--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/share/classes/com/sun/tools/javac/code/Flags.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,274 @@
+/*
+ * Copyright 1999-2006 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 com.sun.tools.javac.code;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.Set;
+import javax.lang.model.element.Modifier;
+
+/** Access flags and other modifiers for Java classes and members.
+ *
+ * <p><b>This is NOT part of any API supported by Sun Microsystems. 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 Flags {
+
+ private Flags() {} // uninstantiable
+
+ public static String toString(long flags) {
+ StringBuffer buf = new StringBuffer();
+ if ((flags&PUBLIC) != 0) buf.append("public ");
+ if ((flags&PRIVATE) != 0) buf.append("private ");
+ if ((flags&PROTECTED) != 0) buf.append("protected ");
+ if ((flags&STATIC) != 0) buf.append("static ");
+ if ((flags&FINAL) != 0) buf.append("final ");
+ if ((flags&SYNCHRONIZED) != 0) buf.append("synchronized ");
+ if ((flags&VOLATILE) != 0) buf.append("volatile ");
+ if ((flags&TRANSIENT) != 0) buf.append("transient ");
+ if ((flags&NATIVE) != 0) buf.append("native ");
+ if ((flags&INTERFACE) != 0) buf.append("interface ");
+ if ((flags&ABSTRACT) != 0) buf.append("abstract ");
+ if ((flags&STRICTFP) != 0) buf.append("strictfp ");
+ if ((flags&BRIDGE) != 0) buf.append("bridge ");
+ if ((flags&SYNTHETIC) != 0) buf.append("synthetic ");
+ if ((flags&DEPRECATED) != 0) buf.append("deprecated ");
+ if ((flags&HASINIT) != 0) buf.append("hasinit ");
+ if ((flags&ENUM) != 0) buf.append("enum ");
+ if ((flags&IPROXY) != 0) buf.append("iproxy ");
+ if ((flags&NOOUTERTHIS) != 0) buf.append("noouterthis ");
+ if ((flags&EXISTS) != 0) buf.append("exists ");
+ if ((flags&COMPOUND) != 0) buf.append("compound ");
+ if ((flags&CLASS_SEEN) != 0) buf.append("class_seen ");
+ if ((flags&SOURCE_SEEN) != 0) buf.append("source_seen ");
+ if ((flags&LOCKED) != 0) buf.append("locked ");
+ if ((flags&UNATTRIBUTED) != 0) buf.append("unattributed ");
+ if ((flags&ANONCONSTR) != 0) buf.append("anonconstr ");
+ if ((flags&ACYCLIC) != 0) buf.append("acyclic ");
+ if ((flags&PARAMETER) != 0) buf.append("parameter ");
+ if ((flags&VARARGS) != 0) buf.append("varargs ");
+ return buf.toString();
+ }
+
+ /* Standard Java flags.
+ */
+ public static final int PUBLIC = 1<<0;
+ public static final int PRIVATE = 1<<1;
+ public static final int PROTECTED = 1<<2;
+ public static final int STATIC = 1<<3;
+ public static final int FINAL = 1<<4;
+ public static final int SYNCHRONIZED = 1<<5;
+ public static final int VOLATILE = 1<<6;
+ public static final int TRANSIENT = 1<<7;
+ public static final int NATIVE = 1<<8;
+ public static final int INTERFACE = 1<<9;
+ public static final int ABSTRACT = 1<<10;
+ public static final int STRICTFP = 1<<11;
+
+ /* Flag that marks a symbol synthetic, added in classfile v49.0. */
+ public static final int SYNTHETIC = 1<<12;
+
+ /** Flag that marks attribute interfaces, added in classfile v49.0. */
+ public static final int ANNOTATION = 1<<13;
+
+ /** An enumeration type or an enumeration constant, added in
+ * classfile v49.0. */
+ public static final int ENUM = 1<<14;
+
+ public static final int StandardFlags = 0x0fff;
+
+ // Because the following access flags are overloaded with other
+ // bit positions, we translate them when reading and writing class
+ // files into unique bits positions: ACC_SYNTHETIC <-> SYNTHETIC,
+ // for example.
+ public static final int ACC_SUPER = 0x0020;
+ public static final int ACC_BRIDGE = 0x0040;
+ public static final int ACC_VARARGS = 0x0080;
+
+ /*****************************************
+ * Internal compiler flags (no bits in the lower 16).
+ *****************************************/
+
+ /** Flag is set if symbol is deprecated.
+ */
+ public static final int DEPRECATED = 1<<17;
+
+ /** Flag is set for a variable symbol if the variable's definition
+ * has an initializer part.
+ */
+ public static final int HASINIT = 1<<18;
+
+ /** Flag is set for compiler-generated anonymous method symbols
+ * that `own' an initializer block.
+ */
+ public static final int BLOCK = 1<<20;
+
+ /** Flag is set for compiler-generated abstract methods that implement
+ * an interface method (Miranda methods).
+ */
+ public static final int IPROXY = 1<<21;
+
+ /** Flag is set for nested classes that do not access instance members
+ * or `this' of an outer class and therefore don't need to be passed
+ * a this$n reference. This flag is currently set only for anonymous
+ * classes in superclass constructor calls and only for pre 1.4 targets.
+ * todo: use this flag for optimizing away this$n parameters in
+ * other cases.
+ */
+ public static final int NOOUTERTHIS = 1<<22;
+
+ /** Flag is set for package symbols if a package has a member or
+ * directory and therefore exists.
+ */
+ public static final int EXISTS = 1<<23;
+
+ /** Flag is set for compiler-generated compound classes
+ * representing multiple variable bounds
+ */
+ public static final int COMPOUND = 1<<24;
+
+ /** Flag is set for class symbols if a class file was found for this class.
+ */
+ public static final int CLASS_SEEN = 1<<25;
+
+ /** Flag is set for class symbols if a source file was found for this
+ * class.
+ */
+ public static final int SOURCE_SEEN = 1<<26;
+
+ /* State flags (are reset during compilation).
+ */
+
+ /** Flag for class symbols is set and later re-set as a lock in
+ * Enter to detect cycles in the superclass/superinterface
+ * relations. Similarly for constructor call cycle detection in
+ * Attr.
+ */
+ public static final int LOCKED = 1<<27;
+
+ /** Flag for class symbols is set and later re-set to indicate that a class
+ * has been entered but has not yet been attributed.
+ */
+ public static final int UNATTRIBUTED = 1<<28;
+
+ /** Flag for synthesized default constructors of anonymous classes.
+ */
+ public static final int ANONCONSTR = 1<<29;
+
+ /** Flag for class symbols to indicate it has been checked and found
+ * acyclic.
+ */
+ public static final int ACYCLIC = 1<<30;
+
+ /** Flag that marks bridge methods.
+ */
+ public static final long BRIDGE = 1L<<31;
+
+ /** Flag that marks formal parameters.
+ */
+ public static final long PARAMETER = 1L<<33;
+
+ /** Flag that marks varargs methods.
+ */
+ public static final long VARARGS = 1L<<34;
+
+ /** Flag for annotation type symbols to indicate it has been
+ * checked and found acyclic.
+ */
+ public static final long ACYCLIC_ANN = 1L<<35;
+
+ /** Flag that marks a generated default constructor.
+ */
+ public static final long GENERATEDCONSTR = 1L<<36;
+
+ /** Flag that marks a hypothetical method that need not really be
+ * generated in the binary, but is present in the symbol table to
+ * simplify checking for erasure clashes.
+ */
+ public static final long HYPOTHETICAL = 1L<<37;
+
+ /**
+ * Flag that marks a Sun proprietary class.
+ */
+ public static final long PROPRIETARY = 1L<<38;
+
+ /** Modifier masks.
+ */
+ public static final int
+ AccessFlags = PUBLIC | PROTECTED | PRIVATE,
+ LocalClassFlags = FINAL | ABSTRACT | STRICTFP | ENUM | SYNTHETIC,
+ MemberClassFlags = LocalClassFlags | INTERFACE | AccessFlags,
+ ClassFlags = LocalClassFlags | INTERFACE | PUBLIC | ANNOTATION,
+ InterfaceVarFlags = FINAL | STATIC | PUBLIC,
+ VarFlags = AccessFlags | FINAL | STATIC |
+ VOLATILE | TRANSIENT | ENUM,
+ ConstructorFlags = AccessFlags,
+ InterfaceMethodFlags = ABSTRACT | PUBLIC,
+ MethodFlags = AccessFlags | ABSTRACT | STATIC | NATIVE |
+ SYNCHRONIZED | FINAL | STRICTFP;
+ public static final long
+ LocalVarFlags = FINAL | PARAMETER;
+
+ public static Set<Modifier> asModifierSet(long flags) {
+ Set<Modifier> modifiers = modifierSets.get(flags);
+ if (modifiers == null) {
+ modifiers = java.util.EnumSet.noneOf(Modifier.class);
+ if (0 != (flags & PUBLIC)) modifiers.add(Modifier.PUBLIC);
+ if (0 != (flags & PROTECTED)) modifiers.add(Modifier.PROTECTED);
+ if (0 != (flags & PRIVATE)) modifiers.add(Modifier.PRIVATE);
+ if (0 != (flags & ABSTRACT)) modifiers.add(Modifier.ABSTRACT);
+ if (0 != (flags & STATIC)) modifiers.add(Modifier.STATIC);
+ if (0 != (flags & FINAL)) modifiers.add(Modifier.FINAL);
+ if (0 != (flags & TRANSIENT)) modifiers.add(Modifier.TRANSIENT);
+ if (0 != (flags & VOLATILE)) modifiers.add(Modifier.VOLATILE);
+ if (0 != (flags & SYNCHRONIZED))
+ modifiers.add(Modifier.SYNCHRONIZED);
+ if (0 != (flags & NATIVE)) modifiers.add(Modifier.NATIVE);
+ if (0 != (flags & STRICTFP)) modifiers.add(Modifier.STRICTFP);
+ modifiers = Collections.unmodifiableSet(modifiers);
+ modifierSets.put(flags, modifiers);
+ }
+ return modifiers;
+ }
+
+ // Cache of modifier sets.
+ private static Map<Long, Set<Modifier>> modifierSets =
+ new java.util.concurrent.ConcurrentHashMap<Long, Set<Modifier>>(64);
+
+ public static boolean isStatic(Symbol symbol) {
+ return (symbol.flags() & STATIC) != 0;
+ }
+
+ public static boolean isEnum(Symbol symbol) {
+ return (symbol.flags() & ENUM) != 0;
+ }
+
+ public static boolean isConstant(Symbol.VarSymbol symbol) {
+ return symbol.getConstValue() != null;
+ }
+}