arrow_data/transform/
structure.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 super::{_MutableArrayData, Extend};
19use crate::ArrayData;
20use arrow_schema::{ArrowError, DataType};
21
22pub(super) fn build_extend(_: &ArrayData) -> Extend<'_> {
23    Box::new(
24        move |mutable: &mut _MutableArrayData, index: usize, start: usize, len: usize| {
25            for (col_idx, child) in mutable.child_data.iter_mut().enumerate() {
26                child
27                    .try_extend(index, start, start + len)
28                    .map_err(|e| wrap_column_error(e, col_idx, &mutable.data_type))?
29            }
30            Ok(())
31        },
32    )
33}
34
35pub(super) fn extend_nulls(mutable: &mut _MutableArrayData, len: usize) -> Result<(), ArrowError> {
36    for (col_idx, child) in mutable.child_data.iter_mut().enumerate() {
37        child
38            .try_extend_nulls(len)
39            .map_err(|e| wrap_column_error(e, col_idx, &mutable.data_type))?;
40    }
41    Ok(())
42}
43
44fn wrap_column_error(e: ArrowError, col_idx: usize, data_type: &DataType) -> ArrowError {
45    let name_ctx = if let DataType::Struct(fields) = data_type {
46        fields
47            .get(col_idx)
48            .map(|f| format!(" (\"{}\")", f.name()))
49            .unwrap_or_default()
50    } else {
51        String::new()
52    };
53    ArrowError::InvalidArgumentError(format!("struct column {col_idx}{name_ctx} failed: {e}"))
54}
arrow_data/transform/structure.rs

arrow_data/transform/
structure.rs
