Mega Code Archive
Find a Method on the supplied class with the supplied name and parameter types
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/*
* Copyright 2002-2008 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.
*/
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
/**
* Simple utility class for working with the reflection API and handling
* reflection exceptions.
*
* <p>Only intended for internal use.
*
* @author Juergen Hoeller
* @author Rob Harrop
* @author Rod Johnson
* @author Costin Leau
* @since 1.2.2
*/
public abstract class ReflectionUtils {
/**
* Attempt to find a {@link Method} on the supplied class with the supplied name
* and no parameters. Searches all superclasses up to <code>Object</code>.
* <p>Returns <code>null</code> if no {@link Method} can be found.
* @param clazz the class to introspect
* @param name the name of the method
* @return the Method object, or <code>null</code> if none found
*/
public static Method findMethod(Class clazz, String name) {
return findMethod(clazz, name, new Class[0]);
}
/**
* Attempt to find a {@link Method} on the supplied class with the supplied name
* and parameter types. Searches all superclasses up to <code>Object</code>.
* <p>Returns <code>null</code> if no {@link Method} can be found.
* @param clazz the class to introspect
* @param name the name of the method
* @param paramTypes the parameter types of the method
* @return the Method object, or <code>null</code> if none found
*/
public static Method findMethod(Class clazz, String name, Class[] paramTypes) {
Class searchType = clazz;
while (!Object.class.equals(searchType) && searchType != null) {
Method[] methods = (searchType.isInterface() ? searchType.getMethods() : searchType.getDeclaredMethods());
for (int i = 0; i < methods.length; i++) {
Method method = methods[i];
if (name.equals(method.getName()) && Arrays.equals(paramTypes, method.getParameterTypes())) {
return method;
}
}
searchType = searchType.getSuperclass();
}
return null;
}
}
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