//
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// Copyright 2015 Google, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at:
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#pragma once
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#include <functional>
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#include <memory>
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#include <base/macros.h>
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#include <bluetooth/uuid.h>
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#include "service/common/bluetooth/low_energy_constants.h"
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namespace bluetooth {
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// A BluetoothInstance represents an application's handle to an instance
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// that is registered with the underlying Bluetooth stack using a Uuid and has a
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// stack-assigned integer "instance_id" ID associated with it.
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class BluetoothInstance {
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public:
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virtual ~BluetoothInstance() = default;
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// Returns the app-specific unique ID used while registering this instance.
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virtual const Uuid& GetAppIdentifier() const = 0;
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// Returns the HAL "interface ID" assigned to this instance by the stack.
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virtual int GetInstanceId() const = 0;
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protected:
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// Constructor shouldn't be called directly as instances are meant to be
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// obtained from the factory.
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BluetoothInstance() = default;
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private:
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DISALLOW_COPY_AND_ASSIGN(BluetoothInstance);
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};
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// A BluetoothInstanceFactory provides a common interface for factory
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// classes that handle asynchronously registering a per-application instance of
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// a BluetoothInstance with the underlying stack.
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class BluetoothInstanceFactory {
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public:
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BluetoothInstanceFactory() = default;
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virtual ~BluetoothInstanceFactory() = default;
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// Callback invoked as a result of a call to RegisterInstance.
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using RegisterCallback =
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std::function<void(BLEStatus status, const Uuid& app_uuid,
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std::unique_ptr<BluetoothInstance> instance)>;
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// Registers an instance for the given unique identifier |app_uuid|.
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// On success, this asynchronously invokes |callback| with a unique pointer
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// to a BluetoothInstance whose ownership can be taken by the caller. In
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// the case of an error, the pointer will contain nullptr.
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virtual bool RegisterInstance(const Uuid& app_uuid,
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const RegisterCallback& callback) = 0;
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private:
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DISALLOW_COPY_AND_ASSIGN(BluetoothInstanceFactory);
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};
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} // namespace bluetooth
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