Consider Tuples in Keyset extraction.

We now consider Tuple values when the query uses tuples for e.g. interface projections when extracting keyset values.

Closes #3077

spring-data-jpa/src/main/java/org/springframework/data/jpa/repository/support/JpaMetamodelEntityInformation.java

@@ -17,6 +17,7 @@
 
 import jakarta.persistence.IdClass;
 import jakarta.persistence.PersistenceUnitUtil;
+import jakarta.persistence.Tuple;
 import jakarta.persistence.metamodel.Attribute;
 import jakarta.persistence.metamodel.EntityType;
 import jakarta.persistence.metamodel.IdentifiableType;
@@ -34,6 +35,7 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
+import java.util.function.Function;
 
 import org.springframework.beans.BeanWrapper;
 import org.springframework.core.annotation.AnnotationUtils;
@@ -154,6 +156,11 @@ public ID getId(T entity) {
 
 		// If it's a simple type, then immediately delegate to the provider
 		if (idMetadata.hasSimpleId()) {
+
+			if (entity instanceof Tuple t) {
+				return (ID) t.get(idMetadata.getSimpleIdAttribute().getName());
+			}
+
 			return (ID) persistenceUnitUtil.getIdentifier(entity);
 		}
 
@@ -225,27 +232,38 @@ public boolean isNew(T entity) {
 	@Override
 	public Map<String, Object> getKeyset(Iterable<String> propertyPaths, T entity) {
 
-		// TODO: Proxy handling requires more elaborate refactoring, see
-		// https://github.com/spring-projects/spring-data-jpa/issues/2784
-		BeanWrapper entityWrapper = new DirectFieldAccessFallbackBeanWrapper(entity);
+		Function<String, Object> getter = getPropertyValueFunction(entity);
 
 		Map<String, Object> keyset = new LinkedHashMap<>();
 
 		if (hasCompositeId()) {
 			for (String idAttributeName : getIdAttributeNames()) {
-				keyset.put(idAttributeName, entityWrapper.getPropertyValue(idAttributeName));
+				keyset.put(idAttributeName, getter.apply(idAttributeName));
 			}
 		} else {
 			keyset.put(getIdAttribute().getName(), getId(entity));
 		}
 
 		for (String propertyPath : propertyPaths) {
-			keyset.put(propertyPath, entityWrapper.getPropertyValue(propertyPath));
+			keyset.put(propertyPath, getter.apply(propertyPath));
 		}
 
 		return keyset;
 	}
 
+	private Function<String, Object> getPropertyValueFunction(Object entity) {
+
+		if (entity instanceof Tuple t) {
+			return t::get;
+		}
+
+		// TODO: Proxy handling requires more elaborate refactoring, see
+		// https://github.com/spring-projects/spring-data-jpa/issues/2784
+		BeanWrapper entityWrapper = new DirectFieldAccessFallbackBeanWrapper(entity);
+
+		return entityWrapper::getPropertyValue;
+	}
+
 	/**
 	 * Simple value object to encapsulate id specific metadata.
 	 *

spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/UserRepositoryFinderTests.java

@@ -32,14 +32,17 @@
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.ScrollPosition;
 import org.springframework.data.domain.Slice;
 import org.springframework.data.domain.Sort;
+import org.springframework.data.domain.Window;
 import org.springframework.data.jpa.domain.sample.Role;
 import org.springframework.data.jpa.domain.sample.User;
 import org.springframework.data.jpa.provider.PersistenceProvider;
 import org.springframework.data.jpa.repository.sample.RoleRepository;
 import org.springframework.data.jpa.repository.sample.UserRepository;
 import org.springframework.data.jpa.repository.sample.UserRepository.IdOnly;
+import org.springframework.data.jpa.repository.sample.UserRepository.NameOnly;
 import org.springframework.data.jpa.repository.sample.UserRepository.RolesAndFirstname;
 import org.springframework.data.repository.query.QueryLookupStrategy;
 import org.springframework.test.context.ContextConfiguration;
@@ -221,6 +224,19 @@ void executesQueryToSliceWithUnpaged() {
 		assertThat(slice.hasNext()).isFalse();
 	}
 
+	@Test // GH-3077
+	void shouldProjectWithKeysetScrolling() {
+
+		Window<NameOnly> first = userRepository.findTop1ByLastnameOrderByFirstname(ScrollPosition.keyset(), //
+				"Matthews");
+
+		Window<NameOnly> next = userRepository.findTop1ByLastnameOrderByFirstname(first.positionAt(0), //
+				"Matthews");
+
+		assertThat(first.getContent()).extracting(NameOnly::getFirstname).containsOnly(dave.getFirstname());
+		assertThat(next.getContent()).extracting(NameOnly::getFirstname).containsOnly(oliver.getFirstname());
+	}
+
 	@Test // DATAJPA-830
 	void executesMethodWithNotContainingOnStringCorrectly() {
 

spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/sample/UserRepository.java

@@ -226,6 +226,8 @@ Window<User> findTop3ByFirstnameStartingWithOrderByFirstnameAscEmailAddressAsc(S
 
 	Page<User> findByLastnameIgnoringCase(Pageable pageable, String lastname);
 
+	Window<NameOnly> findTop1ByLastnameOrderByFirstname(ScrollPosition scrollPosition, String lastname);
+
 	List<User> findByLastnameIgnoringCaseLike(String lastname);
 
 	List<User> findByLastnameAndFirstnameAllIgnoringCase(String lastname, String firstname);