| /* |
| * Copyright (c) 2007, 2015, 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. |
| * |
| * <p><b>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.</b> |
| */ |
| 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; // method parameter |
| public static final int ACC_MODULE = 0x8000; // class |
| |
| 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, ACC_MODULE |
| }; |
| |
| public Set<String> getClassModifiers() { |
| int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags); |
| return getModifiers(f, classModifiers, Kind.Class); |
| } |
| |
| public Set<String> 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<String> getInnerClassModifiers() { |
| int f = ((flags & ACC_INTERFACE) != 0 ? flags & ~ACC_ABSTRACT : flags); |
| return getModifiers(f, innerClassModifiers, Kind.InnerClass); |
| } |
| |
| public Set<String> 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<String> getFieldModifiers() { |
| return getModifiers(fieldModifiers, Kind.Field); |
| } |
| |
| public Set<String> 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<String> getMethodModifiers() { |
| return getModifiers(methodModifiers, Kind.Method); |
| } |
| |
| public Set<String> getMethodFlags() { |
| return getFlags(methodFlags, Kind.Method); |
| } |
| |
| private Set<String> getModifiers(int[] modifierFlags, Kind t) { |
| return getModifiers(flags, modifierFlags, t); |
| } |
| |
| private static Set<String> getModifiers(int flags, int[] modifierFlags, Kind t) { |
| Set<String> s = new LinkedHashSet<>(); |
| for (int m: modifierFlags) { |
| if ((flags & m) != 0) |
| s.add(flagToModifier(m, t)); |
| } |
| return s; |
| } |
| |
| private Set<String> getFlags(int[] expectedFlags, Kind t) { |
| Set<String> 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 0x8000: |
| return (t == Kind.Class ? "ACC_MODULE" : "ACC_MANDATED"); |
| default: |
| return null; |
| } |
| } |
| |
| public final int flags; |
| } |