DATAREST-1121 - Skip last modified detection for query methods that project.

For an execution of a projecting query method we now skip the last modified detection as it actually doesn't make sense if applied to non-aggregates.

spring-data-rest-webmvc/src/test/java/org/springframework/data/rest/webmvc/ResourceStatusUnitTests.java

@@ -21,10 +21,13 @@ import static org.mockito.Mockito.*;
 
 import lombok.Value;
 
+import java.util.Date;
 import java.util.function.Supplier;
 
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.ExpectedException;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.junit.MockitoJUnitRunner;
@@ -49,6 +52,8 @@ public class ResourceStatusUnitTests {
 	@Mock HttpHeadersPreparer preparer;
 	@Mock Supplier<PersistentEntityResource> supplier;
 
+	public @Rule ExpectedException exception = ExpectedException.none();
+
 	@Before
 	public void setUp() {
 
@@ -87,6 +92,15 @@ public class ResourceStatusUnitTests {
 		assertNotModified(status.getStatusAndHeaders(new HttpHeaders(), new Sample(0), entity));
 	}
 
+	@Test // DATAREST-1121
+	public void rejectsInvalidPersistentEntityDomainObjectCombination() {
+
+		exception.expect(IllegalArgumentException.class);
+		exception.expectMessage(entity.getType().getName());
+
+		assertModified(status.getStatusAndHeaders(new HttpHeaders(), new Date(), entity));
+	}
+
 	private void assertModified(StatusAndHeaders statusAndHeaders) {
 
 		assertThat(statusAndHeaders.isModified()).isTrue();