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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 STORAGE_BROWSER_BLOB_BLOB_DATA_SNAPSHOT_H_
#define STORAGE_BROWSER_BLOB_BLOB_DATA_SNAPSHOT_H_
#include <stddef.h>
#include <string>
#include <vector>
#include "base/memory/ref_counted.h"
#include "base/supports_user_data.h"
#include "storage/browser/blob/blob_data_item.h"
#include "storage/browser/storage_browser_export.h"
namespace storage {
class BlobDataBuilder;
// Snapshot of a Blob. This snapshot holds a refcount of the current
// blob item resources so the backing storage for these items will stick
// around for the lifetime of this object. (The data represented by a blob is
// immutable, but the backing store can change). Keeping this object alive
// guarantees that the resources stay alive, but it does not guarentee that
// the blob stays alive. Use the BlobDataHandle to keep a blob alive.
// This class must be deleted on the IO thread.
class STORAGE_EXPORT BlobDataSnapshot : public base::SupportsUserData::Data {
public:
BlobDataSnapshot(const BlobDataSnapshot& other);
~BlobDataSnapshot() override;
const std::vector<scoped_refptr<BlobDataItem>>& items() const {
return items_;
}
const std::string& content_type() const { return content_type_; }
const std::string& content_disposition() const {
return content_disposition_;
}
size_t GetMemoryUsage() const;
const std::string& uuid() const { return uuid_; }
private:
friend class BlobDataBuilder;
friend class BlobStorageContext;
BlobDataSnapshot(const std::string& uuid,
const std::string& content_type,
const std::string& content_disposition);
BlobDataSnapshot(const std::string& uuid,
const std::string& content_type,
const std::string& content_disposition,
const std::vector<scoped_refptr<BlobDataItem>>& items);
const std::string uuid_;
const std::string content_type_;
const std::string content_disposition_;
// Non-const for constrution in BlobStorageContext
std::vector<scoped_refptr<BlobDataItem>> items_;
};
} // namespace storage
#endif // STORAGE_BROWSER_BLOB_BLOB_DATA_SNAPSHOT_H_
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