/*
* Copyright 2013 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.
*/
package org.springframework.yarn.integration;
import java.lang.reflect.Field;
/**
* Testing utilities.
*
* @author Janne Valkealahti
*
*/
public abstract class TestUtils {
@SuppressWarnings("unchecked")
public static <T> T readField(String name, Object target) throws Exception {
Field field = null;
Class<?> clazz = target.getClass();
do {
try {
field = clazz.getDeclaredField(name);
} catch (Exception ex) {
}
clazz = clazz.getSuperclass();
} while (field == null && !clazz.equals(Object.class));
if (field == null)
throw new IllegalArgumentException("Cannot find field '" + name + "' in the class hierarchy of "
+ target.getClass());
field.setAccessible(true);
return (T) field.get(target);
}
}