--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/lang/reflect/Modifier.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,494 @@
+/*
+ * Copyright (c) 1996, 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 java.lang.reflect;
+
+import java.security.AccessController;
+import java.util.StringJoiner;
+import jdk.internal.reflect.LangReflectAccess;
+import jdk.internal.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
+ * <cite>The Java™ Virtual Machine Specification</cite>.
+ *
+ * @see Class#getModifiers()
+ * @see Member#getModifiers()
+ *
+ * @author Nakul Saraiya
+ * @author Kenneth Russell
+ * @since 1.1
+ */
+public class Modifier {
+
+ /*
+ * Bootstrapping protocol between java.lang and java.lang.reflect
+ * packages
+ */
+ static {
+ 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:
+ * <blockquote><pre>
+ * public final synchronized strictfp
+ * </pre></blockquote>
+ * 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
+ * <cite>The Java™ Language Specification</cite>.
+ * The full modifier ordering used by this method is:
+ * <blockquote> {@code
+ * public protected private abstract static final transient
+ * volatile synchronized native strictfp
+ * interface } </blockquote>
+ * 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) {
+ StringJoiner sj = new StringJoiner(" ");
+
+ if ((mod & PUBLIC) != 0) sj.add("public");
+ if ((mod & PROTECTED) != 0) sj.add("protected");
+ if ((mod & PRIVATE) != 0) sj.add("private");
+
+ /* Canonical order */
+ if ((mod & ABSTRACT) != 0) sj.add("abstract");
+ if ((mod & STATIC) != 0) sj.add("static");
+ if ((mod & FINAL) != 0) sj.add("final");
+ if ((mod & TRANSIENT) != 0) sj.add("transient");
+ if ((mod & VOLATILE) != 0) sj.add("volatile");
+ if ((mod & SYNCHRONIZED) != 0) sj.add("synchronized");
+ if ((mod & NATIVE) != 0) sj.add("native");
+ if ((mod & STRICT) != 0) sj.add("strictfp");
+ if ((mod & INTERFACE) != 0) sj.add("interface");
+
+ return sj.toString();
+ }
+
+ /*
+ * Access modifier flag constants from tables 4.1, 4.4, 4.5, and 4.7 of
+ * <cite>The Java™ Virtual Machine Specification</cite>
+ */
+
+ /**
+ * 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 final int MANDATED = 0x00008000;
+ static boolean isSynthetic(int mod) {
+ return (mod & SYNTHETIC) != 0;
+ }
+
+ static boolean isMandated(int mod) {
+ return (mod & MANDATED) != 0;
+ }
+
+ // Note on the FOO_MODIFIERS fields and fooModifiers() methods:
+ // the sets of modifiers are not guaranteed to be constants
+ // across time and Java SE releases. Therefore, it would not be
+ // appropriate to expose an external interface to this information
+ // that would allow the values to be treated as Java-level
+ // constants since the values could be constant folded and updates
+ // to the sets of modifiers missed. Thus, the fooModifiers()
+ // methods return an unchanging values for a given release, but a
+ // value that can potentially change over time.
+
+ /**
+ * The Java source modifiers that can be applied to a class.
+ * @jls 8.1.1 Class Modifiers
+ */
+ private static final int CLASS_MODIFIERS =
+ Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE |
+ Modifier.ABSTRACT | Modifier.STATIC | Modifier.FINAL |
+ Modifier.STRICT;
+
+ /**
+ * The Java source modifiers that can be applied to an interface.
+ * @jls 9.1.1 Interface Modifiers
+ */
+ private static final int INTERFACE_MODIFIERS =
+ Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE |
+ Modifier.ABSTRACT | Modifier.STATIC | Modifier.STRICT;
+
+
+ /**
+ * The Java source modifiers that can be applied to a constructor.
+ * @jls 8.8.3 Constructor Modifiers
+ */
+ private static final int CONSTRUCTOR_MODIFIERS =
+ Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE;
+
+ /**
+ * The Java source modifiers that can be applied to a method.
+ * @jls8.4.3 Method Modifiers
+ */
+ private static final int METHOD_MODIFIERS =
+ Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE |
+ Modifier.ABSTRACT | Modifier.STATIC | Modifier.FINAL |
+ Modifier.SYNCHRONIZED | Modifier.NATIVE | Modifier.STRICT;
+
+ /**
+ * The Java source modifiers that can be applied to a field.
+ * @jls 8.3.1 Field Modifiers
+ */
+ private static final int FIELD_MODIFIERS =
+ Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE |
+ Modifier.STATIC | Modifier.FINAL | Modifier.TRANSIENT |
+ Modifier.VOLATILE;
+
+ /**
+ * The Java source modifiers that can be applied to a method or constructor parameter.
+ * @jls 8.4.1 Formal Parameters
+ */
+ private static final int PARAMETER_MODIFIERS =
+ Modifier.FINAL;
+
+ /**
+ *
+ */
+ static final int ACCESS_MODIFIERS =
+ Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE;
+
+ /**
+ * 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 interface.
+ *
+ * @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;
+ }
+
+ /**
+ * Return an {@code int} value OR-ing together the source language
+ * modifiers that can be applied to a parameter.
+ * @return an {@code int} value OR-ing together the source language
+ * modifiers that can be applied to a parameter.
+ *
+ * @jls 8.4.1 Formal Parameters
+ * @since 1.8
+ */
+ public static int parameterModifiers() {
+ return PARAMETER_MODIFIERS;
+ }
+}