Add naming strategy for @MVC request mappings.

This change adds a strategy for assigning a default name to an
@RequestMapping controller method. The @RequestMapping annotation
itself now has a name attribute allowing the explicit assignment
of a mapping name.

This is mainly intended for use in EL expressions in views. The
RequestContext class now provides a getMvcUrl method that internally
delegates to MvcUriComponents to look up the handler method.

See the Javadoc of MvcUriComponents.fromMappingName.

Issue: SPR-5779

spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/RequestMappingInfoHandlerMethodMappingNamingStrategyTests.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2002-2014 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.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.web.servlet.mvc.method;
+
+import org.junit.Test;
+import org.springframework.util.ClassUtils;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.method.HandlerMethod;
+import org.springframework.web.servlet.handler.HandlerMethodMappingNamingStrategy;
+
+import java.lang.reflect.Method;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Unit tests for
+ * {@link org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMethodMappingNamingStrategy}.
+ *
+ * @author Rossen Stoyanchev
+ */
+public class RequestMappingInfoHandlerMethodMappingNamingStrategyTests {
+
+
+	@Test
+	public void getNameExplicit() {
+
+		Method method = ClassUtils.getMethod(TestController.class, "handle");
+		HandlerMethod handlerMethod = new HandlerMethod(new TestController(), method);
+
+		RequestMappingInfo rmi = new RequestMappingInfo("foo", null, null, null, null, null, null, null);
+
+		HandlerMethodMappingNamingStrategy strategy = new RequestMappingInfoHandlerMethodMappingNamingStrategy();
+
+		assertEquals("foo", strategy.getName(handlerMethod, rmi));
+	}
+
+	@Test
+	public void getNameConvention() {
+
+		Method method = ClassUtils.getMethod(TestController.class, "handle");
+		HandlerMethod handlerMethod = new HandlerMethod(new TestController(), method);
+
+		RequestMappingInfo rmi = new RequestMappingInfo(null, null, null, null, null, null, null, null);
+
+		HandlerMethodMappingNamingStrategy strategy = new RequestMappingInfoHandlerMethodMappingNamingStrategy();
+
+		assertEquals("TC#handle", strategy.getName(handlerMethod, rmi));
+	}
+
+
+	private static class TestController {
+
+		@RequestMapping
+		public void handle() {
+		}
+	}
+
+}