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// Copyright 2015 The Chromium Authors
// 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/component_export.h"
#include "base/memory/scoped_refptr.h"
#include "storage/browser/blob/blob_data_item.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 COMPONENT_EXPORT(STORAGE_BROWSER) BlobDataSnapshot {
public:
BlobDataSnapshot(const BlobDataSnapshot& other);
~BlobDataSnapshot();
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;
friend COMPONENT_EXPORT(STORAGE_BROWSER) void PrintTo(
const BlobDataSnapshot& x,
::std::ostream* os);
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_;
};
#if defined(UNIT_TEST)
inline bool operator==(const BlobDataSnapshot& a, const BlobDataSnapshot& b) {
if (a.content_type() != b.content_type()) {
return false;
}
if (a.content_disposition() != b.content_disposition()) {
return false;
}
if (a.items().size() != b.items().size()) {
return false;
}
for (size_t i = 0; i < a.items().size(); ++i) {
if (*(a.items()[i]) != *(b.items()[i]))
return false;
}
return true;
}
#endif // defined(UNIT_TEST)
} // namespace storage
#endif // STORAGE_BROWSER_BLOB_BLOB_DATA_SNAPSHOT_H_
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