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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/searchlib/fef/featureexecutor.h>
#include <vespa/eval/eval/tensor_spec.h>
#include <vespa/eval/eval/value.h>
#include <vespa/eval/eval/value_type.h>
#include <vespa/eval/eval/fast_value.h>
#include <vespa/eval/eval/value_codec.h>
#include <vespa/vespalib/util/stash.h>
namespace search::features {
/**
* Feature executor that returns a constant tensor.
*/
class ConstantTensorExecutor : public fef::FeatureExecutor
{
private:
vespalib::eval::Value::UP _tensor;
public:
ConstantTensorExecutor(vespalib::eval::Value::UP tensor)
: _tensor(std::move(tensor))
{}
bool isPure() override { return true; }
void execute(uint32_t) override {
outputs().set_object(0, *_tensor);
}
static fef::FeatureExecutor &create(std::unique_ptr<vespalib::eval::Value> tensor, vespalib::Stash &stash) {
return stash.create<ConstantTensorExecutor>(std::move(tensor));
}
static fef::FeatureExecutor &createEmpty(const vespalib::eval::ValueType &valueType, vespalib::Stash &stash) {
const auto &factory = vespalib::eval::FastValueBuilderFactory::get();
auto spec = vespalib::eval::TensorSpec(valueType.to_spec());
return stash.create<ConstantTensorExecutor>(vespalib::eval::value_from_spec(spec, factory));
}
static fef::FeatureExecutor &createEmpty(vespalib::Stash &stash) {
return createEmpty(vespalib::eval::ValueType::double_type(), stash);
}
};
/**
* Feature executor that returns a constant tensor.
*/
class ConstantTensorRefExecutor : public fef::FeatureExecutor
{
private:
const vespalib::eval::Value &_tensor_ref;
public:
ConstantTensorRefExecutor(const vespalib::eval::Value &tensor_ref)
: _tensor_ref(tensor_ref) {}
bool isPure() final override { return true; }
void execute(uint32_t) final override {
outputs().set_object(0, _tensor_ref);
}
};
}
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