Open-ILS/web/opac/common/js/fmgen.js

   1 /* generate fieldmapper javascript classes.  This expects a global variable
   2         called 'fmclasses' to be fleshed with the classes we need to build */
   3
   4 function Fieldmapper() {}
   5
   6 var errorstr = "Attempt to build fieldmapper object with non-array";
   7
   8 Fieldmapper.prototype.clone = function() {
   9         var obj = new this.constructor();
  10
  11         for( var i in this.a ) {
  12                 var thing = this.a[i];
  13                 if(thing == null) continue;
  14
  15                 if( thing._isfieldmapper ) {
  16                         obj.a[i] = thing.clone();
  17                 } else {
  18
  19                         if(instanceOf(thing, Array)) {
  20                                 obj.a[i] = new Array();
  21
  22                                 for( var j in thing ) {
  23
  24                                         if( thing[j]._isfieldmapper )
  25                                                 obj.a[i][j] = thing[j].clone();
  26                                         else
  27                                                 obj.a[i][j] = thing[j];
  28                                 }
  29                         } else {
  30                                 obj.a[i] = thing;
  31                         }
  32                 }
  33         }
  34         return obj;
  35 }
  36 Fieldmapper.prototype.isnew = function(n) { if(arguments.length == 1) this.a[0] =n; return this.a[0]; }
  37 Fieldmapper.prototype.ischanged = function(n) { if(arguments.length == 1) this.a[1] =n; return this.a[1]; }
  38 Fieldmapper.prototype.isdeleted = function(n) { if(arguments.length == 1) this.a[2] =n; return this.a[2]; }
  39 function FMEX(message) { this.message = message; }
  40 FMEX.toString = function() { return "FieldmapperException: " + this.message + "\n"; }
  41
  42 var string = "";
  43 for( var cl in fmclasses ) {
  44         string += cl + ".prototype = new Fieldmapper(); " +
  45                                                 cl + ".prototype.constructor = " + cl + ";" +
  46                                                 cl + ".baseClass = Fieldmapper.constructor;" +
  47                                                 "function " + cl + "(a) { " +
  48                                                         "this.classname = \"" + cl + "\";" +
  49                                                         "this._isfieldmapper = true;" +
  50                                                         "if(a) { if(a.constructor == Array) this.a = a; else throw new FMEX(errorstr);} else this.a = []}";
  51
  52         string += cl + "._isfieldmapper=true;";
  53
  54         for( var pos in fmclasses[cl] ) {
  55                 var p = parseInt(pos) + 3;
  56                 var field = fmclasses[cl][pos];
  57                 string += cl + ".prototype." + field +
  58                         "=function(n){if(arguments.length == 1)this.a[" +
  59                         p + "]=n;return this.a[" + p + "];};";
  60         }
  61 }
  62 eval(string);
  63
  64