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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* This class represents an update that removes a given field value from a
* field.
*/
#pragma once
#include "valueupdate.h"
#include <vespa/document/fieldvalue/fieldvalue.h>
namespace document {
class RemoveValueUpdate final : public ValueUpdate {
std::unique_ptr<FieldValue> _key; // The field value to remove by this update.
ACCEPT_UPDATE_VISITOR;
friend ValueUpdate;
RemoveValueUpdate() : ValueUpdate(Remove), _key() {}
public:
/**
* The default constructor requires initial values for all member variables.
*
* @param value The identifier of the field value to update.
*/
explicit RemoveValueUpdate(std::unique_ptr<FieldValue> key);
RemoveValueUpdate(const RemoveValueUpdate &) = delete;
RemoveValueUpdate & operator=(const RemoveValueUpdate &) = delete;
~RemoveValueUpdate() override;
bool operator==(const ValueUpdate& other) const override;
/**
* @return The key, whose value to remove during this update. This will be
* an IntFieldValue for arrays.
*/
const FieldValue& getKey() const { return *_key; }
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;
};
}
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