datafusion_python/expr/
case.rs

1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements.  See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership.  The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License.  You may obtain a copy of the License at
8//
9//   http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied.  See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18use datafusion::logical_expr::Case;
19use pyo3::prelude::*;
20
21use crate::expr::PyExpr;
22
23#[pyclass(
24    from_py_object,
25    frozen,
26    name = "Case",
27    module = "datafusion.expr",
28    subclass
29)]
30#[derive(Clone)]
31pub struct PyCase {
32    case: Case,
33}
34
35impl From<PyCase> for Case {
36    fn from(case: PyCase) -> Self {
37        case.case
38    }
39}
40
41impl From<Case> for PyCase {
42    fn from(case: Case) -> PyCase {
43        PyCase { case }
44    }
45}
46
47#[pymethods]
48impl PyCase {
49    fn expr(&self) -> Option<PyExpr> {
50        self.case.expr.as_ref().map(|e| (**e).clone().into())
51    }
52
53    fn when_then_expr(&self) -> Vec<(PyExpr, PyExpr)> {
54        self.case
55            .when_then_expr
56            .iter()
57            .map(|e| ((*e.0).clone().into(), (*e.1).clone().into()))
58            .collect()
59    }
60
61    fn else_expr(&self) -> Option<PyExpr> {
62        self.case.else_expr.as_ref().map(|e| (**e).clone().into())
63    }
64}
datafusion_python/expr/case.rs

datafusion_python/expr/
case.rs
