diff -r 000000000000 -r 959103a6100f src/share/classes/com/sun/tools/classfile/AccessFlags.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/classes/com/sun/tools/classfile/AccessFlags.java Wed Apr 27 01:34:52 2016 +0800 @@ -0,0 +1,258 @@ +/* + * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package com.sun.tools.classfile; + +import java.io.IOException; +import java.util.LinkedHashSet; +import java.util.Set; + +/** + * See JVMS, sections 4.2, 4.6, 4.7. + * + *

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