#1974 - Improve default LinkRelationProvider setup to also consider @Relation.

RepositoryRestConfiguration now defaults the LinkRelationProvider instance to a delegating one considering both AnnotationLinkRelationProvider and EvoLinkRelationProvider so that @Relation annotations on entity types.

spring-data-rest-core/src/test/java/org/springframework/data/rest/core/RepositoryRestConfigurationUnitTests.java

@@ -29,6 +29,8 @@ import org.springframework.data.rest.core.config.RepositoryCorsRegistry;
 import org.springframework.data.rest.core.config.RepositoryRestConfiguration;
 import org.springframework.data.rest.core.domain.Profile;
 import org.springframework.data.rest.core.domain.ProfileRepository;
+import org.springframework.hateoas.LinkRelation;
+import org.springframework.hateoas.server.core.Relation;
 import org.springframework.http.MediaType;
 import org.springframework.web.cors.CorsConfiguration;
 
@@ -136,4 +138,15 @@ public class RepositoryRestConfigurationUnitTests {
 	public void rejectsNullRelProvider() {
 		assertThatExceptionOfType(IllegalArgumentException.class).isThrownBy(() -> configuration.setRelProvider(null));
 	}
+
+	@Test // #1974
+	public void considersAtRelationOnTypesByDefault() {
+		assertThat(configuration.getRelProvider().getItemResourceRelFor(Sample.class))
+				.isEqualTo(LinkRelation.of("something"));
+	}
+
+	@Relation("something")
+	static class Sample {
+
+	}
 }