r9706 - helma-ng/trunk/modules/core
[email protected] Mon, 4 May 2009 21:12:19 +0200 (CEST)
| Newsgroups | gmane.comp.java.helma.cvs |
|---|---|
| Message-ID | <20090504191219.6E2933D0D6@mia> |
Author: hannes
Date: 2009-05-04 21:12:19 +0200 (Mon, 04 May 2009)
New Revision: 9706
Modified:
helma-ng/trunk/modules/core/json2.js
Log:
Update to new json2 snapshot dated 2009-04-16
Details at http://dev.helma.org/trac/helma/changeset/9706
Modified: helma-ng/trunk/modules/core/json2.js
===================================================================
--- helma-ng/trunk/modules/core/json2.js 2009-05-04 14:34:19 UTC (rev 9705)
+++ helma-ng/trunk/modules/core/json2.js 2009-05-04 19:12:19 UTC (rev 9706)
@@ -1,31 +1,178 @@
/*
- json2.js
- 2008-03-14
+ http://www.JSON.org/json2.js
+ 2009-04-16
- Public Domain
+ Public Domain.
- No warranty expressed or implied. Use at your own risk.
+ NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
See http://www.JSON.org/js.html
+ This file creates a global JSON object containing two methods: stringify
+ and parse.
+
+ JSON.stringify(value, replacer, space)
+ value any JavaScript value, usually an object or array.
+
+ replacer an optional parameter that determines how object
+ values are stringified for objects. It can be a
+ function or an array of strings.
+
+ space an optional parameter that specifies the indentation
+ of nested structures. If it is omitted, the text will
+ be packed without extra whitespace. If it is a number,
+ it will specify the number of spaces to indent at each
+ level. If it is a string (such as '\t' or ' '),
+ it contains the characters used to indent at each level.
+
+ This method produces a JSON text from a JavaScript value.
+
+ When an object value is found, if the object contains a toJSON
+ method, its toJSON method will be called and the result will be
+ stringified. A toJSON method does not serialize: it returns the
+ value represented by the name/value pair that should be serialized,
+ or undefined if nothing should be serialized. The toJSON method
+ will be passed the key associated with the value, and this will be
+ bound to the object holding the key.
+
+ For example, this would serialize Dates as ISO strings.
+
+ Date.prototype.toJSON = function (key) {
+ function f(n) {
+ // Format integers to have at least two digits.
+ return n < 10 ? '0' + n : n;
+ }
+
+ return this.getUTCFullYear() + '-' +
+ f(this.getUTCMonth() + 1) + '-' +
+ f(this.getUTCDate()) + 'T' +
+ f(this.getUTCHours()) + ':' +
+ f(this.getUTCMinutes()) + ':' +
+ f(this.getUTCSeconds()) + 'Z';
+ };
+
+ You can provide an optional replacer method. It will be passed the
+ key and value of each member, with this bound to the containing
+ object. The value that is returned from your method will be
+ serialized. If your method returns undefined, then the member will
+ be excluded from the serialization.
+
+ If the replacer parameter is an array of strings, then it will be
+ used to select the members to be serialized. It filters the results
+ such that only members with keys listed in the replacer array are
+ stringified.
+
+ Values that do not have JSON representations, such as undefined or
+ functions, will not be serialized. Such values in objects will be
+ dropped; in arrays they will be replaced with null. You can use
+ a replacer function to replace those with JSON values.
+ JSON.stringify(undefined) returns undefined.
+
+ The optional space parameter produces a stringification of the
+ value that is filled with line breaks and indentation to make it
+ easier to read.
+
+ If the space parameter is a non-empty string, then that string will
+ be used for indentation. If the space parameter is a number, then
+ the indentation will be that many spaces.
+
+ Example:
+
+ text = JSON.stringify(['e', {pluribus: 'unum'}]);
+ // text is '["e",{"pluribus":"unum"}]'
+
+
+ text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
+ // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+
+ text = JSON.stringify([new Date()], function (key, value) {
+ return this[key] instanceof Date ?
+ 'Date(' + this[key] + ')' : value;
+ });
+ // text is '["Date(---current time---)"]'
+
+
+ JSON.parse(text, reviver)
+ This method parses a JSON text to produce an object or array.
+ It can throw a SyntaxError exception.
+
+ The optional reviver parameter is a function that can filter and
+ transform the results. It receives each of the keys and values,
+ and its return value is used instead of the original value.
+ If it returns what it received, then the structure is not modified.
+ If it returns undefined then the member is deleted.
+
+ Example:
+
+ // Parse the text. Values that look like ISO date strings will
+ // be converted to Date objects.
+
+ myData = JSON.parse(text, function (key, value) {
+ var a;
+ if (typeof value === 'string') {
+ a =
+/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
+ if (a) {
+ return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+ +a[5], +a[6]));
+ }
+ }
+ return value;
+ });
+
+ myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
+ var d;
+ if (typeof value === 'string' &&
+ value.slice(0, 5) === 'Date(' &&
+ value.slice(-1) === ')') {
+ d = new Date(value.slice(5, -1));
+ if (d) {
+ return d;
+ }
+ }
+ return value;
+ });
+
+
This is a reference implementation. You are free to copy, modify, or
redistribute.
- Use your own copy. It is extremely unwise to load third party
- code into your pages.
+ This code should be minified before deployment.
+ See http://javascript.crockford.com/jsmin.html
+
+ USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+ NOT CONTROL.
*/
-export('JSON');
+/*jslint evil: true */
-if (!this.JSON) {
+/*global JSON */
- JSON = function () {
+/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
+ call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
+ getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
+ lastIndex, length, parse, prototype, push, replace, slice, stringify,
+ test, toJSON, toString, valueOf
+*/
- function f(n) { // Format integers to have at least two digits.
- return n < 10 ? '0' + n : n;
- }
+// Create a JSON object only if one does not already exist. We create the
+// methods in a closure to avoid creating global variables.
- Date.prototype.toJSON = function () {
+if (!exports.JSON) {
+ exports.JSON = {};
+}
+
+(function () {
+
+ function f(n) {
+ // Format integers to have at least two digits.
+ return n < 10 ? '0' + n : n;
+ }
+
+ if (typeof Date.prototype.toJSON !== 'function') {
+
+ Date.prototype.toJSON = function (key) {
+
return this.getUTCFullYear() + '-' +
f(this.getUTCMonth() + 1) + '-' +
f(this.getUTCDate()) + 'T' +
@@ -34,8 +181,18 @@
f(this.getUTCSeconds()) + 'Z';
};
+ String.prototype.toJSON =
+ Number.prototype.toJSON =
+ Boolean.prototype.toJSON = function (key) {
+ return this.valueOf();
+ };
+ }
- var m = { // table of character substitutions
+ var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
+ escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
+ gap,
+ indent,
+ meta = { // table of character substitutions
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
@@ -43,118 +200,280 @@
'\r': '\\r',
'"' : '\\"',
'\\': '\\\\'
- };
+ },
+ rep;
- function stringify(value, whitelist) {
- var a, // The array holding the partial texts.
- i, // The loop counter.
- k, // The member key.
- l, // Length.
- r = /["\\\x00-\x1f\x7f-\x9f]/g,
- v; // The member value.
- switch (typeof value) {
- case 'string':
+ function quote(string) {
- return r.test(value) ?
- '"' + value.replace(r, function (a) {
- var c = m[a];
- if (c) {
- return c;
- }
- c = a.charCodeAt();
- return '\\u00' + Math.floor(c / 16).toString(16) +
- (c % 16).toString(16);
- }) + '"' :
- '"' + value + '"';
+// 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.
- case 'number':
+ escapable.lastIndex = 0;
+ return escapable.test(string) ?
+ '"' + string.replace(escapable, function (a) {
+ var c = meta[a];
+ return typeof c === 'string' ? c :
+ '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+ }) + '"' :
+ '"' + string + '"';
+ }
- return isFinite(value) ? String(value) : 'null';
- case 'boolean':
- case 'null':
- return String(value);
+ function str(key, holder) {
- case 'object':
+// Produce a string from holder[key].
- if (!value) {
- return 'null';
- }
+ var i, // The loop counter.
+ k, // The member key.
+ v, // The member value.
+ length,
+ mind = gap,
+ partial,
+ value = holder[key];
- if (typeof value.toJSON === 'function') {
- return stringify(value.toJSON());
+// 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';
+ }
+
+// Make an array to hold the partial results of stringifying this object value.
+
+ gap += indent;
+ partial = [];
+
+// Is the value an array?
+
+ if (Object.prototype.toString.apply(value) === '[object Array]') {
+
+// The value 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';
}
- a = [];
- if (typeof value.length === 'number' &&
- !(value.propertyIsEnumerable('length'))) {
- l = value.length;
- for (i = 0; i < l; i += 1) {
- a.push(stringify(value[i], whitelist) || 'null');
- }
+// Join all of the elements together, separated with commas, and wrap them in
+// brackets.
- return '[' + a.join(',') + ']';
- }
- if (whitelist) {
- l = whitelist.length;
- for (i = 0; i < l; i += 1) {
- k = whitelist[i];
- if (typeof k === 'string') {
- v = stringify(value[k], whitelist);
- if (v) {
- a.push(stringify(k) + ':' + v);
- }
+ 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 (rep && typeof rep === 'object') {
+ length = rep.length;
+ for (i = 0; i < length; i += 1) {
+ k = rep[i];
+ if (typeof k === 'string') {
+ v = str(k, value);
+ if (v) {
+ partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
- } else {
+ }
+ } else {
- for (k in value) {
- if (typeof k === 'string') {
- v = stringify(value[k], whitelist);
- if (v) {
- a.push(stringify(k) + ':' + v);
- }
+// Otherwise, iterate through all of the keys in the object.
+
+ for (k in value) {
+ if (Object.hasOwnProperty.call(value, k)) {
+ v = str(k, value);
+ if (v) {
+ partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
+ }
- return '{' + a.join(',') + '}';
- }
+// 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 {
- stringify: stringify,
- parse: function (text, filter) {
- var j;
+// If the JSON object does not yet have a stringify method, give it one.
- function walk(k, v) {
- var i, n;
- if (v && typeof v === 'object') {
- for (i in v) {
- if (Object.prototype.hasOwnProperty.apply(v, [i])) {
- n = walk(i, v[i]);
- if (n !== undefined) {
- v[i] = n;
- } else {
- delete v[i];
- }
+ if (typeof JSON.stringify !== 'function') {
+ JSON.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 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 a replacer, it must be a function or an array.
+// Otherwise, throw an error.
+
+ rep = replacer;
+ if (replacer && typeof replacer !== 'function' &&
+ (typeof replacer !== 'object' ||
+ typeof replacer.length !== 'number')) {
+ 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});
+ };
+ }
+
+
+// If the JSON object does not yet have a parse method, give it one.
+
+ if (typeof JSON.parse !== 'function') {
+ JSON.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 filter(k, v);
}
- if (/^[\],:{}\s]*$/.test(text.replace(/\\["\\\/bfnrtu]/g, '@').
+ return reviver.call(holder, key, value);
+ }
+
+
+// Parsing happens in four stages. In the first stage, we replace certain
+// Unicode characters with escape sequences. JavaScript handles many characters
+// incorrectly, either silently deleting them, or treating them as line endings.
+
+ cx.lastIndex = 0;
+ if (cx.test(text)) {
+ text = text.replace(cx, function (a) {
+ return '\\u' +
+ ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+ });
+ }
+
+// In the second 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 second stage into 4 regexp operations in order to work around
+// crippling inefficiencies in IE's and Safari's regexp engines. First we
+// replace the JSON 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(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
- j = eval('(' + text + ')');
+// In the third 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.
- return typeof filter === 'function' ? walk('', j) : j;
- }
+ j = eval('(' + text + ')');
- throw new SyntaxError('parseJSON');
+// In the optional fourth 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 SyntaxError is thrown.
+
+ throw new SyntaxError('JSON.parse');
};
- }();
-}
\ No newline at end of file
+ }
+}());