fn list()

in crates/iceberg/src/arrow/value.rs [103:167]
63 lines of code
8 McCabe index (conditional complexity)

    fn list(
        &mut self,
        list: &ListType,
        array: &ArrayRef,
        elements: Vec<Option<Literal>>,
    ) -> Result<Vec<Option<Literal>>> {
        if list.element_field.required && elements.iter().any(Option::is_none) {
            return Err(Error::new(
                ErrorKind::DataInvalid,
                "The list should not have null value",
            ));
        }
        match array.data_type() {
            DataType::List(_) => {
                let offset = array
                    .as_any()
                    .downcast_ref::<ListArray>()
                    .ok_or_else(|| {
                        Error::new(ErrorKind::DataInvalid, "The partner is not a list array")
                    })?
                    .offsets();
                // combine the result according to the offset
                let mut result = Vec::with_capacity(offset.len() - 1);
                for i in 0..offset.len() - 1 {
                    let start = offset[i] as usize;
                    let end = offset[i + 1] as usize;
                    result.push(Some(Literal::List(elements[start..end].to_vec())));
                }
                Ok(result)
            }
            DataType::LargeList(_) => {
                let offset = array
                    .as_any()
                    .downcast_ref::<LargeListArray>()
                    .ok_or_else(|| {
                        Error::new(
                            ErrorKind::DataInvalid,
                            "The partner is not a large list array",
                        )
                    })?
                    .offsets();
                // combine the result according to the offset
                let mut result = Vec::with_capacity(offset.len() - 1);
                for i in 0..offset.len() - 1 {
                    let start = offset[i] as usize;
                    let end = offset[i + 1] as usize;
                    result.push(Some(Literal::List(elements[start..end].to_vec())));
                }
                Ok(result)
            }
            DataType::FixedSizeList(_, len) => {
                let mut result = Vec::with_capacity(elements.len() / *len as usize);
                for i in 0..elements.len() / *len as usize {
                    let start = i * *len as usize;
                    let end = (i + 1) * *len as usize;
                    result.push(Some(Literal::List(elements[start..end].to_vec())));
                }
                Ok(result)
            }
            _ => Err(Error::new(
                ErrorKind::DataInvalid,
                "The partner is not a list type",
            )),
        }
    }