jjg@46: /* ohair@554: * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved. jjg@46: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. jjg@46: * jjg@46: * This code is free software; you can redistribute it and/or modify it jjg@46: * under the terms of the GNU General Public License version 2 only, as ohair@554: * published by the Free Software Foundation. Oracle designates this jjg@46: * particular file as subject to the "Classpath" exception as provided ohair@554: * by Oracle in the LICENSE file that accompanied this code. jjg@46: * jjg@46: * This code is distributed in the hope that it will be useful, but WITHOUT jjg@46: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or jjg@46: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License jjg@46: * version 2 for more details (a copy is included in the LICENSE file that jjg@46: * accompanied this code). jjg@46: * jjg@46: * You should have received a copy of the GNU General Public License version jjg@46: * 2 along with this work; if not, write to the Free Software Foundation, jjg@46: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. jjg@46: * ohair@554: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA ohair@554: * or visit www.oracle.com if you need additional information or have any ohair@554: * questions. jjg@46: */ jjg@46: jjg@46: package com.sun.tools.classfile; jjg@46: jjg@46: import java.io.IOException; jjg@46: import java.util.LinkedHashSet; jjg@46: import java.util.Set; jjg@46: jjg@46: /** jjh@972: * See JVMS, sections 4.2, 4.6, 4.7. jjg@46: * jjg@581: *

This is NOT part of any supported API. jjg@581: * If you write code that depends on this, you do so at your own risk. jjg@46: * This code and its internal interfaces are subject to change or jjg@46: * deletion without notice. jjg@46: */ jjg@46: public class AccessFlags { jjg@46: public static final int ACC_PUBLIC = 0x0001; // class, inner, field, method jjg@46: public static final int ACC_PRIVATE = 0x0002; // inner, field, method jjg@46: public static final int ACC_PROTECTED = 0x0004; // inner, field, method jjg@46: public static final int ACC_STATIC = 0x0008; // inner, field, method jjg@46: public static final int ACC_FINAL = 0x0010; // class, inner, field, method jjg@46: public static final int ACC_SUPER = 0x0020; // class jjg@46: public static final int ACC_SYNCHRONIZED = 0x0020; // method jjg@46: public static final int ACC_VOLATILE = 0x0040; // field jjg@46: public static final int ACC_BRIDGE = 0x0040; // method jjg@46: public static final int ACC_TRANSIENT = 0x0080; // field jjg@46: public static final int ACC_VARARGS = 0x0080; // method jjg@46: public static final int ACC_NATIVE = 0x0100; // method jjg@46: public static final int ACC_INTERFACE = 0x0200; // class, inner jjg@46: public static final int ACC_ABSTRACT = 0x0400; // class, inner, method jjg@46: public static final int ACC_STRICT = 0x0800; // method jjg@46: public static final int ACC_SYNTHETIC = 0x1000; // class, inner, field, method jjg@46: public static final int ACC_ANNOTATION = 0x2000; // class, inner jjg@46: public static final int ACC_ENUM = 0x4000; // class, inner, field jjg@46: public static final int ACC_MODULE = 0x8000; // class, inner, field, method jjg@46: jjg@300: public static enum Kind { Class, InnerClass, Field, Method}; jjg@46: jjg@46: AccessFlags(ClassReader cr) throws IOException { jjg@46: this(cr.readUnsignedShort()); jjg@46: } jjg@46: jjg@46: public AccessFlags(int flags) { jjg@46: this.flags = flags; jjg@46: } jjg@46: jjg@46: public AccessFlags ignore(int mask) { jjg@46: return new AccessFlags(flags & ~mask); jjg@46: } jjg@46: jjg@46: public boolean is(int mask) { jjg@46: return (flags & mask) != 0; jjg@46: } jjg@46: jjg@345: public int byteLength() { jjg@345: return 2; jjg@345: } jjg@345: jjg@46: private static final int[] classModifiers = { jjg@46: ACC_PUBLIC, ACC_FINAL, ACC_ABSTRACT, ACC_MODULE jjg@46: }; jjg@46: jjg@46: private static final int[] classFlags = { jjg@46: ACC_PUBLIC, ACC_FINAL, ACC_SUPER, ACC_INTERFACE, ACC_ABSTRACT, jjg@46: ACC_SYNTHETIC, ACC_ANNOTATION, ACC_ENUM, ACC_MODULE jjg@46: }; jjg@46: jjg@46: public Set getClassModifiers() { jjg@46: int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags); jjg@300: return getModifiers(f, classModifiers, Kind.Class); jjg@46: } jjg@46: jjg@46: public Set getClassFlags() { jjg@300: return getFlags(classFlags, Kind.Class); jjg@46: } jjg@46: jjg@46: private static final int[] innerClassModifiers = { jjg@46: ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, jjg@46: ACC_ABSTRACT, ACC_MODULE jjg@46: }; jjg@46: jjg@46: private static final int[] innerClassFlags = { jjg@46: ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, ACC_SUPER, jjg@46: ACC_INTERFACE, ACC_ABSTRACT, ACC_SYNTHETIC, ACC_ANNOTATION, ACC_ENUM, ACC_MODULE jjg@46: }; jjg@46: jjg@46: public Set getInnerClassModifiers() { jjg@46: int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags); jjg@300: return getModifiers(f, innerClassModifiers, Kind.InnerClass); jjg@46: } jjg@46: jjg@46: public Set getInnerClassFlags() { jjg@300: return getFlags(innerClassFlags, Kind.InnerClass); jjg@46: } jjg@46: jjg@46: private static final int[] fieldModifiers = { jjg@46: ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, jjg@46: ACC_VOLATILE, ACC_TRANSIENT, ACC_MODULE jjg@46: }; jjg@46: jjg@46: private static final int[] fieldFlags = { jjg@46: ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, jjg@46: ACC_VOLATILE, ACC_TRANSIENT, ACC_SYNTHETIC, ACC_ENUM, ACC_MODULE jjg@46: }; jjg@46: jjg@46: public Set getFieldModifiers() { jjg@300: return getModifiers(fieldModifiers, Kind.Field); jjg@46: } jjg@46: jjg@46: public Set getFieldFlags() { jjg@300: return getFlags(fieldFlags, Kind.Field); jjg@46: } jjg@46: jjg@46: private static final int[] methodModifiers = { jjg@46: ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, jjg@46: ACC_SYNCHRONIZED, ACC_NATIVE, ACC_ABSTRACT, ACC_STRICT, ACC_MODULE jjg@46: }; jjg@46: jjg@46: private static final int[] methodFlags = { jjg@46: ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL, jjg@46: ACC_SYNCHRONIZED, ACC_BRIDGE, ACC_VARARGS, ACC_NATIVE, ACC_ABSTRACT, jjg@46: ACC_STRICT, ACC_SYNTHETIC, ACC_MODULE jjg@46: }; jjg@46: jjg@46: public Set getMethodModifiers() { jjg@300: return getModifiers(methodModifiers, Kind.Method); jjg@46: } jjg@46: jjg@46: public Set getMethodFlags() { jjg@300: return getFlags(methodFlags, Kind.Method); jjg@46: } jjg@46: jjg@300: private Set getModifiers(int[] modifierFlags, Kind t) { jjg@46: return getModifiers(flags, modifierFlags, t); jjg@46: } jjg@46: jjg@300: private static Set getModifiers(int flags, int[] modifierFlags, Kind t) { jjg@46: Set s = new LinkedHashSet(); jjg@46: for (int m: modifierFlags) { jjg@46: if ((flags & m) != 0) jjg@46: s.add(flagToModifier(m, t)); jjg@46: } jjg@46: return s; jjg@46: } jjg@46: jjg@300: private Set getFlags(int[] expectedFlags, Kind t) { jjg@46: Set s = new LinkedHashSet(); jjg@46: int f = flags; jjg@46: for (int e: expectedFlags) { jjg@46: if ((f & e) != 0) { jjg@46: s.add(flagToName(e, t)); jjg@46: f = f & ~e; jjg@46: } jjg@46: } jjg@46: while (f != 0) { jjg@46: int bit = Integer.highestOneBit(f); jjg@46: s.add("0x" + Integer.toHexString(bit)); jjg@46: f = f & ~bit; jjg@46: } jjg@46: return s; jjg@46: } jjg@46: jjg@300: private static String flagToModifier(int flag, Kind t) { jjg@46: switch (flag) { jjg@46: case ACC_PUBLIC: jjg@46: return "public"; jjg@46: case ACC_PRIVATE: jjg@46: return "private"; jjg@46: case ACC_PROTECTED: jjg@46: return "protected"; jjg@46: case ACC_STATIC: jjg@46: return "static"; jjg@46: case ACC_FINAL: jjg@46: return "final"; jjg@46: case ACC_SYNCHRONIZED: jjg@46: return "synchronized"; jjg@46: case 0x80: jjg@300: return (t == Kind.Field ? "transient" : null); jjg@46: case ACC_VOLATILE: jjg@46: return "volatile"; jjg@46: case ACC_NATIVE: jjg@46: return "native"; jjg@46: case ACC_ABSTRACT: jjg@46: return "abstract"; jjg@46: case ACC_STRICT: jjg@46: return "strictfp"; jjg@46: case ACC_MODULE: jjg@46: return "module"; jjg@46: default: jjg@46: return null; jjg@46: } jjg@46: } jjg@46: jjg@300: private static String flagToName(int flag, Kind t) { jjg@46: switch (flag) { jjg@46: case ACC_PUBLIC: jjg@46: return "ACC_PUBLIC"; jjg@46: case ACC_PRIVATE: jjg@46: return "ACC_PRIVATE"; jjg@46: case ACC_PROTECTED: jjg@46: return "ACC_PROTECTED"; jjg@46: case ACC_STATIC: jjg@46: return "ACC_STATIC"; jjg@46: case ACC_FINAL: jjg@46: return "ACC_FINAL"; jjg@46: case 0x20: jjg@300: return (t == Kind.Class ? "ACC_SUPER" : "ACC_SYNCHRONIZED"); jjg@46: case 0x40: jjg@300: return (t == Kind.Field ? "ACC_VOLATILE" : "ACC_BRIDGE"); jjg@46: case 0x80: jjg@300: return (t == Kind.Field ? "ACC_TRANSIENT" : "ACC_VARARGS"); jjg@46: case ACC_NATIVE: jjg@46: return "ACC_NATIVE"; jjg@46: case ACC_INTERFACE: jjg@46: return "ACC_INTERFACE"; jjg@46: case ACC_ABSTRACT: jjg@46: return "ACC_ABSTRACT"; jjg@46: case ACC_STRICT: jjg@46: return "ACC_STRICT"; jjg@46: case ACC_SYNTHETIC: jjg@46: return "ACC_SYNTHETIC"; jjg@46: case ACC_ANNOTATION: jjg@46: return "ACC_ANNOTATION"; jjg@46: case ACC_ENUM: jjg@46: return "ACC_ENUM"; jjg@46: case ACC_MODULE: jjg@46: return "ACC_MODULE"; jjg@46: default: jjg@46: return null; jjg@46: } jjg@46: } jjg@46: jjg@300: public final int flags; jjg@46: }