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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 "tensor_attribute.h"
#include "tensor_buffer_store.h"
namespace search::tensor {
/**
* Attribute vector class storing serialized tensors for all documents in memory.
*
* When fetching a tensor with getTensor(docId) the returned Value
* will have a FastValueIndex (constructed on the fly) for its sparse
* mapping, but refer to a common type, while cells() will refer to
* memory in the serialized store without copying.
*
*/
class SerializedFastValueAttribute : public TensorAttribute {
vespalib::eval::ValueType _tensor_type;
TensorBufferStore _tensorBufferStore; // data store for serialized tensors
public:
SerializedFastValueAttribute(vespalib::stringref baseFileName, const Config &cfg);
~SerializedFastValueAttribute() override;
void setTensor(DocId docId, const vespalib::eval::Value &tensor) override;
std::unique_ptr<vespalib::eval::Value> getTensor(DocId docId) const override;
bool onLoad(vespalib::Executor *executor) override;
std::unique_ptr<AttributeSaver> onInitSave(vespalib::stringref fileName) override;
};
}
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