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47 lines
1.0 KiB
C++
47 lines
1.0 KiB
C++
#pragma once
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#include "config_formats.h"
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#if USE_PROTOBUF
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#include <memory>
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#include <unordered_map>
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#include <Core/Types.h>
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#include <boost/noncopyable.hpp>
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namespace google
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{
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namespace protobuf
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{
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class Descriptor;
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}
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}
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namespace DB
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{
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class FormatSchemaInfo;
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/** Keeps parsed google protobuf schemas parsed from files.
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* This class is used to handle the "Protobuf" input/output formats.
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*/
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class ProtobufSchemas : private boost::noncopyable
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{
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public:
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static ProtobufSchemas & instance();
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ProtobufSchemas();
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~ProtobufSchemas();
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/// Parses the format schema, then parses the corresponding proto file, and returns the descriptor of the message type.
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/// The function never returns nullptr, it throws an exception if it cannot load or parse the file.
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const google::protobuf::Descriptor * getMessageTypeForFormatSchema(const FormatSchemaInfo & info);
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private:
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class ImporterWithSourceTree;
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std::unordered_map<String, std::unique_ptr<ImporterWithSourceTree>> importers;
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};
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}
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#endif
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