src/javascript/JSON_v0.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     if( obj == null ) return null;
  36
  37     var arr = [];
  38     for( var i  = 0; i < obj.length; i++ ) {
  39         arr[i] = obj[i];
  40     }
  41     return arr;
  42 }
  43
  44
  45 function js2JSON(arg) {
  46     return _js2JSON(arg);
  47 }
  48
  49 function _js2JSON(arg) {
  50     var i, o, u, v;
  51
  52         switch (typeof arg) {
  53             case 'object':
  54
  55                 if(arg) {
  56
  57                     if (arg._isfieldmapper) { /* magi-c-ast for fieldmapper objects */
  58
  59                         if( arg.a.constructor != Array ) {
  60                             var arr = [];
  61                             for( var i  = 0; i < arg.a.length; i++ ) {
  62                                 if( arg.a[i] == null ) {
  63                                     arr[i] = null; continue;
  64                                 }
  65
  66                                 if( typeof arg.a[i] != 'object' ) {
  67                                     arr[i] = arg.a[i];
  68
  69                                 } else if( typeof arg.a[i] == 'object'
  70                                             && arg.a[i]._isfieldmapper) {
  71
  72                                     arr[i] = arg.a[i];
  73
  74                                 } else {
  75                                     arr[i] = object2Array(arg.a[i]);
  76                                 }
  77                             }
  78                             arg.a = arr;
  79                         }
  80
  81                         return "/*--S " + arg.classname + " --*/" + js2JSON(arg.a) + "/*--E " + arg.classname + " --*/";
  82
  83                     } else {
  84
  85                         if (arg.constructor == Array) {
  86                             o = '';
  87                             for (i = 0; i < arg.length; ++i) {
  88                                 v = js2JSON(arg[i]);
  89                                 if (o) {
  90                                     o += ',';
  91                                 }
  92                                 if (v !== u) {
  93                                     o += v;
  94                                 } else {
  95                                     o += 'null';
  96                                 }
  97                             }
  98                             return '[' + o + ']';
  99
 100                         } else if (typeof arg.toString != 'undefined') {
 101                             o = '';
 102                             for (i in arg) {
 103                                 v = js2JSON(arg[i]);
 104                                 if (v !== u) {
 105                                     if (o) {
 106                                         o += ',';
 107                                     }
 108                                     o += js2JSON(i) + ':' + v;
 109                                 }
 110                             }
 111
 112                             o = '{' + o + '}';
 113                             return o;
 114
 115                         } else {
 116                             return;
 117                         }
 118                     }
 119                 }
 120                 return 'null';
 121
 122             case 'unknown':
 123             case 'number':
 124                 return arg;
 125
 126             case 'undefined':
 127             case 'function':
 128                 return u;
 129
 130             case 'string':
 131             default:
 132                 return '"' + String(arg).replace(/(["\\])/g, '\\$1') + '"';
 133         }
 134
 135 }