#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];
 	}