org.firebirdsql.ds.ReflectionHelper Maven / Gradle / Ivy
/*
* $Id$
*
* Firebird Open Source J2EE Connector - JDBC Driver
*
* Distributable under LGPL license.
* You may obtain a copy of the License at http://www.gnu.org/copyleft/lgpl.html
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* LGPL License for more details.
*
* This file was created by members of the firebird development team.
* All individual contributions remain the Copyright (C) of those
* individuals. Contributors to this file are either listed here or
* can be obtained from a CVS history command.
*
* All rights reserved.
*/
package org.firebirdsql.ds;
import java.lang.reflect.Method;
import java.util.HashSet;
import java.util.Set;
/**
* Class containing static helper methods for reflective access.
*
* @author Mark Rotteveel
* @since 2.2
*/
public final class ReflectionHelper {
private ReflectionHelper() {}
/**
* Get all implemented interfaces by the class.
*
* @param clazz class to inspect.
*
* @return array of all implemented interfaces.
*/
public static Class[] getAllInterfaces(Class clazz) {
Set result = new HashSet();
do {
Class[] interfaces = clazz.getInterfaces();
for (int i = 0; i < interfaces.length; i++) {
result.add(interfaces[i]);
}
clazz = clazz.getSuperclass();
} while(clazz.getSuperclass() != null);
return (Class[])result.toArray(new Class[result.size()]);
}
/**
* Helper function to find specified method in a specified class.
*
* @param clazz
* class in which we look for a specified method.
* @param name
* name of the method.
* @param args
* types of method params.
*
* @return instance of {@link Method} corresponding to specified name and
* param types.
*/
public static Method findMethod(Class clazz, String name, Class[] args) {
try {
return clazz.getMethod(name, args);
} catch (NoSuchMethodException nmex) {
return null;
}
}
}