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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "tensor_update.h"
#include "valueupdate.h"
#include <optional>
namespace vespalib::eval { struct Value; }
namespace document {
class TensorDataType;
class TensorFieldValue;
/*
* An update for a subset of the cells in a tensor.
*
* The operand is represented as a tensor field value containing a
* mapped (aka sparse) tensor.
*/
class TensorModifyUpdate final : public ValueUpdate, public TensorUpdate {
public:
/** Declare all types of tensor modify updates. */
enum class Operation { // Operation to be applied to matching tensor cells
REPLACE = 0,
ADD = 1,
MULTIPLY = 2,
MAX_NUM_OPERATIONS = 3
};
private:
Operation _operation;
std::unique_ptr<const TensorDataType> _tensorType;
std::unique_ptr<TensorFieldValue> _tensor;
// When this is set, non-existing cells are created in the input tensor before applying the update.
std::optional<double> _default_cell_value;
friend ValueUpdate;
TensorModifyUpdate();
ACCEPT_UPDATE_VISITOR;
public:
TensorModifyUpdate(Operation operation, std::unique_ptr<TensorFieldValue> tensor);
TensorModifyUpdate(Operation operation, std::unique_ptr<TensorFieldValue> tensor, double default_cell_value);
TensorModifyUpdate(const TensorModifyUpdate &rhs) = delete;
TensorModifyUpdate &operator=(const TensorModifyUpdate &rhs) = delete;
~TensorModifyUpdate() override;
bool operator==(const ValueUpdate &other) const override;
Operation getOperation() const { return _operation; }
const TensorFieldValue &getTensor() const { return *_tensor; }
const std::optional<double>& get_default_cell_value() const { return _default_cell_value; }
void checkCompatibility(const Field &field) const override;
std::unique_ptr<vespalib::eval::Value> applyTo(const vespalib::eval::Value &tensor) const;
std::unique_ptr<Value> apply_to(const Value &tensor,
const ValueBuilderFactory &factory) const override;
bool applyTo(FieldValue &value) const override;
void printXml(XmlOutputStream &xos) const override;
void print(std::ostream &out, bool verbose, const std::string &indent) const override;
void deserialize(const DocumentTypeRepo &repo, const DataType &type, nbostream &stream) override;
};
}
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