ClassLoaderUtil.java

/*
 * Copyright (c) 1986-2015, Serkan OZAL, All Rights Reserved.
 *
 * 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 tr.com.serkanozal.jillegal.agent.util;

/**
 * Utility class for some common classloader related operations.
 * 
 * @author Serkan OZAL
 */
public final class ClassLoaderUtil {   
	
	private ClassLoaderUtil() {
		
	}
	
	/**
	 * Gets an available classloader which can be 
	 * classloader of this class or system classloader.
	 * 
	 * @return an available classloader to be used
	 */
	public static ClassLoader getClassLoader() {
		ClassLoader classLoader = ClassLoaderUtil.class.getClassLoader();
    	if (classLoader == null) {
    		return ClassLoader.getSystemClassLoader();
    	}
    	else {
    		return classLoader;
    	}
	}
	
	/**
	 * Tries to load class with given <code>className</code>.
	 * 
	 * @param className name of the class to be loaded
	 * @return the loaded class if the class could be found with given <code>className</code>, 
	 *         otherwise <code>null</code>
	 */
	public static Class<?> loadClass(String className) {
		try {
			return getClassLoader().loadClass(className);
		}
		catch (Throwable t) {
			LogUtil.error("Error at ClassLoaderUtil.loadClass(String className)", t);
			return null;
		}
	}
	
}