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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.
//! Arrow logical types
mod datatype;
pub use datatype::*;
mod error;
pub use error::*;
mod field;
pub use field::*;
mod fields;
pub use fields::*;
mod schema;
pub use schema::*;
use std::ops;
#[cfg(feature = "ffi")]
pub mod ffi;
/// Options that define the sort order of a given column
#[derive(Clone, Hash, Copy, Debug, Eq, PartialEq, Ord, PartialOrd)]
pub struct SortOptions {
/// Whether to sort in descending order
pub descending: bool,
/// Whether to sort nulls first
pub nulls_first: bool,
}
impl Default for SortOptions {
fn default() -> Self {
Self {
descending: false,
// default to nulls first to match spark's behavior
nulls_first: true,
}
}
}
/// `!` operator is overloaded for `SortOptions` to invert boolean
/// fields of the struct.
impl ops::Not for SortOptions {
type Output = SortOptions;
fn not(self) -> SortOptions {
SortOptions {
descending: !self.descending,
nulls_first: !self.nulls_first,
}
}
}
#[test]
fn test_overloaded_not_sort_options() {
let sort_options_array = [
SortOptions {
descending: false,
nulls_first: false,
},
SortOptions {
descending: false,
nulls_first: true,
},
SortOptions {
descending: true,
nulls_first: false,
},
SortOptions {
descending: true,
nulls_first: true,
},
];
assert!((!sort_options_array[0]).descending);
assert!((!sort_options_array[0]).nulls_first);
assert!((!sort_options_array[1]).descending);
assert!(!(!sort_options_array[1]).nulls_first);
assert!(!(!sort_options_array[2]).descending);
assert!((!sort_options_array[2]).nulls_first);
assert!(!(!sort_options_array[3]).descending);
assert!(!(!sort_options_array[3]).nulls_first);
}