org.opencastproject.util.ReflectionUtil Maven / Gradle / Ivy
/*
* Licensed to The Apereo Foundation under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional
* information regarding copyright ownership.
*
*
* The Apereo Foundation licenses this file to you under the Educational
* Community 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://opensource.org/licenses/ecl2.txt
*
* 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.opencastproject.util;
import static org.opencastproject.util.data.functions.Misc.chuck;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
/** Reflection utils. */
public final class ReflectionUtil {
private ReflectionUtil() {
}
/**
* Simple helper to avoid unnecessary return null; statements when using {@link #run(Object)},
* {@link #run(Class, Object)}.
* Just wrap your expression like this return call(expr).
*/
public static A call(Object expression) {
return null;
}
/**
* Call all parameterless methods of c on object o.
*
* Does not call any bridge, synthetic or native methods and also no methods declared in Object.
*/
public static void run(Class c, B o) {
runInternal(c.getMethods(), o);
}
/**
* Call all parameterless methods of object a.
*
* Does not call any bridge, synthetic or native methods and also no methods declared in Object.
*/
public static void run(A a) {
runInternal(a.getClass().getMethods(), a);
}
private static void runInternal(Method[] ms, A a) {
try {
for (Method m : ms) {
if (m.getParameterTypes().length == 0
&& !m.getDeclaringClass().equals(Object.class)
&& !m.isBridge() && !m.isSynthetic()
&& !Modifier.isNative(m.getModifiers())) {
m.invoke(a);
}
}
} catch (Exception e) {
chuck(e);
}
}
}