arrow-json/src/reader/boolean_array.rs

// Licensed to the Apache Software Foundation (ASF) under one
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// 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,
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use arrow_array::builder::BooleanBuilder;
use arrow_array::Array;
use arrow_data::ArrayData;
use arrow_schema::ArrowError;

use crate::reader::tape::{Tape, TapeElement};
use crate::reader::ArrayDecoder;

#[derive(Default)]
pub struct BooleanArrayDecoder {}

impl ArrayDecoder for BooleanArrayDecoder {
    fn decode(&mut self, tape: &Tape<'_>, pos: &[u32]) -> Result<ArrayData, ArrowError> {
        let mut builder = BooleanBuilder::with_capacity(pos.len());
        for p in pos {
            match tape.get(*p) {
                TapeElement::Null => builder.append_null(),
                TapeElement::True => builder.append_value(true),
                TapeElement::False => builder.append_value(false),
                _ => return Err(tape.error(*p, "boolean")),
            }
        }

        Ok(builder.finish().into_data())
    }
}