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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 "streamed_value_index.h"
#include <vespa/eval/eval/value_type.h>
#include <vespa/eval/eval/value.h>
#include <vespa/vespalib/util/shared_string_repo.h>
#include <cassert>
namespace vespalib::eval {
/**
* A very simple Value implementation.
* Cheap to construct from serialized data,
* and cheap to serialize or iterate through.
* Slow for full or partial lookups.
**/
template <typename T>
class StreamedValue : public Value
{
private:
using Handles = SharedStringRepo::Handles;
ValueType _type;
std::vector<T> _my_cells;
Handles _my_labels;
StreamedValueIndex _my_index;
public:
StreamedValue(ValueType type, size_t num_mapped_dimensions,
std::vector<T> cells, size_t num_subspaces, Handles && handles)
: _type(std::move(type)),
_my_cells(std::move(cells)),
_my_labels(std::move(handles)),
_my_index(num_mapped_dimensions,
num_subspaces,
_my_labels.view())
{
assert(num_subspaces * _type.dense_subspace_size() == _my_cells.size());
}
~StreamedValue();
const ValueType &type() const final override { return _type; }
TypedCells cells() const final override { return TypedCells(_my_cells); }
const Value::Index &index() const final override { return _my_index; }
MemoryUsage get_memory_usage() const final override;
};
} // namespace
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