Resolved dependency cycles in repository and mapping packages. Introduced repository.core package as well as core.support where most of the type of former repository.support is in now. New repository.support only contains additional stuff built on top of core repository abstraction (e.g. Converters, PropertyEditors). Added some more unit tests to core mapping abstractions and removed not needed methods from its API.
All simple type discovery is now done through a SimpletypeHolder instance that carries a few default types considered to be simple but is configurable to carry additional ones. The mapping subsystem uses an instance of that class to do simple type decisions and thus allows customizing what is to be considered a simple type by simply dependency injecting a value object.
TypeDiscoverer now looks up property type using a PropertyDescriptor if no field with the given name can be found. Property now handles _-prefixed properties as well.
Creating bean instances, getting and setting properties on a bean was done by using static methods on MappingBeanHelper so far. This required certain Spring components (ConversionService) being held statically as well. Beyond that various Spring components had set these static values which might cause strange behavior if multiple instances of these Spring components are created. Thus we now have a BeanWrapper that takes the formerly statically held instances and uses those for bean creation and property access.
Moved SpEL awareness of a mapping into SpELAwareParameterValueProvider to hide it behind an ParameterValueProvider instance.
Various improvements and additional test cases for the TypeInformation abstraction. Introduced ParameterizedTypeInformation in-between class to take the parent into account when calculating equals(…) and hashCode(). We're also shortcutting TypeInformation creation if the parent's underlying type equals the one we shall create a new TypeInformation for.
Slightly modified the parsing algorithm when adding PersistentEntity objects. We now eagerly add them to the cache to prevent endless recursive adding.
Introduced an @RepositoryProxy annotation that can be used as alternative to extending Repository. Added necessary RepositoryMetadata implementation to introspect the annotation rather than the generic types. Enabled bean definition parsers to pick up annotation based repositories as well.
This change allows creating repository proxies without exposing CRUD methods at the same time. This essentially enables query-method-only repository interfaces.
Added custom TransactionAttributeSource that favors interface transaction configuration over the implementation configuration. This allows us configuring repository implementations with @Transactional but allow overriding this configuration at the user's repository level as well.
We now assume scanning for all sub-interfaces of Repository by default now. Thus concrete modules can pretty much drop the implementation of this method in their concrete config implementations in case they support picking up user's repository interfaces that extend Repository only.
From a users perspective this drops the requirement to extend a persistence technology specific interface (MongoRepository, JpaRepository and the like).
Algorithm is now was follows:
1. If there's no explicit constructor use the default constructor.
2. If there's a single explicit constructor, use this one.
3. If there's multiple explicit constructors and one has been annotated with @PersistenceConstructor use the annotated one.
4. If there's multiple explicit constructors and none annotated use the no-arg one or throw an exception to resolve the ambiguity.
Test cases for that algorithm are located in PreferredConstructorDiscovererUnitTests. Refactored PreferredConstructor and Parameter classes a little to make them immutable value objects. Introduced ability to lookup parameter TypeInformation for constructors on TypeInformation interface.
Extended generics in mapping subsystem to allow defining a concrete subtype of PersistentProperty as well. Removed some generics related compiler warnings as well.
Unfortunately the beta version numbers of Querydsl are not OSGi compatible so that we have to maintain the version number in template.mf manually. Updated version of APT Maven plugin to 1.0.1.
Refactored BasicMappingContext into AbstractMappingContext that now only contains the general algorithm to build PersistentEntity and PersistentProperty instances. The algorithm delegates to two template methods that are responsible for instantiating concrete implementations of those classes.
Extracted an AnnotationBasedPersistentProperty that now contains all annotation references so that AbstractPersistentEntity does not take annotations into account in the first places. BasicPersistentEntity now does PreferredConstructor lookup as well.
Removed unnecessary methods from MappingCOntext and PersistentEntity interface. Added a verify() method to BasicPersistentEntity that AbstractMappingContext calls to verify validity of the entity. This will be used by the Mongo module for example to make sure @Document annotated entities have an @Id property.
Refactored getValueAnnotation() to getSpelExpression() to not imply we're using annotations in every case.
Added shortcut in TypeDiscoverer.createInfo(…) to prevent endless loop in case a type has a field of it's very same type.
TypeDiscoverer now returns the plain compound type for arrays now, which means you get String for String[], String[][] and so on. Opened up signature of AbstractMappingContext.setInitialEntitySet(…) to allow effortless programatic invocation.
