DATACMNS-850 - ReturnedClass now does not consider core Java types DTOs.

We now completely ignore all core Java types (i.e. types with a package name starting with "java.") from being DTOs. This allows query methods to project on date time types, too.

Author: odrotbohm

src/main/java/org/springframework/data/repository/query/ReturnedType.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 the original author or authors.
+ * Copyright 2015-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -304,7 +304,7 @@ private boolean isDto() {
 					!isPrimitiveOrWrapper() && //
 					!Number.class.isAssignableFrom(type) && //
 					!VOID_TYPES.contains(type) && //
-					!type.getPackage().getName().startsWith("java.lang");
+					!type.getPackage().getName().startsWith("java.");
 		}
 
 		private boolean isDomainSubtype() {

src/test/java/org/springframework/data/repository/query/ReturnedTypeUnitTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 the original author or authors.
+ * Copyright 2015-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@
 
 import java.lang.reflect.Method;
 import java.math.BigInteger;
+import java.time.LocalDateTime;
 import java.util.List;
 
 import org.junit.Test;
@@ -154,6 +155,18 @@ public void doesNotConsiderAnEnumProjecting() throws Exception {
 		assertThat(type.isProjecting(), is(false));
 	}
 
+	/**
+	 * @see DATACMNS-850
+	 */
+	@Test
+	public void considersAllJavaTypesAsNotProjecting() throws Exception {
+
+		ReturnedType type = getReturnedType("timeQuery");
+
+		assertThat(type.needsCustomConstruction(), is(false));
+		assertThat(type.isProjecting(), is(false));
+	}
+
 	private static ReturnedType getReturnedType(String methodName, Class<?>... parameters) throws Exception {
 		return getQueryMethod(methodName, parameters).getResultProcessor().getReturnedType();
 	}
@@ -191,6 +204,8 @@ interface SampleRepository extends Repository<Sample, Long> {
 
 		MyEnum findEnum();
 
+		LocalDateTime timeQuery();
+
 		static enum MyEnum {
 			VALUE
 		}