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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 "iattributefilewriter.h"
#include "attribute_header.h"
namespace search {
/**
* Interface used for saving an attribute vector.
**/
class IAttributeSaveTarget {
public:
using Buffer = IAttributeFileWriter::Buffer;
protected:
attribute::AttributeHeader _header;
public:
IAttributeSaveTarget() : _header() {}
void setHeader(const attribute::AttributeHeader & header) { _header = header; }
const attribute::AttributeHeader & getHeader() const { return _header; }
bool getEnumerated() const { return _header.getEnumerated(); }
/**
* Setups this saveTarget before any data is written. Returns true
* on success.
**/
virtual bool setup() = 0;
/**
* Closes this saveTarget when all data is written.
**/
virtual void close() = 0;
virtual IAttributeFileWriter &datWriter() = 0;
virtual IAttributeFileWriter &idxWriter() = 0;
virtual IAttributeFileWriter &weightWriter() = 0;
virtual IAttributeFileWriter &udatWriter() = 0;
/**
* Setups a custom file writer with the given file suffix and description in the file header.
* Returns false if the file writer cannot be setup or if it already exists, true otherwise.
*/
virtual bool setup_writer(const vespalib::string& file_suffix,
const vespalib::string& desc) = 0;
/**
* Returns the file writer with the given file suffix.
* Throws vespalib::IllegalArgumentException if the file writer does not exists.
*/
virtual IAttributeFileWriter& get_writer(const vespalib::string& file_suffix) = 0;
virtual ~IAttributeSaveTarget();
};
} // namespace search
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