Created
April 3, 2013 10:24
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Quick and dirty implementation of RFC 6901: http://www.rfc-editor.org/rfc/rfc6901.txt Will do RFC 6902 later...maybe...
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| /* | |
| // Will only throw on missing leading '/' | |
| */ | |
| JSON.pointer = function (object, pointer) { | |
| if ('undefined' === typeof object || 'undefined' === typeof pointer || '/' === pointer) { | |
| return object; | |
| } | |
| if ('/' !== pointer.substr(0, 1)) { | |
| throw new SyntaxError('Unexpected character ' + pointer.substr(0, 1)); | |
| } | |
| var _path = pointer.substr(1).split('/').map(function (p, idx) { | |
| if (/^[0-9]$/.test(p)) { | |
| return parseInt(p); | |
| } | |
| return p.replace('~1', '/').replace('~0', '~'); | |
| }); | |
| var _object = object; | |
| while (_path.length) { | |
| _object = _object[_path.shift()]; | |
| if ('undefined' === typeof _object) return _object; | |
| } | |
| return _object; | |
| }; | |
| /* | |
| // Extending native objects prototypes is bâaad, m'kay? | |
| */ | |
| Object.prototype.pointer = function (pointer) { | |
| return JSON.pointer(this, pointer); | |
| } | |
| /* | |
| // Quick test value. Complex enough? | |
| */ | |
| var a = { foo: { bar: [ { hello: { world: true } } ] } }; | |
| /* | |
| // Let's trigger an error! | |
| */ | |
| try { | |
| // Invalid: Missing leading '/' | |
| console.log(a.pointer('foo')); | |
| } catch (e) { | |
| // [SyntaxError: Unexpected character f] | |
| console.log(e); | |
| } | |
| /* | |
| // Now for some real use! | |
| */ | |
| console.log(a.pointer()); | |
| console.log(a.pointer('/')); | |
| console.log(a.pointer('/foo')); | |
| console.log(a.pointer('/foo/bar')); | |
| console.log(a.pointer('/foo/bar/0')); | |
| console.log(a.pointer('/foo/bar/0/hello')); | |
| console.log(a.pointer('/foo/bar/0/hello/world')); |
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