249 lines
9.4 KiB
JavaScript
249 lines
9.4 KiB
JavaScript
//>>built
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define("dojox/uuid/_base", ['dojo/_base/kernel', 'dojo/_base/lang'], function(dojo){
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dojo.getObject("uuid", true, dojox);
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// Public constants:
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dojox.uuid.NIL_UUID = "00000000-0000-0000-0000-000000000000";
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dojox.uuid.version = {
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// Enumeration for the different UUID versions.
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UNKNOWN: 0,
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TIME_BASED: 1,
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DCE_SECURITY: 2,
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NAME_BASED_MD5: 3,
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RANDOM: 4,
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NAME_BASED_SHA1: 5 };
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dojox.uuid.variant = {
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// Enumeration for the different UUID variants.
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NCS: "0",
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DCE: "10",
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MICROSOFT: "110",
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UNKNOWN: "111" };
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dojox.uuid.assert = function(/*Boolean*/ booleanValue, /*String?*/ message){
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// summary:
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// Throws an exception if the assertion fails.
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// description:
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// If the asserted condition is true, this method does nothing. If the
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// condition is false, we throw an error with a error message.
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// booleanValue: Must be true for the assertion to succeed.
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// message: A string describing the assertion.
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// throws: Throws an Error if 'booleanValue' is false.
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if(!booleanValue){
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if(!message){
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message = "An assert statement failed.\n" +
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"The method dojox.uuid.assert() was called with a 'false' value.\n";
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}
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throw new Error(message);
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}
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};
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dojox.uuid.generateNilUuid = function(){
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// summary:
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// This function returns the Nil UUID: "00000000-0000-0000-0000-000000000000".
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// description:
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// The Nil UUID is described in section 4.1.7 of
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// RFC 4122: http://tools.ietf.org/html/rfc4122#section-4.1.7
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// examples:
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// var string = dojox.uuid.generateNilUuid();
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return dojox.uuid.NIL_UUID; // String
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};
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dojox.uuid.isValid = function(/*String*/ uuidString){
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// summary:
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// Returns true if the UUID was initialized with a valid value.
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uuidString = uuidString.toString();
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var valid = (dojo.isString(uuidString) &&
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(uuidString.length == 36) &&
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(uuidString == uuidString.toLowerCase()));
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if(valid){
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var arrayOfParts = uuidString.split("-");
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valid = ((arrayOfParts.length == 5) &&
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(arrayOfParts[0].length == 8) &&
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(arrayOfParts[1].length == 4) &&
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(arrayOfParts[2].length == 4) &&
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(arrayOfParts[3].length == 4) &&
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(arrayOfParts[4].length == 12));
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var HEX_RADIX = 16;
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for (var i in arrayOfParts) {
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var part = arrayOfParts[i];
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var integer = parseInt(part, HEX_RADIX);
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valid = valid && isFinite(integer);
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}
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}
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return valid; // boolean
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};
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dojox.uuid.getVariant = function(/*String*/ uuidString){
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// summary:
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// Returns a variant code that indicates what type of UUID this is.
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// Returns one of the enumerated dojox.uuid.variant values.
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// example:
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// var variant = dojox.uuid.getVariant("3b12f1df-5232-4804-897e-917bf397618a");
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// dojox.uuid.assert(variant == dojox.uuid.variant.DCE);
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// example:
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// "3b12f1df-5232-4804-897e-917bf397618a"
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// ^
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// |
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// (variant "10__" == DCE)
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if(!dojox.uuid._ourVariantLookupTable){
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var variant = dojox.uuid.variant;
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var lookupTable = [];
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lookupTable[0x0] = variant.NCS; // 0000
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lookupTable[0x1] = variant.NCS; // 0001
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lookupTable[0x2] = variant.NCS; // 0010
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lookupTable[0x3] = variant.NCS; // 0011
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lookupTable[0x4] = variant.NCS; // 0100
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lookupTable[0x5] = variant.NCS; // 0101
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lookupTable[0x6] = variant.NCS; // 0110
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lookupTable[0x7] = variant.NCS; // 0111
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lookupTable[0x8] = variant.DCE; // 1000
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lookupTable[0x9] = variant.DCE; // 1001
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lookupTable[0xA] = variant.DCE; // 1010
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lookupTable[0xB] = variant.DCE; // 1011
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lookupTable[0xC] = variant.MICROSOFT; // 1100
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lookupTable[0xD] = variant.MICROSOFT; // 1101
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lookupTable[0xE] = variant.UNKNOWN; // 1110
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lookupTable[0xF] = variant.UNKNOWN; // 1111
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dojox.uuid._ourVariantLookupTable = lookupTable;
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}
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uuidString = uuidString.toString();
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var variantCharacter = uuidString.charAt(19);
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var HEX_RADIX = 16;
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var variantNumber = parseInt(variantCharacter, HEX_RADIX);
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dojox.uuid.assert((variantNumber >= 0) && (variantNumber <= 16));
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return dojox.uuid._ourVariantLookupTable[variantNumber]; // dojox.uuid.variant
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};
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dojox.uuid.getVersion = function(/*String*/ uuidString){
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// summary:
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// Returns a version number that indicates what type of UUID this is.
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// Returns one of the enumerated dojox.uuid.version values.
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// example:
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// var version = dojox.uuid.getVersion("b4308fb0-86cd-11da-a72b-0800200c9a66");
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// dojox.uuid.assert(version == dojox.uuid.version.TIME_BASED);
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// exceptions:
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// Throws an Error if this is not a DCE Variant UUID.
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var errorMessage = "dojox.uuid.getVersion() was not passed a DCE Variant UUID.";
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dojox.uuid.assert(dojox.uuid.getVariant(uuidString) == dojox.uuid.variant.DCE, errorMessage);
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uuidString = uuidString.toString();
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// "b4308fb0-86cd-11da-a72b-0800200c9a66"
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// ^
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// |
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// (version 1 == TIME_BASED)
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var versionCharacter = uuidString.charAt(14);
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var HEX_RADIX = 16;
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var versionNumber = parseInt(versionCharacter, HEX_RADIX);
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return versionNumber; // dojox.uuid.version
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};
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dojox.uuid.getNode = function(/*String*/ uuidString){
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// summary:
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// If this is a version 1 UUID (a time-based UUID), getNode() returns a
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// 12-character string with the "node" or "pseudonode" portion of the UUID,
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// which is the rightmost 12 characters.
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// exceptions:
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// Throws an Error if this is not a version 1 UUID.
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var errorMessage = "dojox.uuid.getNode() was not passed a TIME_BASED UUID.";
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dojox.uuid.assert(dojox.uuid.getVersion(uuidString) == dojox.uuid.version.TIME_BASED, errorMessage);
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uuidString = uuidString.toString();
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var arrayOfStrings = uuidString.split('-');
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var nodeString = arrayOfStrings[4];
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return nodeString; // String (a 12-character string, which will look something like "917bf397618a")
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};
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dojox.uuid.getTimestamp = function(/*String*/ uuidString, /*String?*/ returnType){
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// summary:
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// If this is a version 1 UUID (a time-based UUID), this method returns
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// the timestamp value encoded in the UUID. The caller can ask for the
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// timestamp to be returned either as a JavaScript Date object or as a
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// 15-character string of hex digits.
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// returnType: Any of these five values: "string", String, "hex", "date", Date
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// returns:
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// Returns the timestamp value as a JavaScript Date object or a 15-character string of hex digits.
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// examples:
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// var uuidString = "b4308fb0-86cd-11da-a72b-0800200c9a66";
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// var date, string, hexString;
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// date = dojox.uuid.getTimestamp(uuidString); // returns a JavaScript Date
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// date = dojox.uuid.getTimestamp(uuidString, Date); //
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// string = dojox.uuid.getTimestamp(uuidString, String); // "Mon, 16 Jan 2006 20:21:41 GMT"
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// hexString = dojox.uuid.getTimestamp(uuidString, "hex"); // "1da86cdb4308fb0"
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// exceptions:
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// Throws an Error if this is not a version 1 UUID.
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var errorMessage = "dojox.uuid.getTimestamp() was not passed a TIME_BASED UUID.";
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dojox.uuid.assert(dojox.uuid.getVersion(uuidString) == dojox.uuid.version.TIME_BASED, errorMessage);
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uuidString = uuidString.toString();
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if(!returnType){returnType = null};
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switch(returnType){
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case "string":
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case String:
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return dojox.uuid.getTimestamp(uuidString, Date).toUTCString(); // String (e.g. "Mon, 16 Jan 2006 20:21:41 GMT")
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break;
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case "hex":
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// Return a 15-character string of hex digits containing the
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// timestamp for this UUID, with the high-order bits first.
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var arrayOfStrings = uuidString.split('-');
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var hexTimeLow = arrayOfStrings[0];
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var hexTimeMid = arrayOfStrings[1];
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var hexTimeHigh = arrayOfStrings[2];
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// Chop off the leading "1" character, which is the UUID
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// version number for time-based UUIDs.
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hexTimeHigh = hexTimeHigh.slice(1);
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var timestampAsHexString = hexTimeHigh + hexTimeMid + hexTimeLow;
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dojox.uuid.assert(timestampAsHexString.length == 15);
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return timestampAsHexString; // String (e.g. "1da86cdb4308fb0")
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break;
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case null: // no returnType was specified, so default to Date
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case "date":
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case Date:
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// Return a JavaScript Date object.
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var GREGORIAN_CHANGE_OFFSET_IN_HOURS = 3394248;
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var HEX_RADIX = 16;
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var arrayOfParts = uuidString.split('-');
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var timeLow = parseInt(arrayOfParts[0], HEX_RADIX);
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var timeMid = parseInt(arrayOfParts[1], HEX_RADIX);
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var timeHigh = parseInt(arrayOfParts[2], HEX_RADIX);
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var hundredNanosecondIntervalsSince1582 = timeHigh & 0x0FFF;
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hundredNanosecondIntervalsSince1582 <<= 16;
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hundredNanosecondIntervalsSince1582 += timeMid;
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// What we really want to do next is shift left 32 bits, but the
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// result will be too big to fit in an int, so we'll multiply by 2^32,
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// and the result will be a floating point approximation.
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hundredNanosecondIntervalsSince1582 *= 0x100000000;
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hundredNanosecondIntervalsSince1582 += timeLow;
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var millisecondsSince1582 = hundredNanosecondIntervalsSince1582 / 10000;
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// Again, this will be a floating point approximation.
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// We can make things exact later if we need to.
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var secondsPerHour = 60 * 60;
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var hoursBetween1582and1970 = GREGORIAN_CHANGE_OFFSET_IN_HOURS;
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var secondsBetween1582and1970 = hoursBetween1582and1970 * secondsPerHour;
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var millisecondsBetween1582and1970 = secondsBetween1582and1970 * 1000;
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var millisecondsSince1970 = millisecondsSince1582 - millisecondsBetween1582and1970;
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var timestampAsDate = new Date(millisecondsSince1970);
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return timestampAsDate; // Date
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break;
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default:
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// we got passed something other than a valid returnType
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dojox.uuid.assert(false, "dojox.uuid.getTimestamp was not passed a valid returnType: " + returnType);
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break;
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}
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};
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return dojox.uuid;
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});
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