Function value_to_string

arrow-cast/src/cast/string.rs:21–39

(
    array: &dyn Array,
    options: &CastOptions,
)

use arrow_buffer::NullBuffer;

pub(crate) fn value_to_string<O: OffsetSizeTrait>(
    array: &dyn Array,
    options: &CastOptions,
) -> Result<ArrayRef, ArrowError> {
    let mut builder = GenericStringBuilder::<O>::new();
    let formatter = ArrayFormatter::try_new(array, &options.format_options)?;
    let nulls = array.nulls();
    for i in 0..array.len() {
        match nulls.map(|x| x.is_null(i)).unwrap_or_default() {
            true => builder.append_null(),
            false => {
                formatter.value(i).write(&mut builder)?;
                // tell the builder the row is finished
                builder.append_value("");
            }
        }
    }
    Ok(Arc::new(builder.finish()))
}

pub(crate) fn value_to_string_view(
    array: &dyn Array,