datafusion-common 48.0.1

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// 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
//
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// under the License.

//! File type abstraction

use std::any::Any;
use std::fmt::Display;

/// The default file extension of arrow files
pub const DEFAULT_ARROW_EXTENSION: &str = ".arrow";
/// The default file extension of avro files
pub const DEFAULT_AVRO_EXTENSION: &str = ".avro";
/// The default file extension of csv files
pub const DEFAULT_CSV_EXTENSION: &str = ".csv";
/// The default file extension of json files
pub const DEFAULT_JSON_EXTENSION: &str = ".json";
/// The default file extension of parquet files
pub const DEFAULT_PARQUET_EXTENSION: &str = ".parquet";

/// Define each `FileType`/`FileCompressionType`'s extension
pub trait GetExt {
    /// File extension getter
    fn get_ext(&self) -> String;
}

/// Defines the functionality needed for logical planning for
/// a type of file which will be read or written to storage.
pub trait FileType: GetExt + Display + Send + Sync {
    /// Returns the table source as [`Any`] so that it can be
    /// downcast to a specific implementation.
    fn as_any(&self) -> &dyn Any;
}