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(array: &ArrayData) -> Extend<'_> {
23    let offset = array.offset();
24    Box::new(
25        move |mutable: &mut _MutableArrayData, index: usize, start: usize, len: usize| {
26            let start = start.checked_add(offset).ok_or_else(|| {
27                ArrowError::InvalidArgumentError(format!(
28                    "struct offset {offset} with start {start} overflows usize"
29                ))
30            })?;
31            let end = start.checked_add(len).ok_or_else(|| {
32                ArrowError::InvalidArgumentError(format!(
33                    "struct start {start} with length {len} overflows usize"
34                ))
35            })?;
36            for (col_idx, child) in mutable.child_data.iter_mut().enumerate() {
37                child
38                    .try_extend(index, start, end)
39                    .map_err(|e| wrap_column_error(e, col_idx, &mutable.data_type))?
40            }
41            Ok(())
42        },
43    )
44}
45
46pub(super) fn extend_nulls(mutable: &mut _MutableArrayData, len: usize) -> Result<(), ArrowError> {
47    for (col_idx, child) in mutable.child_data.iter_mut().enumerate() {
48        child
49            .try_extend_nulls(len)
50            .map_err(|e| wrap_column_error(e, col_idx, &mutable.data_type))?;
51    }
52    Ok(())
53}
54
55fn wrap_column_error(e: ArrowError, col_idx: usize, data_type: &DataType) -> ArrowError {
56    let name_ctx = if let DataType::Struct(fields) = data_type {
57        fields
58            .get(col_idx)
59            .map(|f| format!(" (\"{}\")", f.name()))
60            .unwrap_or_default()
61    } else {
62        String::new()
63    };
64    ArrowError::InvalidArgumentError(format!("struct column {col_idx}{name_ctx} failed: {e}"))
65}
arrow_data/transform/structure.rs

arrow_data/transform/
structure.rs
