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#pragma clang system_header
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
#pragma once
#include <cstdint>
#include <limits>
#include <memory>
#include <optional>
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/compute/api_aggregate.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/compute/type_fwd.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/result.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/status.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/type_fwd.h"
namespace arrow20::compute::internal {
using PivotWiderKeyIndex = uint32_t;
constexpr PivotWiderKeyIndex kMaxPivotKey =
std::numeric_limits<PivotWiderKeyIndex>::max();
struct PivotWiderKeyMapper {
virtual ~PivotWiderKeyMapper() = default;
virtual Result<std::shared_ptr<ArrayData>> MapKeys(const ArraySpan&) = 0;
virtual Result<std::optional<PivotWiderKeyIndex>> MapKey(const Scalar&) = 0;
static Result<std::unique_ptr<PivotWiderKeyMapper>> Make(
const DataType& key_type, const PivotWiderOptions* options, ExecContext* ctx);
};
} // namespace arrow20::compute::internal
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