8234025: Elements.getPackageElement(ModuleElement,CharSequence) returns null for unnamed package
Reviewed-by: jlahoda
/*
* 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
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*/
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.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 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;
/** 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<>();
private final Map<Types.UniqueType, VarSymbol> 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);
rootPackage = new RootPackageSymbol(names.empty, null, missingInfoHandler);
// 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 (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");
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");
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);
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<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();
}
}