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 /**
 * Provides Y.JSON.stringify method for converting objects to JSON strings.
 *
 * @module json
 * @submodule json-stringify
 * @for JSON
 * @static
 */
 var COLON = ':',
 _JSON = Y.config.global.JSON;
 
 Y.mix(Y.namespace('JSON'), {
 /**
 * Serializes a Date instance as a UTC date string. Used internally by
 * stringify. Override this method if you need Dates serialized in a
 * different format.
 *
 * @method dateToString
 * @param d {Date} The Date to serialize
 * @return {String} stringified Date in UTC format YYYY-MM-DDTHH:mm:SSZ
 * @deprecated Use a replacer function
 * @static
 */
 dateToString: function (d) {
 function _zeroPad(v) {
 return v < 10 ? '0' + v : v;
 }
 
 return d.getUTCFullYear() + '-' +
 _zeroPad(d.getUTCMonth() + 1) + '-' +
 _zeroPad(d.getUTCDate()) + 'T' +
 _zeroPad(d.getUTCHours()) + COLON +
 _zeroPad(d.getUTCMinutes()) + COLON +
 _zeroPad(d.getUTCSeconds()) + 'Z';
 },
 
 /**
 * <p>Converts an arbitrary value to a JSON string representation.</p>
 *
 * <p>Objects with cyclical references will trigger an exception.</p>
 *
 * <p>If a whitelist is provided, only matching object keys will be
 * included. Alternately, a replacer function may be passed as the
 * second parameter. This function is executed on every value in the
 * input, and its return value will be used in place of the original value.
 * This is useful to serialize specialized objects or class instances.</p>
 *
 * <p>If a positive integer or non-empty string is passed as the third
 * parameter, the output will be formatted with carriage returns and
 * indentation for readability. If a String is passed (such as "\t") it
 * will be used once for each indentation level. If a number is passed,
 * that number of spaces will be used.</p>
 *
 * @method stringify
 * @param o {MIXED} any arbitrary value to convert to JSON string
 * @param w {Array|Function} (optional) whitelist of acceptable object
 * keys to include, or a replacer function to modify the
 * raw value before serialization
 * @param ind {Number|String} (optional) indentation character or depth of
 * spaces to format the output.
 * @return {string} JSON string representation of the input
 * @static
 */
 stringify: function () {
 return _JSON.stringify.apply(_JSON, arguments);
 },
 
 /**
 * <p>Number of occurrences of a special character within a single call to
 * stringify that should trigger promotion of that character to a dedicated
 * preprocess step for future calls. This is only used in environments
 * that don't support native JSON, or when useNativeJSONStringify is set to
 * false.</p>
 *
 * <p>So, if set to 50 and an object is passed to stringify that includes
 * strings containing the special character \x07 more than 50 times,
 * subsequent calls to stringify will process object strings through a
 * faster serialization path for \x07 before using the generic, slower,
 * replacement process for all special characters.</p>
 *
 * <p>To prime the preprocessor cache, set this value to 1, then call
 * <code>Y.JSON.stringify("<em>(all special characters to
 * cache)</em>");</code>, then return this setting to a more conservative
 * value.</p>
 *
 * <p>Special characters \ " \b \t \n \f \r are already cached.</p>
 *
 * @property charCacheThreshold
 * @static
 * @default 100
 * @type {Number}
 */
 charCacheThreshold: 100
 });