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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "attributenode.h"
namespace search::expression {
/**
* Extract map value from attribute for the map key specified in the
* grouping expression.
*/
class AttributeMapLookupNode : public AttributeNode
{
public:
using IAttributeVector = search::attribute::IAttributeVector;
class KeyHandler;
private:
vespalib::string _keyAttributeName;
vespalib::string _valueAttributeName;
vespalib::string _key;
vespalib::string _keySourceAttributeName;
const IAttributeVector *_keyAttribute;
const IAttributeVector *_keySourceAttribute;
std::unique_ptr<KeyHandler> makeKeyHandlerHelper() const;
std::unique_ptr<KeyHandler> makeKeyHandler() const;
void cleanup() override;
void wireAttributes(const search::attribute::IAttributeContext & attrCtx) override;
std::pair<std::unique_ptr<ResultNode>, std::unique_ptr<Handler>>
createResultHandler(bool preserveAccurateType, const attribute::IAttributeVector & attribute) const override;
public:
DECLARE_NBO_SERIALIZE;
DECLARE_EXPRESSIONNODE(AttributeMapLookupNode);
AttributeMapLookupNode();
AttributeMapLookupNode(vespalib::stringref name, vespalib::stringref keyAttributeName, vespalib::stringref valueAttributeName, vespalib::stringref key, vespalib::stringref keySourceAttributeName);
AttributeMapLookupNode(const AttributeMapLookupNode &);
AttributeMapLookupNode(AttributeMapLookupNode &&) = delete;
~AttributeMapLookupNode() override;
AttributeMapLookupNode &operator=(const AttributeMapLookupNode &rhs);
AttributeMapLookupNode &operator=(AttributeMapLookupNode &&rhs) = delete;
void visitMembers(vespalib::ObjectVisitor &visitor) const override;
};
}
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