Support parsing/encoding WKT and WKB from binary/text view arrays

[kylebarron]

No description provided.

[JosiahParry]

I think this is an error I am encountering.

I can get a SerializedArrayDyn but trying to cast it to GeometryArray using let res = GeometryArray::try_from(serialized_array.into_array_ref().as_ref())?; results in a panic src/vendor/geoarrow/src/array/dynamic.rs:199:9: not yet implemented

[kylebarron]

This issue is for something else. Arrow supports multiple types to store binary and string data. In particular, it has both the "traditional" binary/string array and the new "view types" binary/string arrays. See https://datafusion.apache.org/blog/2024/09/13/string-view-german-style-strings-part-1/, https://pola.rs/posts/polars-string-type/.

We currently support parsing WKT and WKB from the "traditional" types but not the new "view" types.

[kylebarron]

results in a panic src/vendor/geoarrow/src/array/dynamic.rs:199:9: not yet implemented

I accidentally pushed it directly but I fixed that todo!() in b4ecffa.

But still, that only fixes the into_array_ref panic. GeometryArray::try_from won't work from a serialized array. It only supports zero-copy conversions, and parsing from WKT or WKB isn't a zero-copy conversion. You need to use the WKT and WKB apis to parse it.

[kylebarron]

apache/arrow-rs#6924 and the existing StringArrayType may help in making this generic. (And then we could also implement StringArrayType for our WKTArray and BinaryArrayType for our WKBArray).