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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2017 Oracle and/or its affiliates. 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
 * https://oss.oracle.com/licenses/CDDL+GPL-1.1
 * or LICENSE.txt.  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 at LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
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 * elects to include this software in this distribution under the [CDDL or GPL
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 */

package com.sun.xml.bind.v2.model.nav;

/**
 * Class defined for safe calls of getClassLoader methods of any kind (context/system/class
 * classloader. This MUST be package private and defined in every package which 
 * uses such invocations.
 * @author snajper
 */
class SecureLoader {

    static ClassLoader getContextClassLoader() {
        if (System.getSecurityManager() == null) {
            return Thread.currentThread().getContextClassLoader();
        } else {
            return java.security.AccessController.doPrivileged(
                    new java.security.PrivilegedAction() {
                        public ClassLoader run() {
                            return Thread.currentThread().getContextClassLoader();
                        }
                    });
        }
    }

    static ClassLoader getClassClassLoader(final Class c) {
        if (System.getSecurityManager() == null) {
            return c.getClassLoader();
        } else {
            return java.security.AccessController.doPrivileged(
                    new java.security.PrivilegedAction() {
                        public ClassLoader run() {
                            return c.getClassLoader();
                        }
                    });
        }
    }

    static ClassLoader getSystemClassLoader() {
        if (System.getSecurityManager() == null) {
            return ClassLoader.getSystemClassLoader();
        } else {
            return java.security.AccessController.doPrivileged(
                    new java.security.PrivilegedAction() {
                        public ClassLoader run() {
                            return ClassLoader.getSystemClassLoader();
                        }
                    });
        }
    }
    
}