Interface StructureFilterMapFunc

All Superinterfaces:

FunctionPointer

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
@Generated("org.javagi.JavaGI")
public interface StructureFilterMapFunc
extends FunctionPointer

Functional interface declaration of the StructureFilterMapFunc callback.

See Also:

• run(Quark, Value)

Method Summary

Modifier and Type	Method	Description
boolean	run(Quark fieldId, Value value)	A function that will be called in gst_structure_filter_and_map_in_place().
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(int, MemorySegment, MemorySegment) method.
default int	upcall(int fieldId, MemorySegment value, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

boolean run(Quark fieldId,
 Value value)

A function that will be called in gst_structure_filter_and_map_in_place(). The function may modify value, and the value will be removed from the structure if false is returned.

Parameters:

fieldId - the GQuark of the field name

value - the GValue of the field

Returns:

true if the field should be preserved, false if it should be removed.

upcall

default int upcall(int fieldId,
 MemorySegment value,
 MemorySegment userData)

The upcall method is called from native code. The parameters are marshaled and run(Quark, Value) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(int, MemorySegment, MemorySegment) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer