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refactor: ESPI 4.0 Schema Compliance - Phase 0: Fix Object-based entities (#66)
* refactor: remove 11 incorrect related_links tables (Issue #28 Phase A) This commit completes Phase A of ESPI 4.0 schema compliance by removing 11 database tables for related_links that were incorrectly created for entities that either extend Object (not IdentifiedObject) or use direct foreign key relationships instead of Atom links. Changes: - V1 migration: Removed 4 related_links tables - retail_customer_related_links (direct FK pattern) - service_delivery_point_related_links (extends Object) - subscription_related_links (direct FK for OAuth2) - batch_list_related_links (wrapper type, not IdentifiedObject) - V3 migration: Removed 7 related_links tables - interval_reading_related_links (extends Object, espi.xsd:1016) - reading_quality_related_links (extends Object, espi.xsd:1062) - pnode_ref_related_links (extends Object, espi.xsd:1539) - aggregated_node_ref_related_links (extends Object, espi.xsd:1570) - line_item_related_links (extends Object, espi.xsd:1444) - phone_number_related_links (custom, not in XSD) - statement_ref_related_links (extends Object, customer.xsd:285) - Vendor V2 files: Updated documentation comments to reflect that interval_reading and reading_quality do NOT have related_links tables Documentation: - PHASE_A_ANALYSIS_FINDINGS.md: Entity inheritance analysis - Phase_A-DTO_Analysis.md: DTO Atom link analysis - Phase_A-Flyway_Migration_Inventory.md: Migration inventory - PHASE_A_COMPLETE_SUMMARY.md: Phase A completion summary Testing: All tests pass successfully across H2, MySQL, and PostgreSQL databases. No side effects detected in dependent modules (datacustodian, thirdparty). 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <[email protected]> * refactor: ESPI 4.0 Schema Compliance - Phase 0: Fix Object-based entities (Issue #28) This commit fixes PnodeRefEntity and ServiceDeliveryPointEntity to comply with ESPI 4.0 XSD specification. Both entities extend Object (not IdentifiedObject) and therefore should use Long IDs instead of UUID, and should not have Atom metadata fields (timestamps, links, related_links tables). Changes: - PnodeRefEntity: Removed IdentifiedObject inheritance, changed from UUID to Long ID - ServiceDeliveryPointEntity: Removed IdentifiedObject inheritance, mRID field, changed from UUID to Long ID - PnodeRefMapper & ServiceDeliveryPointMapper: Removed BaseIdentifiedObjectMapper - Repositories: Changed from JpaRepository<Entity, UUID> to <Entity, Long> - Flyway migrations: Moved service_delivery_points and pnode_refs table creation from base migrations (V1, V3) to vendor-specific V2 files due to auto-increment syntax differences (H2/MySQL: AUTO_INCREMENT, PostgreSQL: BIGSERIAL) - Tests: Updated to remove IdentifiedObject assertions and mRID references All 550 tests passing. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <[email protected]> --------- Co-authored-by: Claude Sonnet 4.5 <[email protected]>
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‎openespi-common/PHASE_A_ANALYSIS_FINDINGS.md‎

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‎openespi-common/PHASE_A_COMPLETE_SUMMARY.md‎

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‎openespi-common/Phase_A-DTO_Analysis.md‎

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# Phase A: DTO Analysis - Atom Link Serialization
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**Date**: 2026-01-06
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**Branch**: `fix/schema-compliance-analysis`
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**Related**: PHASE_A_ANALYSIS_FINDINGS.md
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---
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## Executive Summary
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Analysis of DTO files for 11 entities reveals:
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- ✅ **7 DTOs found** - ALL correctly have NO Atom link elements
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- ℹ️ **4 DTOs not found** - Likely embedded inline in parent DTOs
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- ⚠️ **1 DTO has entity/field mismatch** - StatementRefDto
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**Key Finding**: All existing DTOs are correctly implemented without Atom links. No DTO changes needed for Phase B-E.
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---
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## DTOs WITH Separate Files (7 found)
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All 7 DTOs are **correctly implemented** - NONE have Atom link elements:
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| # | DTO File | Has Atom Links? | Has mRID? | Access Type | Status | Notes |
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|---|----------|-----------------|-----------|-------------|--------|-------|
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| 1 | **IntervalReadingDto.java** | ❌ NO | ❌ NO | FIELD | ✅ Correct | Clean implementation |
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| 2 | **ReadingQualityDto.java** | ❌ NO | ❌ NO | FIELD | ✅ Correct | Clean implementation |
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| 3 | **PnodeRefDto.java** | ❌ NO | ❌ NO | PROPERTY | ✅ Correct | Uses getter methods |
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| 4 | **AggregatedNodeRefDto.java** | ❌ NO | ❌ NO | PROPERTY | ✅ Correct | Uses getter methods |
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| 5 | **ServiceDeliveryPointDto.java** | ❌ NO | ✅ YES (@XmlAttribute) | PROPERTY | ✅ Correct | mRID is NOT Atom link |
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| 6 | **StatementRefDto.java** | ❌ NO | ❌ NO | FIELD | ⚠️ WARNING | Entity/DTO field mismatch |
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| 7 | **RetailCustomerDto.java** | ❌ NO | ❌ NO | PROPERTY | ✅ Correct | Has collection refs |
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**Key Finding**: All DTOs correctly avoid Atom link elements (no selfLink, upLink, or relatedLinks).
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**StatementRefDto Warning**:
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- **Entity has**: fileName, mediaType, statementURL
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- **DTO has**: referenceId, referenceType, referenceDate, referenceUrl
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- **Issue**: Mapper will fail due to field name mismatch
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- **Action**: Needs field alignment in future PR (separate from schema compliance)
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---
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## DTOs WITHOUT Separate Files (4 not found)
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These entities don't have standalone DTO files:
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| # | Entity | DTO File | Likely Serialization Pattern |
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|---|--------|----------|------------------------------|
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| 8 | **LineItemEntity** | ❌ NOT FOUND | Embedded in UsageSummaryDto |
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| 9 | **PhoneNumberEntity** | ❌ NOT FOUND | Embedded in parent DTOs (Customer, ServiceSupplier, etc.) |
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| 10 | **SubscriptionEntity** | ❌ NOT FOUND | API-only entity, not ESPI resource |
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| 11 | **BatchListEntity** | ❌ NOT FOUND | Transient wrapper, not serialized |
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**Analysis**:
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- **LineItem**: Likely serialized inline within UsageSummaryDto.lineItems collection
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- **PhoneNumber**: Likely embedded in Organisation DTOs (Customer, ServiceSupplier)
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- **Subscription**: OAuth2 API entity, not part of ESPI XML resources
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- **BatchList**: Just a URI collection wrapper, may not need DTO at all
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---
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## Detailed DTO Findings
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### 1. IntervalReadingDto ✅
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**File**: `src/main/java/org/greenbuttonalliance/espi/common/dto/usage/IntervalReadingDto.java`
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**Structure**:
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```java
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@XmlRootElement(name = "IntervalReading", namespace = "http://naesb.org/espi")
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@XmlAccessorType(XmlAccessType.FIELD)
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@XmlType(propOrder = {
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"cost", "currency", "value", "timePeriod", "readingQualities",
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"consumptionTier", "tou", "cpp"
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})
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public record IntervalReadingDto(...)
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```
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**Fields**:
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- ✅ Only ESPI business data elements
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- ✅ NO Atom link elements
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- ✅ Javadoc correctly states: "Note: IntervalReading does NOT extend IdentifiedObject per ESPI 4.0 specification" (line 32)
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**Conclusion**: Perfect implementation - no changes needed.
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---
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### 2. ReadingQualityDto ✅
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**File**: `src/main/java/org/greenbuttonalliance/espi/common/dto/usage/ReadingQualityDto.java`
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**Structure**:
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```java
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@XmlRootElement(name = "ReadingQuality", namespace = "http://naesb.org/espi")
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@XmlAccessorType(XmlAccessType.FIELD)
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@XmlType(propOrder = { "quality" })
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public record ReadingQualityDto(...)
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```
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**Fields**:
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- ✅ Single field: quality
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- ✅ NO Atom link elements
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- ✅ Javadoc correctly states: "Note: ReadingQuality does NOT extend IdentifiedObject per ESPI 4.0 specification" (line 30)
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**Conclusion**: Perfect implementation - no changes needed.
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---
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### 3. PnodeRefDto ✅
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**File**: `src/main/java/org/greenbuttonalliance/espi/common/dto/usage/PnodeRefDto.java`
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**Structure**:
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```java
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@XmlAccessorType(XmlAccessType.PROPERTY)
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@XmlType(name = "PnodeRef", namespace = "http://naesb.org/espi", propOrder = {
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"apnodeType", "ref", "startEffectiveDate", "endEffectiveDate"
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})
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public record PnodeRefDto(...)
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```
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**Fields**:
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- ✅ Only pricing node business data
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- ✅ Uses PROPERTY access with getter methods (lines 48-77)
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- ✅ NO Atom link elements
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- ✅ NO mRID attribute
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**Conclusion**: Correct implementation - no changes needed.
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---
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### 4. AggregatedNodeRefDto ✅
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**File**: `src/main/java/org/greenbuttonalliance/espi/common/dto/usage/AggregatedNodeRefDto.java`
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**Structure**:
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```java
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@XmlAccessorType(XmlAccessType.PROPERTY)
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@XmlType(name = "AggregatedNodeRef", namespace = "http://naesb.org/espi", propOrder = {
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"anodeType", "ref", "startEffectiveDate", "endEffectiveDate", "pnodeRef"
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})
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public record AggregatedNodeRefDto(...)
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```
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**Fields**:
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- ✅ Only aggregated node business data
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- ✅ Includes nested PnodeRefDto (line 84)
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- ✅ Uses PROPERTY access with getter methods
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- ✅ NO Atom link elements
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**Conclusion**: Correct implementation - no changes needed.
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---
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### 5. ServiceDeliveryPointDto ✅ (with mRID attribute)
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**File**: `src/main/java/org/greenbuttonalliance/espi/common/dto/usage/ServiceDeliveryPointDto.java`
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**Structure**:
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```java
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@XmlRootElement(name = "ServiceDeliveryPoint", namespace = "http://naesb.org/espi")
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@XmlAccessorType(XmlAccessType.PROPERTY)
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@XmlType(propOrder = {
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"description", "name", "tariffProfile", "customerAgreement", "tariffRiderRefs"
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})
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public record ServiceDeliveryPointDto(...)
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```
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**Special Fields**:
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```java
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@XmlTransient
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public Long getId() {
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return id;
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}
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@XmlAttribute(name = "mRID")
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public String getUuid() {
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return uuid;
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}
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```
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**Analysis**:
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- ✅ Uses `@XmlAttribute(name = "mRID")` - this is **NOT an Atom link**
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- ✅ mRID is a business identifier defined in ESPI XSD, completely separate from Atom protocol
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- ✅ Javadoc correctly states: "ServiceDeliveryPoint is an embedded element within UsagePoint and contains only ESPI business data - no Atom metadata (links, timestamps) as it's not a standalone resource" (line 31-32)
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- ✅ NO selfLink, upLink, or relatedLinks elements
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**Conclusion**: mRID is an ESPI business identifier, NOT an Atom link. Implementation is correct.
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---
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### 6. StatementRefDto ⚠️ WARNING
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**File**: `src/main/java/org/greenbuttonalliance/espi/common/dto/customer/StatementRefDto.java`
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**Structure**:
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```java
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@XmlRootElement(name = "StatementRef", namespace = "http://naesb.org/espi/customer")
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@XmlAccessorType(XmlAccessType.FIELD)
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@XmlType(propOrder = {
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"referenceId", "referenceType", "referenceDate", "referenceUrl", "statement"
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})
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public record StatementRefDto(...)
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```
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**Javadoc Warning** (Line 34-37):
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> WARNING: DTO fields do not currently match entity fields.
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> Entity has: fileName, mediaType, statementURL
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> DTO has: referenceId, referenceType, referenceDate, referenceUrl
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> This mismatch needs to be resolved.
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**Critical Issue**: Entity/DTO field mismatch will cause mapper failures.
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**Entity Fields** (StatementRefEntity.java):
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```java
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private String fileName;
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private String mediaType;
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private String statementURL;
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```
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**DTO Fields** (StatementRefDto.java):
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```java
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String referenceId;
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String referenceType;
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OffsetDateTime referenceDate;
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String referenceUrl;
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```
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**Impact**:
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- ❌ MapStruct mapper cannot map between mismatched fields
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- ❌ Serialization/deserialization will fail
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- ❌ Integration tests likely failing for StatementRef
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**Recommendation**:
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- Create **separate issue** to fix StatementRefDto field alignment
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- NOT part of schema compliance remediation (different problem)
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- Should align DTO fields to match entity: fileName, mediaType, statementURL
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**Atom Link Status**:
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- ✅ NO Atom link elements (correctly implemented in this regard)
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---
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### 7. RetailCustomerDto ✅
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**File**: `src/main/java/org/greenbuttonalliance/espi/common/dto/usage/RetailCustomerDto.java`
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**Structure**:
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```java
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@XmlRootElement(name = "RetailCustomer", namespace = "http://naesb.org/espi")
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@XmlAccessorType(XmlAccessType.PROPERTY)
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@XmlType(propOrder = {
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"username", "firstName", "lastName", "email", "phone", "role",
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"enabled", "accountCreated", "lastLogin", "accountLocked",
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"failedLoginAttempts", "usagePoints", "authorizations"
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})
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public record RetailCustomerDto(...)
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```
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**Collection Fields**:
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```java
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List<UsagePointDto> usagePoints,
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List<AuthorizationDto> authorizations
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```
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**Analysis**:
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- ✅ Uses **direct collection references**, not Atom rel="related" links
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- ✅ This is correct for API DTOs that use FK-based relationships
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- ✅ NO Atom link elements (no selfLink, upLink, relatedLinks)
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- ✅ Represents API entity with direct relationships, not ESPI Atom resource
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**Conclusion**: RetailCustomerDto correctly implements direct FK pattern, not Atom linking pattern.
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---
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## Atom Link Element Verification
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**None of the 7 DTOs contain these Atom link patterns:**
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❌ NO `selfLink` element
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❌ NO `upLink` element
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❌ NO `relatedLinks` collection
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❌ NO `@XmlElement(name = "link")` with rel="self", rel="up", or rel="related"
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**Conclusion**: All DTOs are clean and compliant. No DTO changes needed for schema compliance remediation.
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---
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## Impact on Schema Compliance Remediation
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### Phase B-D: No DTO Changes Required
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**Good News**: All 7 existing DTOs are already compliant.
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**Tasks for Phase B-D**:
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1. ✅ DTOs already have NO Atom links - **no changes needed**
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2. ❌ Still need to remove `related_links` tables from database
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3. ❌ Still need to fix PnodeRefEntity and ServiceDeliveryPointEntity inheritance
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4. ❌ Still need to verify mappers work with non-IdentifiedObject entities
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**Phase B Impact**: NO DTO edits required for collection entities (IntervalReading, ReadingQuality, etc.)
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**Phase C Impact**: NO DTO edits required for API entities (RetailCustomer, Subscription)
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**Phase D Impact**: NO DTO edits required for special cases (ServiceDeliveryPoint, BatchList)
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---
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## Recommendations
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### 1. Fix StatementRefDto Field Mismatch (Separate Issue)
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**NOT part of schema compliance remediation**:
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- Create new issue for StatementRefDto entity/DTO field alignment
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- Update DTO fields to match entity: fileName, mediaType, statementURL
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- Fix mapper after field alignment
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### 2. Update Mappers for Non-IdentifiedObject Entities
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**Phase 0 prerequisite**:
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- After removing IdentifiedObject inheritance from PnodeRef and ServiceDeliveryPoint entities
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- Update mappers to NOT expect IdentifiedObject fields
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- Verify mapper tests pass
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---
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## Summary
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**DTO Analysis Complete**: ✅
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**Findings**:
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- ✅ All 7 existing DTOs correctly have NO Atom link elements
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- ✅ NO DTO changes needed for schema compliance remediation (Phases B-E)
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- ⚠️ StatementRefDto has entity/field mismatch (separate issue needed)
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- ℹ️ 4 entities have no standalone DTOs (inline serialization pattern)
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**Next Phase A Tasks**:
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1. Identify Flyway migration files requiring updates
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2. Create detailed inventory of changes required
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3. Update FLYWAY_SCHEMA_SUMMARY.md with findings
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4. Create migration script templates for Phases B-E
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---
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**Analysis Status**: ✅ Complete
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**DTOs Reviewed**: 7 of 11 (4 confirmed as inline/not needed)
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**Critical Issues**: 1 (StatementRefDto mismatch - separate from this remediation)

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