/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2008, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This 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 software 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.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.apache.tomcat.vault.security.vault;

import java.security.AccessController;
import java.security.PrivilegedAction;

/**
 * Privileged Blocks
 *
 * @author Anil.Saldhana@redhat.com
 * @since Aug 12, 2011
 */
class SecurityActions {
    static Class<?> loadClass(final Class<?> clazz, final String fqn) {
        return AccessController.doPrivileged(new PrivilegedAction<Class<?>>() {
            public Class<?> run() {
                ClassLoader cl = clazz.getClassLoader();
                Class<?> loadedClass = null;
                try {
                    loadedClass = cl.loadClass(fqn);
                } catch (ClassNotFoundException e) {
                }
                if (loadedClass == null) {
                    try {
                        loadedClass = Thread.currentThread().getContextClassLoader().loadClass(fqn);
                    } catch (ClassNotFoundException e) {
                    }
                }
                return loadedClass;
            }
        });

    }

    static Class<?> loadClass(final ClassLoader classLoader, final String fqn) {
        return AccessController.doPrivileged(new PrivilegedAction<Class<?>>() {
            public Class<?> run() {
                try {
                    return classLoader.loadClass(fqn);
                } catch (ClassNotFoundException e) {
                }
                return null;
            }
        });
    }
}
