alamb commented on code in PR #4064:
URL: https://github.com/apache/arrow-rs/pull/4064#discussion_r1167833025
##########
arrow-array/src/array/struct_array.rs:
##########
@@ -77,10 +77,136 @@ pub struct StructArray {
len: usize,
data_type: DataType,
nulls: Option<NullBuffer>,
- pub(crate) fields: Vec<ArrayRef>,
+ fields: Vec<ArrayRef>,
}
impl StructArray {
+ /// Create a new [`StructArray`] from the provided parts, panicking on
failure
+ ///
+ /// # Panics
+ ///
+ /// Panics if [`Self::try_new`] returns an error
+ pub fn new(fields: Fields, arrays: Vec<ArrayRef>, nulls:
Option<NullBuffer>) -> Self {
+ Self::try_new(fields, arrays, nulls).unwrap()
+ }
+
+ /// Create a new [`StructArray`] from the provided parts, returning an
error on failure
+ ///
+ /// # Errors
+ ///
+ /// Errors if
+ ///
+ /// * `fields.len() != arrays.len()`
+ /// * `fields[i].data_type() != arrays[i].data_type()`
+ /// * `arrays[i].len() != arrays[j].len()`
+ /// * `arrays[i].len() != nulls.len()`
+ /// * `!fields[i].is_nullable() && !nulls.contains(arrays[i].nulls())`
+ pub fn try_new(
Review Comment:
As in the similar PRs, I think we should add test coverage for these new
constructors, especially the error conditions
##########
arrow-array/src/array/struct_array.rs:
##########
@@ -359,37 +485,10 @@ impl std::fmt::Debug for StructArray {
impl From<(Vec<(Field, ArrayRef)>, Buffer)> for StructArray {
fn from(pair: (Vec<(Field, ArrayRef)>, Buffer)) -> Self {
- let capacity = pair.0.len();
Review Comment:
it is really nice that you are making the construction (and validation) of
the various array types consistent ❤️
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