Adapter for JDK 8's standard parameter name reflection facilities

Issue: SPR-9643

spring-core/src/main/java/org/springframework/core/StandardReflectionParameterNameDiscoverer.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2002-2013 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.core;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Method;
+import java.lang.reflect.Parameter;
+
+/**
+ * {@link ParameterNameDiscoverer} implementation which uses JDK 8's
+ * reflection facilities for introspecting parameter names.
+ *
+ * @author Juergen Hoeller
+ * @since 4.0
+ * @see java.lang.reflect.Parameter#getName()
+ */
+public class StandardReflectionParameterNameDiscoverer implements ParameterNameDiscoverer {
+
+	public String[] getParameterNames(Method method) {
+		Parameter[] parameters = method.getParameters();
+		String[] parameterNames = new String[parameters.length];
+		for (int i = 0; i < parameters.length; i++) {
+			parameterNames[i] = parameters[i].getName();
+		}
+		return parameterNames;
+	}
+
+	public String[] getParameterNames(Constructor<?> ctor) {
+		Parameter[] parameters = ctor.getParameters();
+		String[] parameterNames = new String[parameters.length];
+		for (int i = 0; i < parameters.length; i++) {
+			parameterNames[i] = parameters[i].getName();
+		}
+		return parameterNames;
+	}
+
+}