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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/document/base/globalid.h>
#include <vespa/vespalib/datastore/entryref.h>
namespace search::attribute {
/*
* Class representing a single reference in a reference attribute.
*/
class Reference {
using EntryRef = vespalib::datastore::EntryRef;
using GlobalId = document::GlobalId;
GlobalId _gid;
mutable uint32_t _lid; // target lid
mutable EntryRef _revMapIdx; // map from gid to lids referencing gid
public:
Reference()
: _gid(),
_lid(0u),
_revMapIdx()
{
}
Reference(const GlobalId &gid_)
: _gid(gid_),
_lid(0u),
_revMapIdx()
{
}
bool operator < (const Reference &rhs) const {
return _gid < rhs._gid;
}
bool operator == (const Reference &rhs) const {
return _gid == rhs._gid;
}
const GlobalId &gid() const { return _gid; }
uint32_t lid() const { return _lid; }
EntryRef revMapIdx() const { return _revMapIdx; }
void setLid(uint32_t targetLid) const { _lid = targetLid; }
void setRevMapIdx(EntryRef newRevMapIdx) const { _revMapIdx = newRevMapIdx; }
size_t hash() const noexcept {
GlobalId::hash hasher;
return hasher(_gid);
}
};
}
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