dictionary_column_view.hpp

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/*
 * Copyright (c) 2020-2022, NVIDIA CORPORATION.
 *
 * Licensed 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 <cudf/column/column.hpp>
#include <cudf/column/column_view.hpp>
 
namespace cudf {
class dictionary_column_view : private column_view {
 public:
  dictionary_column_view(column_view const& dictionary_column);
  dictionary_column_view(dictionary_column_view&&)      = default;  
  dictionary_column_view(dictionary_column_view const&) = default;  
  ~dictionary_column_view()                             = default;
 
  dictionary_column_view& operator=(dictionary_column_view const&) = default;
 
  dictionary_column_view& operator=(dictionary_column_view&&) = default;
 
  static constexpr size_type indices_column_index{0};
  static constexpr size_type keys_column_index{1};
 
  using column_view::has_nulls;
  using column_view::is_empty;
  using column_view::null_count;
  using column_view::null_mask;
  using column_view::offset;
  using column_view::size;
 
  [[nodiscard]] column_view parent() const noexcept;
 
  [[nodiscard]] column_view indices() const noexcept;
 
  [[nodiscard]] column_view get_indices_annotated() const noexcept;
 
  [[nodiscard]] column_view keys() const noexcept;
 
  [[nodiscard]] data_type keys_type() const noexcept;
 
  [[nodiscard]] size_type keys_size() const noexcept;
};  // end of group
 
namespace dictionary {  // defined here for doxygen output
}
 
}  // namespace cudf