Issue #2258 - Typeful Metadata

[homedirectory]

Resolve #2258, #2091.

This PR should be merged together with https://github.com/fieldenms/tglib-testing/pull/2.

Summary of changes

There have been a number of breaking changes associated with the removal of EQL3 metadata and EQL2 metadata, therefore TG applications need to be adjusted accordingly.

Metadata:

• EQL3 and EQL2 metadata have been removed and their usages replaced by Typeful Metadata
• Stricter validation of property definitions during metadata generation: unsupported property types are detected early (in some cases an unsupported type is shown mercy and corresponding property is simply skipped).
• Changes to Property Metadata:
  • Properties with a composite or a union entity type are classified according to their nature in the same way as other properties. This hadn't been the case with EQL3 metadata, which ignored the nature of such properties, instead forcing the caller to look at their sub-properties for this information.

Other changes:

• Value range validation (from-to) is now supported for BigDecimal.
• All generated proxy entity types now implement IProxyEntity.
• Generated ID-only proxy entity types now implement IIdOnlyProxyEntity.
• Test entity types were modified by replacing unsupported property types with supported ones (e.g., Double by BigDecimal).

Future work

• Encapsulate Hibernate type access in a standalone service. It should have the following API:

  Optional<?> hibernateType(PropertyMetadata property)

• Encapsulate EqlTable access in a standalone service. It should have the following API:

  EqlTable eqlTable(Class<? extends AbstractEntity<?>> entityType)

• Encapsulate TableStructForBatchInsertion access in a standalone service. It should have the following API:

  TableStructForBatchInsertion tableStructForBatchInsertion(Class<? extends AbstractEntity<?>> entityType)

• Encapsulate database DDL generation in a standalone service. It should have the following API:

  List<String> generateDatabaseDdl(Dialect dialect)

• Configure dependency injection and decouple IDomainMetadata from QuerySourceInfoProvider.

[homedirectory]

Due to certain difficulties during merging, 1250408 was created by hand (with git commit-tree) and thus wasn't automatically signed.