/***
* Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
* All rights reserved.
*
* 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 br.com.caelum.vraptor.http;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import br.com.caelum.vraptor.interceptor.TypeNameExtractor;
public class DefaultParameterNameProvider implements ParameterNameProvider{
private final TypeNameExtractor extractor;
public DefaultParameterNameProvider(TypeNameExtractor extractor) {
this.extractor = extractor;
}
public String[] parameterNamesFor(AccessibleObject method) {
Type[] parameterTypes = parameterTypes(method);
String[] names = new String[parameterTypes.length];
for (int i = 0; i < names.length; i++) {
names[i] = extractor.nameFor(parameterTypes[i]);
}
return names;
}
@SuppressWarnings({ "rawtypes" })
private static Type[] parameterTypes(AccessibleObject methodOrConstructor) {
if (methodOrConstructor instanceof Method) {
return ((Method)methodOrConstructor).getGenericParameterTypes();
} else if (methodOrConstructor instanceof Constructor<?>) {
return ((Constructor)methodOrConstructor).getGenericParameterTypes();
} else {
throw new IllegalArgumentException("Expecting a method or constructor, " +
"instead got " + methodOrConstructor);
}
}
}