aoqi@0: /* aoqi@0: * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved. aoqi@0: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. aoqi@0: * aoqi@0: * This code is free software; you can redistribute it and/or modify it aoqi@0: * under the terms of the GNU General Public License version 2 only, as aoqi@0: * published by the Free Software Foundation. Oracle designates this aoqi@0: * particular file as subject to the "Classpath" exception as provided aoqi@0: * by Oracle in the LICENSE file that accompanied this code. aoqi@0: * aoqi@0: * This code is distributed in the hope that it will be useful, but WITHOUT aoqi@0: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or aoqi@0: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License aoqi@0: * version 2 for more details (a copy is included in the LICENSE file that aoqi@0: * accompanied this code). aoqi@0: * aoqi@0: * You should have received a copy of the GNU General Public License version aoqi@0: * 2 along with this work; if not, write to the Free Software Foundation, aoqi@0: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. aoqi@0: * aoqi@0: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA aoqi@0: * or visit www.oracle.com if you need additional information or have any aoqi@0: * questions. aoqi@0: */ aoqi@0: aoqi@0: package com.sun.tools.classfile; aoqi@0: aoqi@0: import java.io.IOException; aoqi@0: import java.util.LinkedHashSet; aoqi@0: import java.util.Set; aoqi@0: aoqi@0: /** aoqi@0: * See JVMS, sections 4.2, 4.6, 4.7. aoqi@0: * aoqi@0: *

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