device/nfc/nfc_adapter_factory.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef DEVICE_NFC_NFC_ADAPTER_FACTORY_H_
   6 #define DEVICE_NFC_NFC_ADAPTER_FACTORY_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "device/nfc/nfc_adapter.h"
  11
  12 namespace device {
  13
  14 // NfcAdapterFactory is a class that contains static methods, which
  15 // instantiate either a specific NFC adapter, or the generic "default
  16 // adapter" which may change depending on availability.
  17 class NfcAdapterFactory {
  18  public:
  19   typedef base::Callback<void(scoped_refptr<NfcAdapter>)> AdapterCallback;
  20
  21   // Returns true if NFC is available for the current platform.
  22   static bool IsNfcAvailable();
  23
  24   // Returns the shared instance of the default adapter, creating and
  25   // initializing it if necessary. |callback| is called with the adapter
  26   // instance passed only once the adapter is fully initialized and ready to
  27   // use.
  28   static void GetAdapter(const AdapterCallback& callback);
  29 };
  30
  31 }  // namespace device
  32
  33 #endif  // DEVICE_NFC_NFC_ADAPTER_FACTORY_H_