README.adoc

Description:

Introduction of new domain including explicit projection declaration

Goals:

• Demonstrate explicit projection declaration

• Demonstrate projection customizations

• Demonstrate custom JSON deserialization/serialization for a projection field

• Demonstrate maintenance to/from a synthetic map to a different JPA domain structure

• Builds On : 01600-newDomainComplexField, 00300-productExtensionExplicitProjection

Key Steps:

• Create spring boot autoconfiguration class NewDomainExplicitProjection, which will be referenced from META-INF/spring.factories

• Setup domain (see 1600-newDomainComplexField)

• Additionally, make ChargingStation implements BusinessTypeAware and ModelMapperMappable

• Create a projection class (ChargingStationProjection)

• Implement getBusinessDomainType() in ChargingStation and return ChargingStationProjection as the type

• Implement toMe/fromMe in ChargingStation (from ModelMapperMappable contract)

  • ModelMapper will automatically map similar fields

  • For unusual mappings, use a post converter

  • Create a ModelMapper type map for your repository domain and projection and register your post converter

• Declare @EnableJpaTrackableFlow on the autoconfiguration class to setup the lifecycle plumbing for the new domain class

• Declare @AutoConfigureBefore on the autoconfiguration class to scan the new domain class before JPA processing