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: /**
jjg@46: * See JVMS3, 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: }