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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "singleenumattributesaver.h"
#include "iattributesavetarget.h"
#include <vespa/searchlib/util/bufferwriter.h>
using search::attribute::EntryRefVector;
using vespalib::GenerationHandler;
namespace search {
SingleValueEnumAttributeSaver::
SingleValueEnumAttributeSaver(GenerationHandler::Guard &&guard,
const attribute::AttributeHeader &header,
EntryRefVector &&indices,
IEnumStore &enumStore)
: AttributeSaver(std::move(guard), header),
_indices(std::move(indices)),
_enumSaver(enumStore)
{
}
SingleValueEnumAttributeSaver::~SingleValueEnumAttributeSaver() = default;
bool
SingleValueEnumAttributeSaver::onSave(IAttributeSaveTarget &saveTarget)
{
_enumSaver.writeUdat(saveTarget);
std::unique_ptr<search::BufferWriter> datWriter(saveTarget.datWriter().allocBufferWriter());
assert(saveTarget.getEnumerated());
auto &enumerator = _enumSaver.get_enumerator();
enumerator.enumerateValues();
for (auto ref : _indices) {
uint32_t enumValue = enumerator.mapEntryRefToEnumValue(ref);
assert(enumValue != 0u);
// Enumerator enumerates known entry refs (based on dictionary tree)
// to values >= 1, but file format starts enumeration at 0.
--enumValue;
datWriter->write(&enumValue, sizeof(uint32_t));
}
datWriter->flush();
_enumSaver.clear();
return true;
}
} // namespace search
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