Mercurial > jdk8-mips64-public > langtools / file revision
src/share/classes/com/sun/tools/classfile/AccessFlags.java@7708bd6d800d
src/share/classes/com/sun/tools/classfile/AccessFlags.java
Tue, 03 Jun 2008 13:26:47 -0700
- author
- jjg
- date
- Tue, 03 Jun 2008 13:26:47 -0700
- changeset 46
- 7708bd6d800d
- child 54
- eaf608c64fec
- permissions
- -rw-r--r--
4075303: Use javap to enquire aboput a specific inner class
4348375: Javap is not internationalized
4459541: "javap -l" shows line numbers as signed short; they should be unsigned
4501660: change diagnostic of -help as 'print this help message and exit'
4776241: unused source file in javap...
4870651: javap should recognize generics, varargs, enum
4876942: javap invoked without args does not print help screen
4880663: javap could output whitespace between class name and opening brace
4975569: javap doesn't print new flag bits
6271787: javap dumps LocalVariableTypeTable attribute in hex, needs to print a table
6305779: javap: support annotations
6439940: Clean up javap implementation
6469569: wrong check of searchpath in JavapEnvironment
6474890: javap does not open .zip files in -classpath
6587786: Javap throws error : "ERROR:Could not find <classname>" for JRE classes
6622215: javap ignores certain relevant access flags
6622216: javap names some attributes incorrectly
6622232: javap gets whitespace confused
6622260: javap prints negative bytes incorrectly in hex
Reviewed-by: ksrini
1 /*
2 * Copyright 2007 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
26 package com.sun.tools.classfile;
28 import java.io.IOException;
29 import java.util.LinkedHashSet;
30 import java.util.Set;
32 /**
33 * See JVMS3, sections 4.2, 4.6, 4.7.
34 *
35 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
36 * you write code that depends on this, you do so at your own risk.
37 * This code and its internal interfaces are subject to change or
38 * deletion without notice.</b>
39 */
40 public class AccessFlags {
41 public static final int ACC_PUBLIC = 0x0001; // class, inner, field, method
42 public static final int ACC_PRIVATE = 0x0002; // inner, field, method
43 public static final int ACC_PROTECTED = 0x0004; // inner, field, method
44 public static final int ACC_STATIC = 0x0008; // inner, field, method
45 public static final int ACC_FINAL = 0x0010; // class, inner, field, method
46 public static final int ACC_SUPER = 0x0020; // class
47 public static final int ACC_SYNCHRONIZED = 0x0020; // method
48 public static final int ACC_VOLATILE = 0x0040; // field
49 public static final int ACC_BRIDGE = 0x0040; // method
50 public static final int ACC_TRANSIENT = 0x0080; // field
51 public static final int ACC_VARARGS = 0x0080; // method
52 public static final int ACC_NATIVE = 0x0100; // method
53 public static final int ACC_INTERFACE = 0x0200; // class, inner
54 public static final int ACC_ABSTRACT = 0x0400; // class, inner, method
55 public static final int ACC_STRICT = 0x0800; // method
56 public static final int ACC_SYNTHETIC = 0x1000; // class, inner, field, method
57 public static final int ACC_ANNOTATION = 0x2000; // class, inner
58 public static final int ACC_ENUM = 0x4000; // class, inner, field
59 public static final int ACC_MODULE = 0x8000; // class, inner, field, method
61 private static enum Type { Class, InnerClass, Field, Method};
63 AccessFlags(ClassReader cr) throws IOException {
64 this(cr.readUnsignedShort());
65 }
67 public AccessFlags(int flags) {
68 this.flags = flags;
69 }
71 public AccessFlags ignore(int mask) {
72 return new AccessFlags(flags & ~mask);
73 }
75 public boolean is(int mask) {
76 return (flags & mask) != 0;
77 }
79 private static final int[] classModifiers = {
80 ACC_PUBLIC, ACC_FINAL, ACC_ABSTRACT, ACC_MODULE
81 };
83 private static final int[] classFlags = {
84 ACC_PUBLIC, ACC_FINAL, ACC_SUPER, ACC_INTERFACE, ACC_ABSTRACT,
85 ACC_SYNTHETIC, ACC_ANNOTATION, ACC_ENUM, ACC_MODULE
86 };
88 public Set<String> getClassModifiers() {
89 int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags);
90 return getModifiers(f, classModifiers, Type.Class);
91 }
93 public Set<String> getClassFlags() {
94 return getFlags(classFlags, Type.Class);
95 }
97 private static final int[] innerClassModifiers = {
98 ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL,
99 ACC_ABSTRACT, ACC_MODULE
100 };
102 private static final int[] innerClassFlags = {
103 ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, ACC_SUPER,
104 ACC_INTERFACE, ACC_ABSTRACT, ACC_SYNTHETIC, ACC_ANNOTATION, ACC_ENUM, ACC_MODULE
105 };
107 public Set<String> getInnerClassModifiers() {
108 int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags);
109 return getModifiers(f, innerClassModifiers, Type.InnerClass);
110 }
112 public Set<String> getInnerClassFlags() {
113 return getFlags(innerClassFlags, Type.InnerClass);
114 }
116 private static final int[] fieldModifiers = {
117 ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL,
118 ACC_VOLATILE, ACC_TRANSIENT, ACC_MODULE
119 };
121 private static final int[] fieldFlags = {
122 ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL,
123 ACC_VOLATILE, ACC_TRANSIENT, ACC_SYNTHETIC, ACC_ENUM, ACC_MODULE
124 };
126 public Set<String> getFieldModifiers() {
127 return getModifiers(fieldModifiers, Type.Field);
128 }
130 public Set<String> getFieldFlags() {
131 return getFlags(fieldFlags, Type.Field);
132 }
134 private static final int[] methodModifiers = {
135 ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL,
136 ACC_SYNCHRONIZED, ACC_NATIVE, ACC_ABSTRACT, ACC_STRICT, ACC_MODULE
137 };
139 private static final int[] methodFlags = {
140 ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL,
141 ACC_SYNCHRONIZED, ACC_BRIDGE, ACC_VARARGS, ACC_NATIVE, ACC_ABSTRACT,
142 ACC_STRICT, ACC_SYNTHETIC, ACC_MODULE
143 };
145 public Set<String> getMethodModifiers() {
146 return getModifiers(methodModifiers, Type.Method);
147 }
149 public Set<String> getMethodFlags() {
150 return getFlags(methodFlags, Type.Method);
151 }
153 private Set<String> getModifiers(int[] modifierFlags, Type t) {
154 return getModifiers(flags, modifierFlags, t);
155 }
157 private static Set<String> getModifiers(int flags, int[] modifierFlags, Type t) {
158 Set<String> s = new LinkedHashSet<String>();
159 for (int m: modifierFlags) {
160 if ((flags & m) != 0)
161 s.add(flagToModifier(m, t));
162 }
163 return s;
164 }
166 private Set<String> getFlags(int[] expectedFlags, Type t) {
167 Set<String> s = new LinkedHashSet<String>();
168 int f = flags;
169 for (int e: expectedFlags) {
170 if ((f & e) != 0) {
171 s.add(flagToName(e, t));
172 f = f & ~e;
173 }
174 }
175 while (f != 0) {
176 int bit = Integer.highestOneBit(f);
177 s.add("0x" + Integer.toHexString(bit));
178 f = f & ~bit;
179 }
180 return s;
181 }
183 private static String flagToModifier(int flag, Type t) {
184 switch (flag) {
185 case ACC_PUBLIC:
186 return "public";
187 case ACC_PRIVATE:
188 return "private";
189 case ACC_PROTECTED:
190 return "protected";
191 case ACC_STATIC:
192 return "static";
193 case ACC_FINAL:
194 return "final";
195 case ACC_SYNCHRONIZED:
196 return "synchronized";
197 case 0x80:
198 return (t == Type.Field ? "transient" : null);
199 case ACC_VOLATILE:
200 return "volatile";
201 case ACC_NATIVE:
202 return "native";
203 case ACC_ABSTRACT:
204 return "abstract";
205 case ACC_STRICT:
206 return "strictfp";
207 case ACC_MODULE:
208 return "module";
209 default:
210 return null;
211 }
212 }
214 private static String flagToName(int flag, Type t) {
215 switch (flag) {
216 case ACC_PUBLIC:
217 return "ACC_PUBLIC";
218 case ACC_PRIVATE:
219 return "ACC_PRIVATE";
220 case ACC_PROTECTED:
221 return "ACC_PROTECTED";
222 case ACC_STATIC:
223 return "ACC_STATIC";
224 case ACC_FINAL:
225 return "ACC_FINAL";
226 case 0x20:
227 return (t == Type.Class ? "ACC_SUPER" : "ACC_SYNCHRONIZED");
228 case 0x40:
229 return (t == Type.Field ? "ACC_VOLATILE" : "ACC_BRIDGE");
230 case 0x80:
231 return (t == Type.Field ? "ACC_TRANSIENT" : "ACC_VARARGS");
232 case ACC_NATIVE:
233 return "ACC_NATIVE";
234 case ACC_INTERFACE:
235 return "ACC_INTERFACE";
236 case ACC_ABSTRACT:
237 return "ACC_ABSTRACT";
238 case ACC_STRICT:
239 return "ACC_STRICT";
240 case ACC_SYNTHETIC:
241 return "ACC_SYNTHETIC";
242 case ACC_ANNOTATION:
243 return "ACC_ANNOTATION";
244 case ACC_ENUM:
245 return "ACC_ENUM";
246 case ACC_MODULE:
247 return "ACC_MODULE";
248 default:
249 return null;
250 }
251 }
253 final int flags;
254 }
