FM / arrow

/usr/local/lib64/python3.6/site-packages/pyarrow/include/arrow/

/usr/local/lib64/python3.6/site-packages/pyarrow/include/arrow

Name	Size	Mode	Actions
adapters/	-	0755	rm
array/	-	0755	rm
c/	-	0755	rm
compute/	-	0755	rm
csv/	-	0755	rm
dataset/	-	0755	rm
filesystem/	-	0755	rm
flight/	-	0755	rm
io/	-	0755	rm
ipc/	-	0755	rm
json/	-	0755	rm
python/	-	0755	rm
tensor/	-	0755	rm
testing/	-	0755	rm
util/	-	0755	rm
vendored/	-	0755	rm
api.h	2290	0644	edit dl rm
array.h	1822	0644	edit dl rm
buffer.h	19493	0644	edit dl rm
buffer_builder.h	16430	0644	edit dl rm
builder.h	1481	0644	edit dl rm
chunked_array.h	9361	0644	edit dl rm
compare.h	5165	0644	edit dl rm
config.h	2267	0644	edit dl rm
datum.h	8980	0644	edit dl rm
device.h	8771	0644	edit dl rm
extension_type.h	6284	0644	edit dl rm
memory_pool.h	6294	0644	edit dl rm
memory_pool_test.h	2694	0644	edit dl rm
pch.h	1286	0644	edit dl rm
pretty_print.h	4182	0644	edit dl rm
record_batch.h	9398	0644	edit dl rm
result.h	17845	0644	edit dl rm
scalar.h	21124	0644	edit dl rm
sparse_tensor.h	25205	0644	edit dl rm
status.h	15552	0644	edit dl rm
stl.h	18297	0644	edit dl rm
stl_allocator.h	4614	0644	edit dl rm
stl_iterator.h	4583	0644	edit dl rm
table.h	11313	0644	edit dl rm
table_builder.h	3924	0644	edit dl rm
tensor.h	8913	0644	edit dl rm
type.h	72157	0644	edit dl rm
type_fwd.h	18243	0644	edit dl rm
type_traits.h	32600	0644	edit dl rm
visitor.h	6966	0644	edit dl rm
visitor_inline.h	16429	0644	edit dl rm

Edit: /usr/local/lib64/python3.6/site-packages/pyarrow/include/arrow/extension_type.h (6284B)

// 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.

/// User-defined extension types.
/// \since 0.13.0

#pragma once

#include <memory>
#include <string>

#include "arrow/array/array_base.h"
#include "arrow/array/data.h"
#include "arrow/result.h"
#include "arrow/status.h"
#include "arrow/type.h"
#include "arrow/type_fwd.h"
#include "arrow/util/checked_cast.h"
#include "arrow/util/macros.h"
#include "arrow/util/visibility.h"

namespace arrow {

/// \brief The base class for custom / user-defined types.
class ARROW_EXPORT ExtensionType : public DataType {
 public:
  static constexpr Type::type type_id = Type::EXTENSION;

static constexpr const char* type_name() { return "extension"; }

/// \brief The type of array used to represent this extension type's data
  const std::shared_ptr<DataType>& storage_type() const { return storage_type_; }

DataTypeLayout layout() const override;

std::string ToString() const override;

std::string name() const override { return "extension"; }

/// \brief Unique name of extension type used to identify type for
  /// serialization
  /// \return the string name of the extension
  virtual std::string extension_name() const = 0;

/// \brief Determine if two instances of the same extension types are
  /// equal. Invoked from ExtensionType::Equals
  /// \param[in] other the type to compare this type with
  /// \return bool true if type instances are equal
  virtual bool ExtensionEquals(const ExtensionType& other) const = 0;

/// \brief Wrap built-in Array type in a user-defined ExtensionArray instance
  /// \param[in] data the physical storage for the extension type
  virtual std::shared_ptr<Array> MakeArray(std::shared_ptr<ArrayData> data) const = 0;

/// \brief Create an instance of the ExtensionType given the actual storage
  /// type and the serialized representation
  /// \param[in] storage_type the physical storage type of the extension
  /// \param[in] serialized_data the serialized representation produced by
  /// Serialize
  virtual Result<std::shared_ptr<DataType>> Deserialize(
      std::shared_ptr<DataType> storage_type,
      const std::string& serialized_data) const = 0;

/// \brief Create a serialized representation of the extension type's
  /// metadata. The storage type will be handled automatically in IPC code
  /// paths
  /// \return the serialized representation
  virtual std::string Serialize() const = 0;

/// \brief Wrap the given storage array as an extension array
  static std::shared_ptr<Array> WrapArray(const std::shared_ptr<DataType>& ext_type,
                                          const std::shared_ptr<Array>& storage);

/// \brief Wrap the given chunked storage array as a chunked extension array
  static std::shared_ptr<ChunkedArray> WrapArray(
      const std::shared_ptr<DataType>& ext_type,
      const std::shared_ptr<ChunkedArray>& storage);

protected:
  explicit ExtensionType(std::shared_ptr<DataType> storage_type)
      : DataType(Type::EXTENSION), storage_type_(storage_type) {}

std::shared_ptr<DataType> storage_type_;
};

/// \brief Base array class for user-defined extension types
class ARROW_EXPORT ExtensionArray : public Array {
 public:
  /// \brief Construct an ExtensionArray from an ArrayData.
  ///
  /// The ArrayData must have the right ExtensionType.
  explicit ExtensionArray(const std::shared_ptr<ArrayData>& data);

/// \brief Construct an ExtensionArray from a type and the underlying storage.
  ExtensionArray(const std::shared_ptr<DataType>& type,
                 const std::shared_ptr<Array>& storage);

const ExtensionType* extension_type() const {
    return internal::checked_cast<const ExtensionType*>(data_->type.get());
  }

/// \brief The physical storage for the extension array
  const std::shared_ptr<Array>& storage() const { return storage_; }

protected:
  void SetData(const std::shared_ptr<ArrayData>& data);
  std::shared_ptr<Array> storage_;
};

class ARROW_EXPORT ExtensionTypeRegistry {
 public:
  /// \brief Provide access to the global registry to allow code to control for
  /// race conditions in registry teardown when some types need to be
  /// unregistered and destroyed first
  static std::shared_ptr<ExtensionTypeRegistry> GetGlobalRegistry();

virtual ~ExtensionTypeRegistry() = default;

virtual Status RegisterType(std::shared_ptr<ExtensionType> type) = 0;
  virtual Status UnregisterType(const std::string& type_name) = 0;
  virtual std::shared_ptr<ExtensionType> GetType(const std::string& type_name) = 0;
};

/// \brief Register an extension type globally. The name returned by the type's
/// extension_name() method should be unique. This method is thread-safe
/// \param[in] type an instance of the extension type
/// \return Status
ARROW_EXPORT
Status RegisterExtensionType(std::shared_ptr<ExtensionType> type);

/// \brief Delete an extension type from the global registry. This method is
/// thread-safe
/// \param[in] type_name the unique name of a registered extension type
/// \return Status error if the type name is unknown
ARROW_EXPORT
Status UnregisterExtensionType(const std::string& type_name);

/// \brief Retrieve an extension type from the global registry. Returns nullptr
/// if not found. This method is thread-safe
/// \return the globally-registered extension type
ARROW_EXPORT
std::shared_ptr<ExtensionType> GetExtensionType(const std::string& type_name);

ARROW_EXPORT extern const char kExtensionTypeKeyName[];
ARROW_EXPORT extern const char kExtensionMetadataKeyName[];

}  // namespace arrow

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