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 " + E + "\nString:\n" + json );
  27                         return null;
  28                 }
  29         }
  30         return obj;
  31 }
  32
  33
  34 function object2Array(obj) {
  35         var arr = new Array();
  36         for( var i  = 0; i < obj.length; i++ ) {
  37                 arr[i] = obj[i];
  38         }
  39         return arr;
  40 }
  41
  42 function js2JSON(arg) {
  43         var i, o, u, v;
  44
  45         switch (typeof arg) {
  46                 case 'object':
  47
  48                         if(arg) {
  49
  50                                 if (arg._isfieldmapper) { /* magi-c-ast for fieldmapper objects */
  51
  52                                         var arr = new Array();
  53                                         if( arg.array.constructor != Array ) {
  54                                                 for( var i  = 0; i < arg.array.length; i++ ) {
  55                                                         if(arg.array[i]._isfieldmapper) {
  56                                                                 arr[i] = arg.array[i];
  57                                                         } else if( typeof arg.array[i] != 'object' ) {
  58                                                                 arr[i] = arg.array[i];
  59                                                         } else {
  60                                                                 arr[i] = object2Array(arg.array[i]);
  61                                                         }
  62                                                 }
  63                                                 arg.array = arr;
  64                                         }
  65
  66                                         return "/*--S " + arg.classname + " --*/" + js2JSON(arg.array) + "/*--E " + arg.classname + " --*/";
  67
  68                                 } else {
  69
  70                                         if (arg.constructor == Array) {
  71                                                 o = '';
  72                                                 for (i = 0; i < arg.length; ++i) {
  73                                                         v = js2JSON(arg[i]);
  74                                                         if (o) {
  75                                                                 o += ',';
  76                                                         }
  77                                                         if (v !== u) {
  78                                                                 o += v;
  79                                                         } else {
  80                                                                 o += 'null';
  81                                                         }
  82                                                 }
  83                                                 return '[' + o + ']';
  84
  85                                         } else if (typeof arg.toString != 'undefined') {
  86                                                 o = '';
  87                                                 for (i in arg) {
  88                                                         v = js2JSON(arg[i]);
  89                                                         if (v !== u) {
  90                                                                 if (o) {
  91                                                                         o += ',';
  92                                                                 }
  93                                                                 o += js2JSON(i) + ':' + v;
  94                                                         }
  95                                                 }
  96
  97                                                 o = '{' + o + '}';
  98                                                 return o;
  99
 100                                         } else {
 101                                                 return;
 102                                         }
 103                                 }
 104                         }
 105                         return 'null';
 106
 107                 case 'unknown':
 108                 case 'number':
 109                         return arg;
 110
 111                 case 'undefined':
 112                 case 'function':
 113                         return u;
 114
 115                 case 'string':
 116                 default:
 117                         return '"' + String(arg).replace(/(["\\])/g, '\\$1') + '"';
 118         }
 119 }