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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_jni_TypeAdapter_h__
#define mozilla_jni_TypeAdapter_h__
#include <jni.h>
#include "mozilla/jni/Refs.h"
namespace mozilla {
namespace jni {
namespace detail {
// TypeAdapter specializations are the interfaces between native/C++ types such
// as int32_t and JNI types such as jint. The template parameter T is the native
// type, and each TypeAdapter specialization can have the following members:
//
// * Call: JNIEnv member pointer for making a method call that returns T.
// * StaticCall: JNIEnv member pointer for making a static call that returns T.
// * Get: JNIEnv member pointer for getting a field of type T.
// * StaticGet: JNIEnv member pointer for getting a static field of type T.
// * Set: JNIEnv member pointer for setting a field of type T.
// * StaticGet: JNIEnv member pointer for setting a static field of type T.
// * ToNative: static function that converts the JNI type to the native type.
// * FromNative: static function that converts the native type to the JNI type.
template <typename T>
struct TypeAdapter;
#define DEFINE_PRIMITIVE_TYPE_ADAPTER(NativeType, JNIType, JNIName) \
\
template <> \
struct TypeAdapter<NativeType> { \
using JNI##Type = JNIType; \
\
static constexpr auto Call = &JNIEnv::Call##JNIName##MethodA; \
static constexpr auto StaticCall = &JNIEnv::CallStatic##JNIName##MethodA; \
static constexpr auto Get = &JNIEnv::Get##JNIName##Field; \
static constexpr auto StaticGet = &JNIEnv::GetStatic##JNIName##Field; \
static constexpr auto Set = &JNIEnv::Set##JNIName##Field; \
static constexpr auto StaticSet = &JNIEnv::SetStatic##JNIName##Field; \
static constexpr auto GetArray = &JNIEnv::Get##JNIName##ArrayRegion; \
static constexpr auto SetArray = &JNIEnv::Set##JNIName##ArrayRegion; \
static constexpr auto NewArray = &JNIEnv::New##JNIName##Array; \
\
static JNIType FromNative(JNIEnv*, NativeType val) { \
return static_cast<JNIType>(val); \
} \
static NativeType ToNative(JNIEnv*, JNIType val) { \
return static_cast<NativeType>(val); \
} \
}
DEFINE_PRIMITIVE_TYPE_ADAPTER(bool, jboolean, Boolean);
DEFINE_PRIMITIVE_TYPE_ADAPTER(int8_t, jbyte, Byte);
DEFINE_PRIMITIVE_TYPE_ADAPTER(char16_t, jchar, Char);
DEFINE_PRIMITIVE_TYPE_ADAPTER(int16_t, jshort, Short);
DEFINE_PRIMITIVE_TYPE_ADAPTER(int32_t, jint, Int);
DEFINE_PRIMITIVE_TYPE_ADAPTER(int64_t, jlong, Long);
DEFINE_PRIMITIVE_TYPE_ADAPTER(float, jfloat, Float);
DEFINE_PRIMITIVE_TYPE_ADAPTER(double, jdouble, Double);
#undef DEFINE_PRIMITIVE_TYPE_ADAPTER
} // namespace detail
} // namespace jni
} // namespace mozilla
#endif // mozilla_jni_Types_h__
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