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#pragma once
#include <IO/WriteBuffer.h>
#include <IO/IReadableWriteBuffer.h>
#include <IO/WriteBufferFromFile.h>
#include <Common/filesystemHelpers.h>
namespace DB
{
class TemporaryFileOnDisk;
using TemporaryFileOnDiskHolder = std::unique_ptr<TemporaryFileOnDisk>;
/// Rereadable WriteBuffer, could be used as disk buffer
/// Creates unique temporary in directory (and directory itself)
class WriteBufferFromTemporaryFile : public WriteBufferFromFile, public IReadableWriteBuffer
{
public:
explicit WriteBufferFromTemporaryFile(TemporaryFileOnDiskHolder && tmp_file_);
~WriteBufferFromTemporaryFile() override;
private:
std::shared_ptr<ReadBuffer> getReadBufferImpl() override;
TemporaryFileOnDiskHolder tmp_file;
friend class ReadBufferFromTemporaryWriteBuffer;
};
}
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