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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "aggr.h"
#include <vespa/vespalib/util/stash.h>
#include <vespa/log/log.h>
LOG_SETUP(".eval.eval.aggr");
namespace vespalib {
namespace eval {
namespace {
template <typename T>
struct Wrapper : Aggregator {
T aggr;
virtual void first(double value) final override { aggr = T{value}; }
virtual void next(double value) final override { aggr.sample(value); }
virtual double result() const final override { return aggr.result(); }
virtual Aggr enum_value() const final override { return T::enum_value(); }
};
} // namespace vespalib::eval::<unnamed>
const AggrNames AggrNames::_instance;
void
AggrNames::add(Aggr aggr, const vespalib::string &name)
{
_name_aggr_map[name] = aggr;
_aggr_name_map[aggr] = name;
}
AggrNames::AggrNames()
: _name_aggr_map(),
_aggr_name_map()
{
add(Aggr::AVG, "avg");
add(Aggr::COUNT, "count");
add(Aggr::PROD, "prod");
add(Aggr::SUM, "sum");
add(Aggr::MAX, "max");
add(Aggr::MEDIAN, "median");
add(Aggr::MIN, "min");
}
const vespalib::string *
AggrNames::name_of(Aggr aggr)
{
const auto &map = _instance._aggr_name_map;
auto result = map.find(aggr);
if (result == map.end()) {
return nullptr;
}
return &(result->second);
}
const Aggr *
AggrNames::from_name(const vespalib::string &name)
{
const auto &map = _instance._name_aggr_map;
auto result = map.find(name);
if (result == map.end()) {
return nullptr;
}
return &(result->second);
}
Aggregator::~Aggregator()
{
}
Aggregator &
Aggregator::create(Aggr aggr, Stash &stash)
{
return TypifyAggr::resolve(aggr, [&stash](auto t)->Aggregator&
{
using T = typename decltype(t)::template templ<double>;
return stash.create<Wrapper<T>>();
});
}
std::vector<Aggr>
Aggregator::list()
{
return std::vector<Aggr>({ Aggr::AVG, Aggr::COUNT, Aggr::PROD,
Aggr::SUM, Aggr::MAX, Aggr::MEDIAN,
Aggr::MIN });
}
} // namespace vespalib::eval
} // namespace vespalib
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