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34 lines
850 B
C++
34 lines
850 B
C++
#pragma once
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#include <DB/IO/ReadBuffer.h>
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#include <DB/DataStreams/IProfilingBlockInputStream.h>
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#include <memory>
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namespace DB
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{
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/** Provides reading from a Buffer, taking exclusive ownership over it's lifetime,
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* simplifies usage of ReadBufferFromFile (no need to manage buffer lifetime) etc.
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*/
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class OwningBufferBlockInputStream : public IProfilingBlockInputStream
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{
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public:
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OwningBufferBlockInputStream(const BlockInputStreamPtr & stream, std::unique_ptr<ReadBuffer> buffer)
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: stream{stream}, buffer{std::move(buffer)}
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{
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children.push_back(stream);
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}
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private:
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Block readImpl() override { return stream->read(); }
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String getName() const override { return "OwningBuffer"; }
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String getID() const override { return "OwningBuffer(" + stream->getID() + ")"; }
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BlockInputStreamPtr stream;
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std::unique_ptr<ReadBuffer> buffer;
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};
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}
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