Package org.javagi.gobject.types

Class Overrides

java.lang.Object

org.javagi.gobject.types.Overrides

@NullMarked
public class Overrides
extends Object

Helper class to register method overrides in a new GType.

Constructor Summary

Constructors

Constructor	Description
Overrides()

Method Summary

Modifier and Type	Method	Description
static MemorySegment	lookupVirtualMethodParent(MemorySegment address, MemoryLayout layout, String name)	Returns a function pointer to the specified virtual method.
static MemorySegment	lookupVirtualMethodParent(MemorySegment address, MemoryLayout layout, String name, Type ifaceType)	Returns a function pointer to the specified virtual method.
static <TC extends TypeClass> @Nullable Consumer<TypeClass>	overrideClassMethods(Class<?> cls)	Find declared methods that override methods defined in a GObject type class, and return a class initializer lambda that will register the method overrides in the class virtual function table.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Overrides

public Overrides()

Method Details

overrideClassMethods

public static <TC extends TypeClass>
@Nullable Consumer<TypeClass> overrideClassMethods(Class<?> cls)

Find declared methods that override methods defined in a GObject type class, and return a class initializer lambda that will register the method overrides in the class virtual function table.

Parameters:

cls - the class that possibly declares method overrides

Returns:

a lambda to run during class initialization that will register the virtual functions

lookupVirtualMethodParent

public static MemorySegment lookupVirtualMethodParent(MemorySegment address,
 MemoryLayout layout,
 String name)

Returns a function pointer to the specified virtual method. The pointer is retrieved from the TypeClass of the parent class of the instance.

Parameters:

address - the memory address of the object instance

layout - the memory layout of the object's TypeClass

name - the name of the virtual method (as defined in the TypeClass)

Returns:

a function pointer to the requested virtual method

lookupVirtualMethodParent

public static MemorySegment lookupVirtualMethodParent(MemorySegment address,
 MemoryLayout layout,
 String name,
 Type ifaceType)

Returns a function pointer to the specified virtual method. The pointer is retrieved from the TypeInterface with the specified GType, implemented by the parent class of the instance.

Parameters:

address - the memory address of the object instance

layout - the memory layout of the parent object's TypeClass

name - the name of the virtual method (as defined in the TypeInterface)

ifaceType - the GType of the interface that declares the virtual method

Returns:

a function pointer to the requested virtual method