Add protected method to AbstractHandlerMethodMapping

spring-webmvc/src/main/java/org/springframework/web/servlet/handler/AbstractHandlerMethodMapping.java

@@ -165,25 +165,17 @@ public boolean matches(Method method) {
 	 * under the same mapping
 	 */
 	protected void registerHandlerMethod(Object handler, Method method, T mapping) {
-		HandlerMethod handlerMethod;
-		if (handler instanceof String) {
-			String beanName = (String) handler;
-			handlerMethod = new HandlerMethod(beanName, getApplicationContext(), method);
-		}
-		else {
-			handlerMethod = new HandlerMethod(handler, method);
-		}
-
+		HandlerMethod newHandlerMethod = createHandlerMethod(handler, method);
 		HandlerMethod oldHandlerMethod = handlerMethods.get(mapping);
-		if (oldHandlerMethod != null && !oldHandlerMethod.equals(handlerMethod)) {
-			throw new IllegalStateException("Ambiguous mapping found. Cannot map '" + handlerMethod.getBean()
-					+ "' bean method \n" + handlerMethod + "\nto " + mapping + ": There is already '"
+		if (oldHandlerMethod != null && !oldHandlerMethod.equals(newHandlerMethod)) {
+			throw new IllegalStateException("Ambiguous mapping found. Cannot map '" + newHandlerMethod.getBean()
+					+ "' bean method \n" + newHandlerMethod + "\nto " + mapping + ": There is already '"
 					+ oldHandlerMethod.getBean() + "' bean method\n" + oldHandlerMethod + " mapped.");
 		}
 
-		this.handlerMethods.put(mapping, handlerMethod);
+		this.handlerMethods.put(mapping, newHandlerMethod);
 		if (logger.isInfoEnabled()) {
-			logger.info("Mapped \"" + mapping + "\" onto " + handlerMethod);
+			logger.info("Mapped \"" + mapping + "\" onto " + newHandlerMethod);
 		}
 
 		Set<String> patterns = getMappingPathPatterns(mapping);
@@ -194,6 +186,24 @@ protected void registerHandlerMethod(Object handler, Method method, T mapping) {
 		}
 	}
 
+	/**
+	 * Create the HandlerMethod instance.
+	 * @param handler either a bean name or an actual handler instance
+	 * @param method the target method
+	 * @return the created HandlerMethod
+	 */
+	protected HandlerMethod createHandlerMethod(Object handler, Method method) {
+		HandlerMethod handlerMethod;
+		if (handler instanceof String) {
+			String beanName = (String) handler;
+			handlerMethod = new HandlerMethod(beanName, getApplicationContext(), method);
+		}
+		else {
+			handlerMethod = new HandlerMethod(handler, method);
+		}
+		return handlerMethod;
+	}
+
 	/**
 	 * Extract and return the URL paths contained in a mapping.
 	 */