Ztree中simpleData是怎么转换成标准ztree数组对象的

 1 transformTozTreeFormat: function(setting, sNodes) {
 2             var i,l,
 3             key = setting.data.simpleData.idKey,
 4             parentKey = setting.data.simpleData.pIdKey,
 5             childKey = setting.data.key.children;
 6             if (!key || key=="" || !sNodes) return [];
 7 
 8             if (tools.isArray(sNodes)) {
 9                 var r = [];
10                 var tmpMap = [];
11                 for (i=0, l=sNodes.length; i<l; i++) {
12                     tmpMap[sNodes[i][key]] = sNodes[i];
13                 }
14                 for (i=0, l=sNodes.length; i<l; i++) {
15                     if (tmpMap[sNodes[i][parentKey]] && sNodes[i][key] != sNodes[i][parentKey]) {
16                         if (!tmpMap[sNodes[i][parentKey]][childKey])
17                             tmpMap[sNodes[i][parentKey]][childKey] = [];
18                         tmpMap[sNodes[i][parentKey]][childKey].push(sNodes[i]);
19                     } else {
20                         r.push(sNodes[i]);
21                     }
22                 }
23                 return r;
24             }else {
25                 return [sNodes];
26             }
27         }