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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.
use datafusion::logical_expr::Case;
use pyo3::prelude::*;
use crate::expr::PyExpr;
#[pyclass(
from_py_object,
frozen,
name = "Case",
module = "datafusion.expr",
subclass
)]
#[derive(Clone)]
pub struct PyCase {
case: Case,
}
impl From<PyCase> for Case {
fn from(case: PyCase) -> Self {
case.case
}
}
impl From<Case> for PyCase {
fn from(case: Case) -> PyCase {
PyCase { case }
}
}
#[pymethods]
impl PyCase {
fn expr(&self) -> Option<PyExpr> {
self.case.expr.as_ref().map(|e| (**e).clone().into())
}
fn when_then_expr(&self) -> Vec<(PyExpr, PyExpr)> {
self.case
.when_then_expr
.iter()
.map(|e| ((*e.0).clone().into(), (*e.1).clone().into()))
.collect()
}
fn else_expr(&self) -> Option<PyExpr> {
self.case.else_expr.as_ref().map(|e| (**e).clone().into())
}
}