package org.activityinfo.legacy.shared.type;
/*
* #%L
* ActivityInfo Server
* %%
* Copyright (C) 2009 - 2013 UNICEF
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/gpl-3.0.html>.
* #L%
*/
/*
File: Math.uuid.js
Version: 1.3
Change History:
v1.0 - first release
v1.1 - less code and 2x performance boost (by minimizing calls to Math.random())
v1.2 - Add support for generating non-standard uuids of arbitrary length
v1.3 - Fixed IE7 bug (can't use []'s to access string chars. Thanks, Brian R.)
v1.4 - Changed method to be "Math.uuid". Added support for radix argument. Use module pattern for better
encapsulation.
Latest version: http://www.broofa.com/Tools/Math.uuid.js
Information: http://www.broofa.com/blog/?p=151
Contact: robert@broofa.com
----
Copyright (c) 2008, Robert Kieffer
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution.
* Neither the name of Robert Kieffer nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
public final class UUID {
private UUID() {
}
private static final char[] CHARS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".toCharArray();
/**
* Generate a random uuid of the specified length. Example: uuid(15) returns
* "VcydxgltxrVZSTV"
*
* @param len the desired number of characters
*/
public static String uuid(int len) {
return uuid(len, CHARS.length);
}
/**
* Generate a random uuid of the specified length, and radix. Examples:
* <ul>
* <li>uuid(8, 2) returns "01001010" (8 character ID, base=2)
* <li>uuid(8, 10) returns "47473046" (8 character ID, base=10)
* <li>uuid(8, 16) returns "098F4D35" (8 character ID, base=16)
* </ul>
*
* @param len the desired number of characters
* @param radix the number of allowable values for each character (must be <=
* 62)
*/
public static String uuid(int len, int radix) {
if (radix > CHARS.length) {
throw new IllegalArgumentException();
}
char[] uuid = new char[len];
// Compact form
for (int i = 0; i < len; i++) {
uuid[i] = CHARS[(int) (Math.random() * radix)];
}
return new String(uuid);
}
/**
* Generate a RFC4122, version 4 ID. Example:
* "92329D39-6F5C-4520-ABFC-AAB64544E172"
*/
public static String uuid() {
char[] uuid = new char[36];
int r;
// rfc4122 requires these characters
uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
uuid[14] = '4';
// Fill in random data. At i==19 set the high bits of clock sequence as
// per rfc4122, sec. 4.1.5
for (int i = 0; i < 36; i++) {
if (uuid[i] == 0) {
r = (int) (Math.random() * 16);
uuid[i] = CHARS[(i == 19) ? (r & 0x3) | 0x8 : r & 0xf];
}
}
return new String(uuid);
}
}