transform_function.h

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/*
 * 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 "iceberg/transform.h"
 
namespace iceberg {
class ICEBERG_EXPORT IdentityTransform : public TransformFunction {
 public:
  explicit IdentityTransform(std::shared_ptr<Type> const& source_type);
 
  Result<Literal> Transform(const Literal& literal) override;
 
  std::shared_ptr<Type> ResultType() const override;
 
  static Result<std::unique_ptr<TransformFunction>> Make(
      std::shared_ptr<Type> const& source_type);
};
 
class ICEBERG_EXPORT BucketTransform : public TransformFunction {
 public:
  BucketTransform(std::shared_ptr<Type> const& source_type, int32_t num_buckets);
 
  Result<Literal> Transform(const Literal& literal) override;
 
  std::shared_ptr<Type> ResultType() const override;
 
  int32_t num_buckets() const { return num_buckets_; }
 
  static Result<std::unique_ptr<TransformFunction>> Make(
      std::shared_ptr<Type> const& source_type, int32_t num_buckets);
 
 private:
  [[nodiscard]] bool Equals(const TransformFunction& other) const override;
 
  int32_t num_buckets_;
};
 
class ICEBERG_EXPORT TruncateTransform : public TransformFunction {
 public:
  TruncateTransform(std::shared_ptr<Type> const& source_type, int32_t width);
 
  Result<Literal> Transform(const Literal& literal) override;
 
  std::shared_ptr<Type> ResultType() const override;
 
  int32_t width() const { return width_; }
 
  static Result<std::unique_ptr<TransformFunction>> Make(
      std::shared_ptr<Type> const& source_type, int32_t width);
 
 private:
  [[nodiscard]] bool Equals(const TransformFunction& other) const override;
 
  int32_t width_;
};
 
class ICEBERG_EXPORT YearTransform : public TransformFunction {
 public:
  explicit YearTransform(std::shared_ptr<Type> const& source_type);
 
  Result<Literal> Transform(const Literal& literal) override;
 
  std::shared_ptr<Type> ResultType() const override;
 
  static Result<std::unique_ptr<TransformFunction>> Make(
      std::shared_ptr<Type> const& source_type);
};
 
class ICEBERG_EXPORT MonthTransform : public TransformFunction {
 public:
  explicit MonthTransform(std::shared_ptr<Type> const& source_type);
 
  Result<Literal> Transform(const Literal& literal) override;
 
  std::shared_ptr<Type> ResultType() const override;
 
  static Result<std::unique_ptr<TransformFunction>> Make(
      std::shared_ptr<Type> const& source_type);
};
 
class ICEBERG_EXPORT DayTransform : public TransformFunction {
 public:
  explicit DayTransform(std::shared_ptr<Type> const& source_type);
 
  Result<Literal> Transform(const Literal& literal) override;
 
  std::shared_ptr<Type> ResultType() const override;
 
  static Result<std::unique_ptr<TransformFunction>> Make(
      std::shared_ptr<Type> const& source_type);
};
 
class ICEBERG_EXPORT HourTransform : public TransformFunction {
 public:
  explicit HourTransform(std::shared_ptr<Type> const& source_type);
 
  Result<Literal> Transform(const Literal& literal) override;
 
  std::shared_ptr<Type> ResultType() const override;
 
  static Result<std::unique_ptr<TransformFunction>> Make(
      std::shared_ptr<Type> const& source_type);
};
 
class ICEBERG_EXPORT VoidTransform : public TransformFunction {
 public:
  explicit VoidTransform(std::shared_ptr<Type> const& source_type);
 
  Result<Literal> Transform(const Literal& literal) override;
 
  std::shared_ptr<Type> ResultType() const override;
 
  static Result<std::unique_ptr<TransformFunction>> Make(
      std::shared_ptr<Type> const& source_type);
};
 
}  // namespace iceberg