1 /*
2 * Copyright (c) 2008, 2017, 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
26 package com.sun.xml.internal.ws.model;
27
28 import java.lang.reflect.Field;
29 import javax.xml.ws.WebServiceException;
30 import java.lang.reflect.InvocationTargetException;
31 import java.lang.reflect.Method;
32 import java.net.URL;
33 import java.security.AccessController;
34 import java.security.PrivilegedAction;
35 import java.security.PrivilegedActionException;
36 import java.security.PrivilegedExceptionAction;
37 import java.security.ProtectionDomain;
38 import java.util.logging.Level;
39 import java.util.logging.Logger;
40
41 /**
42 * A {@link ClassLoader} used to "inject" wrapper and exception bean classes
43 * into the VM.
44 *
45 * @author Jitendra kotamraju
46 */
47 final class Injector {
48
49 private static final Logger LOGGER = Logger.getLogger(Injector.class.getName());
50
51 private static Method defineClass;
52 private static Method resolveClass;
53 private static Method getPackage;
54 private static Method definePackage;
55 private static Object U;
56
57 static {
58 try {
59 Method[] m = AccessController.doPrivileged(
60 new PrivilegedAction<Method[]>() {
61 @Override
62 public Method[] run() {
63 return new Method[]{
64 getMethod(ClassLoader.class, "defineClass", String.class, byte[].class, Integer.TYPE, Integer.TYPE),
65 getMethod(ClassLoader.class, "resolveClass", Class.class),
66 getMethod(ClassLoader.class, "getPackage", String.class),
67 getMethod(ClassLoader.class, "definePackage",
68 String.class, String.class, String.class, String.class,
69 String.class, String.class, String.class, URL.class)
70 };
71 }
72 }
73 );
74 defineClass = m[0];
75 resolveClass = m[1];
76 getPackage = m[2];
77 definePackage = m[3];
78
79 } catch (Throwable t) {
80 try {
81 U = AccessController.doPrivileged(new PrivilegedExceptionAction() {
82 @Override
83 public Object run() throws Exception {
84 Class u = Class.forName("sun.misc.Unsafe");
85 Field theUnsafe = u.getDeclaredField("theUnsafe");
86 theUnsafe.setAccessible(true);
87 return theUnsafe.get(null);
88 }
89 });
90 defineClass = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() {
91 @Override
92 public Method run() throws Exception {
93 try {
94 return U.getClass().getMethod("defineClass",
95 new Class[]{String.class,
96 byte[].class,
97 Integer.TYPE,
98 Integer.TYPE,
99 ClassLoader.class,
100 ProtectionDomain.class});
101 } catch (NoSuchMethodException | SecurityException ex) {
102 throw ex;
103 }
104 }
105 });
106 } catch (SecurityException | PrivilegedActionException ex) {
107 Logger.getLogger(Injector.class.getName()).log(Level.SEVERE, null, ex);
108 WebServiceException we = new WebServiceException(ex);
109 we.addSuppressed(t);
110 throw we;
111 }
112 }
113 }
114
115 private static Method getMethod(final Class<?> c, final String methodname, final Class<?>... params) {
116 try {
117 Method m = c.getDeclaredMethod(methodname, params);
118 m.setAccessible(true);
119 return m;
120 } catch (NoSuchMethodException e) {
121 // impossible
122 throw new NoSuchMethodError(e.getMessage());
123 }
124 }
125
126 static synchronized Class inject(ClassLoader cl, String className, byte[] image) {
127 // To avoid race conditions let us check if the classloader
128 // already contains the class
129 try {
130 return cl.loadClass(className);
131 } catch (ClassNotFoundException e) {
132 // nothing to do
133 }
134 try {
135 if (definePackage == null) {
136 return (Class) defineClass.invoke(U, className.replace('/', '.'), image, 0, image.length, cl, Injector.class.getProtectionDomain());
137 }
138 int packIndex = className.lastIndexOf('.');
139 if (packIndex != -1) {
140 String pkgname = className.substring(0, packIndex);
141 // Check if package already loaded.
142 Package pkg = (Package) getPackage.invoke(cl, pkgname);
143 if (pkg == null) {
144 definePackage.invoke(cl, pkgname, null, null, null, null, null, null, null);
145 }
146 }
147
148 Class c = (Class) defineClass.invoke(cl, className.replace('/', '.'), image, 0, image.length);
149 resolveClass.invoke(cl, c);
150 return c;
151 } catch (IllegalAccessException | InvocationTargetException e) {
152 if (LOGGER.isLoggable(Level.FINE)) {
153 LOGGER.log(Level.FINE, "Unable to inject " + className, e);
154 }
155 throw new WebServiceException(e);
156 }
157 }
158
159 }