mirror of
https://github.com/aykhans/AzSuicideDataVisualization.git
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114 lines
3.8 KiB
C++
114 lines
3.8 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#pragma once
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#include <memory>
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#include <string>
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#include <vector>
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#include "arrow/filesystem/filesystem.h"
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namespace arrow {
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namespace internal {
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class Uri;
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}
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namespace fs {
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/// Options for the LocalFileSystem implementation.
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struct ARROW_EXPORT LocalFileSystemOptions {
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/// Whether OpenInputStream and OpenInputFile return a mmap'ed file,
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/// or a regular one.
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bool use_mmap = false;
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/// \brief Initialize with defaults
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static LocalFileSystemOptions Defaults();
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bool Equals(const LocalFileSystemOptions& other) const;
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static Result<LocalFileSystemOptions> FromUri(const ::arrow::internal::Uri& uri,
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std::string* out_path);
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};
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/// \brief A FileSystem implementation accessing files on the local machine.
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///
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/// This class handles only `/`-separated paths. If desired, conversion
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/// from Windows backslash-separated paths should be done by the caller.
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/// Details such as symlinks are abstracted away (symlinks are always
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/// followed, except when deleting an entry).
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class ARROW_EXPORT LocalFileSystem : public FileSystem {
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public:
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explicit LocalFileSystem(const io::IOContext& = io::default_io_context());
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explicit LocalFileSystem(const LocalFileSystemOptions&,
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const io::IOContext& = io::default_io_context());
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~LocalFileSystem() override;
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std::string type_name() const override { return "local"; }
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Result<std::string> NormalizePath(std::string path) override;
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bool Equals(const FileSystem& other) const override;
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LocalFileSystemOptions options() const { return options_; }
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/// \cond FALSE
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using FileSystem::GetFileInfo;
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/// \endcond
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Result<FileInfo> GetFileInfo(const std::string& path) override;
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Result<std::vector<FileInfo>> GetFileInfo(const FileSelector& select) override;
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Status CreateDir(const std::string& path, bool recursive = true) override;
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Status DeleteDir(const std::string& path) override;
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Status DeleteDirContents(const std::string& path, bool missing_dir_ok = false) override;
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Status DeleteRootDirContents() override;
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Status DeleteFile(const std::string& path) override;
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Status Move(const std::string& src, const std::string& dest) override;
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Status CopyFile(const std::string& src, const std::string& dest) override;
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Result<std::shared_ptr<io::InputStream>> OpenInputStream(
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const std::string& path) override;
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Result<std::shared_ptr<io::RandomAccessFile>> OpenInputFile(
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const std::string& path) override;
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Result<std::shared_ptr<io::OutputStream>> OpenOutputStream(
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const std::string& path,
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const std::shared_ptr<const KeyValueMetadata>& metadata = {}) override;
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Result<std::shared_ptr<io::OutputStream>> OpenAppendStream(
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const std::string& path,
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const std::shared_ptr<const KeyValueMetadata>& metadata = {}) override;
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protected:
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LocalFileSystemOptions options_;
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};
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namespace internal {
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// Return whether the string is detected as a local absolute path.
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ARROW_EXPORT
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bool DetectAbsolutePath(const std::string& s);
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} // namespace internal
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} // namespace fs
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} // namespace arrow
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