Here you can find the source of resolveClientClassLoader(Map env)
public static ClassLoader resolveClientClassLoader(Map env)
//package com.java2s; /*/* w w w . j a va2s. c o m*/ * @(#)EnvHelp.java 1.5 * * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved. * * The contents of this file are subject to the terms of either the GNU General * Public License Version 2 only ("GPL") or the Common Development and * Distribution License("CDDL")(collectively, the "License"). You may not use * this file except in compliance with the License. You can obtain a copy of the * License at http://opendmk.dev.java.net/legal_notices/licenses.txt or in the * LEGAL_NOTICES folder that accompanied this code. See the License for the * specific language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each * file and include the License file found at * http://opendmk.dev.java.net/legal_notices/licenses.txt * or in the LEGAL_NOTICES folder that accompanied this code. * Sun designates this particular file as subject to the "Classpath" exception * as provided by Sun in the GPL Version 2 section of the License file that * accompanied this code. * * If applicable, add the following below the License Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * * "Portions Copyrighted [year] [name of copyright owner]" * * Contributor(s): * * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding * * "[Contributor] elects to include this software in this distribution * under the [CDDL or GPL Version 2] license." * * If you don't indicate a single choice of license, a recipient has the option * to distribute your version of this file under either the CDDL or the GPL * Version 2, or to extend the choice of license to its licensees as provided * above. However, if you add GPL Version 2 code and therefore, elected the * GPL Version 2 license, then the option applies only if the new code is made * subject to such option by the copyright holder. * */ import java.util.Map; import javax.management.remote.JMXConnectorFactory; public class Main { /** * <p>Name of the attribute that specifies a default class loader * object. * The value associated with this attribute is a ClassLoader object</p> */ private static final String DEFAULT_CLASS_LOADER = JMXConnectorFactory.DEFAULT_CLASS_LOADER; /** * Get the Connector Client default class loader. * <p> * Returns: * <p> * <ul> * <li> * The ClassLoader object found in <var>env</var> for * <tt>jmx.remote.default.class.loader</tt>, if any. * </li> * <li>The <tt>Thread.currentThread().getContextClassLoader()</tt> * otherwise. * </li> * </ul> * <p> * Usually a Connector Client will call * <pre> * ClassLoader dcl = EnvHelp.resolveClientClassLoader(env); * </pre> * in its <tt>connect(Map env)</tt> method. * * @return The connector client default class loader. * * @exception IllegalArgumentException if * <tt>jmx.remote.default.class.loader</tt> is specified * and is not an instance of {@link ClassLoader}. */ public static ClassLoader resolveClientClassLoader(Map env) { if (env == null) return Thread.currentThread().getContextClassLoader(); Object loader = env.get(DEFAULT_CLASS_LOADER); if (loader == null) return Thread.currentThread().getContextClassLoader(); if (loader instanceof ClassLoader) { return (ClassLoader) loader; } else { final String msg = "ClassLoader object is not an instance of " + ClassLoader.class.getName() + " : " + loader.getClass().getName(); throw new IllegalArgumentException(msg); } } }