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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 */
#ifndef mozilla_jni_GeckoResultUtils_h
#define mozilla_jni_GeckoResultUtils_h
#include "mozilla/java/GeckoResultNatives.h"
#include "mozilla/jni/Conversions.h"
namespace mozilla {
namespace jni {
// C++-side object bound to Java's GeckoResult.GeckoCallback.
// Note that we can't template this class because that breaks JNI dispatch
// (surprisingly: it compiles, but selects the wrong method specialization
// during dispatch). So instead we use a templated factory function, which
// bundles the per-ArgType conversion logic into the callback.
class GeckoResultCallback final
: public java::GeckoResult::GeckoCallback::Natives<GeckoResultCallback> {
typedef java::GeckoResult::GeckoCallback::Natives<GeckoResultCallback> Base;
typedef std::function<void(mozilla::jni::Object::Param)> OuterCallback;
void Call(mozilla::jni::Object::Param aArg) { mCallback(aArg); }
template <typename ArgType>
static java::GeckoResult::GeckoCallback::LocalRef CreateAndAttach(
std::function<void(ArgType)>&& aInnerCallback) {
auto java = java::GeckoResult::GeckoCallback::New();
OuterCallback outerCallback =
[inner{std::move(aInnerCallback)}](mozilla::jni::Object::Param aParam) {
ArgType converted = Java2Native<ArgType>(aParam);
auto native = MakeUnique<GeckoResultCallback>(std::move(outerCallback));
Base::AttachNative(java, std::move(native));
return java;
explicit GeckoResultCallback(OuterCallback&& aCallback)
: mCallback(std::move(aCallback)) {}
OuterCallback mCallback;
} // namespace jni
} // namespace mozilla
#endif // mozilla_jni_GeckoResultUtils_h