-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathBlock.java
More file actions
347 lines (312 loc) · 11.9 KB
/
Block.java
File metadata and controls
347 lines (312 loc) · 11.9 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
package FileSystem;
import javax.swing.*;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
/**
* Created by hongjiayong on 16/6/7.
*/
public class Block {
private String blockName;
private File blockFile;
private File blockBitMap;
private File recover;
private File fcbFile;
private FileWriter bitWriter;
private FileWriter recoverWriter;
private FileWriter fcbWriter;
private int fileNum;
private double space;
public int [][] bitmap = new int[32][32];
private Map<String, int[][] > filesBit = new HashMap<String, int[][]>();
private ArrayList<File> files = new ArrayList<File>();
public Block(String name, File file, boolean rec) throws IOException {
blockName = name;
blockFile = file;
blockBitMap = new File(blockFile.getPath() + File.separator + "BitMap&&Fat.txt");
recover = new File(blockFile.getPath() + File.separator + "recover.txt");
fcbFile = new File(blockFile.getPath() + File.separator + "FCB.txt");
if (!rec) {
space = 0;
fileNum = 0;
blockFile.mkdir();
blockBitMap.createNewFile();
bitWriter = new FileWriter(blockBitMap);
for (int i = 0; i < 32; i++) {
for (int k = 0; k < 32; k++) {
bitmap[i][k] = 0;
bitWriter.write("0");
}
bitWriter.write("\r\n");
}
bitWriter.flush();
recover.createNewFile();
recoverWriter = new FileWriter(recover);
recoverWriter.write(String.valueOf(space) + "\r\n");
recoverWriter.write(String.valueOf(fileNum) + "\r\n");
for (int i = 0; i < 32; i++) {
for (int k = 0; k < 32; k++) {
recoverWriter.write("0\r\n");
}
}
recoverWriter.flush();
fcbFile.createNewFile();
}else{
try {
BufferedReader reader = new BufferedReader(new FileReader(recover));
space = Double.parseDouble(reader.readLine());
fileNum = Integer.parseInt(reader.readLine());
for (int i = 0; i < 32; i++) {
for (int k = 0; k < 32; k++) {
if (Integer.parseInt(reader.readLine()) == 0) {
bitmap[i][k] = 0;
} else {
bitmap[i][k] = 1;
}
}
}
String temp;
while ((temp = reader.readLine()) != null) {
File myFile = new File(blockFile.getPath() + File.separator + temp);
files.add(myFile);
int[][] tempBit = new int[32][32];
for (int i = 0; i < 32; i++) {
for (int k = 0; k < 32; k++) {
if (Integer.parseInt(reader.readLine()) == 0) {
tempBit[i][k] = 0;
} else {
tempBit[i][k] = 1;
}
}
}
filesBit.put(myFile.getName(), tempBit);
}
reader.close();
}catch (Exception e){
JOptionPane.showMessageDialog(null, "The files aren't compelete. " +
"You can choose another place or delete \"myFileSystem\" " +
"in this dir and run this again!", "Error", JOptionPane.ERROR_MESSAGE);
System.exit(0);
}
}
}
public File getBlockFile(){
return blockFile;
}
public void putFCB(File file, double capacity) throws IOException {
fcbWriter = new FileWriter(fcbFile, true); //×·¼ÓдÈëFCB
fcbWriter.write("Name: " + file.getName() + "\r\n");
fcbWriter.write("Path: " + file.getPath() + "\r\n");
fcbWriter.write("Capacity: " + String.valueOf(capacity) + "\r\n");
String ctime = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(new Date(file.lastModified()));
fcbWriter.write("Date last updated: " + ctime + "\r\n");
fcbWriter.write("-------------------------- ------------------------------\r\n");
fcbWriter.close();
}
public void rewriteBitMap() throws IOException {
bitWriter = new FileWriter(blockBitMap);
bitWriter.write("");
for (int i = 0; i < 32;i++){
for (int k = 0; k < 32; k++){
if (bitmap[i][k] == 0){
bitWriter.write("0");
}else{
bitWriter.write("1");
}
}
bitWriter.write("\r\n");
}
for (int i = 0; i < files.size(); i++){
bitWriter.write(files.get(i).getName() + ":");
for (int k = 0; k < 32; k++){
for (int j = 0; j < 32; j++){
try {
if (filesBit.get(files.get(i).getName())[k][j] == 1) {
bitWriter.write(String.valueOf(k * 32 + j) + " ");
}
}catch (Exception e){
System.out.println("wrong");
}
}
}
bitWriter.write("\r\n");
}
bitWriter.flush();
}
public void rewriteRecoverWriter() throws IOException{
recoverWriter = new FileWriter(recover);
recoverWriter.write("");
recoverWriter.write(String.valueOf(space) + "\r\n");
recoverWriter.write(String.valueOf(fileNum) + "\r\n");
for (int i = 0; i < 32; i++){
for (int k = 0; k < 32; k++){
if (bitmap[i][k] == 0){
recoverWriter.write("0\r\n");
}else{
recoverWriter.write("1\r\n");
}
}
}
for (int i = 0; i < files.size(); i++){
recoverWriter.write(files.get(i).getName() + "\r\n");
int [][] bitTemp = filesBit.get(files.get(i).getName());
for (int k = 0; k < 32; k++){
for (int j = 0; j < 32; j++){
if (bitTemp[k][j] == 0){
recoverWriter.write("0\r\n");
}else {
recoverWriter.write("1\r\n");
}
}
}
}
recoverWriter.flush();
}
public boolean createFile(File file, double capacity) throws IOException {
files.add(file);
file.createNewFile();
int cap[][] = new int[32][32];
for (int i = 0; i < 32; i++){
for (int k = 0; k < 32; k++)
cap[i][k] = 0;
}
BufferedReader in = new BufferedReader(new FileReader(blockBitMap));
int count = (int) capacity;
for (int i = 0; i < 32; i++){
String line = in.readLine();
for (int k = 0; k < 32; k++){
if (count > 0) {
if (line.charAt(k) == '0') {
count--;
cap[i][k] = 1;
bitmap[i][k] = 1;
}
}
}
}
if (count > 0){
JOptionPane.showMessageDialog(null, "Insufficient memory!!", "Fail", JOptionPane.ERROR_MESSAGE);
file.delete();
for (int i = 0; i < 32; i++){
for (int k = 0; k < 32; k++){
if (cap[i][k] == 1){
bitmap[i][k] = 0;
}
}
}
return false;
}else{
fileNum++;
space += capacity;
filesBit.put(file.getName(), cap);
rewriteBitMap();
rewriteRecoverWriter();
putFCB(file, capacity);
return true;
}
}
public boolean deleteFile(File file, double capacity){
if (file.getName().equals("CÅÌ") || file.getName().equals("DÅÌ") || file.getName().equals("EÅÌ") || file.getName().equals("FÅÌ")
|| file.getName().equals("FCB.txt") || file.getName().equals("BitMap&&Fat.txt")|| file.getName().equals("recover.txt")){
JOptionPane.showMessageDialog(null, "The dir is protected!!", "Access fail", JOptionPane.ERROR_MESSAGE);
return false;
}
try{
if (file.isFile()){
try {
file.delete();
}catch (Exception e){
e.printStackTrace();
}
space -= capacity;
fileNum--;
int[][] fileStore = filesBit.get(file.getName());
for (int i = 0; i < 32; i++){
for (int k = 0; k < 32; k++){
if (bitmap[i][k] == 1 && fileStore[i][k] == 1){
bitmap[i][k] = 0;
}
}
}
filesBit.remove(file.getName());
for (int i = 0; i < files.size(); i++){
if (files.get(i).getName().equals(file.getName())){
files.remove(i);
break;
}
}
}else{
File [] files = file.listFiles();
for(File myFile : files){
deleteFile(myFile, capacity);
}
while(file.exists()) {
file.delete();
}
}
return true;
}catch (Exception e){
System.out.println("fail");
return false;
}
}
public boolean renameFile(File file, String name, double capacity) throws IOException {
String oldName = file.getName();
int[][] tempBit = filesBit.get(oldName);
String c = file.getParent();
File mm;
if(file.isFile()) {
mm = new File(c + File.separator + name + ".txt");
if (file.renameTo(mm)){
file = mm;
filesBit.remove(oldName);
filesBit.put(file.getName(), tempBit);
// Put FCB
putFCB(file, capacity);
for (int i = 0; i < files.size(); i++){
if (files.get(i).getName().equals(oldName)){
files.remove(i);
files.add(file);
break;
}
}
rewriteBitMap();
rewriteRecoverWriter();
return true;
}else{
return false;
}
}
else {
mm = new File(c + File.separator + name);
file.renameTo(mm);
return true;
}
}
public String getBlockName(){
return blockName;
}
public int getFileNum() {
return fileNum;
}
public double getSpace() {
return space;
}
// Get space
public static double getSpace(File file){
double space = 0;
try {
BufferedReader reader = new BufferedReader(new FileReader(file));
reader.readLine();
space = Double.parseDouble(reader.readLine());
if (space > 1024){
space = 0.0;
}
reader.close();
} catch (Exception e){};
return space;
}
}