1 /*
2 * Copyright 2002-2012 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package org.springframework.core;
18
19 import java.lang.reflect.Constructor;
20 import java.lang.reflect.Method;
21
22 /**
23 * Interface to discover parameter names for methods and constructors.
24 *
25 * <p>Parameter name discovery is not always possible, but various strategies are
26 * available to try, such as looking for debug information that may have been
27 * emitted at compile time, and looking for argname annotation values optionally
28 * accompanying AspectJ annotated methods.
29 *
30 * @author Rod Johnson
31 * @author Adrian Colyer
32 * @since 2.0
33 */
34 public interface ParameterNameDiscoverer {
35
36 /**
37 * Return parameter names for this method,
38 * or {@code null} if they cannot be determined.
39 * @param method method to find parameter names for
40 * @return an array of parameter names if the names can be resolved,
41 * or {@code null} if they cannot
42 */
43 String[] getParameterNames(Method method);
44
45 /**
46 * Return parameter names for this constructor,
47 * or {@code null} if they cannot be determined.
48 * @param ctor constructor to find parameter names for
49 * @return an array of parameter names if the names can be resolved,
50 * or {@code null} if they cannot
51 */
52 String[] getParameterNames(Constructor<?> ctor);
53
54 }