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// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/vespalib/data/memory.h>
namespace search::attribute { class IAttributeVector; }
namespace vespalib::slime { struct Cursor; }
namespace search::docsummary {
/*
* This class reads values from a struct field attribute and inserts
* them into proper position in an array of struct or map of struct.
* If the value to be inserted is considered to be undefined then
* the value is not inserted.
*/
class AttributeFieldWriter
{
protected:
const vespalib::Memory _fieldName;
const search::attribute::IAttributeVector &_attr;
size_t _size;
AttributeFieldWriter(vespalib::Memory fieldName,
const search::attribute::IAttributeVector &attr);
public:
virtual ~AttributeFieldWriter();
virtual void fetch(uint32_t docId) = 0;
virtual void print(uint32_t idx, vespalib::slime::Cursor &cursor) = 0;
static std::unique_ptr<AttributeFieldWriter> create(vespalib::Memory fieldName, const search::attribute::IAttributeVector &attr);
uint32_t size() const { return _size; }
};
}
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