1 package org.slf4j.migrator.helper;
2
3 import java.util.Random;
4
5 public class RandomHelper {
6
7 private Random random = new Random(100);
8 final char folderSeparator;
9
10 RandomHelper(char folderSeparator) {
11 this.folderSeparator = folderSeparator;
12 }
13
14 private String randomString(int len) {
15 StringBuffer buf = new StringBuffer();
16 for (int i = 0; i < len; i++) {
17 int offset = random.nextInt(26);
18 char c = (char) ('a' + offset);
19 buf.append(c);
20 }
21 return buf.toString();
22 }
23
24 int nextInt(int n) {
25 return random.nextInt(n);
26 }
27
28 String buildRandomFileName(int averageNodeLength, int totalLength) {
29 StringBuffer buf = new StringBuffer();
30 int MAX_NODE_LENGTH = averageNodeLength * 2;
31 while (buf.length() < totalLength) {
32 int remaining = totalLength - buf.length();
33 int currentNodeLength;
34 if (remaining > MAX_NODE_LENGTH) {
35 currentNodeLength = random.nextInt(MAX_NODE_LENGTH) + 1;
36 buf.append(randomString(currentNodeLength));
37 buf.append('/');
38 } else {
39 currentNodeLength = remaining;
40 buf.append(randomString(currentNodeLength));
41 }
42 }
43 return buf.toString();
44 }
45
46 }