Add support for serializing big-endian arrays to Parquet.

astropy/io/misc/parquet.py

@@ -450,7 +450,20 @@ def write_table_parquet(table, output, overwrite=False):
                     val = []
             else:
                 val = encode_table[name]
-            arrays.append(pa.array(val, type=schema.field(name).type))
+            try:
+                arrays.append(pa.array(val, type=schema.field(name).type))
+            except pa.ArrowNotImplementedError as err:
+                # check if val is big-endian.
+                if (np.little_endian and val.dtype.byteorder == ">") or (
+                    not np.little_endian and val.dtype.byteorder == "="
+                ):
+                    # We need to convert the array to little-endian.
+                    val2 = val.byteswap()
+                    val2.dtype = val2.dtype.newbyteorder("<")
+                    arrays.append(pa.array(val2, type=schema.field(name).type))
+                else:
+                    # This failed for some other reason, so raise.
+                    raise err
 
         # Create a pyarrow table from the list of arrays and the schema
         pa_table = pa.Table.from_arrays(arrays, schema=schema)