#146 - Replace EntityCallback lambdas in MongoDB benchmarks.

Use a dedicated class instead of a lambda expression  because we cannot capture the entity type when using the latter which leads to false results when callbacks that should not be called get invoked due to their Object type signature.

closes: #146

benchmark/mongodb/src/main/java/org/springframework/data/microbenchmark/mongodb/AfterConvertCallbacksBenchmark.java

@@ -99,7 +99,13 @@ public class AfterConvertCallbacksBenchmark extends AbstractMicrobenchmark {
 
 		@Bean
 		AfterConvertCallback<Person> afterConvertCallback() {
-			return (it, document, collection) -> {
+			return new PersonAfterConvertCallback();
+		}
+
+		private static class PersonAfterConvertCallback implements AfterConvertCallback<Person> {
+
+			@Override
+			public Person onAfterConvert(Person it, Document document, String collection) {
 
 				Person target = new Person();
 				target.id = it.id;
@@ -108,7 +114,7 @@ public class AfterConvertCallbacksBenchmark extends AbstractMicrobenchmark {
 
 				target.address = it.address;
 				return target;
-			};
+			}
 		}
 	}
 

benchmark/mongodb/src/main/java/org/springframework/data/microbenchmark/mongodb/CallbacksBenchmark.java

@@ -100,7 +100,13 @@ public class CallbacksBenchmark extends AbstractMicrobenchmark {
 
 		@Bean
 		BeforeConvertCallback<Person> convertCallback() {
-			return (it, document) -> {
+			return new PersonBeforeConvertCallback();
+		}
+
+		private static class PersonBeforeConvertCallback implements BeforeConvertCallback<Person> {
+
+			@Override
+			public Person onBeforeConvert(Person it, String document) {
 
 				Person target = new Person();
 				target.id = it.id;
@@ -109,7 +115,7 @@ public class CallbacksBenchmark extends AbstractMicrobenchmark {
 
 				target.address = it.address;
 				return target;
-			};
+			}
 		}
 	}
 }