--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Flags.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,441 @@
+/*
+ * Copyright (c) 1999, 2016, 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 com.sun.tools.javac.code;
+
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+import javax.lang.model.element.Modifier;
+
+import com.sun.tools.javac.util.Assert;
+import com.sun.tools.javac.util.StringUtils;
+
+/** Access flags and other modifiers for Java classes and members.
+ *
+ * <p><b>This is NOT part of any supported API.
+ * 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) {
+ StringBuilder buf = new StringBuilder();
+ String sep = "";
+ for (Flag flag : asFlagSet(flags)) {
+ buf.append(sep);
+ buf.append(flag);
+ sep = " ";
+ }
+ return buf.toString();
+ }
+
+ public static EnumSet<Flag> asFlagSet(long flags) {
+ EnumSet<Flag> flagSet = EnumSet.noneOf(Flag.class);
+ for (Flag flag : Flag.values()) {
+ if ((flags & flag.value) != 0) {
+ flagSet.add(flag);
+ flags &= ~flag.value;
+ }
+ }
+ Assert.check(flags == 0);
+ return flagSet;
+ }
+
+ /* Standard Java flags.
+ */
+ public static final int PUBLIC = 1;
+ 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;
+
+ /** Added in SE8, represents constructs implicitly declared in source. */
+ public static final int MANDATED = 1<<15;
+
+ 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;
+ public static final int ACC_MODULE = 0x8000;
+
+ /*****************************************
+ * Internal compiler flags (no bits in the lower 16).
+ *****************************************/
+
+ /** Flag is set if symbol is deprecated. See also DEPRECATED_REMOVAL.
+ */
+ 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 bit 21 is available. (used earlier to tag compiler-generated abstract methods that implement
+ * an interface method (Miranda methods)).
+ */
+
+ /** 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$n reference. This value is currently set only for anonymous
+ * classes in superclass constructor calls.
+ * todo: use this value for optimizing away this$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 - also used for 292 poly sig methods.
+ */
+ public static final long HYPOTHETICAL = 1L<<37;
+
+ /**
+ * Flag that marks an internal proprietary class.
+ */
+ public static final long PROPRIETARY = 1L<<38;
+
+ /**
+ * Flag that marks a multi-catch parameter.
+ */
+ public static final long UNION = 1L<<39;
+
+ // Flag bit (1L << 40) is available.
+
+ /**
+ * Flag that marks an 'effectively final' local variable.
+ */
+ public static final long EFFECTIVELY_FINAL = 1L<<41;
+
+ /**
+ * Flag that marks non-override equivalent methods with the same signature.
+ */
+ public static final long CLASH = 1L<<42;
+
+ /**
+ * Flag that marks either a default method or an interface containing default methods.
+ */
+ public static final long DEFAULT = 1L<<43;
+
+ /**
+ * Flag that marks class as auxiliary, ie a non-public class following
+ * the public class in a source file, that could block implicit compilation.
+ */
+ public static final long AUXILIARY = 1L<<44;
+
+ /**
+ * Flag that marks that a symbol is not available in the current profile
+ */
+ public static final long NOT_IN_PROFILE = 1L<<45;
+
+ /**
+ * Flag that indicates that an override error has been detected by Check.
+ */
+ public static final long BAD_OVERRIDE = 1L<<45;
+
+ /**
+ * Flag that indicates a signature polymorphic method (292).
+ */
+ public static final long SIGNATURE_POLYMORPHIC = 1L<<46;
+
+ /**
+ * Flag that indicates that an inference variable is used in a 'throws' clause.
+ */
+ public static final long THROWS = 1L<<47;
+
+ /**
+ * Flag that marks potentially ambiguous overloads
+ */
+ public static final long POTENTIALLY_AMBIGUOUS = 1L<<48;
+
+ /**
+ * Flag that marks a synthetic method body for a lambda expression
+ */
+ public static final long LAMBDA_METHOD = 1L<<49;
+
+ /**
+ * Flag to control recursion in TransTypes
+ */
+ public static final long TYPE_TRANSLATED = 1L<<50;
+
+ /**
+ * Flag to indicate class symbol is for module-info
+ */
+ public static final long MODULE = 1L<<51;
+
+ /**
+ * Flag to indicate the given ModuleSymbol is an automatic module.
+ */
+ public static final long AUTOMATIC_MODULE = 1L<<52;
+
+ /**
+ * Flag to indicate the given ModuleSymbol is a system module.
+ */
+ public static final long SYSTEM_MODULE = 1L<<53;
+
+ /**
+ * Flag to indicate the given symbol has a @Deprecated annotation.
+ */
+ public static final long DEPRECATED_ANNOTATION = 1L<<54;
+
+ /**
+ * Flag to indicate the given symbol has been deprecated and marked for removal.
+ */
+ public static final long DEPRECATED_REMOVAL = 1L<<55;
+
+ /**
+ * Flag to indicate the given PackageSymbol contains any non-.java and non-.class resources.
+ */
+ public static final long HAS_RESOURCE = 1L<<56;
+
+ /** 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
+ ExtendedStandardFlags = (long)StandardFlags | DEFAULT,
+ ModifierFlags = ((long)StandardFlags & ~INTERFACE) | DEFAULT,
+ InterfaceMethodMask = ABSTRACT | PRIVATE | STATIC | PUBLIC | STRICTFP | DEFAULT,
+ AnnotationTypeElementMask = ABSTRACT | PUBLIC,
+ LocalVarFlags = FINAL | PARAMETER,
+ ReceiverParamFlags = 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);
+ if (0 != (flags & DEFAULT)) modifiers.add(Modifier.DEFAULT);
+ modifiers = Collections.unmodifiableSet(modifiers);
+ modifierSets.put(flags, modifiers);
+ }
+ return modifiers;
+ }
+
+ // Cache of modifier sets.
+ private static final Map<Long, Set<Modifier>> modifierSets = new ConcurrentHashMap<>(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;
+ }
+
+
+ public enum Flag {
+ PUBLIC(Flags.PUBLIC),
+ PRIVATE(Flags.PRIVATE),
+ PROTECTED(Flags.PROTECTED),
+ STATIC(Flags.STATIC),
+ FINAL(Flags.FINAL),
+ SYNCHRONIZED(Flags.SYNCHRONIZED),
+ VOLATILE(Flags.VOLATILE),
+ TRANSIENT(Flags.TRANSIENT),
+ NATIVE(Flags.NATIVE),
+ INTERFACE(Flags.INTERFACE),
+ ABSTRACT(Flags.ABSTRACT),
+ DEFAULT(Flags.DEFAULT),
+ STRICTFP(Flags.STRICTFP),
+ BRIDGE(Flags.BRIDGE),
+ SYNTHETIC(Flags.SYNTHETIC),
+ ANNOTATION(Flags.ANNOTATION),
+ DEPRECATED(Flags.DEPRECATED),
+ HASINIT(Flags.HASINIT),
+ BLOCK(Flags.BLOCK),
+ ENUM(Flags.ENUM),
+ MANDATED(Flags.MANDATED),
+ NOOUTERTHIS(Flags.NOOUTERTHIS),
+ EXISTS(Flags.EXISTS),
+ COMPOUND(Flags.COMPOUND),
+ CLASS_SEEN(Flags.CLASS_SEEN),
+ SOURCE_SEEN(Flags.SOURCE_SEEN),
+ LOCKED(Flags.LOCKED),
+ UNATTRIBUTED(Flags.UNATTRIBUTED),
+ ANONCONSTR(Flags.ANONCONSTR),
+ ACYCLIC(Flags.ACYCLIC),
+ PARAMETER(Flags.PARAMETER),
+ VARARGS(Flags.VARARGS),
+ ACYCLIC_ANN(Flags.ACYCLIC_ANN),
+ GENERATEDCONSTR(Flags.GENERATEDCONSTR),
+ HYPOTHETICAL(Flags.HYPOTHETICAL),
+ PROPRIETARY(Flags.PROPRIETARY),
+ UNION(Flags.UNION),
+ EFFECTIVELY_FINAL(Flags.EFFECTIVELY_FINAL),
+ CLASH(Flags.CLASH),
+ AUXILIARY(Flags.AUXILIARY),
+ NOT_IN_PROFILE(Flags.NOT_IN_PROFILE),
+ BAD_OVERRIDE(Flags.BAD_OVERRIDE),
+ SIGNATURE_POLYMORPHIC(Flags.SIGNATURE_POLYMORPHIC),
+ THROWS(Flags.THROWS),
+ LAMBDA_METHOD(Flags.LAMBDA_METHOD),
+ TYPE_TRANSLATED(Flags.TYPE_TRANSLATED),
+ MODULE(Flags.MODULE),
+ AUTOMATIC_MODULE(Flags.AUTOMATIC_MODULE),
+ SYSTEM_MODULE(Flags.SYSTEM_MODULE),
+ DEPRECATED_ANNOTATION(Flags.DEPRECATED_ANNOTATION),
+ DEPRECATED_REMOVAL(Flags.DEPRECATED_REMOVAL),
+ HAS_RESOURCE(Flags.HAS_RESOURCE);
+
+ Flag(long flag) {
+ this.value = flag;
+ this.lowercaseName = StringUtils.toLowerCase(name());
+ }
+
+ @Override
+ public String toString() {
+ return lowercaseName;
+ }
+
+ final long value;
+ final String lowercaseName;
+ }
+
+}