superobject使用方法
ISuperObject.AsObject 可获取一个 TSuperTableString 对象.
TSuperTableString 的常用属性: count、GetNames、GetValues
var
jo: ISuperObject;
jts: TSuperTableString;
begin
jo := SO(‘{A:1, B:2, C:3, D:{x:4, y:5, z:6}}‘);
jts := jo.AsObject;
ShowMessage(IntToStr(jts.count)); // 4
ShowMessage(jts.GetNames.AsString); // ["D","C","B","A"]
ShowMessage(jts.GetValues.AsString); // [{"z":6,"y":5,"x":4},3,2,1]
jts := jo[‘D‘].AsObject;
ShowMessage(IntToStr(jts.count)); // 3
ShowMessage(jts.GetNames.AsString); // ["z","y","x"]
ShowMessage(jts.GetValues.AsString); // [6,5,4]
end;
使用FOR...IN...遍历子对象,不适用于DELPHI7等低版本,因为它们不支持此语法。
var
jo,i: ISuperObject;
begin
jo := SO(‘{A:1, B:2, C:3, D:[4, 5, {X:6}, {Y:[7,8,{m:9}]}]}‘);
for i in jo do ShowMessage(i.AsString);
end;
TSuperAvlIterator 枚举出的是 TSuperAvlEntry 对象(其包含 Name 和 Value);
获取 TSuperAvlIterator 方法:
TSuperTableString.GetEnumerator 或者 ISuperObject.AsObject.GetEnumerator.
var
jo: ISuperObject;
ite: TSuperAvlIterator;
begin
jo := SO(‘{A:1, B:2, C:3, D:[4, 5, {X:6}, {Y:7}]}‘);
ite := jo.AsObject.GetEnumerator;
ite.First;
while ite.MoveNext do
begin
lname := ite.Current.Name;
lvalue := ite.Current.Value.AsString;
ite.Next;
end;
end;
ObjectFindFirst、ObjectFindNext、ObjectFindClose 是 SuperObject 给的另一种枚举元素的方式.
它用到了一个结构:
TSuperObjectIter = record
key: SOString;
val: ISuperObject;
Ite: TSuperAvlIterator;
end;
//应用举例:
var
jo: ISuperObject;
iter: TSuperObjectIter;
begin
jo := SO(‘{A:1, B:2, C:3, D:[4, 5, {X:6}, {Y:7}]}‘);
if ObjectFindFirst(jo, iter) then
begin
repeat
ShowMessageFmt(‘%s - %s‘, [iter.key, iter.val.AsString]);
until not ObjectFindNext(iter);
end;
ObjectFindClose(iter);
end;
//或者:
var
jo: ISuperObject;
iter: TSuperObjectIter;
begin
jo := SO(‘{A:1, B:2, C:3, D:[4, 5, {X:6}, {Y:7}]}‘);
if ObjectFindFirst(jo, iter) then
begin
repeat
ShowMessageFmt(‘%s - %s‘, [iter.Ite.Current.Name, iter.Ite.Current.Value.AsString]);
until not ObjectFindNext(iter);
end;
ObjectFindClose(iter);
end;