1 /*
2 * Copyright (c) 2003, 2013, 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 jdk.internal.misc;
27
28 import java.io.IOException;
29 import java.lang.annotation.Annotation;
30 import java.lang.reflect.Executable;
31 import java.lang.reflect.Layer;
32 import java.lang.reflect.Module;
33 import java.net.URL;
34 import java.security.AccessControlContext;
35 import java.util.Map;
36 import java.util.stream.Stream;
37
38 import jdk.internal.module.ServicesCatalog;
39 import sun.reflect.ConstantPool;
40 import sun.reflect.annotation.AnnotationType;
41 import sun.nio.ch.Interruptible;
42
43 public interface JavaLangAccess {
44 /** Return the constant pool for a class. */
45 ConstantPool getConstantPool(Class<?> klass);
46
47 /**
48 * Compare-And-Swap the AnnotationType instance corresponding to this class.
49 * (This method only applies to annotation types.)
50 */
51 boolean casAnnotationType(Class<?> klass, AnnotationType oldType, AnnotationType newType);
52
53 /**
54 * Get the AnnotationType instance corresponding to this class.
55 * (This method only applies to annotation types.)
56 */
57 AnnotationType getAnnotationType(Class<?> klass);
58
59 /**
60 * Get the declared annotations for a given class, indexed by their types.
61 */
62 Map<Class<? extends Annotation>, Annotation> getDeclaredAnnotationMap(Class<?> klass);
63
64 /**
65 * Get the array of bytes that is the class-file representation
66 * of this Class' annotations.
67 */
68 byte[] getRawClassAnnotations(Class<?> klass);
69
70 /**
71 * Get the array of bytes that is the class-file representation
72 * of this Class' type annotations.
73 */
74 byte[] getRawClassTypeAnnotations(Class<?> klass);
75
76 /**
77 * Get the array of bytes that is the class-file representation
78 * of this Executable's type annotations.
79 */
80 byte[] getRawExecutableTypeAnnotations(Executable executable);
81
82 /**
83 * Returns the elements of an enum class or null if the
84 * Class object does not represent an enum type;
85 * the result is uncloned, cached, and shared by all callers.
86 */
87 <E extends Enum<E>> E[] getEnumConstantsShared(Class<E> klass);
88
89 /** Set thread's blocker field. */
90 void blockedOn(Thread t, Interruptible b);
91
92 /**
93 * Registers a shutdown hook.
94 *
95 * It is expected that this method with registerShutdownInProgress=true
96 * is only used to register DeleteOnExitHook since the first file
97 * may be added to the delete on exit list by the application shutdown
98 * hooks.
99 *
100 * @param slot the slot in the shutdown hook array, whose element
101 * will be invoked in order during shutdown
102 * @param registerShutdownInProgress true to allow the hook
103 * to be registered even if the shutdown is in progress.
104 * @param hook the hook to be registered
105 *
106 * @throws IllegalStateException if shutdown is in progress and
107 * the slot is not valid to register.
108 */
109 void registerShutdownHook(int slot, boolean registerShutdownInProgress, Runnable hook);
110
111 /**
112 * Returns a new string backed by the provided character array. The
113 * character array is not copied and must never be modified after the
114 * String is created, in order to fulfill String's contract.
115 *
116 * @param chars the character array to back the string
117 * @return a newly created string whose content is the character array
118 */
119 String newStringUnsafe(char[] chars);
120
121 /**
122 * Returns a new Thread with the given Runnable and an
123 * inherited AccessControlContext.
124 */
125 Thread newThreadWithAcc(Runnable target, AccessControlContext acc);
126
127 /**
128 * Invokes the finalize method of the given object.
129 */
130 void invokeFinalize(Object o) throws Throwable;
131
132 /**
133 * Returns the boot Layer
134 */
135 Layer getBootLayer();
136
137 /**
138 * Returns the ServicesCatalog for the given class loader.
139 */
140 ServicesCatalog getServicesCatalog(ClassLoader cl);
141
142 /**
143 * Returns the ServicesCatalog for the given class loader, creating it
144 * if doesn't already exist.
145 */
146 ServicesCatalog createOrGetServicesCatalog(ClassLoader cl);
147
148 /**
149 * Returns a class loaded by the bootstrap class loader.
150 */
151 Class<?> findBootstrapClassOrNull(ClassLoader cl, String name);
152
153 /**
154 * Returns a URL to a resource with the given name in a module that is
155 * defined to the given class loader.
156 */
157 URL findResource(ClassLoader cl, String moduleName, String name) throws IOException;
158
159 /**
160 * Returns the Packages for the given class loader.
161 */
162 Stream<Package> packages(ClassLoader cl);
163
164 /**
165 * Define a Package of the given name and module by the given class loader.
166 */
167 Package definePackage(ClassLoader cl, String name, Module module);
168
169 /**
170 * Invokes Long.fastUUID
171 */
172 String fastUUID(long lsb, long msb);
173 }