--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symtab.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,829 @@
+/*
+ * Copyright (c) 1999, 2017, 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.Collection;
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import javax.lang.model.element.ElementVisitor;
+
+import com.sun.tools.javac.code.Scope.WriteableScope;
+import com.sun.tools.javac.code.Symbol.ClassSymbol;
+import com.sun.tools.javac.code.Symbol.Completer;
+import com.sun.tools.javac.code.Symbol.CompletionFailure;
+import com.sun.tools.javac.code.Symbol.MethodSymbol;
+import com.sun.tools.javac.code.Symbol.ModuleSymbol;
+import com.sun.tools.javac.code.Symbol.PackageSymbol;
+import com.sun.tools.javac.code.Symbol.TypeSymbol;
+import com.sun.tools.javac.code.Symbol.VarSymbol;
+import com.sun.tools.javac.code.Type.BottomType;
+import com.sun.tools.javac.code.Type.ClassType;
+import com.sun.tools.javac.code.Type.ErrorType;
+import com.sun.tools.javac.code.Type.JCPrimitiveType;
+import com.sun.tools.javac.code.Type.JCVoidType;
+import com.sun.tools.javac.code.Type.MethodType;
+import com.sun.tools.javac.code.Type.UnknownType;
+import com.sun.tools.javac.comp.Modules;
+import com.sun.tools.javac.util.Assert;
+import com.sun.tools.javac.util.Context;
+import com.sun.tools.javac.util.Convert;
+import com.sun.tools.javac.util.DefinedBy;
+import com.sun.tools.javac.util.DefinedBy.Api;
+import com.sun.tools.javac.util.Iterators;
+import com.sun.tools.javac.util.JavacMessages;
+import com.sun.tools.javac.util.List;
+import com.sun.tools.javac.util.Name;
+import com.sun.tools.javac.util.Names;
+
+import static com.sun.tools.javac.code.Flags.*;
+import static com.sun.tools.javac.code.Kinds.Kind.*;
+import static com.sun.tools.javac.code.TypeTag.*;
+
+/** A class that defines all predefined constants and operators
+ * as well as special classes such as java.lang.Object, which need
+ * to be known to the compiler. All symbols are held in instance
+ * fields. This makes it possible to work in multiple concurrent
+ * projects, which might use different class files for library classes.
+ *
+ * <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 Symtab {
+ /** The context key for the symbol table. */
+ protected static final Context.Key<Symtab> symtabKey = new Context.Key<>();
+
+ /** Get the symbol table instance. */
+ public static Symtab instance(Context context) {
+ Symtab instance = context.get(symtabKey);
+ if (instance == null)
+ instance = new Symtab(context);
+ return instance;
+ }
+
+ /** Builtin types.
+ */
+ public final JCPrimitiveType byteType = new JCPrimitiveType(BYTE, null);
+ public final JCPrimitiveType charType = new JCPrimitiveType(CHAR, null);
+ public final JCPrimitiveType shortType = new JCPrimitiveType(SHORT, null);
+ public final JCPrimitiveType intType = new JCPrimitiveType(INT, null);
+ public final JCPrimitiveType longType = new JCPrimitiveType(LONG, null);
+ public final JCPrimitiveType floatType = new JCPrimitiveType(FLOAT, null);
+ public final JCPrimitiveType doubleType = new JCPrimitiveType(DOUBLE, null);
+ public final JCPrimitiveType booleanType = new JCPrimitiveType(BOOLEAN, null);
+ public final Type botType = new BottomType();
+ public final JCVoidType voidType = new JCVoidType();
+
+ private final Names names;
+ private final JavacMessages messages;
+ private final Completer initialCompleter;
+ private final Completer moduleCompleter;
+
+ /** A symbol for the unnamed module.
+ */
+ public final ModuleSymbol unnamedModule;
+
+ /** The error module.
+ */
+ public final ModuleSymbol errModule;
+
+ /** A symbol for no module, for use with -source 8 or less
+ */
+ public final ModuleSymbol noModule;
+
+ /** A symbol for the root package.
+ */
+ public final PackageSymbol rootPackage;
+
+ /** A symbol that stands for a missing symbol.
+ */
+ public final TypeSymbol noSymbol;
+
+ /** The error symbol.
+ */
+ public final ClassSymbol errSymbol;
+
+ /** The unknown symbol.
+ */
+ public final ClassSymbol unknownSymbol;
+
+ /** A value for the errType, with a originalType of noType */
+ public final Type errType;
+
+ /** A value for the unknown type. */
+ public final Type unknownType;
+
+ /** The builtin type of all arrays. */
+ public final ClassSymbol arrayClass;
+ public final MethodSymbol arrayCloneMethod;
+
+ /** VGJ: The (singleton) type of all bound types. */
+ public final ClassSymbol boundClass;
+
+ /** The builtin type of all methods. */
+ public final ClassSymbol methodClass;
+
+ /** A symbol for the java.base module.
+ */
+ public final ModuleSymbol java_base;
+
+ /** Predefined types.
+ */
+ public final Type objectType;
+ public final Type objectsType;
+ public final Type classType;
+ public final Type classLoaderType;
+ public final Type stringType;
+ public final Type stringBufferType;
+ public final Type stringBuilderType;
+ public final Type cloneableType;
+ public final Type serializableType;
+ public final Type serializedLambdaType;
+ public final Type varHandleType;
+ public final Type methodHandleType;
+ public final Type methodHandleLookupType;
+ public final Type methodTypeType;
+ public final Type nativeHeaderType;
+ public final Type throwableType;
+ public final Type errorType;
+ public final Type interruptedExceptionType;
+ public final Type illegalArgumentExceptionType;
+ public final Type exceptionType;
+ public final Type runtimeExceptionType;
+ public final Type classNotFoundExceptionType;
+ public final Type noClassDefFoundErrorType;
+ public final Type noSuchFieldErrorType;
+ public final Type assertionErrorType;
+ public final Type cloneNotSupportedExceptionType;
+ public final Type annotationType;
+ public final TypeSymbol enumSym;
+ public final Type listType;
+ public final Type collectionsType;
+ public final Type comparableType;
+ public final Type comparatorType;
+ public final Type arraysType;
+ public final Type iterableType;
+ public final Type iteratorType;
+ public final Type annotationTargetType;
+ public final Type overrideType;
+ public final Type retentionType;
+ public final Type deprecatedType;
+ public final Type suppressWarningsType;
+ public final Type supplierType;
+ public final Type inheritedType;
+ public final Type profileType;
+ public final Type proprietaryType;
+ public final Type systemType;
+ public final Type autoCloseableType;
+ public final Type trustMeType;
+ public final Type lambdaMetafactory;
+ public final Type stringConcatFactory;
+ public final Type repeatableType;
+ public final Type documentedType;
+ public final Type elementTypeType;
+ public final Type functionalInterfaceType;
+
+ /** The symbol representing the length field of an array.
+ */
+ public final VarSymbol lengthVar;
+
+ /** The symbol representing the final finalize method on enums */
+ public final MethodSymbol enumFinalFinalize;
+
+ /** The symbol representing the close method on TWR AutoCloseable type */
+ public final MethodSymbol autoCloseableClose;
+
+ /** The predefined type that belongs to a tag.
+ */
+ public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()];
+
+ /** The name of the class that belongs to a basic type tag.
+ */
+ public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()];
+
+ /** A hashtable containing the encountered top-level and member classes,
+ * indexed by flat names. The table does not contain local classes.
+ * It should be updated from the outside to reflect classes defined
+ * by compiled source files.
+ */
+ private final Map<Name, Map<ModuleSymbol,ClassSymbol>> classes = new HashMap<>();
+
+ /** A hashtable containing the encountered packages.
+ * the table should be updated from outside to reflect packages defined
+ * by compiled source files.
+ */
+ private final Map<Name, Map<ModuleSymbol,PackageSymbol>> packages = new HashMap<>();
+
+ /** A hashtable giving the encountered modules.
+ */
+ private final Map<Name, ModuleSymbol> modules = new LinkedHashMap<>();
+
+ public void initType(Type type, ClassSymbol c) {
+ type.tsym = c;
+ typeOfTag[type.getTag().ordinal()] = type;
+ }
+
+ public void initType(Type type, String name) {
+ initType(
+ type,
+ new ClassSymbol(
+ PUBLIC, names.fromString(name), type, rootPackage));
+ }
+
+ public void initType(Type type, String name, String bname) {
+ initType(type, name);
+ boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname);
+ }
+
+ /** The class symbol that owns all predefined symbols.
+ */
+ public final ClassSymbol predefClass;
+
+ /** Enter a class into symbol table.
+ * @param s The name of the class.
+ */
+ private Type enterClass(String s) {
+ return enterClass(java_base, names.fromString(s)).type;
+ }
+
+ public void synthesizeEmptyInterfaceIfMissing(final Type type) {
+ final Completer completer = type.tsym.completer;
+ type.tsym.completer = new Completer() {
+ @Override
+ public void complete(Symbol sym) throws CompletionFailure {
+ try {
+ completer.complete(sym);
+ } catch (CompletionFailure e) {
+ sym.flags_field |= (PUBLIC | INTERFACE);
+ ((ClassType) sym.type).supertype_field = objectType;
+ }
+ }
+
+ @Override
+ public boolean isTerminal() {
+ return completer.isTerminal();
+ }
+ };
+ }
+
+ public void synthesizeBoxTypeIfMissing(final Type type) {
+ ClassSymbol sym = enterClass(java_base, boxedName[type.getTag().ordinal()]);
+ final Completer completer = sym.completer;
+ sym.completer = new Completer() {
+ @Override
+ public void complete(Symbol sym) throws CompletionFailure {
+ try {
+ completer.complete(sym);
+ } catch (CompletionFailure e) {
+ sym.flags_field |= PUBLIC;
+ ((ClassType) sym.type).supertype_field = objectType;
+ MethodSymbol boxMethod =
+ new MethodSymbol(PUBLIC | STATIC, names.valueOf,
+ new MethodType(List.of(type), sym.type,
+ List.nil(), methodClass),
+ sym);
+ sym.members().enter(boxMethod);
+ MethodSymbol unboxMethod =
+ new MethodSymbol(PUBLIC,
+ type.tsym.name.append(names.Value), // x.intValue()
+ new MethodType(List.nil(), type,
+ List.nil(), methodClass),
+ sym);
+ sym.members().enter(unboxMethod);
+ }
+ }
+
+ @Override
+ public boolean isTerminal() {
+ return completer.isTerminal();
+ }
+ };
+ }
+
+ // Enter a synthetic class that is used to mark classes in ct.sym.
+ // This class does not have a class file.
+ private Type enterSyntheticAnnotation(String name) {
+ // for now, leave the module null, to prevent problems from synthesizing the
+ // existence of a class in any specific module, including noModule
+ ClassType type = (ClassType)enterClass(java_base, names.fromString(name)).type;
+ ClassSymbol sym = (ClassSymbol)type.tsym;
+ sym.completer = Completer.NULL_COMPLETER;
+ sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE;
+ sym.erasure_field = type;
+ sym.members_field = WriteableScope.create(sym);
+ type.typarams_field = List.nil();
+ type.allparams_field = List.nil();
+ type.supertype_field = annotationType;
+ type.interfaces_field = List.nil();
+ return type;
+ }
+
+ /** Constructor; enters all predefined identifiers and operators
+ * into symbol table.
+ */
+ protected Symtab(Context context) throws CompletionFailure {
+ context.put(symtabKey, this);
+
+ names = Names.instance(context);
+
+ // Create the unknown type
+ unknownType = new UnknownType();
+
+ messages = JavacMessages.instance(context);
+
+ rootPackage = new PackageSymbol(names.empty, null);
+
+ // create the basic builtin symbols
+ unnamedModule = new ModuleSymbol(names.empty, null) {
+ {
+ directives = List.nil();
+ exports = List.nil();
+ provides = List.nil();
+ uses = List.nil();
+ ModuleSymbol java_base = enterModule(names.java_base);
+ com.sun.tools.javac.code.Directive.RequiresDirective d =
+ new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
+ EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
+ requires = List.of(d);
+ }
+ @Override
+ public String toString() {
+ return messages.getLocalizedString("compiler.misc.unnamed.module");
+ }
+ };
+ addRootPackageFor(unnamedModule);
+ unnamedModule.enclosedPackages = unnamedModule.enclosedPackages.prepend(unnamedModule.unnamedPackage);
+
+ errModule = new ModuleSymbol(names.empty, null) {
+ {
+ directives = List.nil();
+ exports = List.nil();
+ provides = List.nil();
+ uses = List.nil();
+ ModuleSymbol java_base = enterModule(names.java_base);
+ com.sun.tools.javac.code.Directive.RequiresDirective d =
+ new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
+ EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
+ requires = List.of(d);
+ }
+ };
+ addRootPackageFor(errModule);
+
+ noModule = new ModuleSymbol(names.empty, null) {
+ @Override public boolean isNoModule() {
+ return true;
+ }
+ };
+ addRootPackageFor(noModule);
+
+ noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) {
+ @Override @DefinedBy(Api.LANGUAGE_MODEL)
+ public <R, P> R accept(ElementVisitor<R, P> v, P p) {
+ return v.visitUnknown(this, p);
+ }
+ };
+
+ // create the error symbols
+ errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage);
+ errType = new ErrorType(errSymbol, Type.noType);
+
+ unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage);
+ unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol);
+ unknownSymbol.type = unknownType;
+
+ // initialize builtin types
+ initType(byteType, "byte", "Byte");
+ initType(shortType, "short", "Short");
+ initType(charType, "char", "Character");
+ initType(intType, "int", "Integer");
+ initType(longType, "long", "Long");
+ initType(floatType, "float", "Float");
+ initType(doubleType, "double", "Double");
+ initType(booleanType, "boolean", "Boolean");
+ initType(voidType, "void", "Void");
+ initType(botType, "<nulltype>");
+ initType(errType, errSymbol);
+ initType(unknownType, unknownSymbol);
+
+ // the builtin class of all arrays
+ arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol);
+
+ // VGJ
+ boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol);
+ boundClass.members_field = new Scope.ErrorScope(boundClass);
+
+ // the builtin class of all methods
+ methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol);
+ methodClass.members_field = new Scope.ErrorScope(boundClass);
+
+ // Create class to hold all predefined constants and operations.
+ predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage);
+ WriteableScope scope = WriteableScope.create(predefClass);
+ predefClass.members_field = scope;
+
+ // Get the initial completer for Symbols from the ClassFinder
+ initialCompleter = ClassFinder.instance(context).getCompleter();
+ rootPackage.members_field = WriteableScope.create(rootPackage);
+
+ // Enter symbols for basic types.
+ scope.enter(byteType.tsym);
+ scope.enter(shortType.tsym);
+ scope.enter(charType.tsym);
+ scope.enter(intType.tsym);
+ scope.enter(longType.tsym);
+ scope.enter(floatType.tsym);
+ scope.enter(doubleType.tsym);
+ scope.enter(booleanType.tsym);
+ scope.enter(errType.tsym);
+
+ // Enter symbol for the errSymbol
+ scope.enter(errSymbol);
+
+ Source source = Source.instance(context);
+ if (source.allowModules()) {
+ java_base = enterModule(names.java_base);
+ //avoid completing java.base during the Symtab initialization
+ java_base.completer = Completer.NULL_COMPLETER;
+ java_base.visiblePackages = Collections.emptyMap();
+ } else {
+ java_base = noModule;
+ }
+
+ // Get the initial completer for ModuleSymbols from Modules
+ moduleCompleter = Modules.instance(context).getCompleter();
+
+ // Enter predefined classes. All are assumed to be in the java.base module.
+ objectType = enterClass("java.lang.Object");
+ objectsType = enterClass("java.util.Objects");
+ classType = enterClass("java.lang.Class");
+ stringType = enterClass("java.lang.String");
+ stringBufferType = enterClass("java.lang.StringBuffer");
+ stringBuilderType = enterClass("java.lang.StringBuilder");
+ cloneableType = enterClass("java.lang.Cloneable");
+ throwableType = enterClass("java.lang.Throwable");
+ serializableType = enterClass("java.io.Serializable");
+ serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda");
+ varHandleType = enterClass("java.lang.invoke.VarHandle");
+ methodHandleType = enterClass("java.lang.invoke.MethodHandle");
+ methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup");
+ methodTypeType = enterClass("java.lang.invoke.MethodType");
+ errorType = enterClass("java.lang.Error");
+ illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException");
+ interruptedExceptionType = enterClass("java.lang.InterruptedException");
+ exceptionType = enterClass("java.lang.Exception");
+ runtimeExceptionType = enterClass("java.lang.RuntimeException");
+ classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException");
+ noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError");
+ noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError");
+ assertionErrorType = enterClass("java.lang.AssertionError");
+ cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException");
+ annotationType = enterClass("java.lang.annotation.Annotation");
+ classLoaderType = enterClass("java.lang.ClassLoader");
+ enumSym = enterClass(java_base, names.java_lang_Enum);
+ enumFinalFinalize =
+ new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL,
+ names.finalize,
+ new MethodType(List.nil(), voidType,
+ List.nil(), methodClass),
+ enumSym);
+ listType = enterClass("java.util.List");
+ collectionsType = enterClass("java.util.Collections");
+ comparableType = enterClass("java.lang.Comparable");
+ comparatorType = enterClass("java.util.Comparator");
+ arraysType = enterClass("java.util.Arrays");
+ iterableType = enterClass("java.lang.Iterable");
+ iteratorType = enterClass("java.util.Iterator");
+ annotationTargetType = enterClass("java.lang.annotation.Target");
+ overrideType = enterClass("java.lang.Override");
+ retentionType = enterClass("java.lang.annotation.Retention");
+ deprecatedType = enterClass("java.lang.Deprecated");
+ suppressWarningsType = enterClass("java.lang.SuppressWarnings");
+ supplierType = enterClass("java.util.function.Supplier");
+ inheritedType = enterClass("java.lang.annotation.Inherited");
+ repeatableType = enterClass("java.lang.annotation.Repeatable");
+ documentedType = enterClass("java.lang.annotation.Documented");
+ elementTypeType = enterClass("java.lang.annotation.ElementType");
+ systemType = enterClass("java.lang.System");
+ autoCloseableType = enterClass("java.lang.AutoCloseable");
+ autoCloseableClose = new MethodSymbol(PUBLIC,
+ names.close,
+ new MethodType(List.nil(), voidType,
+ List.of(exceptionType), methodClass),
+ autoCloseableType.tsym);
+ trustMeType = enterClass("java.lang.SafeVarargs");
+ nativeHeaderType = enterClass("java.lang.annotation.Native");
+ lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory");
+ stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory");
+ functionalInterfaceType = enterClass("java.lang.FunctionalInterface");
+
+ synthesizeEmptyInterfaceIfMissing(autoCloseableType);
+ synthesizeEmptyInterfaceIfMissing(cloneableType);
+ synthesizeEmptyInterfaceIfMissing(serializableType);
+ synthesizeEmptyInterfaceIfMissing(lambdaMetafactory);
+ synthesizeEmptyInterfaceIfMissing(serializedLambdaType);
+ synthesizeEmptyInterfaceIfMissing(stringConcatFactory);
+ synthesizeBoxTypeIfMissing(doubleType);
+ synthesizeBoxTypeIfMissing(floatType);
+ synthesizeBoxTypeIfMissing(voidType);
+
+ // Enter a synthetic class that is used to mark internal
+ // proprietary classes in ct.sym. This class does not have a
+ // class file.
+ proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation");
+
+ // Enter a synthetic class that is used to provide profile info for
+ // classes in ct.sym. This class does not have a class file.
+ profileType = enterSyntheticAnnotation("jdk.Profile+Annotation");
+ MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym);
+ profileType.tsym.members().enter(m);
+
+ // Enter a class for arrays.
+ // The class implements java.lang.Cloneable and java.io.Serializable.
+ // It has a final length field and a clone method.
+ ClassType arrayClassType = (ClassType)arrayClass.type;
+ arrayClassType.supertype_field = objectType;
+ arrayClassType.interfaces_field = List.of(cloneableType, serializableType);
+ arrayClass.members_field = WriteableScope.create(arrayClass);
+ lengthVar = new VarSymbol(
+ PUBLIC | FINAL,
+ names.length,
+ intType,
+ arrayClass);
+ arrayClass.members().enter(lengthVar);
+ arrayCloneMethod = new MethodSymbol(
+ PUBLIC,
+ names.clone,
+ new MethodType(List.nil(), objectType,
+ List.nil(), methodClass),
+ arrayClass);
+ arrayClass.members().enter(arrayCloneMethod);
+
+ if (java_base != noModule)
+ java_base.completer = moduleCompleter::complete; //bootstrap issues
+
+ }
+
+ /** Define a new class given its name and owner.
+ */
+ public ClassSymbol defineClass(Name name, Symbol owner) {
+ ClassSymbol c = new ClassSymbol(0, name, owner);
+ c.completer = initialCompleter;
+ return c;
+ }
+
+ /** Create a new toplevel or member class symbol with given name
+ * and owner and enter in `classes' unless already there.
+ */
+ public ClassSymbol enterClass(ModuleSymbol msym, Name name, TypeSymbol owner) {
+ Assert.checkNonNull(msym);
+ Name flatname = TypeSymbol.formFlatName(name, owner);
+ ClassSymbol c = getClass(msym, flatname);
+ if (c == null) {
+ c = defineClass(name, owner);
+ doEnterClass(msym, c);
+ } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
+ // reassign fields of classes that might have been loaded with
+ // their flat names.
+ c.owner.members().remove(c);
+ c.name = name;
+ c.owner = owner;
+ c.fullname = ClassSymbol.formFullName(name, owner);
+ }
+ return c;
+ }
+
+ public ClassSymbol getClass(ModuleSymbol msym, Name flatName) {
+ Assert.checkNonNull(msym, flatName::toString);
+ return classes.getOrDefault(flatName, Collections.emptyMap()).get(msym);
+ }
+
+ public PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName) {
+ Assert.checkNonNull(msym);
+
+ if (flatName.isEmpty()) {
+ //unnamed packages only from the current module - visiblePackages contains *root* package, not unnamed package!
+ return msym.unnamedPackage;
+ }
+
+ if (msym == noModule) {
+ return enterPackage(msym, flatName);
+ }
+
+ msym.complete();
+
+ PackageSymbol pack;
+
+ pack = msym.visiblePackages.get(flatName);
+
+ if (pack != null)
+ return pack;
+
+ pack = getPackage(msym, flatName);
+
+ if (pack != null && pack.exists())
+ return pack;
+
+ boolean dependsOnUnnamed = msym.requires != null &&
+ msym.requires.stream()
+ .map(rd -> rd.module)
+ .anyMatch(mod -> mod == unnamedModule);
+
+ if (dependsOnUnnamed) {
+ //msyms depends on the unnamed module, for which we generally don't know
+ //the list of packages it "exports" ahead of time. So try to lookup the package in the
+ //current module, and in the unnamed module and see if it exists in one of them
+ PackageSymbol unnamedPack = getPackage(unnamedModule, flatName);
+
+ if (unnamedPack != null && unnamedPack.exists()) {
+ msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
+ return unnamedPack;
+ }
+
+ pack = enterPackage(msym, flatName);
+ pack.complete();
+ if (pack.exists())
+ return pack;
+
+ unnamedPack = enterPackage(unnamedModule, flatName);
+ unnamedPack.complete();
+ if (unnamedPack.exists()) {
+ msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
+ return unnamedPack;
+ }
+
+ return pack;
+ }
+
+ return enterPackage(msym, flatName);
+ }
+
+ private static final Map<ModuleSymbol, ClassSymbol> EMPTY = new HashMap<>();
+
+ public void removeClass(ModuleSymbol msym, Name flatName) {
+ classes.getOrDefault(flatName, EMPTY).remove(msym);
+ }
+
+ public Iterable<ClassSymbol> getAllClasses() {
+ return () -> Iterators.createCompoundIterator(classes.values(), v -> v.values().iterator());
+ }
+
+ private void doEnterClass(ModuleSymbol msym, ClassSymbol cs) {
+ classes.computeIfAbsent(cs.flatname, n -> new HashMap<>()).put(msym, cs);
+ }
+
+ /** Create a new member or toplevel class symbol with given flat name
+ * and enter in `classes' unless already there.
+ */
+ public ClassSymbol enterClass(ModuleSymbol msym, Name flatname) {
+ Assert.checkNonNull(msym);
+ PackageSymbol ps = lookupPackage(msym, Convert.packagePart(flatname));
+ Assert.checkNonNull(ps);
+ Assert.checkNonNull(ps.modle);
+ ClassSymbol c = getClass(ps.modle, flatname);
+ if (c == null) {
+ c = defineClass(Convert.shortName(flatname), ps);
+ doEnterClass(ps.modle, c);
+ return c;
+ } else
+ return c;
+ }
+
+ /** Check to see if a package exists, given its fully qualified name.
+ */
+ public boolean packageExists(ModuleSymbol msym, Name fullname) {
+ Assert.checkNonNull(msym);
+ return lookupPackage(msym, fullname).exists();
+ }
+
+ /** Make a package, given its fully qualified name.
+ */
+ public PackageSymbol enterPackage(ModuleSymbol currModule, Name fullname) {
+ Assert.checkNonNull(currModule);
+ PackageSymbol p = getPackage(currModule, fullname);
+ if (p == null) {
+ Assert.check(!fullname.isEmpty(), () -> "rootPackage missing!; currModule: " + currModule);
+ p = new PackageSymbol(
+ Convert.shortName(fullname),
+ enterPackage(currModule, Convert.packagePart(fullname)));
+ p.completer = initialCompleter;
+ p.modle = currModule;
+ doEnterPackage(currModule, p);
+ }
+ return p;
+ }
+
+ private void doEnterPackage(ModuleSymbol msym, PackageSymbol pack) {
+ packages.computeIfAbsent(pack.fullname, n -> new HashMap<>()).put(msym, pack);
+ msym.enclosedPackages = msym.enclosedPackages.prepend(pack);
+ }
+
+ private void addRootPackageFor(ModuleSymbol module) {
+ doEnterPackage(module, rootPackage);
+ PackageSymbol unnamedPackage = new PackageSymbol(names.empty, rootPackage) {
+ @Override
+ public String toString() {
+ return messages.getLocalizedString("compiler.misc.unnamed.package");
+ }
+ };
+ unnamedPackage.modle = module;
+ //we cannot use a method reference below, as initialCompleter might be null now
+ unnamedPackage.completer = s -> initialCompleter.complete(s);
+ module.unnamedPackage = unnamedPackage;
+ }
+
+ public PackageSymbol getPackage(ModuleSymbol module, Name fullname) {
+ return packages.getOrDefault(fullname, Collections.emptyMap()).get(module);
+ }
+
+ public ModuleSymbol enterModule(Name name) {
+ ModuleSymbol msym = modules.get(name);
+ if (msym == null) {
+ msym = ModuleSymbol.create(name, names.module_info);
+ addRootPackageFor(msym);
+ msym.completer = s -> moduleCompleter.complete(s); //bootstrap issues
+ modules.put(name, msym);
+ }
+ return msym;
+ }
+
+ public ModuleSymbol getModule(Name name) {
+ return modules.get(name);
+ }
+
+ //temporary:
+ public ModuleSymbol inferModule(Name packageName) {
+ if (packageName.isEmpty())
+ return java_base == noModule ? noModule : unnamedModule;//!
+
+ ModuleSymbol msym = null;
+ Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
+ if (map == null)
+ return null;
+ for (Map.Entry<ModuleSymbol,PackageSymbol> e: map.entrySet()) {
+ if (!e.getValue().members().isEmpty()) {
+ if (msym == null) {
+ msym = e.getKey();
+ } else {
+ return null;
+ }
+ }
+ }
+ return msym;
+ }
+
+ public List<ModuleSymbol> listPackageModules(Name packageName) {
+ if (packageName.isEmpty())
+ return List.nil();
+
+ List<ModuleSymbol> result = List.nil();
+ Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
+ if (map != null) {
+ for (Map.Entry<ModuleSymbol, PackageSymbol> e: map.entrySet()) {
+ if (!e.getValue().members().isEmpty()) {
+ result = result.prepend(e.getKey());
+ }
+ }
+ }
+ return result;
+ }
+
+ public Collection<ModuleSymbol> getAllModules() {
+ return modules.values();
+ }
+
+ public Iterable<ClassSymbol> getClassesForName(Name candidate) {
+ return classes.getOrDefault(candidate, Collections.emptyMap()).values();
+ }
+
+ public Iterable<PackageSymbol> getPackagesForName(Name candidate) {
+ return packages.getOrDefault(candidate, Collections.emptyMap()).values();
+ }
+}