1 /*
2  * Copyright (c) 2011, 2012, 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 java.lang.invoke;
27 
28 import sun.misc.Unsafe;
29 
30 /**
31  * This class consists exclusively of static names internal to the
32  * method handle implementation.
33  * Usage:  {@code import static java.lang.invoke.MethodHandleStatics.*}
34  * @author John Rose, JSR 292 EG
35  */
36 /*non-public*/ class MethodHandleStatics {
37 
MethodHandleStatics()38     private MethodHandleStatics() { }  // do not instantiate
39 
40     static final Unsafe UNSAFE = Unsafe.getUnsafe();
41 
42     // Android-changed: Remove debugging related static fields. They are unused and have
43     // no equivalent on Android.
44 
45     // Android-changed: Temporarily hide methods that operate on MethodHandles until the
46     // MethodHandle class is imported.
47     //
48     // /*non-public*/ static String getNameString(MethodHandle target, MethodType type) {
49     //     if (type == null)
50     //         type = target.type();
51     //     MemberName name = null;
52     //     if (target != null)
53     //         name = target.internalMemberName();
54     //     if (name == null)
55     //         return "invoke" + type;
56     //     return name.getName() + type;
57     // }
58     //
59     // /*non-public*/ static String getNameString(MethodHandle target, MethodHandle typeHolder) {
60     //     return getNameString(target, typeHolder == null ? (MethodType) null : typeHolder.type());
61     // }
62     //
63     // /*non-public*/ static String getNameString(MethodHandle target) {
64     //     return getNameString(target, (MethodType) null);
65     // }
66     //
67     // /*non-public*/ static String addTypeString(Object obj, MethodHandle target) {
68     //     String str = String.valueOf(obj);
69     //     if (target == null)  return str;
70     //     int paren = str.indexOf('(');
71     //     if (paren >= 0) str = str.substring(0, paren);
72     //     return str + target.type();
73     // }
74 
75     // handy shared exception makers (they simplify the common case code)
newInternalError(String message)76     /*non-public*/ static InternalError newInternalError(String message) {
77         return new InternalError(message);
78     }
newInternalError(String message, Throwable cause)79     /*non-public*/ static InternalError newInternalError(String message, Throwable cause) {
80         return new InternalError(message, cause);
81     }
newInternalError(Throwable cause)82     /*non-public*/ static InternalError newInternalError(Throwable cause) {
83         return new InternalError(cause);
84     }
newIllegalStateException(String message)85     /*non-public*/ static RuntimeException newIllegalStateException(String message) {
86         return new IllegalStateException(message);
87     }
newIllegalStateException(String message, Object obj)88     /*non-public*/ static RuntimeException newIllegalStateException(String message, Object obj) {
89         return new IllegalStateException(message(message, obj));
90     }
newIllegalArgumentException(String message)91     /*non-public*/ static RuntimeException newIllegalArgumentException(String message) {
92         return new IllegalArgumentException(message);
93     }
newIllegalArgumentException(String message, Object obj)94     /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj) {
95         return new IllegalArgumentException(message(message, obj));
96     }
newIllegalArgumentException(String message, Object obj, Object obj2)97     /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj, Object obj2) {
98         return new IllegalArgumentException(message(message, obj, obj2));
99     }
100     /** Propagate unchecked exceptions and errors, but wrap anything checked and throw that instead. */
uncaughtException(Throwable ex)101     /*non-public*/ static Error uncaughtException(Throwable ex) {
102         if (ex instanceof Error)  throw (Error) ex;
103         if (ex instanceof RuntimeException)  throw (RuntimeException) ex;
104         throw newInternalError("uncaught exception", ex);
105     }
NYI()106     static Error NYI() {
107         throw new AssertionError("NYI");
108     }
message(String message, Object obj)109     private static String message(String message, Object obj) {
110         if (obj != null)  message = message + ": " + obj;
111         return message;
112     }
message(String message, Object obj, Object obj2)113     private static String message(String message, Object obj, Object obj2) {
114         if (obj != null || obj2 != null)  message = message + ": " + obj + ", " + obj2;
115         return message;
116     }
117 }
118