01: /*
02: * Copyright 2002-2006 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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</code> 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</code> if they cannot
42: */
43: String[] getParameterNames(Method method);
44:
45: /**
46: * Return parameter names for this constructor,
47: * or <code>null</code> 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</code> if they cannot
51: */
52: String[] getParameterNames(Constructor ctor);
53:
54: }
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