Thu, 31 Jan 2013 18:44:44 +0100
added solving algorithm
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.BufferedReader;
30 import java.io.BufferedWriter;
31 import java.io.FileInputStream;
32 import java.io.FileOutputStream;
33 import java.io.IOException;
34 import java.io.InputStreamReader;
35 import java.io.OutputStreamWriter;
36 import java.util.regex.Matcher;
37 import java.util.regex.Pattern;
39 /**
40 *
41 * @author mike
42 */
43 public class DocumentHandler {
45 private String filename;
47 public void load(Field field) throws IOException {
48 if (!isFilenameSet()) {
49 throw new IOException("no filename supplied");
50 }
51 int row = 0;
52 try (BufferedReader in = new BufferedReader(
53 new InputStreamReader(new FileInputStream(filename)))) {
54 Pattern pat = Pattern.compile("^\\s*(?:[1-9_] ){8}[1-9_]\\s*$");
55 String line;
56 while ((line = in.readLine()) != null) {
57 if (line.matches("^\\s*$")) {
58 continue;
59 }
60 Matcher m = pat.matcher(line);
61 if (m.matches()) {
62 String c[] = line.trim().split(" ");
63 if (c.length != 9) {
64 break;
65 }
66 for (int i = 0 ; i < 9 ; i++) {
67 field.setCellValue(i, row,
68 c[i].equals("_") ? 0 : Integer.valueOf(c[i]));
69 }
70 row++;
71 } else {
72 break;
73 }
74 }
75 if (row != 9) {
76 throw new IOException("Kein Sudoku-Feld enthalten!");
77 }
78 }
79 field.setAllCellsModified(false);
80 }
82 public void save(Field field) throws IOException {
83 if (!isFilenameSet()) {
84 throw new IOException("no filename supplied");
85 }
87 try (BufferedWriter out = new BufferedWriter(
88 new OutputStreamWriter(new FileOutputStream(filename)))) {
89 for (int i = 0 ; i < 9 ; i++) {
90 int[] row = field.getRow(i);
91 for (int j = 0 ; j < 9 ; j++) {
92 out.append(row[j] > 0 ? Character.forDigit(row[j], 10):'_');
93 out.append(j == 8 ? '\n': ' ');
94 }
95 }
96 }
97 }
99 public void setFilename(String filename) {
100 this.filename = filename;
101 }
103 public void clearFilename() {
104 filename = null;
105 }
107 public boolean isFilenameSet() {
108 return filename != null;
109 }
110 }