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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "updatevisitor.h"
#include <vespa/document/base/fieldpath.h>
#include <vespa/document/util/identifiableid.h>
namespace document {
class DocumentTypeRepo;
class Field;
class FieldValue;
class BucketIdFactory;
class Document;
class DataType;
namespace select { class Node; }
namespace fieldvalue { class IteratorHandler; }
class FieldPathUpdate
{
public:
using nbostream = vespalib::nbostream;
using stringref = vespalib::stringref;
enum FieldPathUpdateType {
Add = IDENTIFIABLE_CLASSID(AddFieldPathUpdate),
Assign = IDENTIFIABLE_CLASSID(AssignFieldPathUpdate),
Remove = IDENTIFIABLE_CLASSID(RemoveFieldPathUpdate)
};
virtual ~FieldPathUpdate();
FieldPathUpdateType type() const noexcept { return _type; }
void applyTo(Document& doc) const;
virtual bool operator==(const FieldPathUpdate& other) const;
bool operator!=(const FieldPathUpdate& other) const {
return ! (*this == other);
}
const vespalib::string& getOriginalFieldPath() const { return _originalFieldPath; }
const vespalib::string& getOriginalWhereClause() const { return _originalWhereClause; }
/**
* Check that a given field value is of the type inferred by
* the field path.
* @throws IllegalArgumentException upon datatype mismatch.
*/
void checkCompatibility(const FieldValue& fv, const DataType & type) const;
virtual void print(std::ostream& out, bool verbose, const std::string& indent) const = 0;
virtual void accept(UpdateVisitor &visitor) const = 0;
virtual uint8_t getSerializedType() const = 0;
/** Deserializes and creates a new FieldPathUpdate instance.
* Requires type id to be not yet consumed.
*/
static std::unique_ptr<FieldPathUpdate> createInstance(const DocumentTypeRepo& repo, const DataType &type, nbostream & stream);
protected:
/** To be used for deserialization */
FieldPathUpdate(FieldPathUpdateType type) noexcept;
FieldPathUpdate(const FieldPathUpdate &);
FieldPathUpdate & operator =(const FieldPathUpdate &);
static stringref getString(nbostream & stream);
FieldPathUpdate(FieldPathUpdateType type, stringref fieldPath, stringref whereClause = stringref());
virtual void deserialize(const DocumentTypeRepo& repo, const DataType& type, nbostream & stream);
/** @return the datatype of the last path element in the field path */
const DataType& getResultingDataType(const FieldPath & path) const;
enum SerializedMagic {AssignMagic=0, RemoveMagic=1, AddMagic=2};
private:
// TODO: rename to createIteratorHandler?
virtual std::unique_ptr<fieldvalue::IteratorHandler> getIteratorHandler(Document& doc, const DocumentTypeRepo & repo) const = 0;
FieldPathUpdateType _type;
vespalib::string _originalFieldPath;
vespalib::string _originalWhereClause;
};
}
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