diff -r 000000000000 -r 21b390daf444 emul/src/main/java/java/lang/reflect/Modifier.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/emul/src/main/java/java/lang/reflect/Modifier.java Tue Dec 04 13:29:17 2012 +0100 @@ -0,0 +1,452 @@ +/* + * Copyright (c) 1996, 2008, 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 java.lang.reflect; + +import java.security.AccessController; +import sun.reflect.LangReflectAccess; +import sun.reflect.ReflectionFactory; + +/** + * The Modifier class provides {@code static} methods and + * constants to decode class and member access modifiers. The sets of + * modifiers are represented as integers with distinct bit positions + * representing different modifiers. The values for the constants + * representing the modifiers are taken from the tables in sections 4.1, 4.4, 4.5, and 4.7 of + * The Java™ Virtual Machine Specification. + * + * @see Class#getModifiers() + * @see Member#getModifiers() + * + * @author Nakul Saraiya + * @author Kenneth Russell + */ +public +class Modifier { + + /* + * Bootstrapping protocol between java.lang and java.lang.reflect + * packages + */ + static { + sun.reflect.ReflectionFactory factory = + AccessController.doPrivileged( + new ReflectionFactory.GetReflectionFactoryAction()); + factory.setLangReflectAccess(new java.lang.reflect.ReflectAccess()); + } + + /** + * Return {@code true} if the integer argument includes the + * {@code public} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code public} modifier; {@code false} otherwise. + */ + public static boolean isPublic(int mod) { + return (mod & PUBLIC) != 0; + } + + /** + * Return {@code true} if the integer argument includes the + * {@code private} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code private} modifier; {@code false} otherwise. + */ + public static boolean isPrivate(int mod) { + return (mod & PRIVATE) != 0; + } + + /** + * Return {@code true} if the integer argument includes the + * {@code protected} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code protected} modifier; {@code false} otherwise. + */ + public static boolean isProtected(int mod) { + return (mod & PROTECTED) != 0; + } + + /** + * Return {@code true} if the integer argument includes the + * {@code static} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code static} modifier; {@code false} otherwise. + */ + public static boolean isStatic(int mod) { + return (mod & STATIC) != 0; + } + + /** + * Return {@code true} if the integer argument includes the + * {@code final} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code final} modifier; {@code false} otherwise. + */ + public static boolean isFinal(int mod) { + return (mod & FINAL) != 0; + } + + /** + * Return {@code true} if the integer argument includes the + * {@code synchronized} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code synchronized} modifier; {@code false} otherwise. + */ + public static boolean isSynchronized(int mod) { + return (mod & SYNCHRONIZED) != 0; + } + + /** + * Return {@code true} if the integer argument includes the + * {@code volatile} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code volatile} modifier; {@code false} otherwise. + */ + public static boolean isVolatile(int mod) { + return (mod & VOLATILE) != 0; + } + + /** + * Return {@code true} if the integer argument includes the + * {@code transient} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code transient} modifier; {@code false} otherwise. + */ + public static boolean isTransient(int mod) { + return (mod & TRANSIENT) != 0; + } + + /** + * Return {@code true} if the integer argument includes the + * {@code native} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code native} modifier; {@code false} otherwise. + */ + public static boolean isNative(int mod) { + return (mod & NATIVE) != 0; + } + + /** + * Return {@code true} if the integer argument includes the + * {@code interface} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code interface} modifier; {@code false} otherwise. + */ + public static boolean isInterface(int mod) { + return (mod & INTERFACE) != 0; + } + + /** + * Return {@code true} if the integer argument includes the + * {@code abstract} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code abstract} modifier; {@code false} otherwise. + */ + public static boolean isAbstract(int mod) { + return (mod & ABSTRACT) != 0; + } + + /** + * Return {@code true} if the integer argument includes the + * {@code strictfp} modifier, {@code false} otherwise. + * + * @param mod a set of modifiers + * @return {@code true} if {@code mod} includes the + * {@code strictfp} modifier; {@code false} otherwise. + */ + public static boolean isStrict(int mod) { + return (mod & STRICT) != 0; + } + + /** + * Return a string describing the access modifier flags in + * the specified modifier. For example: + * 
+     *    public final synchronized strictfp
+     *
+ * The modifier names are returned in an order consistent with the + * suggested modifier orderings given in sections 8.1.1, 8.3.1, 8.4.3, 8.8.3, and 9.1.1 of + * The Java™ Language Specification. + * The full modifier ordering used by this method is: + *
{@code + * public protected private abstract static final transient + * volatile synchronized native strictfp + * interface }
+ * The {@code interface} modifier discussed in this class is + * not a true modifier in the Java language and it appears after + * all other modifiers listed by this method. This method may + * return a string of modifiers that are not valid modifiers of a + * Java entity; in other words, no checking is done on the + * possible validity of the combination of modifiers represented + * by the input. + * + * Note that to perform such checking for a known kind of entity, + * such as a constructor or method, first AND the argument of + * {@code toString} with the appropriate mask from a method like + * {@link #constructorModifiers} or {@link #methodModifiers}. + * + * @param mod a set of modifiers + * @return a string representation of the set of modifiers + * represented by {@code mod} + */ + public static String toString(int mod) { + StringBuffer sb = new StringBuffer(); + int len; + + if ((mod & PUBLIC) != 0) sb.append("public "); + if ((mod & PROTECTED) != 0) sb.append("protected "); + if ((mod & PRIVATE) != 0) sb.append("private "); + + /* Canonical order */ + if ((mod & ABSTRACT) != 0) sb.append("abstract "); + if ((mod & STATIC) != 0) sb.append("static "); + if ((mod & FINAL) != 0) sb.append("final "); + if ((mod & TRANSIENT) != 0) sb.append("transient "); + if ((mod & VOLATILE) != 0) sb.append("volatile "); + if ((mod & SYNCHRONIZED) != 0) sb.append("synchronized "); + if ((mod & NATIVE) != 0) sb.append("native "); + if ((mod & STRICT) != 0) sb.append("strictfp "); + if ((mod & INTERFACE) != 0) sb.append("interface "); + + if ((len = sb.length()) > 0) /* trim trailing space */ + return sb.toString().substring(0, len-1); + return ""; + } + + /* + * Access modifier flag constants from tables 4.1, 4.4, 4.5, and 4.7 of + * The Java™ Virtual Machine Specification + */ + + /** + * The {@code int} value representing the {@code public} + * modifier. + */ + public static final int PUBLIC = 0x00000001; + + /** + * The {@code int} value representing the {@code private} + * modifier. + */ + public static final int PRIVATE = 0x00000002; + + /** + * The {@code int} value representing the {@code protected} + * modifier. + */ + public static final int PROTECTED = 0x00000004; + + /** + * The {@code int} value representing the {@code static} + * modifier. + */ + public static final int STATIC = 0x00000008; + + /** + * The {@code int} value representing the {@code final} + * modifier. + */ + public static final int FINAL = 0x00000010; + + /** + * The {@code int} value representing the {@code synchronized} + * modifier. + */ + public static final int SYNCHRONIZED = 0x00000020; + + /** + * The {@code int} value representing the {@code volatile} + * modifier. + */ + public static final int VOLATILE = 0x00000040; + + /** + * The {@code int} value representing the {@code transient} + * modifier. + */ + public static final int TRANSIENT = 0x00000080; + + /** + * The {@code int} value representing the {@code native} + * modifier. + */ + public static final int NATIVE = 0x00000100; + + /** + * The {@code int} value representing the {@code interface} + * modifier. + */ + public static final int INTERFACE = 0x00000200; + + /** + * The {@code int} value representing the {@code abstract} + * modifier. + */ + public static final int ABSTRACT = 0x00000400; + + /** + * The {@code int} value representing the {@code strictfp} + * modifier. + */ + public static final int STRICT = 0x00000800; + + // Bits not (yet) exposed in the public API either because they + // have different meanings for fields and methods and there is no + // way to distinguish between the two in this class, or because + // they are not Java programming language keywords + static final int BRIDGE = 0x00000040; + static final int VARARGS = 0x00000080; + static final int SYNTHETIC = 0x00001000; + static final int ANNOTATION= 0x00002000; + static final int ENUM = 0x00004000; + static boolean isSynthetic(int mod) { + return (mod & SYNTHETIC) != 0; + } + + /** + * See JLSv3 section 8.1.1. + */ + private static final int CLASS_MODIFIERS = + Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE | + Modifier.ABSTRACT | Modifier.STATIC | Modifier.FINAL | + Modifier.STRICT; + + /** + * See JLSv3 section 9.1.1. + */ + private static final int INTERFACE_MODIFIERS = + Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE | + Modifier.ABSTRACT | Modifier.STATIC | Modifier.STRICT; + + + /** + * See JLSv3 section 8.8.3. + */ + private static final int CONSTRUCTOR_MODIFIERS = + Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE; + + /** + * See JLSv3 section 8.4.3. + */ + private static final int METHOD_MODIFIERS = + Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE | + Modifier.ABSTRACT | Modifier.STATIC | Modifier.FINAL | + Modifier.SYNCHRONIZED | Modifier.NATIVE | Modifier.STRICT; + + /** + * See JLSv3 section 8.3.1. + */ + private static final int FIELD_MODIFIERS = + Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE | + Modifier.STATIC | Modifier.FINAL | Modifier.TRANSIENT | + Modifier.VOLATILE; + + /** + * Return an {@code int} value OR-ing together the source language + * modifiers that can be applied to a class. + * @return an {@code int} value OR-ing together the source language + * modifiers that can be applied to a class. + * + * @jls 8.1.1 Class Modifiers + * @since 1.7 + */ + public static int classModifiers() { + return CLASS_MODIFIERS; + } + + /** + * Return an {@code int} value OR-ing together the source language + * modifiers that can be applied to an interface. + * @return an {@code int} value OR-ing together the source language + * modifiers that can be applied to an inteface. + * + * @jls 9.1.1 Interface Modifiers + * @since 1.7 + */ + public static int interfaceModifiers() { + return INTERFACE_MODIFIERS; + } + + /** + * Return an {@code int} value OR-ing together the source language + * modifiers that can be applied to a constructor. + * @return an {@code int} value OR-ing together the source language + * modifiers that can be applied to a constructor. + * + * @jls 8.8.3 Constructor Modifiers + * @since 1.7 + */ + public static int constructorModifiers() { + return CONSTRUCTOR_MODIFIERS; + } + + /** + * Return an {@code int} value OR-ing together the source language + * modifiers that can be applied to a method. + * @return an {@code int} value OR-ing together the source language + * modifiers that can be applied to a method. + * + * @jls 8.4.3 Method Modifiers + * @since 1.7 + */ + public static int methodModifiers() { + return METHOD_MODIFIERS; + } + + + /** + * Return an {@code int} value OR-ing together the source language + * modifiers that can be applied to a field. + * @return an {@code int} value OR-ing together the source language + * modifiers that can be applied to a field. + * + * @jls 8.3.1 Field Modifiers + * @since 1.7 + */ + public static int fieldModifiers() { + return FIELD_MODIFIERS; + } +}