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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 arrow::datatypes::Field;
use arrow::pyarrow::PyArrowType;
use datafusion::logical_expr::expr::Placeholder;
use pyo3::prelude::*;
use crate::common::data_type::PyDataType;
#[pyclass(
from_py_object,
frozen,
name = "Placeholder",
module = "datafusion.expr",
subclass
)]
#[derive(Clone)]
pub struct PyPlaceholder {
placeholder: Placeholder,
}
impl From<Placeholder> for PyPlaceholder {
fn from(placeholder: Placeholder) -> Self {
PyPlaceholder { placeholder }
}
}
#[pymethods]
impl PyPlaceholder {
fn id(&self) -> String {
self.placeholder.id.clone()
}
fn data_type(&self) -> Option<PyDataType> {
self.placeholder
.field
.as_ref()
.map(|f| f.data_type().clone().into())
}
fn field(&self) -> Option<PyArrowType<Field>> {
self.placeholder
.field
.as_ref()
.map(|f| f.as_ref().clone().into())
}
}