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| 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 | + */ |
| 25 | + |
| 26 | +package com.sun.tools.classfile; |
| 27 | + |
| 28 | +import java.io.IOException; |
| 29 | +import java.util.LinkedHashSet; |
| 30 | +import java.util.Set; |
| 31 | + |
| 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 |
| 60 | + |
| 61 | + private static enum Type { Class, InnerClass, Field, Method}; |
| 62 | + |
| 63 | + AccessFlags(ClassReader cr) throws IOException { |
| 64 | + this(cr.readUnsignedShort()); |
| 65 | + } |
| 66 | + |
| 67 | + public AccessFlags(int flags) { |
| 68 | + this.flags = flags; |
| 69 | + } |
| 70 | + |
| 71 | + public AccessFlags ignore(int mask) { |
| 72 | + return new AccessFlags(flags & ~mask); |
| 73 | + } |
| 74 | + |
| 75 | + public boolean is(int mask) { |
| 76 | + return (flags & mask) != 0; |
| 77 | + } |
| 78 | + |
| 79 | + private static final int[] classModifiers = { |
| 80 | + ACC_PUBLIC, ACC_FINAL, ACC_ABSTRACT, ACC_MODULE |
| 81 | + }; |
| 82 | + |
| 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 | + }; |
| 87 | + |
| 88 | + public Set<String> getClassModifiers() { |
| 89 | + int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags); |
| 90 | + return getModifiers(f, classModifiers, Type.Class); |
| 91 | + } |
| 92 | + |
| 93 | + public Set<String> getClassFlags() { |
| 94 | + return getFlags(classFlags, Type.Class); |
| 95 | + } |
| 96 | + |
| 97 | + private static final int[] innerClassModifiers = { |
| 98 | + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, |
| 99 | + ACC_ABSTRACT, ACC_MODULE |
| 100 | + }; |
| 101 | + |
| 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 | + }; |
| 106 | + |
| 107 | + public Set<String> getInnerClassModifiers() { |
| 108 | + int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags); |
| 109 | + return getModifiers(f, innerClassModifiers, Type.InnerClass); |
| 110 | + } |
| 111 | + |
| 112 | + public Set<String> getInnerClassFlags() { |
| 113 | + return getFlags(innerClassFlags, Type.InnerClass); |
| 114 | + } |
| 115 | + |
| 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 | + }; |
| 120 | + |
| 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 | + }; |
| 125 | + |
| 126 | + public Set<String> getFieldModifiers() { |
| 127 | + return getModifiers(fieldModifiers, Type.Field); |
| 128 | + } |
| 129 | + |
| 130 | + public Set<String> getFieldFlags() { |
| 131 | + return getFlags(fieldFlags, Type.Field); |
| 132 | + } |
| 133 | + |
| 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 | + }; |
| 138 | + |
| 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 | + }; |
| 144 | + |
| 145 | + public Set<String> getMethodModifiers() { |
| 146 | + return getModifiers(methodModifiers, Type.Method); |
| 147 | + } |
| 148 | + |
| 149 | + public Set<String> getMethodFlags() { |
| 150 | + return getFlags(methodFlags, Type.Method); |
| 151 | + } |
| 152 | + |
| 153 | + private Set<String> getModifiers(int[] modifierFlags, Type t) { |
| 154 | + return getModifiers(flags, modifierFlags, t); |
| 155 | + } |
| 156 | + |
| 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 | + } |
| 165 | + |
| 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 | + } |
| 182 | + |
| 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 | + } |
| 213 | + |
| 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 | + } |
| 252 | + |
| 253 | + final int flags; |
| 254 | +} |
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