Add factory method to Reactive-/IsNewAwareAuditingHandler.

By providing a factory method that accepts the MappingContext we can avoid the creation of additional support beans during the configuration phase for store modules implementing auditing.

See: #2593

Author: christophstrobl

src/main/java/org/springframework/data/auditing/IsNewAwareAuditingHandler.java

@@ -36,7 +36,7 @@ public class IsNewAwareAuditingHandler extends AuditingHandler {
 	private final PersistentEntities entities;
 
 	/**
-	 * Creates a new {@link IsNewAwareAuditingHandler} for the given {@link MappingContext}.
+	 * Creates a new {@link IsNewAwareAuditingHandler} for the given {@link PersistentEntities}.
 	 *
 	 * @param entities must not be {@literal null}.
 	 * @since 1.10
@@ -48,6 +48,16 @@ public IsNewAwareAuditingHandler(PersistentEntities entities) {
 		this.entities = entities;
 	}
 
+	/**
+	 * Factory method that creates a new {@link IsNewAwareAuditingHandler} for the given {@link MappingContext}.
+	 *
+	 * @param mappingContext must not be {@literal null}.
+	 * @since 3.0
+	 */
+	public static IsNewAwareAuditingHandler from(MappingContext<?,?> mappingContext) {
+		return new IsNewAwareAuditingHandler(PersistentEntities.of(mappingContext));
+	}
+
 	/**
 	 * Marks the given object created or modified based on {@link PersistentEntity#isNew(Object)}. Will route the calls to
 	 * {@link #markCreated(Object)} and {@link #markModified(Object)} accordingly.

src/main/java/org/springframework/data/auditing/ReactiveIsNewAwareAuditingHandler.java

@@ -37,7 +37,7 @@ public class ReactiveIsNewAwareAuditingHandler extends ReactiveAuditingHandler {
 	private final PersistentEntities entities;
 
 	/**
-	 * Creates a new {@link ReactiveIsNewAwareAuditingHandler} for the given {@link MappingContext}.
+	 * Creates a new {@link ReactiveIsNewAwareAuditingHandler} for the given {@link PersistentEntities}.
 	 *
 	 * @param entities must not be {@literal null}.
 	 */
@@ -48,6 +48,16 @@ public ReactiveIsNewAwareAuditingHandler(PersistentEntities entities) {
 		this.entities = entities;
 	}
 
+	/**
+	 * Factory method that creates a new {@link ReactiveIsNewAwareAuditingHandler} for the given {@link MappingContext}.
+	 *
+	 * @param mappingContext must not be {@literal null}.
+	 * @since 3.0
+	 */
+	public static ReactiveIsNewAwareAuditingHandler from(MappingContext<?,?> mappingContext) {
+		return new ReactiveIsNewAwareAuditingHandler(PersistentEntities.of(mappingContext));
+	}
+
 	/**
 	 * Marks the given object created or modified based on {@link PersistentEntity#isNew(Object)}. Will route the calls to
 	 * {@link #markCreated(Object)} and {@link #markModified(Object)} accordingly.