--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/lang/reflect/Modifier.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,357 @@
+/*
+ * Copyright 1996-2004 Sun Microsystems, Inc. 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. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.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 <a
+ * href="http://java.sun.com/docs/books/vmspec/2nd-edition/html/VMSpecTOC.doc.html"><i>The
+ * Java</i><sup><small>TM</small></sup> <i>Virtual Machine Specification, Second
+ * edition</i></a> tables
+ * <a href="http://java.sun.com/docs/books/vmspec/2nd-edition/html/ClassFile.doc.html#75734">4.1</a>,
+ * <a href="http://java.sun.com/docs/books/vmspec/2nd-edition/html/ClassFile.doc.html#88358">4.4</a>,
+ * <a href="http://java.sun.com/docs/books/vmspec/2nd-edition/html/ClassFile.doc.html#75568">4.5</a>, and
+ * <a href="http://java.sun.com/docs/books/vmspec/2nd-edition/html/ClassFile.doc.html#88478">4.7</a>.
+ *
+ * @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 =
+ (sun.reflect.ReflectionFactory) 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 <a
+ * href="http://java.sun.com/docs/books/jls/second_edition/html/j.title.doc.html"><em>The
+ * Java Language Specification, Second Edition</em></a> sections
+ * <a href="http://java.sun.com/docs/books/jls/second_edition/html/classes.doc.html#21613">§8.1.1</a>,
+ * <a href="http://java.sun.com/docs/books/jls/second_edition/html/classes.doc.html#78091">§8.3.1</a>,
+ * <a href="http://java.sun.com/docs/books/jls/second_edition/html/classes.doc.html#78188">§8.4.3</a>,
+ * <a href="http://java.sun.com/docs/books/jls/second_edition/html/classes.doc.html#42018">§8.8.3</a>, and
+ * <a href="http://java.sun.com/docs/books/jls/second_edition/html/interfaces.doc.html#235947">§9.1.1</a>.
+ * 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.
+ *
+ * @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 <em>The Java Virtual
+ * Machine Specification, Second Edition</em>, tables 4.1, 4.4,
+ * 4.5, and 4.7.
+ */
+
+ /**
+ * 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;
+ }
+}