TJElement Class
Abstract base class for all JSON elements in the JSON Document Object Model.
Remarks
TJElement serves as the root of the JSON DOM class hierarchy. It provides type checking methods (IsArray, IsObject, etc.), type casting methods (AsArray, AsObject, etc.), and value access methods (AsBoolean, AsString, etc.) for working with JSON elements in a type-safe manner.
Concrete subclasses include TJArray, TJObject, TJPrimitive, and TJNull.
Syntax
Unit: Bcl.Json.Classes
TJElement = class(TObject);Methods
| Name | Description |
|---|---|
| IsArray | Returns True if this element is a TJArray. |
| IsObject | Returns True if this element is a TJObject. |
| IsPrimitive | Returns True if this element is a TJPrimitive. |
| IsNull | Returns True if this element is a TJNull. |
| AsArray | Casts this element to TJArray. |
| AsObject | Casts this element to TJObject. |
| AsPrimitive | Casts this element to TJPrimitive. |
| AsNull | Casts this element to TJNull. |
| AsBoolean | Returns the value of this element as a Boolean. |
| AsString | Returns the value of this element as a string. |
| AsDouble | Returns the value of this element as a Double. |
| AsInteger | Returns the value of this element as an Integer. |
| AsInt64 | Returns the value of this element as an Int64. |
| IsBoolean | Returns True if this element holds a Boolean value. |
| IsString | Returns True if this element holds a string value. |
| IsDouble | Returns True if this element holds a Double value. |
| IsInteger | Returns True if this element holds an Integer value. |
| IsInt64 | Returns True if this element holds an Int64 value. |
| Clone | Creates a deep copy of this JSON element. |
| ToJSONValue | Converts this JSON element to a System.Json.TJSONValue instance. |
| FromJSONValue | Creates a TJElement from a System.Json.TJSONValue instance. |