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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* @class document::MapValueUpdate
* @ingroup document
*
* @brief This class is intended to map a value update to a part of a collection
* field value.
*
* Note that the key must be an IntFieldValue in case of an array. For a
* weighted set it must match the nested type of the weighted set.
*/
#pragma once
#include "valueupdate.h"
#include <vespa/document/fieldvalue/fieldvalue.h>
namespace document {
class MapValueUpdate final : public ValueUpdate {
public:
/**
* The default constructor requires a value for this object's value and
* update member.
*
* @param key The identifier of the field value to be updated.
* @param update The update to map to apply to the field value of this.
*/
MapValueUpdate(std::unique_ptr<FieldValue> key, std::unique_ptr<ValueUpdate> update);
MapValueUpdate(const MapValueUpdate &) = delete;
MapValueUpdate & operator = (const MapValueUpdate &) = delete;
MapValueUpdate(MapValueUpdate &&) = default;
MapValueUpdate & operator = (MapValueUpdate &&) = default;
~MapValueUpdate() override;
bool operator==(const ValueUpdate& other) const override;
const FieldValue& getKey() const { return *_key; }
FieldValue& getKey() { return *_key; }
const ValueUpdate& getUpdate() const { return *_update; }
ValueUpdate& getUpdate() { return *_update; }
/**
* Sets the update to apply to the value update of this.
*
* @param update The value update.
* @return A pointer to this.
*/
MapValueUpdate& setUpdate(std::unique_ptr<ValueUpdate> update) {
_update = std::move(update);
return *this;
}
void checkCompatibility(const Field& field) 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& buffer) override;
private:
std::unique_ptr<FieldValue> _key; // The field value this update is mapping to.
std::unique_ptr<ValueUpdate> _update; //The update to apply to the value member of this.
// Used by ValueUpdate's static factory function
// Private because it generates an invalid object.
friend class ValueUpdate;
MapValueUpdate() : ValueUpdate(Map), _key(), _update() {}
ACCEPT_UPDATE_VISITOR;
};
}
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