1/* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package sun.security.jgss; 27 28import org.ietf.jgss.GSSContext; 29import org.ietf.jgss.GSSCredential; 30 31/** 32 * The extending point of basic JGSS-API. 33 * <p> 34 * If a module wants to extend basic JGSS-API classes, it should extends this 35 * class and register itself as "the extender" using the setExtender method. 36 * When various GSSManager.createXXX methods are called, they will call 37 * "the extender"'s wrap methods to create objects of extended types 38 * instead of basic types. 39 * <p> 40 * We have only one extension now defined in com.sun.security.jgss, and the 41 * registering process is triggered in {@link GSSManagerImpl} by calling 42 * Class.forName("com.sun.security.jgss.Extender"). Only GSSContext 43 * and GSSCredential are extended now. 44 * <p> 45 * The setExtender method should be called before any JGSS call. 46 */ 47public class JgssExtender { 48 49 // "The extender" 50 private static volatile JgssExtender theOne = new JgssExtender(); 51 52 /** 53 * Gets "the extender". GSSManager calls this method so that it can 54 * wrap basic objects into extended objects. 55 * @return the extender 56 */ 57 public static JgssExtender getExtender() { 58 return theOne; 59 } 60 61 /** 62 * Set "the extender" so that GSSManager can create extended objects. 63 */ 64 protected static void setExtender(JgssExtender theOne) { 65 JgssExtender.theOne = theOne; 66 } 67 68 /** 69 * Wraps a plain GSSCredential object into an extended type. 70 */ 71 public GSSCredential wrap(GSSCredential cred) { 72 return cred; 73 } 74 75 /** 76 * Wraps a plain GSSContext object into an extended type. 77 */ 78 public GSSContext wrap(GSSContext ctxt) { 79 return ctxt; 80 } 81} 82