递归JSON解析器中的错误在哪里？ [英] Where is the bug in my recursive JSON parser?
问题描述
我想创建一个递归函数来解析类似json的数据，如下所示。当key为xtype时，将创建一个新类。特别是，当xtype = gridpanel / treepanel时，所有属性都必须是其构造函数参数，否则，在创建类后将添加属性。
我的递归函数如下，我在ext-all.js的第21行有一个错误'太多的递归'。
I'd like to create a recursive function to parse json-like data as below. When key is xtype, a new class will be created. In particular, when xtype = gridpanel/treepanel, all the properties have to be its constructor argument, otherwise, properties will be added after class has been created. My recursive function as below, I got an error 'too much recursion' at line 21 in ext-all.js.
请看一下，我能解决这个问题吗？
Please take a look, how am I able to solve this problem?
主程序中的代码： / p>
codes in main program:
me.recursiveParser(null, data.json);
Ext.apply(me.root, me.parent);
me.desktopCfg = me.root;
recursiveParser函数：
recursiveParser function:
recursiveParser: function(nodeName, jsonData) {
var properties = {};
var isSpecial = false;
var isLeaf = true;
var parent, child, special;
//Base factor
for (var key in jsonData) {
var value = jsonData[key];
//To collect all the properties that is only initialized with '@'.
if (key.toString().indexOf("@") === 0) {
key = key.replace("@", "");
if(typeof(value) === "string"){
properties[key] = "'"+value+"'";
}else{
//Later, should have to deal with the empty value or array with no keys and only elements.
properties[key] = value;
}
if(key === "xtype"){
//To initialize the root
if(nodeName === null){
this.root = this.createNewObject(value, null);
}
if(value === "gridpanel" || value === "treepanel"){
isSpecial = true;
special = value;
}else{
child = this.createNewObject(value, null);
}
}
}else {
isLeaf = false;
}
}
if(isSpecial){
child = this.createNewObject(special, properties);
}
//To add the subnode and its properties to its parent object.
if (nodeName !== null && typeof(nodeName) === "string") {
if(child === null){
Ext.apply(parent, properties);
}else{
Ext.apply(parent, child);
}
}
if(isLeaf){
return;
}
for (var key in jsonData) {
var value = jsonData[key];
if (key.toString().indexOf("@") === 0) {
continue;
}else{
if(value === "[object Object]"){
for(var index in value){
this.recursiveParser(key, value[index]);
}
}else{
this.recursiveParser(key, value);
}
Ext.apply(this.root, parent);
}
}
}
createNewObject函数：
createNewObject function:
createNewObject: function(objType, properties){
if(objType){
switch (objType){
case "gridpanel":
return new MyProg.base.GridPanel(properties);
break;
case "treepanel":
return new MyProg.base.TreePanel(properties);
break;
case "tabpanel":
return new MyProg.base.TabPanel();
break;
case "tab":
return new MyProg.base.Tabs();
break;
case "formpanel":
return new MyProg.base.Accordion();
break;
case "fieldset":
return new MyProg.base.FieldSet();
break;
case "textfield":
return new MyProg.base.Fields();
break;
case "panel":
return new MyProg.base.Accordion();
break;
default:
return new MyProg.base.Accordion();
};
};
}
data.json：
data.json:
var data = {
"json": {
"@title": "BusinessIntelligence",
"@xtype": "tab",
"@layout": "accordion",
"items": [
{
"@title": "SalesReport",
"@ctitle": "SalesReport",
"@layout": "column",
"items": [
{}
]
},
{
"@title": "ContentPlayingReport",
"@ctitle": "ContentPlayingReport",
"@layout": "column",
"items": [
{}
]
},
{
"@title": "BusinessIntelligence",
"@ctitle": "BusinessIntelligence",
"@layout": "column",
"items": [
{}
]
}
]
}
}
推荐答案
我修改了递归部分，现在看起来更加优雅。所有的xtype工作都很好，除了gridpanel，我已经检查了DOM，一切都在那里，但仍然有错误信息：
I modified the recursion part, it looks more elegant now. All the xtype works just fine, except gridpanel, I've check DOM, everything is in there, but still got error message:
TypeError: c is undefined
...+g.extraBaseCls);delete g.autoScroll;if(!g.hasView){if(c.buffered&&!c.remoteSort...
ext-all.js (line 21, col 1184416)
我怀疑这是一个ExtJS错误
I suspect it's an ExtJS bug. I'll try to find another way out.
递归程序：
recursiveParser: function (jsonData) {
var me = this;
var properties = {};
for ( var key in jsonData ){
var value = jsonData[key];
var items = (value.constructor === Array) ? [] : {};
if (value instanceof Object) {
if (isNaN(key)){
if (items.constructor === Array) {
for (var node in value){
items.push(me.recursiveParser(value[node]));
}
properties[key] = items;
} else {
properties[key] = me.recursiveParser(value);
}
} else {
return me.recursiveParser(value);
}
} else {
if (key.toString().indexOf('@') === 0){
key = key.replace('@', '');
properties[key] = value;
}
}
}
return properties;
}
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