arrow_json/reader/
null_array.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 std::sync::Arc;
19
20use arrow_array::{ArrayRef, NullArray};
21use arrow_schema::ArrowError;
22
23use crate::reader::tape::{Tape, TapeElement};
24use crate::reader::{ArrayDecoder, DecoderContext};
25
26#[derive(Default)]
27pub struct NullArrayDecoder {
28    ignore_type_conflicts: bool,
29}
30impl NullArrayDecoder {
31    pub fn new(ctx: &DecoderContext) -> Self {
32        Self {
33            ignore_type_conflicts: ctx.ignore_type_conflicts(),
34        }
35    }
36}
37
38impl ArrayDecoder for NullArrayDecoder {
39    fn decode(&mut self, tape: &Tape<'_>, pos: &[u32]) -> Result<ArrayRef, ArrowError> {
40        if !self.ignore_type_conflicts {
41            for p in pos {
42                if !matches!(tape.get(*p), TapeElement::Null) {
43                    return Err(tape.error(*p, "null"));
44                }
45            }
46        }
47        Ok(Arc::new(NullArray::new(pos.len())))
48    }
49}
arrow_json/reader/null_array.rs

arrow_json/reader/
null_array.rs
