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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SYNC_API_DATA_BATCH_H_
#define SYNC_API_DATA_BATCH_H_
#include <algorithm>
#include <string>
#include <utility>
#include "base/memory/scoped_ptr.h"
#include "sync/api/entity_data.h"
#include "sync/base/sync_export.h"
namespace syncer_v2 {
typedef std::pair<std::string, scoped_ptr<EntityData>> TagAndData;
// Interface used by the processor to read data requested from the service.
class SYNC_EXPORT DataBatch {
public:
DataBatch() {}
virtual ~DataBatch() {}
// Returns if the data batch has another pair or not.
virtual bool HasNext() const = 0;
// Returns a pair of storage tag and owned entity data object. Invoking this
// method will remove the pair from the batch, and should not be called if
// HasNext() returns false.
virtual TagAndData Next() = 0;
};
} // namespace syncer_v2
#endif // SYNC_API_DATA_BATCH_H_