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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "iattributesavetarget.h"
#include "attributefilewriter.h"
#include <vespa/vespalib/stllike/hash_fun.h>
#include <unordered_map>
namespace search {
/**
* Class used to save an attribute vector to file(s).
**/
class AttributeFileSaveTarget : public IAttributeSaveTarget {
private:
using FileWriterUP = std::unique_ptr<AttributeFileWriter>;
using WriterMap = std::unordered_map<vespalib::string, FileWriterUP, vespalib::hash<vespalib::string>>;
const TuneFileAttributes& _tune_file;
const search::common::FileHeaderContext& _file_header_ctx;
AttributeFileWriter _datWriter;
AttributeFileWriter _idxWriter;
AttributeFileWriter _weightWriter;
AttributeFileWriter _udatWriter;
WriterMap _writers;
public:
AttributeFileSaveTarget(const TuneFileAttributes& tune_file,
const search::common::FileHeaderContext& file_header_ctx);
~AttributeFileSaveTarget() override;
// Implements IAttributeSaveTarget
/** Setups this saveTarget by opening the relevant files **/
bool setup() override;
/** Closes the files used **/
void close() override;
IAttributeFileWriter &datWriter() override;
IAttributeFileWriter &idxWriter() override;
IAttributeFileWriter &weightWriter() override;
IAttributeFileWriter &udatWriter() override;
bool setup_writer(const vespalib::string& file_suffix,
const vespalib::string& desc) override;
IAttributeFileWriter& get_writer(const vespalib::string& file_suffix) override;
};
} // namespace search
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