System.JSON.TJSONNull Methods

AddDescendant protected Declares the method that can be used by the parser to reconstitute the JSON object structure.

AfterConstruction public Responds after the last constructor has executed.

AsTValue protected Fills the specified AValue instance of TValue with the value of this JSON null value, encoded using the specified type. It returns True if the specified type is supported or False otherwise.

AsType public Converts a JSON value to a specific type.

BeforeDestruction public Responds before the first destructor executes.

CheckDisposed protected

ClassInfo public Returns a pointer to the run-time type information (RTTI) table for the object type.

ClassName public Returns a string indicating the type of the object instance (as opposed to the type of the variable passed as an argument).

ClassNameIs public Determines whether an object is of a specific type.

ClassParent public Returns the type of the immediate ancestor of a class.

ClassType public Returns the class reference for the object's class.

CleanupInstance public Performs finalization on long strings, variants, and interface variables within a class.

Clone public Declares the method that should create a deep clone of the current JSON value.

Create public Creates an instance of TJSONNull.

DefaultHandler public Provides the interface for a method that processes message records.

Destroy public Destroys this instance of TJSONNull.

Dispatch public Calls message-handling methods for the object, based on the contents of the Message parameter.

DisposeOf public DisposeOf forces the execution of the destructor code in an object.

Equals public Checks whether the current instance and the Obj parameter are equal.

EstimatedByteSize public Declares the method that should return the estimated byte size of the current JSON object.

FieldAddress public Returns the address of a published object field.

FindValue public Finds and returns a TJSONValue instance located at the specified APath JSON path. Otherwise, returns nil.

Format public

Free public Destroys an object and frees its associated memory, if necessary.

FreeInstance public Deallocates memory allocated by a previous call to the NewInstance method.

GetDisposed protected Getter for the Disposed property.

GetHashCode public Returns an integer containing the hash code.

GetInterface public Retrieves a specified interface.

GetInterfaceEntry public Returns the entry for a specific interface implemented in a class.

GetInterfaceTable public Returns a pointer to a structure containing all of the interfaces implemented by a given class.

GetValue public Finds a TJSONValue object located at the specified APath JSON path, casts this JSON value as the T JSON type and returns this value. Otherwise, returns ADefaultValue.

InheritsFrom public Determines the relationship of two object types.

InitInstance public Initializes a newly allocated object instance to all zeros and initializes the instance's virtual method table pointer.

InstanceSize public Returns the size in bytes of each instance of the object type.

IsNull protected Always returns True since any TJSONNull instance represents a JSON null value.

MethodAddress public Returns the address of a class method by name.

MethodName public Returns the name of a class method by address.

NewInstance public Allocates memory for an instance of an object type and returns a pointer to that new instance.

QualifiedClassName public Returns the qualified name of the class.

SafeCallException public Handles exceptions in methods declared using the safecall calling convention.

ToBytes public Serializes the JSON null value into an array of bytes.

ToChars public

ToJSON public Returns the string representation of the JSON object.

ToString public Returns the string representation of the JSON object.

TryGetValue public Finds a TJSONValue object located at the specified APath JSON path, casts this JSON value as the T JSON type and fills AValue with the obtained JSON value. Returns True on success or False otherwise.

UnitName public Returns the name of the unit where the class is defined.

UnitScope public Returns the class's unit scope.

Value public Returns the JSON null value as a string: "null".