PLAN-010 Phase 9: Create Geometry API Builder Protocol (Stubs)

[discreteds]

Phase 9: Create Geometry Protocol (Stubs)

Priority: P2 (Medium)
Effort: Small
Methods: +18
New Files: 1
Depends on: PLAN-009 Phase 8 (#60)

Description

Create API builder protocol stubs for geometry operations. All implementations will raise NotImplementedError.

File to Create

src/mountainash_expressions/core/expression_protocols/api_builders/substrait/prtcl_api_bldr_scalar_geometry.py

Methods to Add (18 stubs)

All geometry operations from Substrait specification including:

• Point operations
• Line operations
• Polygon operations
• Distance/relationship functions

Implementation Notes

All 18 geometry methods will be protocol stubs. Corresponding backend implementations raise NotImplementedError("Geometry operations require specialized libraries").

Acceptance Criteria

• Protocol file created
• All 18 method stubs defined
• Consistent with expression system geometry protocol
• Update substrait/__init__.py with new import

Reference

• ADR-010: API Builder Protocol Alignment
• Substrait geometry extension