Add Helper Entity

src/main/kotlin/fr/postgresjson/entity/Entity.kt

@@ -1,16 +1,90 @@
 package fr.postgresjson.entity
 
+import org.joda.time.DateTime
 import java.util.*
 
+/* ID */
 interface EntityI<T> {
     var id: T?
 }
+
 abstract class Entity<T>(override var id: T? = null) : EntityI<T?>
 abstract class UuidEntity(override var id: UUID? = UUID.randomUUID()) : Entity<UUID?>(id)
 abstract class IdEntity(override var id: Int? = null) : Entity<Int?>(id)
 
+/* Version */
 interface EntityVersioning<T> {
     var version: T
 }
 
-interface EntityVersioningIncrement : EntityVersioning<Int>
+interface EntityVersioningIncrement : EntityVersioning<Int?>
+class EntityVersioningIncrementImp() : EntityVersioningIncrement {
+    override var version: Int? = null
+}
+
+interface EntityVersioningDate : EntityVersioning<DateTime?>
+class EntityVersioningDateImp() : EntityVersioningDate {
+    override var version: DateTime? = null
+}
+
+/* Dates */
+interface EntityCreatedAt {
+    var createdAt: DateTime?
+}
+
+interface EntityUpdatedAt {
+    var updatedAt: DateTime?
+}
+
+class EntityCreatedAtImp : EntityCreatedAt {
+    override var createdAt: DateTime? = null
+}
+
+class EntityUpdatedAtImp : EntityUpdatedAt {
+    override var updatedAt: DateTime? = null
+}
+
+interface User<T> : EntityI<T> {
+    fun isValid(): Boolean
+}
+
+/* Author */
+interface CreatedBy<T> {
+    var createdBy: User<T>?
+}
+
+interface UpdatedBy<T> {
+    var updatedBy: User<T>?
+}
+
+class EntityCreatedByImp<T> : CreatedBy<T> {
+    override var createdBy: User<T>? = null
+}
+
+class EntityUpdatedByImp<T> : UpdatedBy<T> {
+    override var updatedBy: User<T>? = null
+}
+
+/* Published */
+interface Published<UserT> {
+    var publishedAt: DateTime?
+    var publishedBy: User<UserT>?
+}
+
+class EntityPublishedImp<UserT> : Published<UserT> {
+    override var publishedAt: DateTime? = null
+    override var publishedBy: User<UserT>? = null
+}
+
+/* Implementation */
+abstract class EntityImp<T, UserT> : Entity<T>(),
+    EntityCreatedAt by EntityCreatedAtImp(),
+    EntityUpdatedAt by EntityUpdatedAtImp(),
+    CreatedBy<UserT> by EntityCreatedByImp(),
+    UpdatedBy<UserT> by EntityUpdatedByImp()
+
+abstract class EntityExtended<T, UserT> :
+    EntityImp<T, UserT>(),
+    EntityVersioningIncrement by EntityVersioningIncrementImp(),
+    Published<UserT> by EntityPublishedImp()
+