Method decode

arrow-json/src/reader/timestamp_array.rs:56–114

(&mut self, tape: &Tape<'_>, pos: &[u32])

    Tz: TimeZone + Send,
{
    fn decode(&mut self, tape: &Tape<'_>, pos: &[u32]) -> Result<ArrayRef, ArrowError> {
        let mut builder =
            PrimitiveBuilder::<P>::with_capacity(pos.len()).with_data_type(self.data_type.clone());
        for p in pos {
            let value = match tape.get(*p) {
                TapeElement::Null => {
                    builder.append_null();
                    continue;
                }
                TapeElement::String(idx) => {
                    let s = tape.get_string(idx);
                    let date = string_to_datetime(&self.timezone, s).map_err(|e| {
                        ArrowError::JsonError(format!(
                            "failed to parse \"{s}\" as {}: {}",
                            self.data_type, e
                        ))
                    });

                    date.and_then(|date| match P::UNIT {
                        TimeUnit::Second => Ok(date.timestamp()),
                        TimeUnit::Millisecond => Ok(date.timestamp_millis()),
                        TimeUnit::Microsecond => Ok(date.timestamp_micros()),
                        TimeUnit::Nanosecond => date.timestamp_nanos_opt().ok_or_else(|| {
                            ArrowError::ParseError(format!(
                                "{} would overflow 64-bit signed nanoseconds",
                                date.to_rfc3339(),
                            ))
                        }),
                    })
                }
                TapeElement::Number(idx) => {
                    let s = tape.get_string(idx);
                    let b = s.as_bytes();
                    lexical_core::parse::<i64>(b)
                        .or_else(|_| lexical_core::parse::<f64>(b).map(|x| x as i64))
                        .map_err(|_| {
                            ArrowError::JsonError(format!(
                                "failed to parse {s} as {}",
                                self.data_type
                            ))
                        })
                }
                TapeElement::I32(v) => Ok(v as i64),
                TapeElement::I64(high) => match tape.get(p + 1) {
                    TapeElement::I32(low) => Ok(((high as i64) << 32) | (low as u32) as i64),
                    _ => unreachable!(),
                },
                _ => Err(tape.error(*p, "primitive")),
            };

            match value {
                Ok(value) => builder.append_value(value),
                Err(_) if self.ignore_type_conflicts => builder.append_null(),
                Err(e) => return Err(e),
            }
        }

        Ok(Arc::new(builder.finish()))