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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 <vespa/searchlib/util/file_with_header.h>
#include <vespa/searchlib/util/fileutil.h>
namespace search {
class AttributeVector;
class ReaderBase
{
public:
ReaderBase(AttributeVector & attr);
virtual ~ReaderBase();
void rewind();
bool hasWeight() const;
bool hasIdx() const;
bool hasData() const;
uint32_t getNumIdx() const {
return (_idxFile.data_size()) /sizeof(uint32_t);
}
size_t getEnumCount() const;
size_t getNumValues();
int32_t getNextWeight() { return _weightReader.readHostOrder(); }
uint32_t getNextEnum() { return _enumReader.readHostOrder(); }
bool getEnumerated() const { return _enumerated; }
uint32_t getNextValueCount();
int64_t getCreateSerialNum() const { return _createSerialNum; }
bool getHasLoadData() const { return _hasLoadData; }
uint32_t getVersion() const { return _version; }
uint32_t getDocIdLimit() const { return _docIdLimit; }
const vespalib::GenericHeader &getDatHeader() const {
return _datFile.header();
}
protected:
FileWithHeader _datFile;
private:
FileWithHeader _weightFile;
FileWithHeader _idxFile;
FileReader<int32_t> _weightReader;
FileReader<uint32_t> _idxReader;
FileReader<uint32_t> _enumReader;
uint32_t _currIdx;
uint64_t _createSerialNum;
size_t _fixedWidth;
bool _enumerated;
bool _hasLoadData;
uint32_t _version;
uint32_t _docIdLimit;
protected:
size_t getDataCountHelper(size_t elemSize) const {
size_t dataSize = _datFile.data_size();
return dataSize / elemSize;
}
};
}
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