OpenSRF/src/javascript/JSON.js

   1 // in case we run on an implimentation that doesn't have "undefined";
   2 var undefined;
   3
   4 function Cast (obj, class_constructor) {
   5         try {
   6                 if (eval(class_constructor + '["_isfieldmapper"]')) {
   7                         obj = eval("new " + class_constructor + "(obj)");
   8                 }
   9         } catch( E ) {
  10                 alert( E + "\n");
  11         } finally {
  12                 return obj;
  13         }
  14 }
  15
  16 function JSON2js (json) {
  17
  18         json = String(json).replace( /\/\*--\s*S\w*?\s*?\s+\w+\s*--\*\//g, 'Cast(');
  19         json = String(json).replace( /\/\*--\s*E\w*?\s*?\s+(\w+)\s*--\*\//g, ', "$1")');
  20
  21         var obj;
  22         if (json != '') {
  23                 try {
  24                         eval( 'obj = ' + json );
  25                 } catch(E) {
  26                         debug("Error building JSON object with string " + json );
  27                         return null;
  28                 }
  29         }
  30         return obj;
  31 }
  32
  33
  34 function js2JSON(arg) {
  35         var i, o, u, v;
  36
  37         switch (typeof arg) {
  38                 case 'object':
  39
  40                         if(arg) {
  41
  42                                 if (arg._isfieldmapper) { /* magi-c-ast for fieldmapper objects */
  43                                         return "/*--S" + arg.classname + "--*/" + js2JSON(arg.array) + "/*--E" + arg.classname + "--*/";
  44
  45                                 } else {
  46
  47                                         if (arg.constructor == Array) {
  48                                                 o = '';
  49                                                 for (i = 0; i < arg.length; ++i) {
  50                                                         v = js2JSON(arg[i]);
  51                                                         if (o) {
  52                                                                 o += ',';
  53                                                         }
  54                                                         if (v !== u) {
  55                                                                 o += v;
  56                                                         } else {
  57                                                                 o += 'null,';
  58                                                         }
  59                                                 }
  60                                                 return '[' + o + ']';
  61                                         } else if (typeof arg.toString != 'undefined') {
  62                                                 o = '';
  63                                                 for (i in arg) {
  64                                                         v = js2JSON(arg[i]);
  65                                                         if (v !== u) {
  66                                                                 if (o) {
  67                                                                         o += ',';
  68                                                                 }
  69                                                                 o += js2JSON(i) + ':' + v;
  70                                                         }
  71                                                 }
  72
  73                                                 o = '{' + o + '}';
  74                                                 return o;
  75
  76                                         } else {
  77                                                 return;
  78                                         }
  79                                 }
  80                         }
  81                         return 'null';
  82
  83                 case 'unknown':
  84                 case 'number':
  85                         return arg;
  86
  87                 case 'undefined':
  88                 case 'function':
  89                         return u;
  90
  91                 case 'string':
  92                 default:
  93                         return '"' + String(arg).replace(/(["\\])/g, '\\$1') + '"';
  94         }
  95 }