| /** |
| * Copyright (c) 2004-2011 QOS.ch |
| * All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sublicense, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| */ |
| package org.slf4j.migrator.helper; |
| |
| import java.util.Random; |
| |
| public class RandomHelper { |
| |
| private Random random = new Random(100); |
| final char folderSeparator; |
| |
| RandomHelper(char folderSeparator) { |
| this.folderSeparator = folderSeparator; |
| } |
| |
| private String randomString(int len) { |
| StringBuilder buf = new StringBuilder(); |
| for (int i = 0; i < len; i++) { |
| int offset = random.nextInt(26); |
| char c = (char) ('a' + offset); |
| buf.append(c); |
| } |
| return buf.toString(); |
| } |
| |
| int nextInt(int n) { |
| return random.nextInt(n); |
| } |
| |
| String buildRandomFileName(int averageNodeLength, int totalLength) { |
| StringBuilder buf = new StringBuilder(); |
| int MAX_NODE_LENGTH = averageNodeLength * 2; |
| while (buf.length() < totalLength) { |
| int remaining = totalLength - buf.length(); |
| int currentNodeLength; |
| if (remaining > MAX_NODE_LENGTH) { |
| currentNodeLength = random.nextInt(MAX_NODE_LENGTH) + 1; |
| buf.append(randomString(currentNodeLength)); |
| buf.append('/'); |
| } else { |
| currentNodeLength = remaining; |
| buf.append(randomString(currentNodeLength)); |
| } |
| } |
| return buf.toString(); |
| } |
| |
| } |