/* * Copyright (c) 1999, 2019, 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.Source.Feature; 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.RootPackageSymbol; 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.code.Types.UniqueType; import com.sun.tools.javac.comp.Modules; import com.sun.tools.javac.jvm.Target; 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. * *

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. */ public class Symtab { /** The context key for the symbol table. */ protected static final Context.Key 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 objectMethodsType; 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 incompatibleClassChangeErrorType; 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; public final Type previewFeatureType; public final Type typeDescriptorType; public final Type recordType; /** 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> 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> packages = new HashMap<>(); /** A hashtable giving the encountered modules. */ private final Map modules = new LinkedHashMap<>(); private final Map classFields = new HashMap<>(); public VarSymbol getClassField(Type type, Types types) { return classFields.computeIfAbsent( new UniqueType(type, types), k -> { Type arg = null; if (type.getTag() == ARRAY || type.getTag() == CLASS) arg = types.erasure(type); else if (type.isPrimitiveOrVoid()) arg = types.boxedClass(type).type; else throw new AssertionError(type); Type t = new ClassType( classType.getEnclosingType(), List.of(arg), classType.tsym); return new VarSymbol( STATIC | PUBLIC | FINAL, names._class, t, type.tsym); }); } 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); MissingInfoHandler missingInfoHandler = MissingInfoHandler.instance(context); Target target = Target.instance(context); rootPackage = new RootPackageSymbol(names.empty, null, missingInfoHandler, target.runtimeUseNestAccess()); // 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 accept(ElementVisitor 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(""), 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, ""); 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 (Feature.MODULES.allowedInSource(source)) { 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"); objectMethodsType = enterClass("java.lang.runtime.ObjectMethods"); 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"); incompatibleClassChangeErrorType = enterClass("java.lang.IncompatibleClassChangeError"); 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"); previewFeatureType = enterClass("jdk.internal.PreviewFeature"); typeDescriptorType = enterClass("java.lang.invoke.TypeDescriptor"); recordType = enterClass("java.lang.Record"); 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 EMPTY = new HashMap<>(); public void removeClass(ModuleSymbol msym, Name flatName) { classes.getOrDefault(flatName, EMPTY).remove(msym); } public Iterable 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); unnamedPackage.flags_field |= EXISTS; 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 map = packages.get(packageName); if (map == null) return null; for (Map.Entry e: map.entrySet()) { if (!e.getValue().members().isEmpty()) { if (msym == null) { msym = e.getKey(); } else { return null; } } } return msym; } public List listPackageModules(Name packageName) { if (packageName.isEmpty()) return List.nil(); List result = List.nil(); Map map = packages.get(packageName); if (map != null) { for (Map.Entry e: map.entrySet()) { if (!e.getValue().members().isEmpty()) { result = result.prepend(e.getKey()); } } } return result; } public Collection getAllModules() { return modules.values(); } public Iterable getClassesForName(Name candidate) { return classes.getOrDefault(candidate, Collections.emptyMap()).values(); } public Iterable getPackagesForName(Name candidate) { return packages.getOrDefault(candidate, Collections.emptyMap()).values(); } }