/*

 * Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package javax.management.loading;

import static com.sun.jmx.defaults.JmxProperties.MBEANSERVER_LOGGER;

import java.util.Iterator;

import java.util.List;

import java.lang.System.Logger.Level;

import javax.management.MBeanServer;

import javax.management.MBeanServerFactory;

/**

 * <p>Keeps the list of Class Loaders registered in the MBean Server.

 * It provides the necessary methods to load classes using the registered

 * Class Loaders.</p>

 *

 * <p>This deprecated class is maintained for compatibility.  In

 * previous versions of JMX, there was one

 * <code>DefaultLoaderRepository</code> shared by all MBean servers.

 * As of JMX 1.2, that functionality is approximated by using {@link

 * MBeanServerFactory#findMBeanServer} to find all known MBean

 * servers, and consulting the {@link ClassLoaderRepository} of each

 * one.  It is strongly recommended that code referencing

 * <code>DefaultLoaderRepository</code> be rewritten.</p>

 *

 * @deprecated Use

 * {@link javax.management.MBeanServer#getClassLoaderRepository()}

 * instead.

 *

 * @since 1.5

 */

@Deprecated

public class DefaultLoaderRepository {

    /**

     * Go through the list of class loaders and try to load the requested

     * class.

     * The method will stop as soon as the class is found. If the class

     * is not found the method will throw a <CODE>ClassNotFoundException</CODE>

     * exception.

     *

     * @param className The name of the class to be loaded.

     *

     * @return the loaded class.

     *

     * @exception ClassNotFoundException The specified class could not be

     *            found.

     */

    public static Class<?> loadClass(String className)

        throws ClassNotFoundException {

        MBEANSERVER_LOGGER.log(Level.TRACE, className);

        return load(null, className);

    }

    /**

     * Go through the list of class loaders but exclude the given

     * class loader, then try to load

     * the requested class.

     * The method will stop as soon as the class is found. If the class

     * is not found the method will throw a <CODE>ClassNotFoundException</CODE>

     * exception.

     *

     * @param className The name of the class to be loaded.

     * @param loader The class loader to be excluded.

     *

     * @return the loaded class.

     *

     * @exception ClassNotFoundException The specified class could not be

     *    found.

     */

    public static Class<?> loadClassWithout(ClassLoader loader,

                                         String className)

        throws ClassNotFoundException {

        MBEANSERVER_LOGGER.log(Level.TRACE, className);

        return load(loader, className);

    }

    private static Class<?> load(ClassLoader without, String className)

            throws ClassNotFoundException {

        final List<MBeanServer> mbsList = MBeanServerFactory.findMBeanServer(null);

        for (MBeanServer mbs : mbsList) {

            ClassLoaderRepository clr = mbs.getClassLoaderRepository();

            try {

                return clr.loadClassWithout(without, className);

            } catch (ClassNotFoundException e) {

                // OK : Try with next one...

            }

        }

        throw new ClassNotFoundException(className);

    }

 }