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                         debug("Casting object to class " + class_constructor + "\n");
   8                         obj = eval("new " + class_constructor + "(obj)");
   9                         debug("My Classname: " + obj.classname);
  10                 }
  11         } catch( E ) {
  12                 alert( E + "\n");
  13         } finally {
  14                 return obj;
  15         }
  16 }
  17
  18 function JSON2js (json) {
  19
  20         json = String(json).replace( /\/\*--\s*S\w*?\s*?\s+\w+\s*--\*\//g, 'Cast(');
  21         json = String(json).replace( /\/\*--\s*E\w*?\s*?\s+(\w+)\s*--\*\//g, ', "$1")');
  22
  23         debug("=======================\n" + json);
  24
  25         var obj;
  26         if (json != '') {
  27                 try {
  28                         eval( 'obj = ' + json );
  29                 } catch(E) {
  30                         debug("Error building JSON object with string " + json );
  31                         return null;
  32                 }
  33         }
  34         return obj;
  35 }
  36
  37
  38 function js2JSON(arg) {
  39         var i, o, u, v;
  40
  41         debug( "Running js2JSON on " + arg );
  42
  43         switch (typeof arg) {
  44                 case 'object':
  45
  46                         if(arg) {
  47
  48                                 if (arg._isfieldmapper) {
  49                                         return "/*--S acp*/" + js2JSON(arg.array) + "/*--E acp*/";
  50
  51                                 } else {
  52
  53                                         if (arg.constructor == Array) {
  54                                                 o = '';
  55                                                 for (i = 0; i < arg.length; ++i) {
  56                                                         v = js2JSON(arg[i]);
  57                                                         if (o) {
  58                                                                 o += ',';
  59                                                         }
  60                                                         if (v !== u) {
  61                                                                 o += v;
  62                                                         } else {
  63                                                                 o += 'null,';
  64                                                         }
  65                                                 }
  66                                                 return '[' + o + ']';
  67                                         } else if (typeof arg.toString != 'undefined') {
  68                                                 o = '';
  69                                                 for (i in arg) {
  70                                                         v = js2JSON(arg[i]);
  71                                                         if (v !== u) {
  72                                                                 if (o) {
  73                                                                         o += ',';
  74                                                                 }
  75                                                                 o += js2JSON(i) + ':' + v;
  76                                                         }
  77                                                 }
  78                                                 var obj_start = '{';
  79                                                 var obj_end = '}';
  80                                                 try {
  81                                                         if ( arg.class_name() ) {
  82                                                                 obj_start = '/*--S ' + arg.class_name() + '--*/{';
  83                                                                 obj_end   = '}/*--E ' + arg.class_name() + '--*/';
  84                                                         }
  85                                                 } catch( E ) {}
  86                                                 o = obj_start + o + obj_end;
  87                                                 return o;
  88                                         } else {
  89                                                 return;
  90                                         }
  91                                 }
  92                         }
  93                         return 'null';
  94
  95                 case 'unknown':
  96                 case 'number':
  97                         return arg;
  98
  99                 case 'undefined':
 100                 case 'function':
 101                         return u;
 102
 103                 case 'string':
 104                 default:
 105                         return '"' + String(arg).replace(/(["\\])/g, '\\$1') + '"';
 106         }
 107 }