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Cross-platform base for C++ UI apps
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AJni.h
    1/*
    2 * AUI Framework - Declarative UI toolkit for modern C++20
    3 * Copyright (C) 2020-2025 Alex2772 and Contributors
    4 *
    5 * SPDX-License-Identifier: MPL-2.0
    6 *
    7 * This Source Code Form is subject to the terms of the Mozilla Public
    8 * License, v. 2.0. If a copy of the MPL was not distributed with this
    9 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   10 */
   11
   12#pragma once
   13
   14#include "Globals.h"
   15#include "GlobalRef.h"
   16#include "Converter.h"
   17#include "Signature.h"
   18#include "Env.h"
   19#include "ArrayView.h"
   20#include <AUI/Util/APreprocessor.h>
   21#include <AUI/Traits/strings.h>
   22#include <AUI/Common/AException.h>
   23
   30
   31
   52#define AUI_JNI_CLASS(path, name) \
   53class name ## _info: public ::aui::jni::GlobalRef { \
   54public:                           \
   55    static constexpr auto JAVA_CLASS_NAME = #path ## _asl;                        \
   56    [[nodiscard]] static constexpr auto getClassName() noexcept { return #path; } \
   57    [[nodiscard]] static auto getClass() noexcept { static ::aui::jni::GlobalRef t = ::aui::jni::env()->FindClass(getClassName()); AUI_ASSERTX(t.asClass() != nullptr, "no such class: " #path); return t.asClass(); } \
   58                                      \
   59};                                \
   60struct name: public name ## _info
   61
   83#define AUI_JNI_STATIC_METHOD(ret_t, name, args) \
   84    static ret_t name (AUI_PP_FOR_EACH(AUI_JNI_INTERNAL_OMIT_BRACES, _, args)) { \
   85        static_assert(::aui::jni::convertible<ret_t>, "return type is required to be convertible"); \
   86        auto clazz = getClass();                 \
   87        auto e = ::aui::jni::env();              \
   88        const char* signature = ::aui::jni::signature_v<ret_t (AUI_PP_FOR_EACH(AUI_JNI_INTERNAL_OMIT_BRACES, _, args))>; \
   89        static auto methodId = e->GetStaticMethodID(clazz, #name, signature);    \
   90        if (methodId == 0) {                          \
   91            throw AException("no such static jni method: {} {}"_format(#name, signature)); \
   92        }                                         \
   93        return ::aui::jni::callStaticMethod<ret_t>(clazz, methodId AUI_PP_FOR_EACH(AUI_JNI_INTERNAL_OMIT_BRACES_CONTENTS, _, args)); \
   94    }
   95
  117#define AUI_JNI_METHOD(ret_t, name, args) \
  118    ret_t name (AUI_PP_FOR_EACH(AUI_JNI_INTERNAL_OMIT_BRACES, _, args)) { \
  119        static_assert(::aui::jni::convertible<ret_t>, "return type is required to be convertible"); \
  120        auto clazz = getClass();                 \
  121        auto e = ::aui::jni::env();              \
  122        const char* signature = ::aui::jni::signature_v<ret_t (AUI_PP_FOR_EACH(AUI_JNI_INTERNAL_OMIT_BRACES, _, args))>; \
  123        static auto methodId = e->GetMethodID(clazz, #name, signature);    \
  124        if (methodId == 0) {                          \
  125            throw AException("no such jni method: {} {}"_format(#name, signature)); \
  126        }                                         \
  127        return ::aui::jni::callMethod<ret_t>(this->asObject(), methodId AUI_PP_FOR_EACH(AUI_JNI_INTERNAL_OMIT_BRACES_CONTENTS, _, args)); \
  128    }
  129
  130#define AUI_JNI_INTERNAL_OMIT_BRACES(i, b, c) AUI_PP_COMMA_IF(i) AUI_PP_IDENTITY c
  131
  132#define AUI_JNI_INTERNAL_OMIT_BRACES_CONTENTS(i, b, c) , AUI_PP_EMPTY c

© 2025 AUI Framework Contributors. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. All trademarks are property of their respective owners.