Sudoku: src/main/java/de/uapcore/sudoku/DocumentHandler.java@576e7a2861ae

     1 /*

     2  * Copyright 2013 Mike Becker. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions are met:

     6  *

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  *

    10  * 2. Redistributions in binary form must reproduce the above copyright

    11  *    notice, this list of conditions and the following disclaimer in the

    12  *    documentation and/or other materials provided with the distribution.

    13  *

    14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    15  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    17  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

    18  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    19  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    20  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    21  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    22  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    23  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    24  * POSSIBILITY OF SUCH DAMAGE.

    25  */

    27 package de.uapcore.sudoku;

    29 import java.io.*;

    30 import java.util.regex.Matcher;

    31 import java.util.regex.Pattern;

    33 /**

    34  *

    35  * @author mike

    36  */

    37 public class DocumentHandler {

    39     private String filename;

    41     public void load(Field field) throws IOException {

    42         if (!isFilenameSet()) {

    43             throw new IOException("no filename supplied");

    44         }

    45         int row = 0;

    46         try (BufferedReader in = new BufferedReader(

    47                 new InputStreamReader(new FileInputStream(filename)))) {

    48             Pattern pat = Pattern.compile("^\\s*(?:[1-9_] ){8}[1-9_]\\s*$");

    49             String line;

    50             while ((line = in.readLine()) != null) {

    51                 if (line.matches("^\\s*$")) {

    52                     continue;

    53                 }

    54                 Matcher m = pat.matcher(line);

    55                 if (m.matches()) {

    56                     String c[] = line.trim().split(" ");

    57                     if (c.length != 9) {

    58                         break;

    59                     }

    60                     for (int i = 0 ; i < 9 ; i++) {

    61                         field.setCellValue(i, row,

    62                                 c[i].equals("_") ? 0 : Integer.valueOf(c[i]));

    63                     }

    64                     row++;

    65                 } else {

    66                     break;

    67                 }

    68             }

    69             if (row != 9) {

    70                 throw new IOException("Kein Sudoku-Feld enthalten!");

    71             }

    72         }

    73         field.setAllCellsModified(false);

    74     }

    76     public void save(Field field) throws IOException {

    77         if (!isFilenameSet()) {

    78             throw new IOException("no filename supplied");

    79         }

    81         try (BufferedWriter out = new BufferedWriter(

    82                 new OutputStreamWriter(new FileOutputStream(filename)))) {

    83             for (int i = 0 ; i < 9 ; i++) {

    84                 int[] row = field.getRow(i);

    85                 for (int j = 0 ; j < 9 ; j++) {

    86                     out.append(row[j] > 0 ? Character.forDigit(row[j], 10):'_');

    87                     out.append(j == 8 ? '\n': ' ');

    88                 }

    89             }

    90         }

    91     }

    93     public void setFilename(String filename) {

    94         this.filename = filename;

    95     }

    97     public void clearFilename() {

    98         filename = null;

    99     }

   101     public boolean isFilenameSet() {

   102         return filename != null;

   103     }

   104 }

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