javascript递归验证
我想用条件和、而不是或和id键来验证json树。诸如此类:javascript递归验证,javascript,json,recursion,tree,Javascript,Json,Recursion,Tree,我想用条件和、而不是或和id键来验证json树。诸如此类: { "OR": [ { "AND": [ { "NOT": [ { "id": 2 } ] }
{
"OR": [
{
"AND": [
{
"NOT": [
{
"id": 2
}
]
},
{
"id": 2
}
]
},
{
"AND": [
{
"id": 3
},
{
"id": 3
}
]
}
]
}
这是一个有效的树。但如果json包含任何其他操作或具有空[],{}它将无效。比如说,
{
"X": [ //INVALID TAG
{
"AND": [
{
"NOT": [
{
//EMPTY
}
]
},
{
"id": 2
}
]
},
{
"AND": [
{
"id": 3
},
{
"id": 3
}
]
}
]
}
我的代码:
var validateRule = function (js) {
console.log('current validation ' + JSON.stringify(js));
if (js.hasOwnProperty('OR')) {
return js.hasOwnProperty('length') ? js.length > 0 && validateRule(js.OR) : validateRule(js.OR);
}
if (js.hasOwnProperty('AND')) {
return js.hasOwnProperty('length') ? js.length > 0 && validateRule(js.AND) : validateRule(js.AND);
}
if (js.hasOwnProperty('NOT')) {
return js.hasOwnProperty('length') ? js.length > 0 && validateRule(js.NOT) : validateRule(js.NOT);
}
if (js.hasOwnProperty('length')) { //JSON Array
if (js.length == 0) {
return false;
} else if (js.length == 1) {
return js[0].hasOwnProperty('id');
} else {
for (var key in js) {
if (js.hasOwnProperty(key)) {
return validateRule(js[key]);
}
}
}
} else {
return js.hasOwnProperty('id');
}
};
但由于在循环中,我的“返回”代码不能正常工作。请给我一些建议。异常可能是在嵌套验证中传递失败的最干净的方法。比如说,
function classOf(p) {
return {}.toString.call(p).slice(8, -1);
}
function check(expr) {
if(classOf(expr) != "Object")
throw SyntaxError("Object expected");
if(!Object.keys(expr).length)
throw SyntaxError("Empty object");
return Object.keys(expr).forEach(function(key) {
var val = expr[key];
switch(key) {
case "AND":
case "OR":
case "NOT":
if(classOf(val) != "Array")
throw SyntaxError("Array expected");
if(key == "NOT" && val.length !== 1)
throw SyntaxError("Incorrect number of arguments");
if(key != "NOT" && val.length < 2)
throw SyntaxError("Incorrect number of arguments");
val.forEach(check);
break;
case "id":
if(classOf(val) != "Number")
throw SyntaxError("Number expected");
break;
default:
throw SyntaxError("Invalid operator " + key);
}
});
}
您了解json和array之间的区别吗?yes=json它的格式,array是datatype。您返回的值不起作用,因为您只返回ARRAYTANK的第一个值。但万一不行,[{}]不能正常工作。@YuriyAizenberg:修正了!
try {
check(expr);
// expression is valid, move on
} catch(e) {
if(e instanceof SyntaxError)
// expression is invalid, handle that
else
// something else went wrong
throw e;
}