/*
* Copyright (c) 2009, 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.comp;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Set;
import java.util.function.Consumer;
import java.util.function.Predicate;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Stream;
import javax.lang.model.SourceVersion;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileManager.Location;
import javax.tools.JavaFileObject;
import javax.tools.JavaFileObject.Kind;
import javax.tools.StandardLocation;
import com.sun.source.tree.ModuleTree.ModuleKind;
import com.sun.tools.javac.code.ClassFinder;
import com.sun.tools.javac.code.DeferredLintHandler;
import com.sun.tools.javac.code.Directive;
import com.sun.tools.javac.code.Directive.ExportsDirective;
import com.sun.tools.javac.code.Directive.ExportsFlag;
import com.sun.tools.javac.code.Directive.OpensDirective;
import com.sun.tools.javac.code.Directive.OpensFlag;
import com.sun.tools.javac.code.Directive.RequiresDirective;
import com.sun.tools.javac.code.Directive.RequiresFlag;
import com.sun.tools.javac.code.Directive.UsesDirective;
import com.sun.tools.javac.code.Flags;
import com.sun.tools.javac.code.Kinds;
import com.sun.tools.javac.code.Lint.LintCategory;
import com.sun.tools.javac.code.ModuleFinder;
import com.sun.tools.javac.code.Source;
import com.sun.tools.javac.code.Symbol;
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.ModuleFlags;
import com.sun.tools.javac.code.Symbol.ModuleSymbol;
import com.sun.tools.javac.code.Symbol.PackageSymbol;
import com.sun.tools.javac.code.Symtab;
import com.sun.tools.javac.code.Type;
import com.sun.tools.javac.code.Types;
import com.sun.tools.javac.jvm.ClassWriter;
import com.sun.tools.javac.jvm.JNIWriter;
import com.sun.tools.javac.main.Option;
import com.sun.tools.javac.resources.CompilerProperties.Errors;
import com.sun.tools.javac.resources.CompilerProperties.Warnings;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
import com.sun.tools.javac.tree.JCTree.JCDirective;
import com.sun.tools.javac.tree.JCTree.JCExports;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import com.sun.tools.javac.tree.JCTree.JCModuleDecl;
import com.sun.tools.javac.tree.JCTree.JCOpens;
import com.sun.tools.javac.tree.JCTree.JCPackageDecl;
import com.sun.tools.javac.tree.JCTree.JCProvides;
import com.sun.tools.javac.tree.JCTree.JCRequires;
import com.sun.tools.javac.tree.JCTree.JCUses;
import com.sun.tools.javac.tree.JCTree.Tag;
import com.sun.tools.javac.tree.TreeInfo;
import com.sun.tools.javac.util.Abort;
import com.sun.tools.javac.util.Assert;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.JCDiagnostic;
import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
import com.sun.tools.javac.util.List;
import com.sun.tools.javac.util.ListBuffer;
import com.sun.tools.javac.util.Log;
import com.sun.tools.javac.util.Name;
import com.sun.tools.javac.util.Names;
import com.sun.tools.javac.util.Options;
import com.sun.tools.javac.util.Position;
import static com.sun.tools.javac.code.Flags.ABSTRACT;
import static com.sun.tools.javac.code.Flags.ENUM;
import static com.sun.tools.javac.code.Flags.PUBLIC;
import static com.sun.tools.javac.code.Flags.UNATTRIBUTED;
import static com.sun.tools.javac.code.Kinds.Kind.MDL;
import static com.sun.tools.javac.code.Kinds.Kind.MTH;
import static com.sun.tools.javac.code.TypeTag.CLASS;
/**
* TODO: fill in
*
* <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 Modules extends JCTree.Visitor {
private static final String ALL_SYSTEM = "ALL-SYSTEM";
private static final String ALL_MODULE_PATH = "ALL-MODULE-PATH";
private final Log log;
private final Names names;
private final Symtab syms;
private final Attr attr;
private final Check chk;
private final DeferredLintHandler deferredLintHandler;
private final TypeEnvs typeEnvs;
private final Types types;
private final JavaFileManager fileManager;
private final ModuleFinder moduleFinder;
private final Source source;
private final boolean allowModules;
public final boolean multiModuleMode;
private final String moduleOverride;
private final Name java_se;
private final Name java_;
ModuleSymbol defaultModule;
private final String addExportsOpt;
private Map<ModuleSymbol, Set<ExportsDirective>> addExports;
private final String addReadsOpt;
private Map<ModuleSymbol, Set<RequiresDirective>> addReads;
private final String addModsOpt;
private final Set<String> extraAddMods = new HashSet<>();
private final String limitModsOpt;
private final Set<String> extraLimitMods = new HashSet<>();
private final boolean lintOptions;
private Set<ModuleSymbol> rootModules = null;
public static Modules instance(Context context) {
Modules instance = context.get(Modules.class);
if (instance == null)
instance = new Modules(context);
return instance;
}
protected Modules(Context context) {
context.put(Modules.class, this);
log = Log.instance(context);
names = Names.instance(context);
syms = Symtab.instance(context);
attr = Attr.instance(context);
chk = Check.instance(context);
deferredLintHandler = DeferredLintHandler.instance(context);
typeEnvs = TypeEnvs.instance(context);
moduleFinder = ModuleFinder.instance(context);
types = Types.instance(context);
fileManager = context.get(JavaFileManager.class);
source = Source.instance(context);
allowModules = source.allowModules();
Options options = Options.instance(context);
lintOptions = options.isUnset(Option.XLINT_CUSTOM, "-" + LintCategory.OPTIONS.option);
moduleOverride = options.get(Option.XMODULE);
multiModuleMode = fileManager.hasLocation(StandardLocation.MODULE_SOURCE_PATH);
ClassWriter classWriter = ClassWriter.instance(context);
classWriter.multiModuleMode = multiModuleMode;
JNIWriter jniWriter = JNIWriter.instance(context);
jniWriter.multiModuleMode = multiModuleMode;
java_se = names.fromString("java.se");
java_ = names.fromString("java.");
addExportsOpt = options.get(Option.ADD_EXPORTS);
addReadsOpt = options.get(Option.ADD_READS);
addModsOpt = options.get(Option.ADD_MODULES);
limitModsOpt = options.get(Option.LIMIT_MODULES);
}
int depth = -1;
private void dprintln(String msg) {
for (int i = 0; i < depth; i++)
System.err.print(" ");
System.err.println(msg);
}
public void addExtraAddModules(String... extras) {
extraAddMods.addAll(Arrays.asList(extras));
}
public void addExtraLimitModules(String... extras) {
extraLimitMods.addAll(Arrays.asList(extras));
}
boolean inInitModules;
public void initModules(List<JCCompilationUnit> trees) {
Assert.check(!inInitModules);
try {
inInitModules = true;
Assert.checkNull(rootModules);
enter(trees, modules -> {
Assert.checkNull(rootModules);
Assert.checkNull(allModules);
this.rootModules = modules;
setupAllModules(); //initialize the module graph
Assert.checkNonNull(allModules);
inInitModules = false;
}, null);
} finally {
inInitModules = false;
}
}
public boolean enter(List<JCCompilationUnit> trees, ClassSymbol c) {
Assert.check(rootModules != null || inInitModules || !allowModules);
return enter(trees, modules -> {}, c);
}
private boolean enter(List<JCCompilationUnit> trees, Consumer<Set<ModuleSymbol>> init, ClassSymbol c) {
if (!allowModules) {
for (JCCompilationUnit tree: trees) {
tree.modle = syms.noModule;
}
defaultModule = syms.noModule;
return true;
}
int startErrors = log.nerrors;
depth++;
try {
// scan trees for module defs
Set<ModuleSymbol> roots = enterModules(trees, c);
setCompilationUnitModules(trees, roots);
init.accept(roots);
for (ModuleSymbol msym: roots) {
msym.complete();
}
} catch (CompletionFailure ex) {
log.error(JCDiagnostic.DiagnosticFlag.NON_DEFERRABLE, Position.NOPOS, "cant.access", ex.sym, ex.getDetailValue());
if (ex instanceof ClassFinder.BadClassFile) throw new Abort();
} finally {
depth--;
}
return (log.nerrors == startErrors);
}
public Completer getCompleter() {
return mainCompleter;
}
public ModuleSymbol getDefaultModule() {
return defaultModule;
}
public boolean modulesInitialized() {
return allModules != null;
}
private Set<ModuleSymbol> enterModules(List<JCCompilationUnit> trees, ClassSymbol c) {
Set<ModuleSymbol> modules = new LinkedHashSet<>();
for (JCCompilationUnit tree : trees) {
JavaFileObject prev = log.useSource(tree.sourcefile);
try {
enterModule(tree, c, modules);
} finally {
log.useSource(prev);
}
}
return modules;
}
private void enterModule(JCCompilationUnit toplevel, ClassSymbol c, Set<ModuleSymbol> modules) {
boolean isModuleInfo = toplevel.sourcefile.isNameCompatible("module-info", Kind.SOURCE);
boolean isModuleDecl = toplevel.getModuleDecl() != null;
if (isModuleDecl) {
JCModuleDecl decl = toplevel.getModuleDecl();
if (!isModuleInfo) {
log.error(decl.pos(), Errors.ModuleDeclSbInModuleInfoJava);
}
Name name = TreeInfo.fullName(decl.qualId);
ModuleSymbol sym;
if (c != null) {
sym = (ModuleSymbol) c.owner;
Assert.checkNonNull(sym.name);
Name treeName = TreeInfo.fullName(decl.qualId);
if (sym.name != treeName) {
log.error(decl.pos(), Errors.ModuleNameMismatch(name, sym.name));
}
} else {
sym = syms.enterModule(name);
if (sym.module_info.sourcefile != null && sym.module_info.sourcefile != toplevel.sourcefile) {
log.error(decl.pos(), Errors.DuplicateModule(sym));
return;
}
}
sym.completer = getSourceCompleter(toplevel);
sym.module_info.sourcefile = toplevel.sourcefile;
decl.sym = sym;
if (multiModuleMode || modules.isEmpty()) {
modules.add(sym);
} else {
log.error(toplevel.pos(), Errors.TooManyModules);
}
Env<AttrContext> provisionalEnv = new Env<>(decl, null);
provisionalEnv.toplevel = toplevel;
typeEnvs.put(sym, provisionalEnv);
} else if (isModuleInfo) {
if (multiModuleMode) {
JCTree tree = toplevel.defs.isEmpty() ? toplevel : toplevel.defs.head;
log.error(tree.pos(), Errors.ExpectedModule);
}
}
}
private void setCompilationUnitModules(List<JCCompilationUnit> trees, Set<ModuleSymbol> rootModules) {
// update the module for each compilation unit
if (multiModuleMode) {
checkNoAllModulePath();
for (JCCompilationUnit tree: trees) {
if (tree.defs.isEmpty()) {
tree.modle = syms.unnamedModule;
continue;
}
JavaFileObject prev = log.useSource(tree.sourcefile);
try {
Location locn = getModuleLocation(tree);
if (locn != null) {
Name name = names.fromString(fileManager.inferModuleName(locn));
ModuleSymbol msym;
JCModuleDecl decl = tree.getModuleDecl();
if (decl != null) {
msym = decl.sym;
if (msym.name != name) {
log.error(decl.qualId, Errors.ModuleNameMismatch(msym.name, name));
}
} else {
msym = syms.enterModule(name);
}
if (msym.sourceLocation == null) {
msym.sourceLocation = locn;
if (fileManager.hasLocation(StandardLocation.CLASS_OUTPUT)) {
msym.classLocation = fileManager.getLocationForModule(
StandardLocation.CLASS_OUTPUT, msym.name.toString());
}
}
tree.modle = msym;
rootModules.add(msym);
} else {
log.error(tree.pos(), Errors.UnnamedPkgNotAllowedNamedModules);
tree.modle = syms.errModule;
}
} catch (IOException e) {
throw new Error(e); // FIXME
} finally {
log.useSource(prev);
}
}
if (syms.unnamedModule.sourceLocation == null) {
syms.unnamedModule.completer = getUnnamedModuleCompleter();
syms.unnamedModule.sourceLocation = StandardLocation.SOURCE_PATH;
syms.unnamedModule.classLocation = StandardLocation.CLASS_PATH;
}
defaultModule = syms.unnamedModule;
} else {
if (defaultModule == null) {
switch (rootModules.size()) {
case 0:
defaultModule = moduleFinder.findSingleModule();
if (defaultModule == syms.unnamedModule) {
if (moduleOverride != null) {
checkNoAllModulePath();
defaultModule = moduleFinder.findModule(names.fromString(moduleOverride));
defaultModule.sourceLocation = StandardLocation.SOURCE_PATH;
} else {
// Question: why not do findAllModules and initVisiblePackages here?
// i.e. body of unnamedModuleCompleter
defaultModule.completer = getUnnamedModuleCompleter();
defaultModule.classLocation = StandardLocation.CLASS_PATH;
}
} else {
checkSpecifiedModule(trees, Errors.ModuleInfoWithXmoduleClasspath);
checkNoAllModulePath();
defaultModule.complete();
// Question: why not do completeModule here?
defaultModule.completer = new Completer() {
@Override
public void complete(Symbol sym) throws CompletionFailure {
completeModule((ModuleSymbol) sym);
}
};
}
rootModules.add(defaultModule);
break;
case 1:
checkSpecifiedModule(trees, Errors.ModuleInfoWithXmoduleSourcepath);
checkNoAllModulePath();
defaultModule = rootModules.iterator().next();
defaultModule.classLocation = StandardLocation.CLASS_OUTPUT;
break;
default:
Assert.error("too many modules");
}
defaultModule.sourceLocation = StandardLocation.SOURCE_PATH;
} else if (rootModules.size() == 1 && defaultModule == rootModules.iterator().next()) {
defaultModule.complete();
defaultModule.completer = sym -> completeModule((ModuleSymbol) sym);
} else {
Assert.check(rootModules.isEmpty());
rootModules.add(defaultModule);
}
if (defaultModule != syms.unnamedModule) {
syms.unnamedModule.completer = getUnnamedModuleCompleter();
if (moduleOverride == null) {
syms.unnamedModule.sourceLocation = StandardLocation.SOURCE_PATH;
}
syms.unnamedModule.classLocation = StandardLocation.CLASS_PATH;
}
for (JCCompilationUnit tree: trees) {
tree.modle = defaultModule;
}
}
}
private Location getModuleLocation(JCCompilationUnit tree) throws IOException {
if (tree.getModuleDecl() != null) {
return getModuleLocation(tree.sourcefile, null);
} else if (tree.getPackage() != null) {
JCPackageDecl pkg = tree.getPackage();
return getModuleLocation(tree.sourcefile, TreeInfo.fullName(pkg.pid));
} else {
// code in unnamed module
return null;
}
}
private Location getModuleLocation(JavaFileObject fo, Name pkgName) throws IOException {
// For now, just check module source path.
// We may want to check source path as well.
return fileManager.getLocationForModule(StandardLocation.MODULE_SOURCE_PATH,
fo, (pkgName == null) ? null : pkgName.toString());
}
private void checkSpecifiedModule(List<JCCompilationUnit> trees, JCDiagnostic.Error error) {
if (moduleOverride != null) {
JavaFileObject prev = log.useSource(trees.head.sourcefile);
try {
log.error(trees.head.pos(), error);
} finally {
log.useSource(prev);
}
}
}
private void checkNoAllModulePath() {
if (addModsOpt != null && Arrays.asList(addModsOpt.split(",")).contains(ALL_MODULE_PATH)) {
log.error(Errors.AddmodsAllModulePathInvalid);
}
}
private final Completer mainCompleter = new Completer() {
@Override
public void complete(Symbol sym) throws CompletionFailure {
ModuleSymbol msym = moduleFinder.findModule((ModuleSymbol) sym);
if (msym.kind == Kinds.Kind.ERR) {
log.error(Errors.ModuleNotFound(msym));
//make sure the module is initialized:
msym.directives = List.nil();
msym.exports = List.nil();
msym.provides = List.nil();
msym.requires = List.nil();
msym.uses = List.nil();
} else if ((msym.flags_field & Flags.AUTOMATIC_MODULE) != 0) {
setupAutomaticModule(msym);
} else {
msym.module_info.complete();
}
// If module-info comes from a .java file, the underlying
// call of classFinder.fillIn will have called through the
// source completer, to Enter, and then to Modules.enter,
// which will call completeModule.
// But, if module-info comes from a .class file, the underlying
// call of classFinder.fillIn will just call ClassReader to read
// the .class file, and so we call completeModule here.
if (msym.module_info.classfile == null || msym.module_info.classfile.getKind() == Kind.CLASS) {
completeModule(msym);
}
}
@Override
public String toString() {
return "mainCompleter";
}
};
private void setupAutomaticModule(ModuleSymbol msym) throws CompletionFailure {
try {
ListBuffer<Directive> directives = new ListBuffer<>();
ListBuffer<ExportsDirective> exports = new ListBuffer<>();
Set<String> seenPackages = new HashSet<>();
for (JavaFileObject clazz : fileManager.list(msym.classLocation, "", EnumSet.of(Kind.CLASS), true)) {
String binName = fileManager.inferBinaryName(msym.classLocation, clazz);
String pack = binName.lastIndexOf('.') != (-1) ? binName.substring(0, binName.lastIndexOf('.')) : ""; //unnamed package????
if (seenPackages.add(pack)) {
ExportsDirective d = new ExportsDirective(syms.enterPackage(msym, names.fromString(pack)), null);
//TODO: opens?
directives.add(d);
exports.add(d);
}
}
msym.exports = exports.toList();
msym.provides = List.nil();
msym.requires = List.nil();
msym.uses = List.nil();
msym.directives = directives.toList();
msym.flags_field |= Flags.ACYCLIC;
} catch (IOException ex) {
throw new IllegalStateException(ex);
}
}
private void completeAutomaticModule(ModuleSymbol msym) throws CompletionFailure {
ListBuffer<Directive> directives = new ListBuffer<>();
directives.addAll(msym.directives);
ListBuffer<RequiresDirective> requires = new ListBuffer<>();
for (ModuleSymbol ms : allModules()) {
if (ms == syms.unnamedModule || ms == msym)
continue;
Set<RequiresFlag> flags = (ms.flags_field & Flags.AUTOMATIC_MODULE) != 0 ?
EnumSet.of(RequiresFlag.TRANSITIVE) : EnumSet.noneOf(RequiresFlag.class);
RequiresDirective d = new RequiresDirective(ms, flags);
directives.add(d);
requires.add(d);
}
RequiresDirective requiresUnnamed = new RequiresDirective(syms.unnamedModule);
directives.add(requiresUnnamed);
requires.add(requiresUnnamed);
msym.requires = requires.toList();
msym.directives = directives.toList();
}
private Completer getSourceCompleter(JCCompilationUnit tree) {
return new Completer() {
@Override
public void complete(Symbol sym) throws CompletionFailure {
ModuleSymbol msym = (ModuleSymbol) sym;
msym.flags_field |= UNATTRIBUTED;
ModuleVisitor v = new ModuleVisitor();
JavaFileObject prev = log.useSource(tree.sourcefile);
try {
JCModuleDecl moduleDecl = tree.getModuleDecl();
moduleDecl.accept(v);
completeModule(msym);
checkCyclicDependencies(moduleDecl);
} finally {
log.useSource(prev);
msym.flags_field &= ~UNATTRIBUTED;
}
}
@Override
public String toString() {
return "SourceCompleter: " + tree.sourcefile.getName();
}
};
}
class ModuleVisitor extends JCTree.Visitor {
private ModuleSymbol sym;
private final Set<ModuleSymbol> allRequires = new HashSet<>();
private final Map<PackageSymbol,List<ExportsDirective>> allExports = new HashMap<>();
private final Map<PackageSymbol,List<OpensDirective>> allOpens = new HashMap<>();
@Override
public void visitModuleDef(JCModuleDecl tree) {
sym = Assert.checkNonNull(tree.sym);
if (tree.getModuleType() == ModuleKind.OPEN) {
sym.flags.add(ModuleFlags.OPEN);
}
sym.flags_field |= (tree.mods.flags & Flags.DEPRECATED);
sym.requires = List.nil();
sym.exports = List.nil();
sym.opens = List.nil();
tree.directives.forEach(t -> t.accept(this));
sym.requires = sym.requires.reverse();
sym.exports = sym.exports.reverse();
sym.opens = sym.opens.reverse();
ensureJavaBase();
}
@Override
public void visitRequires(JCRequires tree) {
ModuleSymbol msym = lookupModule(tree.moduleName);
if (msym.kind != MDL) {
log.error(tree.moduleName.pos(), Errors.ModuleNotFound(msym));
} else if (allRequires.contains(msym)) {
log.error(tree.moduleName.pos(), Errors.DuplicateRequires(msym));
} else {
allRequires.add(msym);
Set<RequiresFlag> flags = EnumSet.noneOf(RequiresFlag.class);
if (tree.isTransitive)
flags.add(RequiresFlag.TRANSITIVE);
if (tree.isStaticPhase)
flags.add(RequiresFlag.STATIC_PHASE);
RequiresDirective d = new RequiresDirective(msym, flags);
tree.directive = d;
sym.requires = sym.requires.prepend(d);
}
}
@Override
public void visitExports(JCExports tree) {
Name name = TreeInfo.fullName(tree.qualid);
PackageSymbol packge = syms.enterPackage(sym, name);
attr.setPackageSymbols(tree.qualid, packge);
if (tree.hasTag(Tag.OPENS) && sym.flags.contains(ModuleFlags.OPEN)) {
log.error(tree.pos(), Errors.NoOpensUnlessStrong);
}
List<ExportsDirective> exportsForPackage = allExports.computeIfAbsent(packge, p -> List.nil());
for (ExportsDirective d : exportsForPackage) {
reportExportsConflict(tree, packge);
}
List<ModuleSymbol> toModules = null;
if (tree.moduleNames != null) {
Set<ModuleSymbol> to = new LinkedHashSet<>();
for (JCExpression n: tree.moduleNames) {
ModuleSymbol msym = lookupModule(n);
if (msym.kind != MDL) {
log.error(n.pos(), Errors.ModuleNotFound(msym));
} else {
for (ExportsDirective d : exportsForPackage) {
checkDuplicateExportsToModule(n, msym, d);
}
if (!to.add(msym)) {
reportExportsConflictToModule(n, msym);
}
}
}
toModules = List.from(to);
}
if (toModules == null || !toModules.isEmpty()) {
Set<ExportsFlag> flags = EnumSet.noneOf(ExportsFlag.class);
ExportsDirective d = new ExportsDirective(packge, toModules, flags);
sym.exports = sym.exports.prepend(d);
tree.directive = d;
allExports.put(packge, exportsForPackage.prepend(d));
}
}
private void reportExportsConflict(JCExports tree, PackageSymbol packge) {
log.error(tree.qualid.pos(), Errors.ConflictingExports(packge));
}
private void checkDuplicateExportsToModule(JCExpression name, ModuleSymbol msym,
ExportsDirective d) {
if (d.modules != null) {
for (ModuleSymbol other : d.modules) {
if (msym == other) {
reportExportsConflictToModule(name, msym);
}
}
}
}
private void reportExportsConflictToModule(JCExpression name, ModuleSymbol msym) {
log.error(name.pos(), Errors.ConflictingExportsToModule(msym));
}
@Override
public void visitOpens(JCOpens tree) {
Name name = TreeInfo.fullName(tree.qualid);
PackageSymbol packge = syms.enterPackage(sym, name);
attr.setPackageSymbols(tree.qualid, packge);
if (sym.flags.contains(ModuleFlags.OPEN)) {
log.error(tree.pos(), Errors.NoOpensUnlessStrong);
}
List<OpensDirective> opensForPackage = allOpens.computeIfAbsent(packge, p -> List.nil());
for (OpensDirective d : opensForPackage) {
reportOpensConflict(tree, packge);
}
List<ModuleSymbol> toModules = null;
if (tree.moduleNames != null) {
Set<ModuleSymbol> to = new LinkedHashSet<>();
for (JCExpression n: tree.moduleNames) {
ModuleSymbol msym = lookupModule(n);
if (msym.kind != MDL) {
log.error(n.pos(), Errors.ModuleNotFound(msym));
} else {
for (OpensDirective d : opensForPackage) {
checkDuplicateOpensToModule(n, msym, d);
}
if (!to.add(msym)) {
reportOpensConflictToModule(n, msym);
}
}
}
toModules = List.from(to);
}
if (toModules == null || !toModules.isEmpty()) {
Set<OpensFlag> flags = EnumSet.noneOf(OpensFlag.class);
OpensDirective d = new OpensDirective(packge, toModules, flags);
sym.opens = sym.opens.prepend(d);
tree.directive = d;
allOpens.put(packge, opensForPackage.prepend(d));
}
}
private void reportOpensConflict(JCOpens tree, PackageSymbol packge) {
log.error(tree.qualid.pos(), Errors.ConflictingOpens(packge));
}
private void checkDuplicateOpensToModule(JCExpression name, ModuleSymbol msym,
OpensDirective d) {
if (d.modules != null) {
for (ModuleSymbol other : d.modules) {
if (msym == other) {
reportOpensConflictToModule(name, msym);
}
}
}
}
private void reportOpensConflictToModule(JCExpression name, ModuleSymbol msym) {
log.error(name.pos(), Errors.ConflictingOpensToModule(msym));
}
@Override
public void visitProvides(JCProvides tree) { }
@Override
public void visitUses(JCUses tree) { }
private void ensureJavaBase() {
if (sym.name == names.java_base)
return;
for (RequiresDirective d: sym.requires) {
if (d.module.name == names.java_base)
return;
}
ModuleSymbol java_base = syms.enterModule(names.java_base);
Directive.RequiresDirective d =
new Directive.RequiresDirective(java_base,
EnumSet.of(Directive.RequiresFlag.MANDATED));
sym.requires = sym.requires.prepend(d);
}
private ModuleSymbol lookupModule(JCExpression moduleName) {
Name name = TreeInfo.fullName(moduleName);
ModuleSymbol msym = moduleFinder.findModule(name);
TreeInfo.setSymbol(moduleName, msym);
return msym;
}
}
public Completer getUsesProvidesCompleter() {
return sym -> {
ModuleSymbol msym = (ModuleSymbol) sym;
msym.complete();
Env<AttrContext> env = typeEnvs.get(msym);
UsesProvidesVisitor v = new UsesProvidesVisitor(msym, env);
JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
JCModuleDecl decl = env.toplevel.getModuleDecl();
DiagnosticPosition prevLintPos = deferredLintHandler.setPos(decl.pos());
try {
decl.accept(v);
} finally {
log.useSource(prev);
deferredLintHandler.setPos(prevLintPos);
}
};
}
class UsesProvidesVisitor extends JCTree.Visitor {
private final ModuleSymbol msym;
private final Env<AttrContext> env;
private final Set<ClassSymbol> allUses = new HashSet<>();
private final Map<ClassSymbol, Set<ClassSymbol>> allProvides = new HashMap<>();
public UsesProvidesVisitor(ModuleSymbol msym, Env<AttrContext> env) {
this.msym = msym;
this.env = env;
}
@Override @SuppressWarnings("unchecked")
public void visitModuleDef(JCModuleDecl tree) {
msym.directives = List.nil();
msym.provides = List.nil();
msym.uses = List.nil();
tree.directives.forEach(t -> t.accept(this));
msym.directives = msym.directives.reverse();
msym.provides = msym.provides.reverse();
msym.uses = msym.uses.reverse();
if (msym.requires.nonEmpty() && msym.requires.head.flags.contains(RequiresFlag.MANDATED))
msym.directives = msym.directives.prepend(msym.requires.head);
msym.directives = msym.directives.appendList(List.from(addReads.getOrDefault(msym, Collections.emptySet())));
checkForCorrectness();
}
@Override
public void visitExports(JCExports tree) {
if (tree.directive.packge.members().isEmpty()) {
log.error(tree.qualid.pos(), Errors.PackageEmptyOrNotFound(tree.directive.packge));
}
msym.directives = msym.directives.prepend(tree.directive);
}
@Override
public void visitOpens(JCOpens tree) {
if (tree.directive.packge.members().isEmpty() &&
((tree.directive.packge.flags() & Flags.HAS_RESOURCE) == 0)) {
log.error(tree.qualid.pos(), Errors.PackageEmptyOrNotFound(tree.directive.packge));
}
msym.directives = msym.directives.prepend(tree.directive);
}
MethodSymbol noArgsConstructor(ClassSymbol tsym) {
for (Symbol sym : tsym.members().getSymbolsByName(names.init)) {
MethodSymbol mSym = (MethodSymbol)sym;
if (mSym.params().isEmpty()) {
return mSym;
}
}
return null;
}
MethodSymbol factoryMethod(ClassSymbol tsym) {
for (Symbol sym : tsym.members().getSymbolsByName(names.provider, sym -> sym.kind == MTH)) {
MethodSymbol mSym = (MethodSymbol)sym;
if (mSym.isStatic() && (mSym.flags() & Flags.PUBLIC) != 0 && mSym.params().isEmpty()) {
return mSym;
}
}
return null;
}
Map<Directive.ProvidesDirective, JCProvides> directiveToTreeMap = new HashMap<>();
@Override
public void visitProvides(JCProvides tree) {
Type st = attr.attribType(tree.serviceName, env, syms.objectType);
ClassSymbol service = (ClassSymbol) st.tsym;
ListBuffer<ClassSymbol> impls = new ListBuffer<>();
for (JCExpression implName : tree.implNames) {
Type it = attr.attribType(implName, env, syms.objectType);
ClassSymbol impl = (ClassSymbol) it.tsym;
//find provider factory:
MethodSymbol factory = factoryMethod(impl);
if (factory != null) {
Type returnType = factory.type.getReturnType();
if (!types.isSubtype(returnType, st)) {
log.error(implName.pos(), Errors.ServiceImplementationProviderReturnMustBeSubtypeOfServiceInterface);
}
} else {
if (!types.isSubtype(it, st)) {
log.error(implName.pos(), Errors.ServiceImplementationMustBeSubtypeOfServiceInterface);
} else if ((impl.flags() & ABSTRACT) != 0) {
log.error(implName.pos(), Errors.ServiceImplementationIsAbstract(impl));
} else if (impl.isInner()) {
log.error(implName.pos(), Errors.ServiceImplementationIsInner(impl));
} else {
MethodSymbol constr = noArgsConstructor(impl);
if (constr == null) {
log.error(implName.pos(), Errors.ServiceImplementationDoesntHaveANoArgsConstructor(impl));
} else if ((constr.flags() & PUBLIC) == 0) {
log.error(implName.pos(), Errors.ServiceImplementationNoArgsConstructorNotPublic(impl));
}
}
}
if (it.hasTag(CLASS)) {
// For now, we just check the pair (service-type, impl-type) is unique
// TODO, check only one provides per service type as well
if (allProvides.computeIfAbsent(service, s -> new HashSet<>()).add(impl)) {
impls.append(impl);
} else {
log.error(implName.pos(), Errors.DuplicateProvides(service, impl));
}
}
}
if (st.hasTag(CLASS) && !impls.isEmpty()) {
Directive.ProvidesDirective d = new Directive.ProvidesDirective(service, impls.toList());
msym.provides = msym.provides.prepend(d);
msym.directives = msym.directives.prepend(d);
directiveToTreeMap.put(d, tree);
}
}
@Override
public void visitRequires(JCRequires tree) {
if (tree.directive != null) {
chk.checkDeprecated(tree.moduleName.pos(), msym, tree.directive.module);
msym.directives = msym.directives.prepend(tree.directive);
}
}
@Override
public void visitUses(JCUses tree) {
Type st = attr.attribType(tree.qualid, env, syms.objectType);
Symbol sym = TreeInfo.symbol(tree.qualid);
if ((sym.flags() & ENUM) != 0) {
log.error(tree.qualid.pos(), Errors.ServiceDefinitionIsEnum(st.tsym));
} else if (st.hasTag(CLASS)) {
ClassSymbol service = (ClassSymbol) st.tsym;
if (allUses.add(service)) {
Directive.UsesDirective d = new Directive.UsesDirective(service);
msym.uses = msym.uses.prepend(d);
msym.directives = msym.directives.prepend(d);
} else {
log.error(tree.pos(), Errors.DuplicateUses(service));
}
}
}
private void checkForCorrectness() {
for (Directive.ProvidesDirective provides : msym.provides) {
JCProvides tree = directiveToTreeMap.get(provides);
for (ClassSymbol impl : provides.impls) {
/* The implementation must be defined in the same module as the provides directive
* (else, error)
*/
PackageSymbol implementationDefiningPackage = impl.packge();
if (implementationDefiningPackage.modle != msym) {
// TODO: should use tree for the implentation name, not the entire provides tree
// TODO: should improve error message to identify the implementation type
log.error(tree.pos(), Errors.ServiceImplementationNotInRightModule(implementationDefiningPackage.modle));
}
/* There is no inherent requirement that module that provides a service should actually
* use it itself. However, it is a pointless declaration if the service package is not
* exported and there is no uses for the service.
*/
PackageSymbol interfaceDeclaringPackage = provides.service.packge();
boolean isInterfaceDeclaredInCurrentModule = interfaceDeclaringPackage.modle == msym;
boolean isInterfaceExportedFromAReadableModule =
msym.visiblePackages.get(interfaceDeclaringPackage.fullname) == interfaceDeclaringPackage;
if (isInterfaceDeclaredInCurrentModule && !isInterfaceExportedFromAReadableModule) {
// ok the interface is declared in this module. Let's check if it's exported
boolean warn = true;
for (ExportsDirective export : msym.exports) {
if (interfaceDeclaringPackage == export.packge) {
warn = false;
break;
}
}
if (warn) {
for (UsesDirective uses : msym.uses) {
if (provides.service == uses.service) {
warn = false;
break;
}
}
}
if (warn) {
log.warning(tree.pos(), Warnings.ServiceProvidedButNotExportedOrUsed(provides.service));
}
}
}
}
}
}
private Set<ModuleSymbol> allModules;
public Set<ModuleSymbol> allModules() {
Assert.checkNonNull(allModules);
return allModules;
}
private void setupAllModules() {
Assert.checkNonNull(rootModules);
Assert.checkNull(allModules);
Set<ModuleSymbol> observable;
if (limitModsOpt == null && extraLimitMods.isEmpty()) {
observable = null;
} else {
Set<ModuleSymbol> limitMods = new HashSet<>();
if (limitModsOpt != null) {
for (String limit : limitModsOpt.split(",")) {
if (!isValidName(limit))
continue;
limitMods.add(syms.enterModule(names.fromString(limit)));
}
}
for (String limit : extraLimitMods) {
limitMods.add(syms.enterModule(names.fromString(limit)));
}
observable = computeTransitiveClosure(limitMods, null);
observable.addAll(rootModules);
if (lintOptions) {
for (ModuleSymbol msym : limitMods) {
if (!observable.contains(msym)) {
log.warning(LintCategory.OPTIONS,
Warnings.ModuleForOptionNotFound(Option.LIMIT_MODULES, msym));
}
}
}
}
Predicate<ModuleSymbol> observablePred = sym -> observable == null || observable.contains(sym);
Predicate<ModuleSymbol> systemModulePred = sym -> (sym.flags() & Flags.SYSTEM_MODULE) != 0;
Set<ModuleSymbol> enabledRoot = new LinkedHashSet<>();
if (rootModules.contains(syms.unnamedModule)) {
ModuleSymbol javaSE = syms.getModule(java_se);
Predicate<ModuleSymbol> jdkModulePred;
if (javaSE != null && (observable == null || observable.contains(javaSE))) {
jdkModulePred = sym -> {
sym.complete();
return !sym.name.startsWith(java_)
&& sym.exports.stream().anyMatch(e -> e.modules == null);
};
enabledRoot.add(javaSE);
} else {
jdkModulePred = sym -> true;
}
for (ModuleSymbol sym : new HashSet<>(syms.getAllModules())) {
if (systemModulePred.test(sym) && observablePred.test(sym) && jdkModulePred.test(sym)) {
enabledRoot.add(sym);
}
}
}
enabledRoot.addAll(rootModules);
if (addModsOpt != null || !extraAddMods.isEmpty()) {
Set<String> fullAddMods = new HashSet<>();
fullAddMods.addAll(extraAddMods);
if (addModsOpt != null) {
fullAddMods.addAll(Arrays.asList(addModsOpt.split(",")));
}
for (String added : fullAddMods) {
Stream<ModuleSymbol> modules;
switch (added) {
case ALL_SYSTEM:
modules = syms.getAllModules()
.stream()
.filter(systemModulePred.and(observablePred));
break;
case ALL_MODULE_PATH:
modules = syms.getAllModules()
.stream()
.filter(systemModulePred.negate().and(observablePred));
break;
default:
if (!isValidName(added))
continue;
modules = Stream.of(syms.enterModule(names.fromString(added)));
break;
}
modules.forEach(sym -> {
enabledRoot.add(sym);
if (observable != null)
observable.add(sym);
});
}
}
Set<ModuleSymbol> result = computeTransitiveClosure(enabledRoot, observable);
result.add(syms.unnamedModule);
allModules = result;
}
public boolean isInModuleGraph(ModuleSymbol msym) {
return allModules == null || allModules.contains(msym);
}
private Set<ModuleSymbol> computeTransitiveClosure(Iterable<? extends ModuleSymbol> base, Set<ModuleSymbol> observable) {
List<ModuleSymbol> todo = List.nil();
for (ModuleSymbol ms : base) {
todo = todo.prepend(ms);
}
Set<ModuleSymbol> result = new LinkedHashSet<>();
result.add(syms.java_base);
while (todo.nonEmpty()) {
ModuleSymbol current = todo.head;
todo = todo.tail;
if (observable != null && !observable.contains(current))
continue;
if (!result.add(current) || current == syms.unnamedModule || ((current.flags_field & Flags.AUTOMATIC_MODULE) != 0))
continue;
current.complete();
for (RequiresDirective rd : current.requires) {
todo = todo.prepend(rd.module);
}
}
return result;
}
public ModuleSymbol getObservableModule(Name name) {
ModuleSymbol mod = syms.getModule(name);
if (allModules().contains(mod)) {
return mod;
}
return null;
}
private Completer getUnnamedModuleCompleter() {
moduleFinder.findAllModules();
return new Symbol.Completer() {
@Override
public void complete(Symbol sym) throws CompletionFailure {
if (inInitModules) {
sym.completer = this;
return ;
}
ModuleSymbol msym = (ModuleSymbol) sym;
Set<ModuleSymbol> allModules = new HashSet<>(allModules());
allModules.remove(syms.unnamedModule);
for (ModuleSymbol m : allModules) {
m.complete();
}
initVisiblePackages(msym, allModules);
}
@Override
public String toString() {
return "unnamedModule Completer";
}
};
}
private final Map<ModuleSymbol, Set<ModuleSymbol>> requiresTransitiveCache = new HashMap<>();
private void completeModule(ModuleSymbol msym) {
if (inInitModules) {
msym.completer = sym -> completeModule(msym);
return ;
}
if ((msym.flags_field & Flags.AUTOMATIC_MODULE) != 0) {
completeAutomaticModule(msym);
}
Assert.checkNonNull(msym.requires);
initAddReads();
msym.requires = msym.requires.appendList(List.from(addReads.getOrDefault(msym, Collections.emptySet())));
List<RequiresDirective> requires = msym.requires;
List<RequiresDirective> previous = null;
while (requires.nonEmpty()) {
if (!allModules().contains(requires.head.module)) {
Env<AttrContext> env = typeEnvs.get(msym);
if (env != null) {
JavaFileObject origSource = log.useSource(env.toplevel.sourcefile);
try {
log.error(/*XXX*/env.tree, Errors.ModuleNotFound(requires.head.module));
} finally {
log.useSource(origSource);
}
} else {
Assert.check((msym.flags() & Flags.AUTOMATIC_MODULE) == 0);
}
if (previous != null) {
previous.tail = requires.tail;
} else {
msym.requires.tail = requires.tail;
}
} else {
previous = requires;
}
requires = requires.tail;
}
Set<ModuleSymbol> readable = new LinkedHashSet<>();
Set<ModuleSymbol> requiresTransitive = new HashSet<>();
for (RequiresDirective d : msym.requires) {
d.module.complete();
readable.add(d.module);
Set<ModuleSymbol> s = retrieveRequiresTransitive(d.module);
Assert.checkNonNull(s, () -> "no entry in cache for " + d.module);
readable.addAll(s);
if (d.flags.contains(RequiresFlag.TRANSITIVE)) {
requiresTransitive.add(d.module);
requiresTransitive.addAll(s);
}
}
requiresTransitiveCache.put(msym, requiresTransitive);
initVisiblePackages(msym, readable);
for (ExportsDirective d: msym.exports) {
if (d.packge != null) {
d.packge.modle = msym;
}
}
}
private Set<ModuleSymbol> retrieveRequiresTransitive(ModuleSymbol msym) {
Set<ModuleSymbol> requiresTransitive = requiresTransitiveCache.get(msym);
if (requiresTransitive == null) {
//the module graph may contain cycles involving automatic modules or --add-reads edges
requiresTransitive = new HashSet<>();
Set<ModuleSymbol> seen = new HashSet<>();
List<ModuleSymbol> todo = List.of(msym);
while (todo.nonEmpty()) {
ModuleSymbol current = todo.head;
todo = todo.tail;
if (!seen.add(current))
continue;
requiresTransitive.add(current);
current.complete();
Iterable<? extends RequiresDirective> requires;
if (current != syms.unnamedModule) {
Assert.checkNonNull(current.requires, () -> current + ".requires == null; " + msym);
requires = current.requires;
for (RequiresDirective rd : requires) {
if (rd.isTransitive())
todo = todo.prepend(rd.module);
}
} else {
for (ModuleSymbol mod : allModules()) {
todo = todo.prepend(mod);
}
}
}
requiresTransitive.remove(msym);
}
return requiresTransitive;
}
private void initVisiblePackages(ModuleSymbol msym, Collection<ModuleSymbol> readable) {
initAddExports();
msym.visiblePackages = new LinkedHashMap<>();
Map<Name, ModuleSymbol> seen = new HashMap<>();
for (ModuleSymbol rm : readable) {
if (rm == syms.unnamedModule)
continue;
addVisiblePackages(msym, seen, rm, rm.exports);
}
addExports.forEach((exportsFrom, exports) -> {
addVisiblePackages(msym, seen, exportsFrom, exports);
});
}
private void addVisiblePackages(ModuleSymbol msym,
Map<Name, ModuleSymbol> seenPackages,
ModuleSymbol exportsFrom,
Collection<ExportsDirective> exports) {
for (ExportsDirective d : exports) {
if (d.modules == null || d.modules.contains(msym)) {
Name packageName = d.packge.fullname;
ModuleSymbol previousModule = seenPackages.get(packageName);
if (previousModule != null && previousModule != exportsFrom) {
Env<AttrContext> env = typeEnvs.get(msym);
JavaFileObject origSource = env != null ? log.useSource(env.toplevel.sourcefile)
: null;
DiagnosticPosition pos = env != null ? env.tree.pos() : null;
try {
log.error(pos, Errors.PackageClashFromRequires(msym, packageName,
previousModule, exportsFrom));
} finally {
if (env != null)
log.useSource(origSource);
}
continue;
}
seenPackages.put(packageName, exportsFrom);
msym.visiblePackages.put(d.packge.fullname, d.packge);
}
}
}
private void initAddExports() {
if (addExports != null)
return;
addExports = new LinkedHashMap<>();
Set<ModuleSymbol> unknownModules = new HashSet<>();
if (addExportsOpt == null)
return;
Pattern ep = Pattern.compile("([^/]+)/([^=]+)=(.*)");
for (String s: addExportsOpt.split("\0+")) {
if (s.isEmpty())
continue;
Matcher em = ep.matcher(s);
if (!em.matches()) {
continue;
}
// Terminology comes from
// --add-exports module/package=target,...
// Compare to
// module module { exports package to target, ... }
String moduleName = em.group(1);
String packageName = em.group(2);
String targetNames = em.group(3);
if (!isValidName(moduleName))
continue;
ModuleSymbol msym = syms.enterModule(names.fromString(moduleName));
if (!isKnownModule(msym, unknownModules))
continue;
if (!isValidName(packageName))
continue;
PackageSymbol p = syms.enterPackage(msym, names.fromString(packageName));
p.modle = msym; // TODO: do we need this?
List<ModuleSymbol> targetModules = List.nil();
for (String toModule : targetNames.split("[ ,]+")) {
ModuleSymbol m;
if (toModule.equals("ALL-UNNAMED")) {
m = syms.unnamedModule;
} else {
if (!isValidName(toModule))
continue;
m = syms.enterModule(names.fromString(toModule));
if (!isKnownModule(m, unknownModules))
continue;
}
targetModules = targetModules.prepend(m);
}
Set<ExportsDirective> extra = addExports.computeIfAbsent(msym, _x -> new LinkedHashSet<>());
ExportsDirective d = new ExportsDirective(p, targetModules);
extra.add(d);
}
}
private boolean isKnownModule(ModuleSymbol msym, Set<ModuleSymbol> unknownModules) {
if (allModules.contains(msym)) {
return true;
}
if (!unknownModules.contains(msym)) {
if (lintOptions) {
log.warning(LintCategory.OPTIONS,
Warnings.ModuleForOptionNotFound(Option.ADD_EXPORTS, msym));
}
unknownModules.add(msym);
}
return false;
}
private void initAddReads() {
if (addReads != null)
return;
addReads = new LinkedHashMap<>();
if (addReadsOpt == null)
return;
Pattern rp = Pattern.compile("([^=]+)=(.*)");
for (String s : addReadsOpt.split("\0+")) {
if (s.isEmpty())
continue;
Matcher rm = rp.matcher(s);
if (!rm.matches()) {
continue;
}
// Terminology comes from
// --add-reads source-module=target-module,...
// Compare to
// module source-module { requires target-module; ... }
String sourceName = rm.group(1);
String targetNames = rm.group(2);
if (!isValidName(sourceName))
continue;
ModuleSymbol msym = syms.enterModule(names.fromString(sourceName));
if (!allModules.contains(msym)) {
if (lintOptions) {
log.warning(Warnings.ModuleForOptionNotFound(Option.ADD_READS, msym));
}
continue;
}
for (String targetName : targetNames.split("[ ,]+", -1)) {
ModuleSymbol targetModule;
if (targetName.equals("ALL-UNNAMED")) {
targetModule = syms.unnamedModule;
} else {
if (!isValidName(targetName))
continue;
targetModule = syms.enterModule(names.fromString(targetName));
if (!allModules.contains(targetModule)) {
if (lintOptions) {
log.warning(LintCategory.OPTIONS, Warnings.ModuleForOptionNotFound(Option.ADD_READS, targetModule));
}
continue;
}
}
addReads.computeIfAbsent(msym, m -> new HashSet<>())
.add(new RequiresDirective(targetModule, EnumSet.of(RequiresFlag.EXTRA)));
}
}
}
private void checkCyclicDependencies(JCModuleDecl mod) {
for (JCDirective d : mod.directives) {
JCRequires rd;
if (!d.hasTag(Tag.REQUIRES) || (rd = (JCRequires) d).directive == null)
continue;
Set<ModuleSymbol> nonSyntheticDeps = new HashSet<>();
List<ModuleSymbol> queue = List.of(rd.directive.module);
while (queue.nonEmpty()) {
ModuleSymbol current = queue.head;
queue = queue.tail;
if (!nonSyntheticDeps.add(current))
continue;
current.complete();
if ((current.flags() & Flags.ACYCLIC) != 0)
continue;
Assert.checkNonNull(current.requires, () -> current.toString());
for (RequiresDirective dep : current.requires) {
if (!dep.flags.contains(RequiresFlag.EXTRA))
queue = queue.prepend(dep.module);
}
}
if (nonSyntheticDeps.contains(mod.sym)) {
log.error(rd.moduleName.pos(), Errors.CyclicRequires(rd.directive.module));
}
mod.sym.flags_field |= Flags.ACYCLIC;
}
}
private boolean isValidName(CharSequence name) {
return SourceVersion.isName(name, Source.toSourceVersion(source));
}
// DEBUG
private String toString(ModuleSymbol msym) {
return msym.name + "["
+ "kind:" + msym.kind + ";"
+ "locn:" + toString(msym.sourceLocation) + "," + toString(msym.classLocation) + ";"
+ "info:" + toString(msym.module_info.sourcefile) + ","
+ toString(msym.module_info.classfile) + ","
+ msym.module_info.completer
+ "]";
}
// DEBUG
String toString(Location locn) {
return (locn == null) ? "--" : locn.getName();
}
// DEBUG
String toString(JavaFileObject fo) {
return (fo == null) ? "--" : fo.getName();
}
public void newRound() {
rootModules = null;
allModules = null;
}
}