#46 - AnnotationMappingDiscoverer now deals with missing method mapping.

If a method level @RequestMapping is not carrying a value we now fall back to the type level mapping as Spring MVC does. Before the fix, providing no mapping lead to an ArrayIndexOutOfBoundsException.

src/main/java/org/springframework/hateoas/core/AnnotationMappingDiscoverer.java

@@ -88,6 +88,11 @@ public class AnnotationMappingDiscoverer implements MappingDiscoverer {
 		}
 
 		String typeMapping = getMapping(method.getDeclaringClass());
+
+		if (mapping == null || mapping.length == 0) {
+			return typeMapping;
+		}
+
 		return typeMapping == null ? mapping[0] : typeMapping + mapping[0];
 	}
 

src/test/java/org/springframework/hateoas/core/AnnotationMappingDiscovererUnitTest.java

@@ -60,11 +60,24 @@ public class AnnotationMappingDiscovererUnitTest {
 		assertThat(discoverer.getMapping(method), is("/method"));
 	}
 
+	/**
+	 * @see #46
+	 */
+	@Test
+	public void treatsMissingMethodMappingAsEmptyMapping() throws Exception {
+
+		Method method = MyController.class.getMethod("noMethodMapping");
+		assertThat(discoverer.getMapping(method), is("/type"));
+	}
+
 	@RequestMapping("/type")
 	interface MyController {
 
 		@RequestMapping("/method")
 		void method();
+
+		@RequestMapping
+		void noMethodMapping();
 	}
 
 	interface ControllerWithoutTypeLevelMapping {