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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 std::fmt::{self, Display, Formatter};
use datafusion::logical_expr::expr::LambdaVariable;
use pyo3::prelude::*;
#[pyclass(
from_py_object,
frozen,
name = "LambdaVariable",
module = "datafusion.expr",
subclass
)]
#[derive(Clone)]
pub struct PyLambdaVariable {
variable: LambdaVariable,
}
impl From<LambdaVariable> for PyLambdaVariable {
fn from(variable: LambdaVariable) -> PyLambdaVariable {
PyLambdaVariable { variable }
}
}
impl From<PyLambdaVariable> for LambdaVariable {
fn from(variable: PyLambdaVariable) -> Self {
variable.variable
}
}
impl Display for PyLambdaVariable {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(f, "LambdaVariable({})", &self.variable.name)
}
}
#[pymethods]
impl PyLambdaVariable {
/// Reference name of the lambda parameter.
fn name(&self) -> String {
self.variable.name.clone()
}
fn __repr__(&self) -> PyResult<String> {
Ok(format!("LambdaVariable({self})"))
}
fn __name__(&self) -> PyResult<String> {
Ok("LambdaVariable".to_string())
}
}