Reduce public API surface.

Limit exposure of API methods to package visibility.
Also remove fields and methods not directly required to support current feature scope.
Finally add missing since tags and provide additional tests.

See: #2971

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/CrudMethodMetadata.java

@@ -15,7 +15,6 @@
  */
 package org.springframework.data.mongodb.repository.support;
 
-import java.lang.reflect.Method;
 import java.util.Optional;
 
 import com.mongodb.ReadPreference;
@@ -25,6 +24,7 @@
  * execution.
  *
  * @author Mark Paluch
+ * @author Christoph Strobl
  * @since 4.2
  */
 public interface CrudMethodMetadata {
@@ -36,10 +36,4 @@ public interface CrudMethodMetadata {
 	 */
 	Optional<ReadPreference> getReadPreference();
 
-	/**
-	 * Returns the {@link Method} that this metadata applies to.
-	 *
-	 * @return the {@link Method} that this metadata applies to.
-	 */
-	Method getMethod();
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/CrudMethodMetadataPostProcessor.java

@@ -45,6 +45,8 @@
  * information or query hints on them.
  *
  * @author Mark Paluch
+ * @author Christoph Strobl
+ * @since 4.2
  */
 class CrudMethodMetadataPostProcessor implements RepositoryProxyPostProcessor, BeanClassLoaderAware {
 
@@ -103,13 +105,15 @@ static class CrudMethodMetadataPopulatingMethodInterceptor implements MethodInte
 		 */
 		static MethodInvocation currentInvocation() throws IllegalStateException {
 
-			MethodInvocation mi = currentInvocation.get();
+			MethodInvocation invocation = currentInvocation.get();
 
-			if (mi == null)
-				throw new IllegalStateException(
-						"No MethodInvocation found: Check that an AOP invocation is in progress, and that the "
-								+ "CrudMethodMetadataPopulatingMethodInterceptor is upfront in the interceptor chain.");
-			return mi;
+			if (invocation != null) {
+				return invocation;
+			}
+
+			throw new IllegalStateException(
+					"No MethodInvocation found: Check that an AOP invocation is in progress, and that the "
+							+ "CrudMethodMetadataPopulatingMethodInterceptor is upfront in the interceptor chain.");
 		}
 
 		@Override
@@ -163,7 +167,6 @@ public Object invoke(MethodInvocation invocation) throws Throwable {
 	static class DefaultCrudMethodMetadata implements CrudMethodMetadata {
 
 		private final Optional<ReadPreference> readPreference;
-		private final Method method;
 
 		/**
 		 * Creates a new {@link DefaultCrudMethodMetadata} for the given {@link Method}.
@@ -175,7 +178,6 @@ static class DefaultCrudMethodMetadata implements CrudMethodMetadata {
 			Assert.notNull(method, "Method must not be null");
 
 			this.readPreference = findReadPreference(method);
-			this.method = method;
 		}
 
 		private Optional<ReadPreference> findReadPreference(Method method) {
@@ -201,11 +203,6 @@ private Optional<ReadPreference> findReadPreference(Method method) {
 		public Optional<ReadPreference> getReadPreference() {
 			return readPreference;
 		}
-
-		@Override
-		public Method getMethod() {
-			return method;
-		}
 	}
 
 	private static class ThreadBoundTargetSource implements TargetSource {

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleMongoRepository.java

@@ -357,8 +357,9 @@ public <S extends T, R> R findBy(Example<S> example,
 	 * applied to queries.
 	 *
 	 * @param crudMethodMetadata
+	 * @since 4.2
 	 */
-	public void setRepositoryMethodMetadata(CrudMethodMetadata crudMethodMetadata) {
+	void setRepositoryMethodMetadata(CrudMethodMetadata crudMethodMetadata) {
 		this.crudMethodMetadata = crudMethodMetadata;
 	}
 

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleReactiveMongoRepository.java

@@ -434,8 +434,9 @@ public <S extends T, R, P extends Publisher<R>> P findBy(Example<S> example,
 	 * applied to queries.
 	 *
 	 * @param crudMethodMetadata
+	 * @since 4.2
 	 */
-	public void setRepositoryMethodMetadata(CrudMethodMetadata crudMethodMetadata) {
+	void setRepositoryMethodMetadata(CrudMethodMetadata crudMethodMetadata) {
 		this.crudMethodMetadata = crudMethodMetadata;
 	}
 

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/support/MongoRepositoryFactoryUnitTests.java

@@ -20,6 +20,7 @@
 
 import java.io.Serializable;
 import java.util.Optional;
+import java.util.Set;
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -41,13 +42,15 @@
 import org.springframework.data.mongodb.repository.Person;
 import org.springframework.data.mongodb.repository.ReadPreference;
 import org.springframework.data.mongodb.repository.query.MongoEntityInformation;
+import org.springframework.data.repository.ListCrudRepository;
 import org.springframework.data.repository.Repository;
 
 /**
  * Unit test for {@link MongoRepositoryFactory}.
  *
  * @author Oliver Gierke
  * @author Mark Paluch
+ * @author Christoph Strobl
  */
 @ExtendWith(MockitoExtension.class)
 @MockitoSettings(strictness = Strictness.LENIENT)
@@ -92,7 +95,21 @@ void considersCrudMethodMetadata() {
 		assertThat(value.getReadPreference()).isEqualTo(com.mongodb.ReadPreference.secondary());
 	}
 
-	interface MyPersonRepository extends Repository<Person, Long> {
+	@Test // GH-2971
+	void ignoresCrudMethodMetadataOnNonAnnotatedMethods() {
+
+		MongoRepositoryFactory factory = new MongoRepositoryFactory(template);
+		MyPersonRepository repository = factory.getRepository(MyPersonRepository.class);
+		repository.findAllById(Set.of(42L));
+
+		ArgumentCaptor<Query> captor = ArgumentCaptor.forClass(Query.class);
+		verify(template).find(captor.capture(), eq(Person.class), eq("person"));
+
+		Query value = captor.getValue();
+		assertThat(value.getReadPreference()).isNull();
+	}
+
+	interface MyPersonRepository extends ListCrudRepository<Person, Long> {
 
 		@ReadPreference("secondary")
 		Optional<Person> findById(Long id);

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/support/ReactiveMongoRepositoryFactoryUnitTests.java

@@ -18,6 +18,10 @@
 import static org.assertj.core.api.Assertions.*;
 import static org.mockito.Mockito.*;
 
+import java.util.Set;
+
+import org.springframework.data.repository.reactive.ReactiveCrudRepository;
+import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
 import org.junit.jupiter.api.BeforeEach;
@@ -72,7 +76,23 @@ void considersCrudMethodMetadata() {
 		assertThat(value.getReadPreference()).isEqualTo(com.mongodb.ReadPreference.secondary());
 	}
 
-	interface MyPersonRepository extends Repository<Person, Long> {
+	@Test // GH-2971
+	void ignoresCrudMethodMetadataOnNonAnnotatedMethods() {
+
+		when(template.find(any(), any(), anyString())).thenReturn(Flux.empty());
+
+		ReactiveMongoRepositoryFactory factory = new ReactiveMongoRepositoryFactory(template);
+		MyPersonRepository repository = factory.getRepository(MyPersonRepository.class);
+		repository.findAllById(Set.of(42L));
+
+		ArgumentCaptor<Query> captor = ArgumentCaptor.forClass(Query.class);
+		verify(template).find(captor.capture(), eq(Person.class), eq("person"));
+
+		Query value = captor.getValue();
+		assertThat(value.getReadPreference()).isNull();
+	}
+
+	interface MyPersonRepository extends ReactiveCrudRepository<Person, Long> {
 
 		@ReadPreference("secondary")
 		Mono<Person> findById(Long id);

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/support/SimpleReactiveMongoRepositoryUnitTests.java

@@ -161,11 +161,6 @@ void shouldAddReadPreferenceToFindAllMethods(
 			public Optional<com.mongodb.ReadPreference> getReadPreference() {
 				return Optional.of(com.mongodb.ReadPreference.secondaryPreferred());
 			}
-
-			@Override
-			public Method getMethod() {
-				return null;
-			}
 		});
 		when(mongoOperations.find(any(), any(), any())).thenReturn(Flux.just("ok"));
 
@@ -186,11 +181,6 @@ void shouldAddReadPreferenceToFindOne() {
 			public Optional<com.mongodb.ReadPreference> getReadPreference() {
 				return Optional.of(com.mongodb.ReadPreference.secondaryPreferred());
 			}
-
-			@Override
-			public Method getMethod() {
-				return null;
-			}
 		});
 		when(mongoOperations.find(any(), any(), any())).thenReturn(Flux.just("ok"));
 
@@ -218,11 +208,6 @@ void shouldAddReadPreferenceToFluentFetchable() {
 			public Optional<com.mongodb.ReadPreference> getReadPreference() {
 				return Optional.of(com.mongodb.ReadPreference.secondaryPreferred());
 			}
-
-			@Override
-			public Method getMethod() {
-				return null;
-			}
 		});
 
 		repository.findBy(Example.of(new TestDummy()), FluentQuery.ReactiveFluentQuery::all).subscribe();