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Java > Open Source Codes > javassist > bytecode > AccessFlag


1 /*
2  * Javassist, a Java-bytecode translator toolkit.
3  * Copyright (C) 1999-2005 Shigeru Chiba. All Rights Reserved.
4  *
5  * The contents of this file are subject to the Mozilla Public License Version
6  * 1.1 (the "License"); you may not use this file except in compliance with
7  * the License. Alternatively, the contents of this file may be used under
8  * the terms of the GNU Lesser General Public License Version 2.1 or later.
9  *
10  * Software distributed under the License is distributed on an "AS IS" basis,
11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12  * for the specific language governing rights and limitations under the
13  * License.
14  */
15
16 package javassist.bytecode;
17
18 /**
19  * A support class providing static methods and constants
20  * for access modifiers such as public, rivate, ...
21  */
22 public class AccessFlag {
23     public static final int PUBLIC = 0x0001;
24     public static final int PRIVATE = 0x0002;
25     public static final int PROTECTED = 0x0004;
26     public static final int STATIC = 0x0008;
27     public static final int FINAL = 0x0010;
28     public static final int SYNCHRONIZED = 0x0020;
29     public static final int VOLATILE = 0x0040;
30     public static final int BRIDGE = 0x0040; // for method_info
31 public static final int TRANSIENT = 0x0080;
32     public static final int VARARGS = 0x0080; // for method_info
33 public static final int NATIVE = 0x0100;
34     public static final int INTERFACE = 0x0200;
35     public static final int ABSTRACT = 0x0400;
36     public static final int STRICT = 0x0800;
37     public static final int SYNTHETIC = 0x1000;
38     public static final int ANNOTATION = 0x2000;
39     public static final int ENUM = 0x4000;
40
41     public static final int SUPER = 0x0020;
42
43     // Note: 0x0020 is assigned to both ACC_SUPER and ACC_SYNCHRONIZED
44 // although java.lang.reflect.Modifier does not recognize ACC_SUPER.
45
46     /**
47      * Truns the public bit on. The protected and private bits are
48      * cleared.
49      */
50     public static int setPublic(int accflags) {
51         return (accflags & ~(PRIVATE | PROTECTED)) | PUBLIC;
52     }
53
54     /**
55      * Truns the protected bit on. The protected and public bits are
56      * cleared.
57      */
58     public static int setProtected(int accflags) {
59         return (accflags & ~(PRIVATE | PUBLIC)) | PROTECTED;
60     }
61
62     /**
63      * Truns the private bit on. The protected and private bits are
64      * cleared.
65      */
66     public static int setPrivate(int accflags) {
67         return (accflags & ~(PROTECTED | PUBLIC)) | PRIVATE;
68     }
69
70     /**
71      * Clears the public, protected, and private bits.
72      */
73     public static int setPackage(int accflags) {
74         return (accflags & ~(PROTECTED | PUBLIC | PRIVATE));
75     }
76
77     /**
78      * Returns true if the access flags include the public bit.
79      */
80     public static boolean isPublic(int accflags) {
81         return (accflags & PUBLIC) != 0;
82     }
83
84     /**
85      * Returns true if the access flags include the protected bit.
86      */
87     public static boolean isProtected(int accflags) {
88         return (accflags & PROTECTED) != 0;
89     }
90
91     /**
92      * Returns true if the access flags include the private bit.
93      */
94     public static boolean isPrivate(int accflags) {
95         return (accflags & PRIVATE) != 0;
96     }
97
98     /**
99      * Returns true if the access flags include neither public, protected,
100      * or private.
101      */
102     public static boolean isPackage(int accflags) {
103         return (accflags & (PROTECTED | PUBLIC | PRIVATE)) == 0;
104     }
105
106     /**
107      * Clears a specified bit in <code>accflags</code>.
108      */
109     public static int clear(int accflags, int clearBit) {
110         return accflags & ~clearBit;
111     }
112
113     /**
114      * Converts a javassist.Modifier into
115      * a javassist.bytecode.AccessFlag.
116      *
117      * @param modifier javassist.Modifier
118      */
119     public static int of(int modifier) {
120         return modifier;
121     }
122
123     /**
124      * Converts a javassist.bytecode.AccessFlag
125      * into a javassist.Modifier.
126      *
127      * @param accflags javassist.bytecode.Accessflag
128      */
129     public static int toModifier(int accflags) {
130         return accflags;
131     }
132 }
133
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