Enum columns sort by ordinal (natural) order, not alphabetically as documented #13

Summary

SPECIFICATIONS.md §2.2 (Type-to-Renderer Mapping) lists the Sorting for Enum<?> columns as "Alphabetical", but the implementation sorts enum columns by the enum's natural order (Enum.compareTo, i.e. declaration / ordinal() order). The two only coincide when the constants happen to be declared in alphabetical order.

Details

For sortable columns, EasyGrid installs an in-memory comparator built from the column's ValueProvider whenever the value type is Comparable or a primitive (EasyGridWrapper#createEasyColumn):

if (Comparable.class.isAssignableFrom(type) || type.isPrimitive()) {
  column.setComparator((ValueProvider) getter);
}

Enum implements Comparable, so enum columns receive a natural-order comparator and therefore sort by ordinal() — not alphabetically.

(Enum rendering is correct per spec: it uses Enum.toString(), not Enum.name().)

Expected vs. actual

• Expected (spec §2.2): enum columns sort alphabetically.
• Actual: enum columns sort in declaration / ordinal order.

Options

1. Update the spec to state that enums sort in natural (declaration) order. Least work, and often the more useful behaviour (e.g. LOW < MEDIUM < HIGH).
2. Install a toString()-based comparator for enum-typed columns so the runtime behaviour matches the documented "Alphabetical".

References

• SPECIFICATIONS.md §2.2 — Enum<?> row, Sorting = Alphabetical
• EasyGridWrapper#createEasyColumn — comparator wiring
• Tracked as finding chore: bootstrap Easy Grid Add-on from AddonStarter24 #2 in IMPLEMENTATION_ANALYSIS.md