1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/classes/com/sun/tools/classfile/AccessFlags.java Tue Jun 03 13:26:47 2008 -0700
1.3 @@ -0,0 +1,254 @@
1.4 +/*
1.5 + * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Sun designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Sun in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.25 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.26 + * have any questions.
1.27 + */
1.28 +
1.29 +package com.sun.tools.classfile;
1.30 +
1.31 +import java.io.IOException;
1.32 +import java.util.LinkedHashSet;
1.33 +import java.util.Set;
1.34 +
1.35 +/**
1.36 + * See JVMS3, sections 4.2, 4.6, 4.7.
1.37 + *
1.38 + * <p><b>This is NOT part of any API supported by Sun Microsystems. If
1.39 + * you write code that depends on this, you do so at your own risk.
1.40 + * This code and its internal interfaces are subject to change or
1.41 + * deletion without notice.</b>
1.42 + */
1.43 +public class AccessFlags {
1.44 + public static final int ACC_PUBLIC = 0x0001; // class, inner, field, method
1.45 + public static final int ACC_PRIVATE = 0x0002; // inner, field, method
1.46 + public static final int ACC_PROTECTED = 0x0004; // inner, field, method
1.47 + public static final int ACC_STATIC = 0x0008; // inner, field, method
1.48 + public static final int ACC_FINAL = 0x0010; // class, inner, field, method
1.49 + public static final int ACC_SUPER = 0x0020; // class
1.50 + public static final int ACC_SYNCHRONIZED = 0x0020; // method
1.51 + public static final int ACC_VOLATILE = 0x0040; // field
1.52 + public static final int ACC_BRIDGE = 0x0040; // method
1.53 + public static final int ACC_TRANSIENT = 0x0080; // field
1.54 + public static final int ACC_VARARGS = 0x0080; // method
1.55 + public static final int ACC_NATIVE = 0x0100; // method
1.56 + public static final int ACC_INTERFACE = 0x0200; // class, inner
1.57 + public static final int ACC_ABSTRACT = 0x0400; // class, inner, method
1.58 + public static final int ACC_STRICT = 0x0800; // method
1.59 + public static final int ACC_SYNTHETIC = 0x1000; // class, inner, field, method
1.60 + public static final int ACC_ANNOTATION = 0x2000; // class, inner
1.61 + public static final int ACC_ENUM = 0x4000; // class, inner, field
1.62 + public static final int ACC_MODULE = 0x8000; // class, inner, field, method
1.63 +
1.64 + private static enum Type { Class, InnerClass, Field, Method};
1.65 +
1.66 + AccessFlags(ClassReader cr) throws IOException {
1.67 + this(cr.readUnsignedShort());
1.68 + }
1.69 +
1.70 + public AccessFlags(int flags) {
1.71 + this.flags = flags;
1.72 + }
1.73 +
1.74 + public AccessFlags ignore(int mask) {
1.75 + return new AccessFlags(flags & ~mask);
1.76 + }
1.77 +
1.78 + public boolean is(int mask) {
1.79 + return (flags & mask) != 0;
1.80 + }
1.81 +
1.82 + private static final int[] classModifiers = {
1.83 + ACC_PUBLIC, ACC_FINAL, ACC_ABSTRACT, ACC_MODULE
1.84 + };
1.85 +
1.86 + private static final int[] classFlags = {
1.87 + ACC_PUBLIC, ACC_FINAL, ACC_SUPER, ACC_INTERFACE, ACC_ABSTRACT,
1.88 + ACC_SYNTHETIC, ACC_ANNOTATION, ACC_ENUM, ACC_MODULE
1.89 + };
1.90 +
1.91 + public Set<String> getClassModifiers() {
1.92 + int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags);
1.93 + return getModifiers(f, classModifiers, Type.Class);
1.94 + }
1.95 +
1.96 + public Set<String> getClassFlags() {
1.97 + return getFlags(classFlags, Type.Class);
1.98 + }
1.99 +
1.100 + private static final int[] innerClassModifiers = {
1.101 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL,
1.102 + ACC_ABSTRACT, ACC_MODULE
1.103 + };
1.104 +
1.105 + private static final int[] innerClassFlags = {
1.106 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, ACC_SUPER,
1.107 + ACC_INTERFACE, ACC_ABSTRACT, ACC_SYNTHETIC, ACC_ANNOTATION, ACC_ENUM, ACC_MODULE
1.108 + };
1.109 +
1.110 + public Set<String> getInnerClassModifiers() {
1.111 + int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags);
1.112 + return getModifiers(f, innerClassModifiers, Type.InnerClass);
1.113 + }
1.114 +
1.115 + public Set<String> getInnerClassFlags() {
1.116 + return getFlags(innerClassFlags, Type.InnerClass);
1.117 + }
1.118 +
1.119 + private static final int[] fieldModifiers = {
1.120 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL,
1.121 + ACC_VOLATILE, ACC_TRANSIENT, ACC_MODULE
1.122 + };
1.123 +
1.124 + private static final int[] fieldFlags = {
1.125 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL,
1.126 + ACC_VOLATILE, ACC_TRANSIENT, ACC_SYNTHETIC, ACC_ENUM, ACC_MODULE
1.127 + };
1.128 +
1.129 + public Set<String> getFieldModifiers() {
1.130 + return getModifiers(fieldModifiers, Type.Field);
1.131 + }
1.132 +
1.133 + public Set<String> getFieldFlags() {
1.134 + return getFlags(fieldFlags, Type.Field);
1.135 + }
1.136 +
1.137 + private static final int[] methodModifiers = {
1.138 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL,
1.139 + ACC_SYNCHRONIZED, ACC_NATIVE, ACC_ABSTRACT, ACC_STRICT, ACC_MODULE
1.140 + };
1.141 +
1.142 + private static final int[] methodFlags = {
1.143 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL,
1.144 + ACC_SYNCHRONIZED, ACC_BRIDGE, ACC_VARARGS, ACC_NATIVE, ACC_ABSTRACT,
1.145 + ACC_STRICT, ACC_SYNTHETIC, ACC_MODULE
1.146 + };
1.147 +
1.148 + public Set<String> getMethodModifiers() {
1.149 + return getModifiers(methodModifiers, Type.Method);
1.150 + }
1.151 +
1.152 + public Set<String> getMethodFlags() {
1.153 + return getFlags(methodFlags, Type.Method);
1.154 + }
1.155 +
1.156 + private Set<String> getModifiers(int[] modifierFlags, Type t) {
1.157 + return getModifiers(flags, modifierFlags, t);
1.158 + }
1.159 +
1.160 + private static Set<String> getModifiers(int flags, int[] modifierFlags, Type t) {
1.161 + Set<String> s = new LinkedHashSet<String>();
1.162 + for (int m: modifierFlags) {
1.163 + if ((flags & m) != 0)
1.164 + s.add(flagToModifier(m, t));
1.165 + }
1.166 + return s;
1.167 + }
1.168 +
1.169 + private Set<String> getFlags(int[] expectedFlags, Type t) {
1.170 + Set<String> s = new LinkedHashSet<String>();
1.171 + int f = flags;
1.172 + for (int e: expectedFlags) {
1.173 + if ((f & e) != 0) {
1.174 + s.add(flagToName(e, t));
1.175 + f = f & ~e;
1.176 + }
1.177 + }
1.178 + while (f != 0) {
1.179 + int bit = Integer.highestOneBit(f);
1.180 + s.add("0x" + Integer.toHexString(bit));
1.181 + f = f & ~bit;
1.182 + }
1.183 + return s;
1.184 + }
1.185 +
1.186 + private static String flagToModifier(int flag, Type t) {
1.187 + switch (flag) {
1.188 + case ACC_PUBLIC:
1.189 + return "public";
1.190 + case ACC_PRIVATE:
1.191 + return "private";
1.192 + case ACC_PROTECTED:
1.193 + return "protected";
1.194 + case ACC_STATIC:
1.195 + return "static";
1.196 + case ACC_FINAL:
1.197 + return "final";
1.198 + case ACC_SYNCHRONIZED:
1.199 + return "synchronized";
1.200 + case 0x80:
1.201 + return (t == Type.Field ? "transient" : null);
1.202 + case ACC_VOLATILE:
1.203 + return "volatile";
1.204 + case ACC_NATIVE:
1.205 + return "native";
1.206 + case ACC_ABSTRACT:
1.207 + return "abstract";
1.208 + case ACC_STRICT:
1.209 + return "strictfp";
1.210 + case ACC_MODULE:
1.211 + return "module";
1.212 + default:
1.213 + return null;
1.214 + }
1.215 + }
1.216 +
1.217 + private static String flagToName(int flag, Type t) {
1.218 + switch (flag) {
1.219 + case ACC_PUBLIC:
1.220 + return "ACC_PUBLIC";
1.221 + case ACC_PRIVATE:
1.222 + return "ACC_PRIVATE";
1.223 + case ACC_PROTECTED:
1.224 + return "ACC_PROTECTED";
1.225 + case ACC_STATIC:
1.226 + return "ACC_STATIC";
1.227 + case ACC_FINAL:
1.228 + return "ACC_FINAL";
1.229 + case 0x20:
1.230 + return (t == Type.Class ? "ACC_SUPER" : "ACC_SYNCHRONIZED");
1.231 + case 0x40:
1.232 + return (t == Type.Field ? "ACC_VOLATILE" : "ACC_BRIDGE");
1.233 + case 0x80:
1.234 + return (t == Type.Field ? "ACC_TRANSIENT" : "ACC_VARARGS");
1.235 + case ACC_NATIVE:
1.236 + return "ACC_NATIVE";
1.237 + case ACC_INTERFACE:
1.238 + return "ACC_INTERFACE";
1.239 + case ACC_ABSTRACT:
1.240 + return "ACC_ABSTRACT";
1.241 + case ACC_STRICT:
1.242 + return "ACC_STRICT";
1.243 + case ACC_SYNTHETIC:
1.244 + return "ACC_SYNTHETIC";
1.245 + case ACC_ANNOTATION:
1.246 + return "ACC_ANNOTATION";
1.247 + case ACC_ENUM:
1.248 + return "ACC_ENUM";
1.249 + case ACC_MODULE:
1.250 + return "ACC_MODULE";
1.251 + default:
1.252 + return null;
1.253 + }
1.254 + }
1.255 +
1.256 + final int flags;
1.257 +}
