PortalClassLoaderUtil.java

/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.kernel.util;

import com.liferay.portal.kernel.security.pacl.permission.PortalRuntimePermission;

import java.net.URL;
import java.net.URLClassLoader;

/**
 * @author Brian Wing Shun Chan
 */
public class PortalClassLoaderUtil {

	public static ClassLoader getClassLoader() {
		PortalRuntimePermission.checkGetClassLoader("portal");

		return _classLoader;
	}

	public static boolean isPortalClassLoader(ClassLoader classLoader) {
		if ((classLoader == _classLoader) ||
			(classLoader == _classLoader.getParent())) {

			return true;
		}

		return false;
	}

	public static void setClassLoader(ClassLoader classLoader) {
		PortalRuntimePermission.checkSetBeanProperty(
			PortalClassLoaderUtil.class);

		if (classLoader == null) {
			_classLoader = null;

			return;
		}

		Class<?> clazz = classLoader.getClass();

		try {
			clazz.getMethod("destroy");

			_classLoader = new URLClassLoader(new URL[0], classLoader);
		}
		catch (NoSuchMethodException nsme) {
			_classLoader = classLoader;
		}
	}

	private static ClassLoader _classLoader;

}