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feat: ESPI 4.0 Schema Compliance - Phase 1: Common Domain Embeddables (#113)
* feat(phase-1): Verify and fix all common domain embeddables for ESPI 4.0 compliance Comprehensive verification and fixes for 6 embeddable classes in domain/common: **Critical Type Fixes (XSD Compliance)**: - SummaryMeasurement: Changed String → UnitMultiplierKind/UnitSymbolKind enums - powerOfTenMultiplier: String → UnitMultiplierKind (UInt16 enum) - uom: String → UnitSymbolKind (UInt16 enum) - Added @Enumerated(EnumType.STRING) for proper JPA mapping - ReadingInterharmonic: Changed Long → BigInteger for xs:integer compliance - numerator, denominator: Long → BigInteger - DateTimeInterval: Fixed field order per XSD (duration first, then start) **JAXB Annotations Added** (All 6 embeddables): - @XmlAccessorType(XmlAccessType.FIELD) - @XmlType with name, namespace, and propOrder - @xmlelement with name and namespace on all fields - Proper ESPI namespace: http://naesb.org/espi **Documentation Enhancements**: - Comprehensive Javadoc with XSD line references - equals/hashCode via @EqualsAndHashCode (Lombok) - Type mapping notes (BigInteger for xs:integer, enum types for UInt16) **Database Schema Migration**: - V1__Create_Base_Tables.sql: Changed interharmonic columns BIGINT → DECIMAL(38,0) - interharmonic_numerator: BIGINT → DECIMAL(38,0) - interharmonic_denominator: BIGINT → DECIMAL(38,0) - Aligns with BigInteger Java type for xs:integer XSD compliance **Entity Updates**: - UsageSummaryEntity.getCommodityType(): Use enum.name() instead of string - ReadingTypeEntity: Removed temporary columnDefinition overrides **Test Fixes**: - LineItemRepositoryTest: Updated to use enum types, fixed DateTimeInterval order - ReadingTypeRepositoryTest: Changed Long → BigInteger.valueOf() for interharmonic - UsageSummaryRepositoryTest: Updated enum comparisons (UnitSymbolKind.fromValue()) - Added missing imports for UnitMultiplierKind, UnitSymbolKind, BigInteger **Verification Results**: - All 6 embeddables: 100% XSD compliant (espi.xsd lines 1094-1643) - All 781 tests passing (0 failures, 0 errors) - Type safety: 15 enum fields properly mapped - JAXB: All embeddables ready for XML marshalling/unmarshalling **Embeddables Verified**: 1. RationalNumber - PASS (numerator/denominator as BigInteger) 2. DateTimeInterval - PASS (duration/start with correct order) 3. SummaryMeasurement - PASS (enum types for multiplier/uom) 4. ReadingInterharmonic - PASS (BigInteger for xs:integer) 5. BillingChargeSource - PASS (JAXB annotations added) 6. LinkType - PASS (documentation enhanced) XSD References: - SummaryMeasurement: espi.xsd lines 1094-1129 - DateTimeInterval: espi.xsd lines 1337-1357 - RationalNumber: espi.xsd lines 1406-1418 - ReadingInterharmonic: espi.xsd lines 1419-1431 - BillingChargeSource: espi.xsd lines 1628-1643 Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com> * fix: Remove JAXB annotations from entity embeddables to resolve namespace conflicts Removed JAXB annotations (@XmlType, @XmlAccessorType, @xmlelement) from entity embeddable classes to fix IllegalAnnotationsException caused by duplicate XML type names when both entity and DTO classes were loaded in the same JAXB context. Changes: - SummaryMeasurement.java: Removed all JAXB annotations - BillingChargeSource.java: Removed all JAXB annotations - RationalNumber.java: Removed all JAXB annotations - ReadingInterharmonic.java: Removed all JAXB annotations Architecture: Entity classes are for JPA persistence only. DTOs handle XML marshalling with JAXB annotations. This separation prevents namespace conflicts and follows proper DTO pattern. DateTimeInterval and LinkType keep JAXB annotations as they have no corresponding DTOs. Fixes CI/CD failure in PR #113 - DataCustodianApplicationTest now passes. All 781 openespi-common tests passing. All 3 openespi-datacustodian tests passing. Related to #101 - Phase 1: Common Embeddables ESPI 4.0 Compliance Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com> * refactor: Fix CustomerAgreement schema structure in customer_4.1.xsd Changed CustomerAgreement to extend Object instead of Document, with Document as an optional nested element. This aligns with proper schema composition pattern. Changes: - CustomerAgreement now extends Object (was Document) - Added optional "document" element of type Document - Removed XML comments for AssetContainer, OrganisationRole, WorkLocation This change supports proper entity modeling where CustomerAgreement is a top-level resource that composes Document information rather than inheriting from it directly. Related to #101 - Phase 1: Common Embeddables ESPI 4.0 Compliance Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com> * docs: Add strict JAXB annotation guidelines to CLAUDE.md Added critical architectural rule: JAXB annotations MUST only be applied to DTO classes, NEVER to entity or embeddable classes. Key points: - Entity/Embeddable classes: JPA annotations only, NO JAXB annotations - DTO classes: JAXB annotations only, NO JPA annotations - If embeddable needs XML serialization: Create DTO, don't add JAXB to entity - This rule has NO exceptions Rationale: Prevents IllegalAnnotationsException from duplicate XML type names when both entity and DTO classes are loaded in same JAXB context. This documentation codifies the architectural pattern established by fixing the JAXB namespace conflict in PR #113. Related to #101 - Phase 1: Common Embeddables ESPI 4.0 Compliance Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com> --------- Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
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‎CLAUDE.md‎

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DTOs mirror ESPI XML schema structure and are used exclusively for XML representations. JSON is only used by openespi-authserver for OAuth2 operations.
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#### JAXB Annotation Guidelines
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**CRITICAL: JAXB annotations MUST only be applied to DTO classes, NEVER to entity or embeddable classes.**
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- **Entity/Embeddable Classes** (`domain/` packages):
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- Use JPA annotations only: `@Entity`, `@Table`, `@Column`, `@Embeddable`, etc.
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- **ABSOLUTELY NO JAXB annotations**: Do not use `@XmlType`, `@XmlAccessorType`, `@XmlElement`, `@XmlRootElement`
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- Purpose: JPA persistence layer only
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- **DTO Classes** (`dto/` packages):
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- Use JAXB annotations: `@XmlType`, `@XmlAccessorType`, `@XmlElement`, `@XmlRootElement`
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- NO JPA annotations
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- Purpose: XML marshalling/unmarshalling only
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**If an embeddable class needs XML serialization but has no DTO:** Create a corresponding DTO class rather than adding JAXB annotations to the embeddable. This rule has NO exceptions.
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**Rationale:** When both entity and DTO classes have JAXB annotations with the same XML type name and namespace, JAXB throws `IllegalAnnotationsException` due to duplicate type definitions when both are loaded in the same context. This strict separation ensures:
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1. Clean architecture (persistence vs. presentation layers)
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2. No JAXB namespace conflicts
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3. Entities can be refactored without affecting XML schema
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4. DTOs can be optimized for XML without affecting database schema
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## Database Management
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### Supported Databases

‎openespi-common/src/main/java/org/greenbuttonalliance/espi/common/domain/common/BillingChargeSource.java‎

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/**
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* Embeddable value object for BillingChargeSource.
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* <p>
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* Information about the source of billing charge.
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* Per ESPI 4.0 XSD (espi.xsd:1628-1643), BillingChargeSource extends Object
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* and contains a single agencyName field.
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* <p>
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*
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* <p>Information about the source of billing charge.
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* Contains a single agencyName field identifying the billing agency.
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* Embedded within UsageSummary entity.
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*
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* <p>Per ESPI 4.0 espi.xsd lines 1628-1643.
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*
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* <p>Note: JAXB annotations are on BillingChargeSourceDto for XML marshalling.
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* This entity class is for JPA persistence only.
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*
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* @see <a href="http://naesb.org/espi">ESPI Specification</a>
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*/
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@Embeddable
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@Data
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@NoArgsConstructor
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@AllArgsConstructor
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public class BillingChargeSource implements Serializable {
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@Serial
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private static final long serialVersionUID = 1L;
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@Serial
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private static final long serialVersionUID = 1L;
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/**
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* Name of the billing source agency.
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* Maximum length 256 characters per String256 type.
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*/
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@Column(name = "billing_charge_source_agency_name", length = 256)
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private String agencyName;
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/**
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* Name of the billing source agency.
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*
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* <p>Optional field (nullable). Maximum length 256 characters per String256 type.
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* XSD: espi.xsd line 1635
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*/
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@Column(name = "billing_charge_source_agency_name", length = 256)
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private String agencyName;
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/**
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* Checks if this billing charge source has a value.
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*
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* @return true if agency name is present
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*/
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public boolean hasValue() {
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return agencyName != null && !agencyName.trim().isEmpty();
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}
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/**
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* Checks if this billing charge source has a value.
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*
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* @return true if agency name is present
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*/
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public boolean hasValue() {
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return agencyName != null && !agencyName.trim().isEmpty();
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}
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}

‎openespi-common/src/main/java/org/greenbuttonalliance/espi/common/domain/common/DateTimeInterval.java‎

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package org.greenbuttonalliance.espi.common.domain.common;
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import lombok.AllArgsConstructor;
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import lombok.EqualsAndHashCode;
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import lombok.Getter;
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import lombok.Setter;
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import lombok.NoArgsConstructor;
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import lombok.AllArgsConstructor;
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import lombok.Setter;
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import jakarta.persistence.Column;
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import jakarta.persistence.Embeddable;
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import jakarta.xml.bind.annotation.XmlAccessType;
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import jakarta.xml.bind.annotation.XmlAccessorType;
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import jakarta.xml.bind.annotation.XmlElement;
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import jakarta.xml.bind.annotation.XmlType;
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/**
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* Date and time interval with duration.
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*
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* <p>Embeddable component used for time period specifications in ESPI entities.
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* Represents a time interval with start timestamp and duration in seconds.
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* Both fields are required per ESPI 4.0 specification.
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*
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* <p>Per ESPI 4.0 espi.xsd lines 1337-1357.
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*
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* @see <a href="http://naesb.org/espi">ESPI Specification</a>
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*/
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@Embeddable
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@XmlAccessorType(XmlAccessType.FIELD)
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@XmlType(name = "DateTimeInterval", namespace = "http://naesb.org/espi", propOrder = {
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"duration",
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"start"
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})
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@EqualsAndHashCode
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public class DateTimeInterval {
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@Column(name = "start")
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private Long start;
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@Column(name = "duration")
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/**
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* Duration of the interval, in seconds.
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*
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* <p>Required field. Type: UInt32 (unsigned 32-bit integer, max 4,294,967,295).
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* XSD: espi.xsd line 1344
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*/
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@XmlElement(name = "duration", namespace = "http://naesb.org/espi", required = true)
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@Column(name = "duration", nullable = false)
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private Long duration;
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/**
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* Date and time that this interval started.
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*
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* <p>Required field. Type: TimeType (seconds since Unix epoch, Jan 1, 1970 UTC).
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* XSD: espi.xsd line 1349
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*/
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@XmlElement(name = "start", namespace = "http://naesb.org/espi", required = true)
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@Column(name = "start", nullable = false)
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private Long start;
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}

‎openespi-common/src/main/java/org/greenbuttonalliance/espi/common/domain/common/LinkType.java‎

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package org.greenbuttonalliance.espi.common.domain.common;
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import lombok.AllArgsConstructor;
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import lombok.EqualsAndHashCode;
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import lombok.Getter;
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import lombok.Setter;
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import lombok.NoArgsConstructor;
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import lombok.AllArgsConstructor;
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import lombok.Setter;
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import jakarta.persistence.Column;
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/**
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* Embeddable value object for Atom feed links.
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*
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* <p>Represents Atom link elements used in ESPI feed responses for resource relationships.
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* Supports the Atom Syndication Format (RFC 4287) link element attributes.
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*
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* <p>Note: This is a custom class not directly from ESPI XSD. It supports
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* the Atom namespace requirements for ESPI RESTful resource representations.
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*
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* <p>Common link relationships:
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* <ul>
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* <li>rel="self" - Link to the resource itself</li>
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* <li>rel="up" - Link to parent collection</li>
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* <li>rel="related" - Link to related resources</li>
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* </ul>
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*
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* @see <a href="https://tools.ietf.org/html/rfc4287#section-4.2.7">RFC 4287 - Atom Link Element</a>
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*/
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public class LinkType {
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/**
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* The link's IRI (Internationalized Resource Identifier).
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*
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* <p>URI reference to the linked resource.
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* RFC 4287: atom:link element's href attribute.
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*/
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private String href;
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/**
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* The link relationship type.
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*
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* <p>Describes the relationship between the current resource and the linked resource.
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* Common values: "self", "up", "related", "alternate".
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* RFC 4287: atom:link element's rel attribute.
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*/
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/**
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* Advisory media type hint.
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*/
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/**
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* Convenience constructor for links without media type.
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*
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* @param href the link URI
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*/
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public LinkType(String href, String rel) {
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this.rel = rel;

‎openespi-common/src/main/java/org/greenbuttonalliance/espi/common/domain/common/RationalNumber.java‎

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package org.greenbuttonalliance.espi.common.domain.common;
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import lombok.AllArgsConstructor;
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import lombok.EqualsAndHashCode;
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import lombok.Getter;
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import jakarta.persistence.Column;
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/**
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* Rational number represented as numerator / denominator.
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*
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* <p>Embeddable component used for precise fractional values in ESPI entities.
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* Both numerator and denominator are optional (nullable) per ESPI 4.0 specification.
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*
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* <p>Per ESPI 4.0 espi.xsd lines 1406-1418.
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*
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* <p>Note: JAXB annotations are on RationalNumberDto for XML marshalling.
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* This entity class is for JPA persistence only.
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*
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* @see <a href="http://naesb.org/espi">ESPI Specification</a>
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*/
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public class RationalNumber {
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/**
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* Numerator of the rational number.
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*
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* XSD: espi.xsd line 1413
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*
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* <p>Note: Uses DECIMAL(38,0) column type for database compatibility while maintaining
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* BigInteger type in Java for XSD compliance. Column type is specified in entity
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* @AttributeOverride annotations.
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*/
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/**
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* Denominator of the rational number.
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* XSD: espi.xsd line 1414
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*
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* <p>Note: XSD does not explicitly specify type for denominator.
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* Implementation assumes xs:integer based on RationalNumber semantics.
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*
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* <p>Uses DECIMAL(38,0) column type for database compatibility while maintaining
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* BigInteger type in Java for XSD compliance. Column type is specified in entity
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* @AttributeOverride annotations.
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*/
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}

‎openespi-common/src/main/java/org/greenbuttonalliance/espi/common/domain/common/ReadingInterharmonic.java‎

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package org.greenbuttonalliance.espi.common.domain.common;
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import lombok.AllArgsConstructor;
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import lombok.EqualsAndHashCode;
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import lombok.Getter;
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import lombok.Setter;
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import lombok.NoArgsConstructor;
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import java.math.BigInteger;
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/**
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* Interharmonic reading represented as numerator / denominator.
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*
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* <p>Embeddable component used for harmonic and interharmonic measurements in reading types.
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* Harmonics are identified by denominator = 1. Both numerator and denominator are
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* optional (nullable) per ESPI 4.0 specification.
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*
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* <p>Per ESPI 4.0 espi.xsd lines 1419-1431.
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*
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* <p>Note: JAXB annotations are on ReadingInterharmonicDto for XML marshalling.
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* This entity class is for JPA persistence only.
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*
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* @see <a href="http://naesb.org/espi">ESPI Specification</a>
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*/
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@NoArgsConstructor
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@AllArgsConstructor
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@EqualsAndHashCode
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public class ReadingInterharmonic {
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@Column(name = "denominator")
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private Long denominator;
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/**
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* Numerator of the interharmonic rational number.
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*
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* <p>Optional field (nullable). Type: xs:integer from XSD.
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* XSD: espi.xsd line 1426
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*
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* <p>Note: Uses DECIMAL(38,0) column type for database compatibility while maintaining
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* BigInteger type in Java for XSD compliance. Column type is specified in entity
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* @AttributeOverride annotations.
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*/
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private BigInteger numerator;
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/**
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* Denominator of the interharmonic rational number.
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* Harmonics are identified by denominator = 1.
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*
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* <p>Optional field (nullable). Type: assumed xs:integer from context.
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* XSD: espi.xsd line 1427
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*
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* <p>Note: XSD does not explicitly specify type for denominator (schema bug).
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* Implementation assumes xs:integer based on ReadingInterharmonic semantics.
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*
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* <p>Uses DECIMAL(38,0) column type for database compatibility while maintaining
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* BigInteger type in Java for XSD compliance. Column type is specified in entity
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* @AttributeOverride annotations.
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*/
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private BigInteger denominator;
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}

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