FLAG-87: Complete Configuration to Platform 2.8/Java 21 (Resolves All Compiler Issues)

[Abhxay]

Module now targets OpenMRS Platform 2.8.0 and successfully compiles using Java 21.

Key Configuration Fixes 1. Dependency Management: Added maven-parent-openmrs-module:1.1.0 and explicitly defined required module versions to resolve "version is missing" errors. 2. Java 21 Compliance: Upgraded to 1.18.30 and configured maven-compiler-plugin to target Java 21. 3. Testing Bridge: Added necessary test dependencies (spring-test, junit-vintage-engine) to link JUnit 4 tests to the modern Java 21 runtime.

The build currently fails test execution (even with the vintage engine) due to incompatibility with libraries like PowerMock. This requires a dedicated PR to refactor all static mocks using modern Mockito methods.

[wikumChamith]

@Abhxay did you get a chance to take a look at these?

https://github.com/openmrs/openmrs-module-htmlformentry/pull/320/files

https://openmrs.atlassian.net/jira/polaris/projects/OMRS/ideas/view/3970978?selectedIssue=OMRS-341

[Abhxay]

@Abhxay did you get a chance to take a look at these?

https://github.com/openmrs/openmrs-module-htmlformentry/pull/320/files

https://openmrs.atlassian.net/jira/polaris/projects/OMRS/ideas/view/3970978?selectedIssue=OMRS-341

Action Required: New JIRA Issue

I have finalized and pushed the solution for the Configuration Phase (PR #104). The project now compiles successfully against Java 21.

The next major task is the Test and Code Refactoring required to achieve full Java 21 compatibility. Please create a new JIRA issue for the following work:

Refactor API/FHIR Tests: Migrate PowerMock to Mockito and Resolve Deprecations.

[Abhxay]

PR Status Update: Java 21 & Platform 2.8.0 Migration
I have completed the core structural updates for the Java 21 migration, but I am currently blocked by a persistent NoSuchTableException for the patientflags_flag table during unit tests.

Completed Fixes:
Java 21 Compatibility: Added the ByteBuddy bytecode provider to test-hibernate.cfg.xml and configured the Maven Surefire plugin to use the ByteBuddy agent to prevent proxying errors.

Referential Integrity: Updated the XML dataset sequencing (ensuring Person and Metadata precede Patient and Concepts) to fix previous IntegrityConstraintViolation errors.

DAO Layer: Updated HibernateFlagDAO to use DbSessionFactory in alignment with Hibernate 5 requirements for Platform 2.8.0.

Current Blocker:
Despite including the module mappings in test-hibernate.cfg.xml and setting hibernate.hbm2ddl.auto to update, the H2 in-memory database is not generating the module tables during the BaseModuleContextSensitiveTest execution.

Error logs:
Plaintext

org.dbunit.dataset.NoSuchTableException: patientflags_flag
at org.openmrs.test.BaseContextSensitiveTest.executeDataSet(BaseContextSensitiveTest.java:723)