/* Copyright (C) 2016-2018 Alibaba Group Holding Limited

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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distributed under the License is distributed on an "AS IS" BASIS,
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==============================================================================*/

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
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// contributors may be used to endorse or promote products derived from
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#ifndef GOOGLE_PROTOBUF_UTIL_CONVERTER_OBJECT_LOCATION_TRACKER_H__
#define GOOGLE_PROTOBUF_UTIL_CONVERTER_OBJECT_LOCATION_TRACKER_H__

#include <string>

#include <google/protobuf/stubs/common.h>
#include <google/protobuf/util/internal/location_tracker.h>

namespace google {
namespace protobuf {
namespace util {
namespace converter {

// An empty concrete implementation of LocationTrackerInterface.
class ObjectLocationTracker : public LocationTrackerInterface {
 public:
  // Creates an empty location tracker.
  ObjectLocationTracker() {}

  virtual ~ObjectLocationTracker() {}

  // Returns empty because nothing is tracked.
  virtual string ToString() const { return ""; }

 private:
  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ObjectLocationTracker);
};

}  // namespace converter
}  // namespace util
}  // namespace protobuf

}  // namespace google
#endif  // GOOGLE_PROTOBUF_UTIL_CONVERTER_OBJECT_LOCATION_TRACKER_H__
