1 var untilde = function(str) {
2 return str.replace(/~./g, function(m) {
9 throw new Error("Invalid tilde escape: " + m);
13 var traverse = function(obj, pointer, value) {
14 // assert(isArray(pointer))
15 var part = untilde(pointer.shift());
16 if(!obj.hasOwnProperty(part)) {
19 if(pointer.length !== 0) { // keep traversin!
20 return traverse(obj[part], pointer, value);
23 if(typeof value === "undefined") {
27 // set new value, return old value
28 var old_value = obj[part];
37 var validate_input = function(obj, pointer) {
38 if(typeof obj !== "object") {
39 throw new Error("Invalid input object.");
47 throw new Error("Invalid JSON pointer.");
50 pointer = pointer.split("/");
51 var first = pointer.shift();
53 throw new Error("Invalid JSON pointer.");
59 var get = function(obj, pointer) {
60 pointer = validate_input(obj, pointer);
61 if (pointer.length === 0) {
64 return traverse(obj, pointer);
67 var set = function(obj, pointer, value) {
68 pointer = validate_input(obj, pointer);
69 if (pointer.length === 0) {
70 throw new Error("Invalid JSON pointer for set.")
72 return traverse(obj, pointer, value);