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 crate::expr::PyExpr;
19use datafusion::logical_expr::Case;
20use pyo3::prelude::*;
21
22#[pyclass(name = "Case", module = "datafusion.expr", subclass)]
23#[derive(Clone)]
24pub struct PyCase {
25    case: Case,
26}
27
28impl From<PyCase> for Case {
29    fn from(case: PyCase) -> Self {
30        case.case
31    }
32}
33
34impl From<Case> for PyCase {
35    fn from(case: Case) -> PyCase {
36        PyCase { case }
37    }
38}
39
40#[pymethods]
41impl PyCase {
42    fn expr(&self) -> Option<PyExpr> {
43        self.case.expr.as_ref().map(|e| (**e).clone().into())
44    }
45
46    fn when_then_expr(&self) -> Vec<(PyExpr, PyExpr)> {
47        self.case
48            .when_then_expr
49            .iter()
50            .map(|e| ((*e.0).clone().into(), (*e.1).clone().into()))
51            .collect()
52    }
53
54    fn else_expr(&self) -> Option<PyExpr> {
55        self.case.else_expr.as_ref().map(|e| (**e).clone().into())
56    }
57}
datafusion_python/expr/case.rs

datafusion_python/expr/
case.rs
