1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/share/classes/com/sun/tools/classfile/AccessFlags.java Wed Apr 27 01:34:52 2016 +0800 1.3 @@ -0,0 +1,258 @@ 1.4 +/* 1.5 + * Copyright (c) 2007, 2013, Oracle and/or its affiliates. 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. Oracle designates this 1.11 + * particular file as subject to the "Classpath" exception as provided 1.12 + * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.25 + * or visit www.oracle.com if you need additional information or have any 1.26 + * 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 JVMS, sections 4.2, 4.6, 4.7. 1.37 + * 1.38 + * <p><b>This is NOT part of any supported API. 1.39 + * If 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_MANDATED = 0x8000; // class, inner, field, method 1.63 + 1.64 + public static enum Kind { 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 + public int byteLength() { 1.83 + return 2; 1.84 + } 1.85 + 1.86 + private static final int[] classModifiers = { 1.87 + ACC_PUBLIC, ACC_FINAL, ACC_ABSTRACT 1.88 + }; 1.89 + 1.90 + private static final int[] classFlags = { 1.91 + ACC_PUBLIC, ACC_FINAL, ACC_SUPER, ACC_INTERFACE, ACC_ABSTRACT, 1.92 + ACC_SYNTHETIC, ACC_ANNOTATION, ACC_ENUM 1.93 + }; 1.94 + 1.95 + public Set<String> getClassModifiers() { 1.96 + int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags); 1.97 + return getModifiers(f, classModifiers, Kind.Class); 1.98 + } 1.99 + 1.100 + public Set<String> getClassFlags() { 1.101 + return getFlags(classFlags, Kind.Class); 1.102 + } 1.103 + 1.104 + private static final int[] innerClassModifiers = { 1.105 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, 1.106 + ACC_ABSTRACT 1.107 + }; 1.108 + 1.109 + private static final int[] innerClassFlags = { 1.110 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, ACC_SUPER, 1.111 + ACC_INTERFACE, ACC_ABSTRACT, ACC_SYNTHETIC, ACC_ANNOTATION, ACC_ENUM 1.112 + }; 1.113 + 1.114 + public Set<String> getInnerClassModifiers() { 1.115 + int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags); 1.116 + return getModifiers(f, innerClassModifiers, Kind.InnerClass); 1.117 + } 1.118 + 1.119 + public Set<String> getInnerClassFlags() { 1.120 + return getFlags(innerClassFlags, Kind.InnerClass); 1.121 + } 1.122 + 1.123 + private static final int[] fieldModifiers = { 1.124 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, 1.125 + ACC_VOLATILE, ACC_TRANSIENT 1.126 + }; 1.127 + 1.128 + private static final int[] fieldFlags = { 1.129 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, 1.130 + ACC_VOLATILE, ACC_TRANSIENT, ACC_SYNTHETIC, ACC_ENUM 1.131 + }; 1.132 + 1.133 + public Set<String> getFieldModifiers() { 1.134 + return getModifiers(fieldModifiers, Kind.Field); 1.135 + } 1.136 + 1.137 + public Set<String> getFieldFlags() { 1.138 + return getFlags(fieldFlags, Kind.Field); 1.139 + } 1.140 + 1.141 + private static final int[] methodModifiers = { 1.142 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, 1.143 + ACC_SYNCHRONIZED, ACC_NATIVE, ACC_ABSTRACT, ACC_STRICT 1.144 + }; 1.145 + 1.146 + private static final int[] methodFlags = { 1.147 + ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, 1.148 + ACC_SYNCHRONIZED, ACC_BRIDGE, ACC_VARARGS, ACC_NATIVE, ACC_ABSTRACT, 1.149 + ACC_STRICT, ACC_SYNTHETIC 1.150 + }; 1.151 + 1.152 + public Set<String> getMethodModifiers() { 1.153 + return getModifiers(methodModifiers, Kind.Method); 1.154 + } 1.155 + 1.156 + public Set<String> getMethodFlags() { 1.157 + return getFlags(methodFlags, Kind.Method); 1.158 + } 1.159 + 1.160 + private Set<String> getModifiers(int[] modifierFlags, Kind t) { 1.161 + return getModifiers(flags, modifierFlags, t); 1.162 + } 1.163 + 1.164 + private static Set<String> getModifiers(int flags, int[] modifierFlags, Kind t) { 1.165 + Set<String> s = new LinkedHashSet<String>(); 1.166 + for (int m: modifierFlags) { 1.167 + if ((flags & m) != 0) 1.168 + s.add(flagToModifier(m, t)); 1.169 + } 1.170 + return s; 1.171 + } 1.172 + 1.173 + private Set<String> getFlags(int[] expectedFlags, Kind t) { 1.174 + Set<String> s = new LinkedHashSet<String>(); 1.175 + int f = flags; 1.176 + for (int e: expectedFlags) { 1.177 + if ((f & e) != 0) { 1.178 + s.add(flagToName(e, t)); 1.179 + f = f & ~e; 1.180 + } 1.181 + } 1.182 + while (f != 0) { 1.183 + int bit = Integer.highestOneBit(f); 1.184 + s.add("0x" + Integer.toHexString(bit)); 1.185 + f = f & ~bit; 1.186 + } 1.187 + return s; 1.188 + } 1.189 + 1.190 + private static String flagToModifier(int flag, Kind t) { 1.191 + switch (flag) { 1.192 + case ACC_PUBLIC: 1.193 + return "public"; 1.194 + case ACC_PRIVATE: 1.195 + return "private"; 1.196 + case ACC_PROTECTED: 1.197 + return "protected"; 1.198 + case ACC_STATIC: 1.199 + return "static"; 1.200 + case ACC_FINAL: 1.201 + return "final"; 1.202 + case ACC_SYNCHRONIZED: 1.203 + return "synchronized"; 1.204 + case 0x80: 1.205 + return (t == Kind.Field ? "transient" : null); 1.206 + case ACC_VOLATILE: 1.207 + return "volatile"; 1.208 + case ACC_NATIVE: 1.209 + return "native"; 1.210 + case ACC_ABSTRACT: 1.211 + return "abstract"; 1.212 + case ACC_STRICT: 1.213 + return "strictfp"; 1.214 + case ACC_MANDATED: 1.215 + return "mandated"; 1.216 + default: 1.217 + return null; 1.218 + } 1.219 + } 1.220 + 1.221 + private static String flagToName(int flag, Kind t) { 1.222 + switch (flag) { 1.223 + case ACC_PUBLIC: 1.224 + return "ACC_PUBLIC"; 1.225 + case ACC_PRIVATE: 1.226 + return "ACC_PRIVATE"; 1.227 + case ACC_PROTECTED: 1.228 + return "ACC_PROTECTED"; 1.229 + case ACC_STATIC: 1.230 + return "ACC_STATIC"; 1.231 + case ACC_FINAL: 1.232 + return "ACC_FINAL"; 1.233 + case 0x20: 1.234 + return (t == Kind.Class ? "ACC_SUPER" : "ACC_SYNCHRONIZED"); 1.235 + case 0x40: 1.236 + return (t == Kind.Field ? "ACC_VOLATILE" : "ACC_BRIDGE"); 1.237 + case 0x80: 1.238 + return (t == Kind.Field ? "ACC_TRANSIENT" : "ACC_VARARGS"); 1.239 + case ACC_NATIVE: 1.240 + return "ACC_NATIVE"; 1.241 + case ACC_INTERFACE: 1.242 + return "ACC_INTERFACE"; 1.243 + case ACC_ABSTRACT: 1.244 + return "ACC_ABSTRACT"; 1.245 + case ACC_STRICT: 1.246 + return "ACC_STRICT"; 1.247 + case ACC_SYNTHETIC: 1.248 + return "ACC_SYNTHETIC"; 1.249 + case ACC_ANNOTATION: 1.250 + return "ACC_ANNOTATION"; 1.251 + case ACC_ENUM: 1.252 + return "ACC_ENUM"; 1.253 + case ACC_MANDATED: 1.254 + return "ACC_MANDATED"; 1.255 + default: 1.256 + return null; 1.257 + } 1.258 + } 1.259 + 1.260 + public final int flags; 1.261 +}