feat: ESPI 4.0 Schema Compliance - Phase 6: MeterReading

[dfcoffin]

Summary

Phase 6 of the ESPI 4.0 schema compliance project updates MeterReading entity, DTO, mapper, repository, and tests. Per ESPI 4.0 specification, MeterReading has NO child elements - relationships to ReadingType and IntervalBlock are expressed via Atom links only.

Changes Made

MeterReadingDto

• ✅ Already ESPI 4.0 compliant - has NO child elements per espi.xsd
• ✅ Updated documentation to clarify spec compliance
• ✅ Removed unused imports: OffsetDateTime, List<>, LinkDto
• ✅ Added ESPI 4.0 specification reference

MeterReadingMapper

• ✅ Simplified mapper - removed unnecessary dependencies:
  • Removed BaseMapperUtils (not needed)
  • Removed IntervalBlockMapper (relationships via Atom links)
  • Removed ReadingTypeMapper (relationships via Atom links)
• ✅ Removed updateEntity method (read-only operations only)
• ✅ Updated toEntity with explicit mappings for all audit/relationship fields

MeterReadingRepository

• ✅ Optimized to keep only indexed queries:
  • findAllIds() - returns all meter reading IDs
  • findAllIdsByUsagePointId() - indexed on usage_point_id
• ✅ Removed non-indexed queries:
  • deleteById() override - redundant with inherited method
  • findByRelatedHref() - non-indexed query on relatedLinks
  • findAllRelated() - complex query without indexes
  • findAllIdsByXpath2() - complex join without index
  • findIdByXpath() - complex join without index

MeterReadingRepositoryTest

• ✅ Removed tests for deleted repository methods:
  • shouldFindMeterReadingsByRelatedHref
  • shouldFindAllRelatedEntities
  • shouldFindAllMeterReadingIdsByXpath2
  • shouldFindMeterReadingIdByXpath
• ✅ Updated shouldHandleEmptyResultsGracefully test
• ✅ All 23 MeterReading tests passing

ESPI 4.0 Specification Note

Per the espi.xsd schema, MeterReading is defined as:

<xs:complexType name="MeterReading">
  <xs:annotation>
    <xs:documentation>Set of values obtained from the meter.</xs:documentation>
  </xs:annotation>
  <xs:complexContent>
    <xs:extension base="IdentifiedObject"/>
  </xs:complexContent>
</xs:complexType>

Note that MeterReading extends IdentifiedObject with NO additional child elements. Relationships to IntervalBlock and ReadingType are expressed via Atom <link> elements in the entry, not as embedded XML elements.

Validation

• ✅ All 541 openespi-common tests passing
• ✅ MeterReadingRepositoryTest: 23/23 tests passing
• ✅ Flyway migration scripts verified (MySQL, PostgreSQL, H2)

Related Issues

• Part of Review Current Usage and Customer Entity Classes to ensure they match their ESPI Schema XSD files #28 (ESPI 4.0 Schema Compliance - Multi-Phase Plan)

Testing Instructions

# Run MeterReading tests
mvn test -Dtest=MeterReadingRepositoryTest

# Run all tests
mvn clean test

🤖 Generated with Claude Code