JsonReader.js
Ext.data.JsonReader = function(meta, recordType){
Ext.data.JsonReader.superclass.constructor.call(this, meta, recordType);
};
Ext.extend(Ext.data.JsonReader, Ext.data.DataReader, {
read : function(response){
var json = response.responseText;
var o = eval('('+json+')');
if(!o) {
throw {message: 'JsonReader.read: Json object not found'};
}
return this.readRecords(o);
},
readRecords : function(o){
var s = this.meta;
var sid = s.id;
var recordType = this.recordType, fields = recordType.prototype.fields;
var totalRecords = 0;
if(s.totalProperty){
var v = parseInt(eval('o.' + s.totalProperty), 10);
if(!isNaN(v)){
totalRecords = v;
}
}
var records = [];
var root = eval('o.' + s.root);
for(var i = 0; i < root.length; i++){
var n = root[i];
var values = {};
var id = (n[sid] !== undefined && n[sid] !== '' ? n[sid] : null);
for(var j = 0, jlen = fields.length; j < jlen; j++){
var f = fields.items[j];
var map = f.mapping || f.name;
var v = n[map] !== undefined ? n[map] : f.defaultValue;
v = f.convert(v);
values[f.name] = v;
}
var record = new recordType(values, id);
record.json = n;
records[records.length] = record;
}
return {
records : records,
totalRecords : totalRecords || records.length
};
}
});
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