.json.JSONArray;
import org.json.JSONException;

/** Main helper class used to fetch Sudoku data from an input stream or URL */
public class JSONHelper {

  private static final int SUDOKU_LEN = 81;
  
  private static String readAll(Reader rd) throws IOException {
    StringBuilder sb = new StringBuilder();
    int cp;
    while ((cp = rd.read()) != -1) {
      sb.append((char) cp);
    }
    return sb.toString();
  }

  public static JSONArray readJSONArrayFromIS(InputStream is) throws IOException {
    try {
      BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
      String jsonText = readAll(rd).replace("\n", " ");
      return new JSONArray(jsonText);
    }
    catch (IOException e) {
      e.printStackTrace();
    }
    catch (JSONException e) {
      e.printStackTrace();
    }
    finally {
      is.close();
    }
    return null;
  }

  public static JSONArray readJsonFromUrl(String url) throws IOException, JSONException {
    InputStream is = new URL(url).openStream();
    return readJSONArrayFromIS(is);
  }
  
  /** JSON Array - int[] conversion */
  public static int[] toIntArray(JSONArray array) {
       
    try {
      assert(array.length() == SUDOKU_LEN);
      int intArray[] = new int[SUDOKU_LEN];
      for (int i = 0; i < SUDOKU_LEN; i++) {
        intArray[i] = array.getInt(i);
      }
      return intArray;
    }
    catch (JSONException e) {
      e.printStackTrace();
    }
    return null;
  }
  
  /** int[] - JSON Array conversion */
  public static JSONArray toJSONArray(int array[]) {
    JSONArray json = new JSONArray();
    for (int i = 0; i < array.length; i++) {
      try {
        json.put(i, array[i]);
      } catch (JSONException e) {
        e.printStackTrace();
      }
    }
    return json;
  }
  
  /** Helper method to read JSON array from input stream and converting to int[] */ 
  public static int[] getSudokuArray(InputStream is) {
    
        try {
      return toIntArray(readJSONArrayFromIS(is));
    } catch (IOException e) {
      e.printStackTrace();
    }
        return null;
  }

}

Java Source Code List