jni_singleton.cpp

/**************************************************************************/
/*  jni_singleton.cpp                                                     */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#include "jni_singleton.h"

#include "core/object/class_db.h"

void JNISingleton::_bind_methods() {
	ClassDB::bind_method(D_METHOD("has_java_method", "method"), &JNISingleton::has_java_method);
}

Variant JNISingleton::callp(const StringName &p_method, const Variant **p_args, int p_argcount, Callable::CallError &r_error) {
	// Godot methods take precedence.
	Variant ret = Object::callp(p_method, p_args, p_argcount, r_error);
	if (r_error.error == Callable::CallError::CALL_OK) {
		return ret;
	}

	// Check the method we're looking for is in the JNISingleton map.
	// This is done because JNISingletons register methods differently than wrapped JavaClass / JavaObject to allow
	// for access to private methods annotated with the @UsedByGodot annotation.
	// In the future, we should remove access to private methods and require that JNISingletons' methods exposed to
	// GDScript be all public, similarly to what we do for wrapped JavaClass / JavaObject methods. Doing so will
	// also allow dropping and deprecating the @UsedByGodot annotation.
	RBMap<StringName, MethodData>::Element *E = method_map.find(p_method);
	if (E) {
		if (wrapped_object.is_valid()) {
			return wrapped_object->callp(p_method, p_args, p_argcount, r_error);
		} else {
			r_error.error = Callable::CallError::CALL_ERROR_INSTANCE_IS_NULL;
		}
	}
	return Variant();
}

void JNISingleton::add_method(const StringName &p_name, const Vector<Variant::Type> &p_args, Variant::Type p_ret_type) {
	MethodData md;
	md.argtypes = p_args;
	md.ret_type = p_ret_type;
	method_map[p_name] = md;
}

void JNISingleton::add_signal(const StringName &p_name, const Vector<Variant::Type> &p_args) {
	MethodInfo mi;
	mi.name = p_name;
	for (int i = 0; i < p_args.size(); i++) {
		mi.arguments.push_back(PropertyInfo(p_args[i], "arg" + itos(i + 1)));
	}
	ADD_SIGNAL(mi);
}