/* * Copyright 2002-2012 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; /** * Interface to discover parameter names for methods and constructors. * *
Parameter name discovery is not always possible, but various strategies are
* available to try, such as looking for debug information that may have been
* emitted at compile time, and looking for argname annotation values optionally
* accompanying AspectJ annotated methods.
*
* @author Rod Johnson
* @author Adrian Colyer
* @since 2.0
*/
public interface ParameterNameDiscoverer {
/**
* Return parameter names for this method,
* or null
if they cannot be determined.
* @param method method to find parameter names for
* @return an array of parameter names if the names can be resolved,
* or null
if they cannot
*/
String[] getParameterNames(Method method);
/**
* Return parameter names for this constructor,
* or null
if they cannot be determined.
* @param ctor constructor to find parameter names for
* @return an array of parameter names if the names can be resolved,
* or null
if they cannot
*/
String[] getParameterNames(Constructor> ctor);
}