Subversion Repositories Applications.papyrus

/*

	Copyright (c) 2004-2006, The Dojo Foundation

	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the

	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml

*/

dojo.provide("dojo.uuid.LightweightGenerator");

dojo.uuid.LightweightGenerator = new function () {

	var HEX_RADIX = 16;

	function _generateRandomEightCharacterHexString() {

		var random32bitNumber = Math.floor((Math.random() % 1) * Math.pow(2, 32));

		var eightCharacterHexString = random32bitNumber.toString(HEX_RADIX);

		while (eightCharacterHexString.length < 8) {

			eightCharacterHexString = "0" + eightCharacterHexString;

		}

		return eightCharacterHexString;

	}

	this.generate = function (returnType) {

		var hyphen = "-";

		var versionCodeForRandomlyGeneratedUuids = "4";

		var variantCodeForDCEUuids = "8";

		var a = _generateRandomEightCharacterHexString();

		var b = _generateRandomEightCharacterHexString();

		b = b.substring(0, 4) + hyphen + versionCodeForRandomlyGeneratedUuids + b.substring(5, 8);

		var c = _generateRandomEightCharacterHexString();

		c = variantCodeForDCEUuids + c.substring(1, 4) + hyphen + c.substring(4, 8);

		var d = _generateRandomEightCharacterHexString();

		var returnValue = a + hyphen + b + hyphen + c + d;

		returnValue = returnValue.toLowerCase();

		if (returnType && (returnType != String)) {

			returnValue = new returnType(returnValue);

		}

		return returnValue;

	};

}();