/*
http://www.JSON.org/json2.js
2008-03-24
Public Domain.
NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
See http://www.JSON.org/js.html
modified by Rick Strahl to support MS AJAX style
date formats
*/
if (!this.JSON2) {
// Create a JSON object only if one does not already exist. We create the
// object in a closure to avoid global variables.
JSON2 = function () {
function f(n) { // Format integers to have at least two digits.
return n < 10 ? '0' + n : n;
}
//*** RAS - removed date .toJSON for MS Ajax - string double encodes otherwise
// Date.prototype.toJSON = function () {
//// Eventually, this method will be based on the date.toISOString method.
// 
// // RAS MODIFIED: Return MS AJAX Style dates
// var xx = '"\/Date(' + this.getTime() + ')\/"'; 
// return xx;
//// return this.getUTCFullYear() + '-' +
//// f(this.getUTCMonth() + 1) + '-' +
//// f(this.getUTCDate()) + 'T' +
//// f(this.getUTCHours()) + ':' +
//// f(this.getUTCMinutes()) + ':' +
//// f(this.getUTCSeconds()) + 'Z';
// };
var escapeable = /["\\\x00-\x1f\x7f-\x9f]/g,
gap,
indent,
meta = { // table of character substitutions
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
'\f': '\\f',
'\r': '\\r',
'"' : '\\"',
'\\': '\\\\'
},
rep;
function quote(string) {
// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.
return escapeable.test(string) ?
'"' + string.replace(escapeable, function (a) {
var c = meta[a];
if (typeof c === 'string') {
return c;
}
c = a.charCodeAt();
return '\\u00' + Math.floor(c / 16).toString(16) +
(c % 16).toString(16);
}) + '"' :
'"' + string + '"';
}
function str(key, holder) {
// Produce a string from holder[key].
var i, // The loop counter.
k, // The member key.
v, // The member value.
length,
mind = gap,
partial,
value = holder[key];
// If the value has a toJSON method, call it to obtain a replacement value.
if (value && typeof value === 'object' &&
typeof value.toJSON === 'function') { 
value = value.toJSON(key);
}
// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.
if (typeof rep === 'function') {
value = rep.call(holder, key, value);
}
// What happens next depends on the value's type.
switch (typeof value) { 
case 'string':
return quote(value);
case 'number':
// JSON numbers must be finite. Encode non-finite numbers as null.
return isFinite(value) ? String(value) : 'null';
case 'boolean':
case 'null':
// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce 'null'. The case is included here in
// the remote chance that this gets fixed someday.
return String(value);
// If the type is 'object', we might be dealing with an object or an array or
// null.
case 'object':
// Due to a specification blunder in ECMAScript, typeof null is 'object',
// so watch out for that case.
if (!value) {
return 'null';
}
// *** RAS - MS AJAX style date encoding
if (value.toUTCString)
{
var xx = '"\\/Date(' + value.getTime() + ')\\/"'; 
return xx;
}
// Make an array to hold the partial results of stringifying this object value.
gap += indent;
partial = [];
// If the object has a dontEnum length property, we'll treat it as an array.
if (typeof value.length === 'number' &&
!(value.propertyIsEnumerable('length'))) {
// The object is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.
length = value.length;
for (i = 0; i < length; i += 1) {
partial[i] = str(i, value) || 'null';
}
// Join all of the elements together, separated with commas, and wrap them in
// brackets.
v = partial.length === 0 ? '[]' :
gap ? '[\n' + gap + partial.join(',\n' + gap) +
'\n' + mind + ']' :
'[' + partial.join(',') + ']';
gap = mind;
return v;
}
// If the replacer is an array, use it to select the members to be stringified.
if (typeof rep === 'object') {
length = rep.length;
for (i = 0; i < length; i += 1) {
k = rep[i];
if (typeof k === 'string') {
v = str(k, value, rep);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
} else {
// Otherwise, iterate through all of the keys in the object.
for (k in value) {
v = str(k, value, rep);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
// Join all of the member texts together, separated with commas,
// and wrap them in braces.
v = partial.length === 0 ? '{}' :
gap ? '{\n' + gap + partial.join(',\n' + gap) +
'\n' + mind + '}' :
'{' + partial.join(',') + '}';
gap = mind;
return v;
}
}
// Return the JSON object containing the stringify, parse, and quote methods.
return {
stringify: function (value, replacer, space) {
// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.
var i;
gap = '';
indent = '';
if (space) {
// If the space parameter is a number, make an indent string containing that
// many spaces.
if (typeof space === 'number') {
for (i = 0; i < space; i += 1) {
indent += ' ';
}
// If the space parameter is a string, it will be used as the indent string.
} else if (typeof space === 'string') {
indent = space;
}
}
// If there is no replacer parameter, use the default replacer.
if (!replacer) {
rep = function (key, value) {
if (!Object.hasOwnProperty.call(this, key)) {
return undefined;
}
return value;
};
// The replacer can be a function or an array. Otherwise, throw an error.
} else if (typeof replacer === 'function' ||
(typeof replacer === 'object' &&
typeof replacer.length === 'number')) {
rep = replacer;
} else {
throw new Error('JSON.stringify');
}
// Make a fake root object containing our value under the key of ''.
// Return the result of stringifying the value.
return str('', {'': value});
},
parse: function (text, reviver) {
// The parse method takes a text and an optional reviver function, and returns
// a JavaScript value if the text is a valid JSON text.
var j;
function walk(holder, key) {
// The walk method is used to recursively walk the resulting structure so
// that modifications can be made.
var k, v, value = holder[key];
if (value && typeof value === 'object') {
for (k in value) {
if (Object.hasOwnProperty.call(value, k)) {
v = walk(value, k);
if (v !== undefined) {
value[k] = v;
} else {
delete value[k];
}
}
}
}
return reviver.call(holder, key, value);
}
// Parsing happens in three stages. In the first stage, we run the text against
// regular expressions that look for non-JSON patterns. We are especially
// concerned with '()' and 'new' because they can cause invocation, and '='
// because it can cause mutation. But just to be safe, we want to reject all
// unexpected forms.
// We split the first stage into 4 regexp operations in order to work around
// crippling inefficiencies in IE's and Safari's regexp engines. First we
// replace all backslash pairs with '@' (a non-JSON character). Second, we
// replace all simple value tokens with ']' characters. Third, we delete all
// open brackets that follow a colon or comma or that begin the text. Finally,
// we look to see that the remaining characters are only whitespace or ']' or
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
if (/^[\],:{}\s]*$/.test(text.replace(/\\["\\\/bfnrtu]/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
// In the second stage we use the eval function to compile the text into a
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
// in JavaScript: it can begin a block or an object literal. We wrap the text
// in parens to eliminate the ambiguity.
// *** RAS Update: Fix up Dates: ISO and MS AJAX format support 
var regEx = /(\"\d{4}-\d{2}-\d{2}T\d{2}:\d{2}.*?\")|(\"\\*\/Date\(.*?\)\\*\/")/g;
text = text.replace(regEx,this.regExDate);
// *** End RAS Update
j = eval('(' + text + ')');
// In the optional third stage, we recursively walk the new structure, passing
// each name/value pair to a reviver function for possible transformation.
return typeof reviver === 'function' ?
walk({'': j}, '') : j;
}
// If the text is not JSON parseable, then a is thrown.
throw new SyntaxError('JSON.parse');
},
// *** RAS Update: RegEx handler for dates ISO and MS AJAX style
regExDate: function(str,p1, p2,offset,s) 
{ 
str = str.substring(1).replace('"','');
var date = str;
// MS Ajax date: /Date(19834141)/
if (/\/Date(.*)\//.test(str)) { 
str = str.match(/Date\((.*?)\)/)[1]; 
date = "new Date(" + parseInt(str) + ")";
}
else { // ISO Date 2007-12-31T23:59:59Z 
var matches = str.split( /[-,:,T,Z]/); 
matches[1] = (parseInt(matches[1],0)-1).toString(); 
date = "new Date(Date.UTC(" + matches.join(",") + "))"; 
} 
return date;
},
quote: quote
};
}();
}