/*
* Copyright 2012 Google Inc.
*
* 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 com.yixia.zi.utils;
import java.lang.reflect.InvocationTargetException;
/**
* A set of helper methods for best-effort method calls via reflection.
*/
public class ReflectionUtils {
public static Object tryInvoke(Object target, String methodName, Object... args) {
Class<?>[] argTypes = new Class<?>[args.length];
for (int i = 0; i < args.length; i++) {
argTypes[i] = args[i].getClass();
}
return tryInvoke(target, methodName, argTypes, args);
}
public static Object tryInvoke(Object target, String methodName, Class<?>[] argTypes,
Object... args) {
try {
return target.getClass().getMethod(methodName, argTypes).invoke(target, args);
} catch (NoSuchMethodException ignored) {
} catch (IllegalAccessException ignored) {
} catch (InvocationTargetException ignored) {
}
return null;
}
@SuppressWarnings("unchecked")
public static <E> E callWithDefault(Object target, String methodName, E defaultValue) {
try {
//noinspection unchecked
return (E) target.getClass().getMethod(methodName, (Class[]) null).invoke(target);
} catch (NoSuchMethodException ignored) {
} catch (IllegalAccessException ignored) {
} catch (InvocationTargetException ignored) {
}
return defaultValue;
}
}