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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* @class document::AddValueUpdate
* @ingroup document
*
* @brief Represents an update that specifies an addition to a field value.
*/
#pragma once
#include <vespa/document/fieldvalue/fieldvalue.h>
#include <vespa/document/update/valueupdate.h>
namespace document {
class AddValueUpdate : public ValueUpdate {
FieldValue::CP _value; // The field value to add by this update.
int _weight; // The weight to assign to the contained value.
// Used by ValueUpdate's static factory function
// Private because it generates an invalid object.
friend class ValueUpdate;
AddValueUpdate() : ValueUpdate(), _value(0), _weight(1) {}
ACCEPT_UPDATE_VISITOR;
public:
typedef std::unique_ptr<AddValueUpdate> UP;
/**
* The default constructor requires initial values for all member variables.
*
* @param value The field value to add.
* @param weight The weight for the field value.
*/
AddValueUpdate(const FieldValue& value, int weight = 1);
~AddValueUpdate();
bool operator==(const ValueUpdate& other) const override;
/** @return the field value to add during this update. */
const FieldValue& getValue() const { return *_value; }
/** @return The weight to assign to the value of this. */
int getWeight() const { return _weight; }
/**
* Sets the field value to add during this update.
*
* @param value The new field value.
* @return A reference to this object so you can chain calls.
*/
AddValueUpdate& setValue(const FieldValue& value) {
_value.reset(value.clone());
return *this;
}
/**
* Sets the weight to assign to the value of this.
*
* @return A reference to this object so you can chain calls.
*/
AddValueUpdate& setWeight(int weight) {
_weight = weight;
return *this;
}
// ValueUpdate implementation
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,
ByteBuffer& buffer, uint16_t version) override;
AddValueUpdate* clone() const override { return new AddValueUpdate(*this); }
DECLARE_IDENTIFIABLE(AddValueUpdate);
};
} // document
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