Reflections.java

/*
 * The MIT License
 *
 * Copyright (c) 2013 Chris Frohoff
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package jenkins.security.security218.ysoserial.util;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;

public class Reflections {

	public static Field getField(final Class<?> clazz, final String fieldName) throws Exception {
		Field field = clazz.getDeclaredField(fieldName);
		if (field == null && clazz.getSuperclass() != null) {
			field = getField(clazz.getSuperclass(), fieldName);
		}
		field.setAccessible(true);
		return field;
	}

	public static void setFieldValue(final Object obj, final String fieldName, final Object value) throws Exception {
		final Field field = getField(obj.getClass(), fieldName);
		field.set(obj, value);
	}

	public static Object getFieldValue(final Object obj, final String fieldName) throws Exception {
		final Field field = getField(obj.getClass(), fieldName);		
		return field.get(obj);
	}

	public static Constructor<?> getFirstCtor(final String name) throws Exception {
		final Constructor<?> ctor = Class.forName(name).getDeclaredConstructors()[0];
	    ctor.setAccessible(true);
	    return ctor;
	}

}