Define repository base class name in JDBC config extension.

Closes #2137

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/repository/config/JdbcRepositoryConfigExtension.java

@@ -36,6 +36,7 @@ import org.springframework.data.jdbc.core.dialect.JdbcDialect;
 import org.springframework.data.jdbc.core.mapping.JdbcMappingContext;
 import org.springframework.data.jdbc.repository.aot.JdbcRepositoryContributor;
 import org.springframework.data.jdbc.repository.support.JdbcRepositoryFactoryBean;
+import org.springframework.data.jdbc.repository.support.SimpleJdbcRepository;
 import org.springframework.data.relational.core.dialect.Dialect;
 import org.springframework.data.relational.core.mapping.DefaultNamingStrategy;
 import org.springframework.data.relational.core.mapping.NamingStrategy;
@@ -68,6 +69,11 @@ public class JdbcRepositoryConfigExtension extends RepositoryConfigurationExtens
 		return "JDBC";
 	}
 
+	@Override
+	public String getRepositoryBaseClassName() {
+		return SimpleJdbcRepository.class.getName();
+	}
+
 	@Override
 	public String getRepositoryFactoryBeanClassName() {
 		return JdbcRepositoryFactoryBean.class.getName();

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/repository/config/JdbcRepositoryConfigExtensionUnitTests.java

@@ -27,6 +27,7 @@ import org.springframework.core.env.StandardEnvironment;
 import org.springframework.core.io.ResourceLoader;
 import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
 import org.springframework.core.type.AnnotationMetadata;
+import org.springframework.data.jdbc.repository.support.SimpleJdbcRepository;
 import org.springframework.data.relational.core.mapping.Table;
 import org.springframework.data.repository.Repository;
 import org.springframework.data.repository.config.AnnotationRepositoryConfigurationSource;
@@ -49,7 +50,7 @@ public class JdbcRepositoryConfigExtensionUnitTests {
 			EnableJdbcRepositories.class, loader, environment, registry, null);
 
 	@Test // DATAJPA-437
-	public void isStrictMatchOnlyIfDomainTypeIsAnnotatedWithDocument() {
+	void isStrictMatchOnlyIfDomainTypeIsAnnotatedWithDocument() {
 
 		JdbcRepositoryConfigExtension extension = new JdbcRepositoryConfigExtension();
 
@@ -60,6 +61,14 @@ public class JdbcRepositoryConfigExtensionUnitTests {
 				.containsExactly(SampleRepository.class.getName());
 	}
 
+	@Test // GH-2137
+	void reportsBaseClass() {
+
+		JdbcRepositoryConfigExtension extension = new JdbcRepositoryConfigExtension();
+
+		assertThat(extension.getRepositoryBaseClassName()).isEqualTo(SimpleJdbcRepository.class.getName());
+	}
+
 	@EnableJdbcRepositories(considerNestedRepositories = true)
 	static class Config {