jdk-sandbox: comparison langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/TypeEnter.java

equal deleted inserted replaced

-:d4711a6931e2
+:7e913a535736
+/*
+* Copyright (c) 2003, 2014, 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.util.HashSet;
+import java.util.Set;
+import javax.tools.JavaFileObject;
+import com.sun.tools.javac.code.*;
+import com.sun.tools.javac.code.Lint.LintCategory;
+import com.sun.tools.javac.code.Scope.ImportFilter;
+import com.sun.tools.javac.code.Scope.NamedImportScope;
+import com.sun.tools.javac.code.Scope.StarImportScope;
+import com.sun.tools.javac.code.Scope.WriteableScope;
+import com.sun.tools.javac.tree.*;
+import com.sun.tools.javac.util.*;
+import com.sun.tools.javac.util.DefinedBy.Api;
+import com.sun.tools.javac.code.Symbol.*;
+import com.sun.tools.javac.code.Type.*;
+import com.sun.tools.javac.tree.JCTree.*;
+import static com.sun.tools.javac.code.Flags.*;
+import static com.sun.tools.javac.code.Flags.ANNOTATION;
+import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE;
+import static com.sun.tools.javac.code.Kinds.Kind.*;
+import static com.sun.tools.javac.code.TypeTag.CLASS;
+import static com.sun.tools.javac.code.TypeTag.ERROR;
+import static com.sun.tools.javac.tree.JCTree.Tag.*;
+import com.sun.tools.javac.util.Dependencies.AttributionKind;
+import com.sun.tools.javac.util.Dependencies.CompletionCause;
+import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;
+import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
+/** This is the second phase of Enter, in which classes are completed
+*  by resolving their headers and entering their members in the into
+*  the class scope. See Enter for an overall overview.
+*
+*  This class uses internal phases to process the classes. When a phase
+*  processes classes, the lower phases are not invoked until all classes
+*  pass through the current phase. Note that it is possible that upper phases
+*  are run due to recursive completion. The internal phases are:
+*  - ImportPhase: shallow pass through imports, adds information about imports
+*                 the NamedImportScope and StarImportScope, but avoids queries
+*                 about class hierarchy.
+*  - HierarchyPhase: resolves the supertypes of the given class. Does not handle
+*                    type parameters of the class or type argument of the supertypes.
+*  - HeaderPhase: finishes analysis of the header of the given class by resolving
+*                 type parameters, attributing supertypes including type arguments
+*                 and scheduling full annotation attribution. This phase also adds
+*                 a synthetic default constructor if needed and synthetic "this" field.
+*  - MembersPhase: resolves headers for fields, methods and constructors in the given class.
+*                  Also generates synthetic enum members.
+*
+*  <p><b>This is NOT part of any supported API.
+*  If you write code that depends on this, you do so at your own risk.
+*  This code and its internal interfaces are subject to change or
+*  deletion without notice.</b>
+*/
+public class TypeEnter implements Completer {
+protected static final Context.Key<TypeEnter> typeEnterKey = new Context.Key<>();
+/** A switch to determine whether we check for package/class conflicts
+*/
+final static boolean checkClash = true;
+private final Names names;
+private final Enter enter;
+private final MemberEnter memberEnter;
+private final Log log;
+private final Check chk;
+private final Attr attr;
+private final Symtab syms;
+private final TreeMaker make;
+private final Todo todo;
+private final Annotate annotate;
+private final TypeAnnotations typeAnnotations;
+private final Types types;
+private final JCDiagnostic.Factory diags;
+private final Source source;
+private final DeferredLintHandler deferredLintHandler;
+private final Lint lint;
+private final TypeEnvs typeEnvs;
+private final Dependencies dependencies;
+public static TypeEnter instance(Context context) {
+TypeEnter instance = context.get(typeEnterKey);
+if (instance == null)
+instance = new TypeEnter(context);
+return instance;
+}
+protected TypeEnter(Context context) {
+context.put(typeEnterKey, this);
+names = Names.instance(context);
+enter = Enter.instance(context);
+memberEnter = MemberEnter.instance(context);
+log = Log.instance(context);
+chk = Check.instance(context);
+attr = Attr.instance(context);
+syms = Symtab.instance(context);
+make = TreeMaker.instance(context);
+todo = Todo.instance(context);
+annotate = Annotate.instance(context);
+typeAnnotations = TypeAnnotations.instance(context);
+types = Types.instance(context);
+diags = JCDiagnostic.Factory.instance(context);
+source = Source.instance(context);
+deferredLintHandler = DeferredLintHandler.instance(context);
+lint = Lint.instance(context);
+typeEnvs = TypeEnvs.instance(context);
+dependencies = Dependencies.instance(context);
+allowTypeAnnos = source.allowTypeAnnotations();
+allowDeprecationOnImport = source.allowDeprecationOnImport();
+}
+/** Switch: support type annotations.
+*/
+boolean allowTypeAnnos;
+/**
+* Switch: should deprecation warnings be issued on import
+*/
+boolean allowDeprecationOnImport;
+/** A flag to disable completion from time to time during member
+*  enter, as we only need to look up types.  This avoids
+*  unnecessarily deep recursion.
+*/
+boolean completionEnabled = true;
+/* Verify Imports:
+*/
+protected void ensureImportsChecked(List<JCCompilationUnit> trees) {
+// if there remain any unimported toplevels (these must have
+// no classes at all), process their import statements as well.
+for (JCCompilationUnit tree : trees) {
+if (tree.starImportScope.isEmpty()) {
+Env<AttrContext> topEnv = enter.topLevelEnv(tree);
+finishImports(tree, () -> { completeClass.resolveImports(tree, topEnv); });
+}
+}
+}
+/* ********************************************************************
+* Source completer
+*********************************************************************/
+/** Complete entering a class.
+*  @param sym         The symbol of the class to be completed.
+*/
+public void complete(Symbol sym) throws CompletionFailure {
+// Suppress some (recursive) MemberEnter invocations
+if (!completionEnabled) {
+// Re-install same completer for next time around and return.
+Assert.check((sym.flags() & Flags.COMPOUND) == 0);
+sym.completer = this;
+return;
+}
+try {
+annotate.enterStart();
+sym.flags_field |= UNATTRIBUTED;
+List<Env<AttrContext>> queue;
+dependencies.push((ClassSymbol) sym, CompletionCause.MEMBER_ENTER);
+try {
+queue = completeClass.runPhase(List.of(typeEnvs.get((ClassSymbol) sym)));
+} finally {
+dependencies.pop();
+}
+if (!queue.isEmpty()) {
+Set<JCCompilationUnit> seen = new HashSet<>();
+for (Env<AttrContext> env : queue) {
+if (env.toplevel.defs.contains(env.enclClass) && seen.add(env.toplevel)) {
+finishImports(env.toplevel, () -> {});
+}
+}
+}
+} finally {
+annotate.enterDone();
+}
+}
+void finishImports(JCCompilationUnit toplevel, Runnable resolve) {
+JavaFileObject prev = log.useSource(toplevel.sourcefile);
+try {
+resolve.run();
+chk.checkImportsUnique(toplevel);
+chk.checkImportsResolvable(toplevel);
+toplevel.namedImportScope.finalizeScope();
+toplevel.starImportScope.finalizeScope();
+} finally {
+log.useSource(prev);
+}
+}
+abstract class Phase {
+private final ListBuffer<Env<AttrContext>> queue = new ListBuffer<>();
+private final Phase next;
+private final CompletionCause phaseName;
+Phase(CompletionCause phaseName, Phase next) {
+this.phaseName = phaseName;
+this.next = next;
+}
+public List<Env<AttrContext>> runPhase(List<Env<AttrContext>> envs) {
+boolean firstToComplete = queue.isEmpty();
+for (Env<AttrContext> env : envs) {
+JCClassDecl tree = (JCClassDecl)env.tree;
+queue.add(env);
+JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
+DiagnosticPosition prevLintPos = deferredLintHandler.setPos(tree.pos());
+try {
+dependencies.push(env.enclClass.sym, phaseName);
+doRunPhase(env);
+} catch (CompletionFailure ex) {
+chk.completionError(tree.pos(), ex);
+} finally {
+dependencies.pop();
+deferredLintHandler.setPos(prevLintPos);
+log.useSource(prev);
+}
+}
+if (firstToComplete) {
+List<Env<AttrContext>> out = queue.toList();
+queue.clear();
+return next != null ? next.runPhase(out) : out;
+} else {
+return List.nil();
+}
+}
+protected abstract void doRunPhase(Env<AttrContext> env);
+}
+private final ImportsPhase completeClass = new ImportsPhase();
+/**Analyze import clauses.
+*/
+private final class ImportsPhase extends Phase {
+public ImportsPhase() {
+super(CompletionCause.IMPORTS_PHASE, new HierarchyPhase());
+}
+Env<AttrContext> env;
+ImportFilter staticImportFilter;
+ImportFilter typeImportFilter = new ImportFilter() {
+@Override
+public boolean accepts(Scope origin, Symbol t) {
+return t.kind == TYP;
+}
+};
+@Override
+protected void doRunPhase(Env<AttrContext> env) {
+JCClassDecl tree = env.enclClass;
+ClassSymbol sym = tree.sym;
+// If sym is a toplevel-class, make sure any import
+// clauses in its source file have been seen.
+if (sym.owner.kind == PCK) {
+resolveImports(env.toplevel, env.enclosing(TOPLEVEL));
+todo.append(env);
+}
+if (sym.owner.kind == TYP)
+sym.owner.complete();
+}
+private void resolveImports(JCCompilationUnit tree, Env<AttrContext> env) {
+if (!tree.starImportScope.isEmpty()) {
+// we must have already processed this toplevel
+return;
+}
+ImportFilter prevStaticImportFilter = staticImportFilter;
+DiagnosticPosition prevLintPos = deferredLintHandler.immediate();
+Lint prevLint = chk.setLint(lint);
+Env<AttrContext> prevEnv = this.env;
+try {
+this.env = env;
+final PackageSymbol packge = env.toplevel.packge;
+this.staticImportFilter = new ImportFilter() {
+@Override
+public boolean accepts(Scope origin, Symbol sym) {
+return sym.isStatic() &&
+chk.staticImportAccessible(sym, packge) &&
+sym.isMemberOf((TypeSymbol) origin.owner, types);
+}
+};
+// Import-on-demand java.lang.
+importAll(tree.pos, syms.enterPackage(names.java_lang), env);
+// Process the package def and all import clauses.
+if (tree.getPackage() != null)
+checkClassPackageClash(tree.getPackage());
+for (JCImport imp : tree.getImports()) {
+doImport(imp);
+}
+} finally {
+this.env = prevEnv;
+chk.setLint(prevLint);
+deferredLintHandler.setPos(prevLintPos);
+this.staticImportFilter = prevStaticImportFilter;
+}
+}
+private void checkClassPackageClash(JCPackageDecl tree) {
+// check that no class exists with same fully qualified name as
+// toplevel package
+if (checkClash && tree.pid != null) {
+Symbol p = env.toplevel.packge;
+while (p.owner != syms.rootPackage) {
+p.owner.complete(); // enter all class members of p
+if (syms.classes.get(p.getQualifiedName()) != null) {
+log.error(tree.pos,
+"pkg.clashes.with.class.of.same.name",
+p);
+}
+p = p.owner;
+}
+}
+// process package annotations
+annotate.annotateLater(tree.annotations, env, env.toplevel.packge, null);
+}
+private void doImport(JCImport tree) {
+dependencies.push(AttributionKind.IMPORT, tree);
+JCFieldAccess imp = (JCFieldAccess)tree.qualid;
+Name name = TreeInfo.name(imp);
+// Create a local environment pointing to this tree to disable
+// effects of other imports in Resolve.findGlobalType
+Env<AttrContext> localEnv = env.dup(tree);
+TypeSymbol p = attr.attribImportQualifier(tree, localEnv).tsym;
+if (name == names.asterisk) {
+// Import on demand.
+chk.checkCanonical(imp.selected);
+if (tree.staticImport)
+importStaticAll(tree.pos, p, env);
+else
+importAll(tree.pos, p, env);
+} else {
+// Named type import.
+if (tree.staticImport) {
+importNamedStatic(tree.pos(), p, name, localEnv, tree);
+chk.checkCanonical(imp.selected);
+} else {
+TypeSymbol c = attribImportType(imp, localEnv).tsym;
+chk.checkCanonical(imp);
+importNamed(tree.pos(), c, env, tree);
+}
+}
+dependencies.pop();
+}
+Type attribImportType(JCTree tree, Env<AttrContext> env) {
+Assert.check(completionEnabled);
+Lint prevLint = chk.setLint(allowDeprecationOnImport ?
+lint : lint.suppress(LintCategory.DEPRECATION));
+try {
+// To prevent deep recursion, suppress completion of some
+// types.
+completionEnabled = false;
+return attr.attribType(tree, env);
+} finally {
+completionEnabled = true;
+chk.setLint(prevLint);
+}
+}
+/** Import all classes of a class or package on demand.
+*  @param pos           Position to be used for error reporting.
+*  @param tsym          The class or package the members of which are imported.
+*  @param env           The env in which the imported classes will be entered.
+*/
+private void importAll(int pos,
+final TypeSymbol tsym,
+Env<AttrContext> env) {
+// Check that packages imported from exist (JLS ???).
+if (tsym.kind == PCK && tsym.members().isEmpty() && !tsym.exists()) {
+// If we can't find java.lang, exit immediately.
+if (((PackageSymbol)tsym).fullname.equals(names.java_lang)) {
+JCDiagnostic msg = diags.fragment("fatal.err.no.java.lang");
+throw new FatalError(msg);
+} else {
+log.error(DiagnosticFlag.RESOLVE_ERROR, pos, "doesnt.exist", tsym);
+}
+}
+env.toplevel.starImportScope.importAll(types, tsym.members(), typeImportFilter, false);
+}
+/** Import all static members of a class or package on demand.
+*  @param pos           Position to be used for error reporting.
+*  @param tsym          The class or package the members of which are imported.
+*  @param env           The env in which the imported classes will be entered.
+*/
+private void importStaticAll(int pos,
+final TypeSymbol tsym,
+Env<AttrContext> env) {
+final StarImportScope toScope = env.toplevel.starImportScope;
+final TypeSymbol origin = tsym;
+toScope.importAll(types, origin.members(), staticImportFilter, true);
+}
+/** Import statics types of a given name.  Non-types are handled in Attr.
+*  @param pos           Position to be used for error reporting.
+*  @param tsym          The class from which the name is imported.
+*  @param name          The (simple) name being imported.
+*  @param env           The environment containing the named import
+*                  scope to add to.
+*/
+private void importNamedStatic(final DiagnosticPosition pos,
+final TypeSymbol tsym,
+final Name name,
+final Env<AttrContext> env,
+final JCImport imp) {
+if (tsym.kind != TYP) {
+log.error(DiagnosticFlag.RECOVERABLE, pos, "static.imp.only.classes.and.interfaces");
+return;
+}
+final NamedImportScope toScope = env.toplevel.namedImportScope;
+final Scope originMembers = tsym.members();
+imp.importScope = toScope.importByName(types, originMembers, name, staticImportFilter);
+}
+/** Import given class.
+*  @param pos           Position to be used for error reporting.
+*  @param tsym          The class to be imported.
+*  @param env           The environment containing the named import
+*                  scope to add to.
+*/
+private void importNamed(DiagnosticPosition pos, final Symbol tsym, Env<AttrContext> env, JCImport imp) {
+if (tsym.kind == TYP)
+imp.importScope = env.toplevel.namedImportScope.importType(tsym.owner.members(), tsym.owner.members(), tsym);
+}
+}
+/**Defines common utility methods used by the HierarchyPhase and HeaderPhase.
+*/
+private abstract class AbstractHeaderPhase extends Phase {
+public AbstractHeaderPhase(CompletionCause phaseName, Phase next) {
+super(phaseName, next);
+}
+protected Env<AttrContext> baseEnv(JCClassDecl tree, Env<AttrContext> env) {
+WriteableScope baseScope = WriteableScope.create(tree.sym);
+//import already entered local classes into base scope
+for (Symbol sym : env.outer.info.scope.getSymbols(NON_RECURSIVE)) {
+if (sym.isLocal()) {
+baseScope.enter(sym);
+}
+}
+//import current type-parameters into base scope
+if (tree.typarams != null)
+for (List<JCTypeParameter> typarams = tree.typarams;
+typarams.nonEmpty();
+typarams = typarams.tail)
+baseScope.enter(typarams.head.type.tsym);
+Env<AttrContext> outer = env.outer; // the base clause can't see members of this class
+Env<AttrContext> localEnv = outer.dup(tree, outer.info.dup(baseScope));
+localEnv.baseClause = true;
+localEnv.outer = outer;
+localEnv.info.isSelfCall = false;
+return localEnv;
+}
+/** Generate a base clause for an enum type.
+*  @param pos              The position for trees and diagnostics, if any
+*  @param c                The class symbol of the enum
+*/
+protected  JCExpression enumBase(int pos, ClassSymbol c) {
+JCExpression result = make.at(pos).
+TypeApply(make.QualIdent(syms.enumSym),
+List.<JCExpression>of(make.Type(c.type)));
+return result;
+}
+protected Type modelMissingTypes(Type t, final JCExpression tree, final boolean interfaceExpected) {
+if (!t.hasTag(ERROR))
+return t;
+return new ErrorType(t.getOriginalType(), t.tsym) {
+private Type modelType;
+@Override
+public Type getModelType() {
+if (modelType == null)
+modelType = new Synthesizer(getOriginalType(), interfaceExpected).visit(tree);
+return modelType;
+}
+};
+}
+// where:
+private class Synthesizer extends JCTree.Visitor {
+Type originalType;
+boolean interfaceExpected;
+List<ClassSymbol> synthesizedSymbols = List.nil();
+Type result;
+Synthesizer(Type originalType, boolean interfaceExpected) {
+this.originalType = originalType;
+this.interfaceExpected = interfaceExpected;
+}
+Type visit(JCTree tree) {
+tree.accept(this);
+return result;
+}
+List<Type> visit(List<? extends JCTree> trees) {
+ListBuffer<Type> lb = new ListBuffer<>();
+for (JCTree t: trees)
+lb.append(visit(t));
+return lb.toList();
+}
+@Override
+public void visitTree(JCTree tree) {
+result = syms.errType;
+}
+@Override
+public void visitIdent(JCIdent tree) {
+if (!tree.type.hasTag(ERROR)) {
+result = tree.type;
+} else {
+result = synthesizeClass(tree.name, syms.unnamedPackage).type;
+}
+}
+@Override
+public void visitSelect(JCFieldAccess tree) {
+if (!tree.type.hasTag(ERROR)) {
+result = tree.type;
+} else {
+Type selectedType;
+boolean prev = interfaceExpected;
+try {
+interfaceExpected = false;
+selectedType = visit(tree.selected);
+} finally {
+interfaceExpected = prev;
+}
+ClassSymbol c = synthesizeClass(tree.name, selectedType.tsym);
+result = c.type;
+}
+}
+@Override
+public void visitTypeApply(JCTypeApply tree) {
+if (!tree.type.hasTag(ERROR)) {
+result = tree.type;
+} else {
+ClassType clazzType = (ClassType) visit(tree.clazz);
+if (synthesizedSymbols.contains(clazzType.tsym))
+synthesizeTyparams((ClassSymbol) clazzType.tsym, tree.arguments.size());
+final List<Type> actuals = visit(tree.arguments);
+result = new ErrorType(tree.type, clazzType.tsym) {
+@Override @DefinedBy(Api.LANGUAGE_MODEL)
+public List<Type> getTypeArguments() {
+return actuals;
+}
+};
+}
+}
+ClassSymbol synthesizeClass(Name name, Symbol owner) {
+int flags = interfaceExpected ? INTERFACE : 0;
+ClassSymbol c = new ClassSymbol(flags, name, owner);
+c.members_field = new Scope.ErrorScope(c);
+c.type = new ErrorType(originalType, c) {
+@Override @DefinedBy(Api.LANGUAGE_MODEL)
+public List<Type> getTypeArguments() {
+return typarams_field;
+}
+};
+synthesizedSymbols = synthesizedSymbols.prepend(c);
+return c;
+}
+void synthesizeTyparams(ClassSymbol sym, int n) {
+ClassType ct = (ClassType) sym.type;
+Assert.check(ct.typarams_field.isEmpty());
+if (n == 1) {
+TypeVar v = new TypeVar(names.fromString("T"), sym, syms.botType);
+ct.typarams_field = ct.typarams_field.prepend(v);
+} else {
+for (int i = n; i > 0; i--) {
+TypeVar v = new TypeVar(names.fromString("T" + i), sym,
+syms.botType);
+ct.typarams_field = ct.typarams_field.prepend(v);
+}
+}
+}
+}
+protected void attribSuperTypes(Env<AttrContext> env, Env<AttrContext> baseEnv) {
+JCClassDecl tree = env.enclClass;
+ClassSymbol sym = tree.sym;
+ClassType ct = (ClassType)sym.type;
+// Determine supertype.
+Type supertype;
+JCExpression extending;
+if (tree.extending != null) {
+extending = clearTypeParams(tree.extending);
+dependencies.push(AttributionKind.EXTENDS, tree.extending);
+try {
+supertype = attr.attribBase(extending, baseEnv,
+true, false, true);
+} finally {
+dependencies.pop();
+}
+} else {
+extending = null;
+supertype = ((tree.mods.flags & Flags.ENUM) != 0)
+? attr.attribBase(enumBase(tree.pos, sym), baseEnv,
+true, false, false)
+: (sym.fullname == names.java_lang_Object)
+? Type.noType
+: syms.objectType;
+}
+ct.supertype_field = modelMissingTypes(supertype, extending, false);
+// Determine interfaces.
+ListBuffer<Type> interfaces = new ListBuffer<>();
+ListBuffer<Type> all_interfaces = null; // lazy init
+List<JCExpression> interfaceTrees = tree.implementing;
+for (JCExpression iface : interfaceTrees) {
+iface = clearTypeParams(iface);
+dependencies.push(AttributionKind.IMPLEMENTS, iface);
+try {
+Type it = attr.attribBase(iface, baseEnv, false, true, true);
+if (it.hasTag(CLASS)) {
+interfaces.append(it);
+if (all_interfaces != null) all_interfaces.append(it);
+} else {
+if (all_interfaces == null)
+all_interfaces = new ListBuffer<Type>().appendList(interfaces);
+all_interfaces.append(modelMissingTypes(it, iface, true));
+}
+} finally {
+dependencies.pop();
+}
+}
+if ((sym.flags_field & ANNOTATION) != 0) {
+ct.interfaces_field = List.of(syms.annotationType);
+ct.all_interfaces_field = ct.interfaces_field;
+}  else {
+ct.interfaces_field = interfaces.toList();
+ct.all_interfaces_field = (all_interfaces == null)
+? ct.interfaces_field : all_interfaces.toList();
+}
+}
+//where:
+protected JCExpression clearTypeParams(JCExpression superType) {
+return superType;
+}
+}
+private final class HierarchyPhase extends AbstractHeaderPhase {
+public HierarchyPhase() {
+super(CompletionCause.HIERARCHY_PHASE, new HeaderPhase());
+}
+@Override
+protected void doRunPhase(Env<AttrContext> env) {
+JCClassDecl tree = env.enclClass;
+ClassSymbol sym = tree.sym;
+ClassType ct = (ClassType)sym.type;
+Env<AttrContext> baseEnv = baseEnv(tree, env);
+attribSuperTypes(env, baseEnv);
+if (sym.fullname == names.java_lang_Object) {
+if (tree.extending != null) {
+chk.checkNonCyclic(tree.extending.pos(),
+ct.supertype_field);
+ct.supertype_field = Type.noType;
+}
+else if (tree.implementing.nonEmpty()) {
+chk.checkNonCyclic(tree.implementing.head.pos(),
+ct.interfaces_field.head);
+ct.interfaces_field = List.nil();
+}
+}
+// Annotations.
+// In general, we cannot fully process annotations yet,  but we
+// can attribute the annotation types and then check to see if the
+// @Deprecated annotation is present.
+attr.attribAnnotationTypes(tree.mods.annotations, baseEnv);
+if (hasDeprecatedAnnotation(tree.mods.annotations))
+sym.flags_field |= DEPRECATED;
+chk.checkNonCyclicDecl(tree);
+}
+//where:
+protected JCExpression clearTypeParams(JCExpression superType) {
+switch (superType.getTag()) {
+case TYPEAPPLY:
+return ((JCTypeApply) superType).clazz;
+}
+return superType;
+}
+/**
+* Check if a list of annotations contains a reference to
+* java.lang.Deprecated.
+**/
+private boolean hasDeprecatedAnnotation(List<JCAnnotation> annotations) {
+for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
+JCAnnotation a = al.head;
+if (a.annotationType.type == syms.deprecatedType && a.args.isEmpty())
+return true;
+}
+return false;
+}
+}
+private final class HeaderPhase extends AbstractHeaderPhase {
+public HeaderPhase() {
+super(CompletionCause.HEADER_PHASE, new MembersPhase());
+}
+@Override
+protected void doRunPhase(Env<AttrContext> env) {
+JCClassDecl tree = env.enclClass;
+ClassSymbol sym = tree.sym;
+ClassType ct = (ClassType)sym.type;
+// create an environment for evaluating the base clauses
+Env<AttrContext> baseEnv = baseEnv(tree, env);
+if (tree.extending != null)
+annotate.annotateTypeLater(tree.extending, baseEnv, sym, tree.pos());
+for (JCExpression impl : tree.implementing)
+annotate.annotateTypeLater(impl, baseEnv, sym, tree.pos());
+annotate.flush();
+attribSuperTypes(env, baseEnv);
+Set<Type> interfaceSet = new HashSet<>();
+for (JCExpression iface : tree.implementing) {
+Type it = iface.type;
+if (it.hasTag(CLASS))
+chk.checkNotRepeated(iface.pos(), types.erasure(it), interfaceSet);
+}
+annotate.annotateLater(tree.mods.annotations, baseEnv,
+sym, tree.pos());
+attr.attribTypeVariables(tree.typarams, baseEnv);
+for (JCTypeParameter tp : tree.typarams)
+annotate.annotateTypeLater(tp, baseEnv, sym, tree.pos());
+// check that no package exists with same fully qualified name,
+// but admit classes in the unnamed package which have the same
+// name as a top-level package.
+if (checkClash &&
+sym.owner.kind == PCK && sym.owner != syms.unnamedPackage &&
+syms.packageExists(sym.fullname)) {
+log.error(tree.pos, "clash.with.pkg.of.same.name", Kinds.kindName(sym), sym);
+}
+if (sym.owner.kind == PCK && (sym.flags_field & PUBLIC) == 0 &&
+!env.toplevel.sourcefile.isNameCompatible(sym.name.toString(),JavaFileObject.Kind.SOURCE)) {
+sym.flags_field |= AUXILIARY;
+}
+}
+}
+/** Enter member fields and methods of a class
+*/
+private final class MembersPhase extends Phase {
+public MembersPhase() {
+super(CompletionCause.MEMBERS_PHASE, null);
+}
+@Override
+protected void doRunPhase(Env<AttrContext> env) {
+JCClassDecl tree = env.enclClass;
+ClassSymbol sym = tree.sym;
+ClassType ct = (ClassType)sym.type;
+// Add default constructor if needed.
+if ((sym.flags() & INTERFACE) == 0 &&
+!TreeInfo.hasConstructors(tree.defs)) {
+List<Type> argtypes = List.nil();
+List<Type> typarams = List.nil();
+List<Type> thrown = List.nil();
+long ctorFlags = 0;
+boolean based = false;
+boolean addConstructor = true;
+JCNewClass nc = null;
+if (sym.name.isEmpty()) {
+nc = (JCNewClass)env.next.tree;
+if (nc.constructor != null) {
+addConstructor = nc.constructor.kind != ERR;
+Type superConstrType = types.memberType(sym.type,
+nc.constructor);
+argtypes = superConstrType.getParameterTypes();
+typarams = superConstrType.getTypeArguments();
+ctorFlags = nc.constructor.flags() & VARARGS;
+if (nc.encl != null) {
+argtypes = argtypes.prepend(nc.encl.type);
+based = true;
+}
+thrown = superConstrType.getThrownTypes();
+}
+}
+if (addConstructor) {
+MethodSymbol basedConstructor = nc != null ?
+(MethodSymbol)nc.constructor : null;
+JCTree constrDef = DefaultConstructor(make.at(tree.pos), sym,
+basedConstructor,
+typarams, argtypes, thrown,
+ctorFlags, based);
+tree.defs = tree.defs.prepend(constrDef);
+}
+}
+// enter symbols for 'this' into current scope.
+VarSymbol thisSym =
+new VarSymbol(FINAL | HASINIT, names._this, sym.type, sym);
+thisSym.pos = Position.FIRSTPOS;
+env.info.scope.enter(thisSym);
+// if this is a class, enter symbol for 'super' into current scope.
+if ((sym.flags_field & INTERFACE) == 0 &&
+ct.supertype_field.hasTag(CLASS)) {
+VarSymbol superSym =
+new VarSymbol(FINAL | HASINIT, names._super,
+ct.supertype_field, sym);
+superSym.pos = Position.FIRSTPOS;
+env.info.scope.enter(superSym);
+}
+finishClass(tree, env);
+if (allowTypeAnnos) {
+typeAnnotations.organizeTypeAnnotationsSignatures(env, (JCClassDecl)env.tree);
+typeAnnotations.validateTypeAnnotationsSignatures(env, (JCClassDecl)env.tree);
+}
+}
+/** Enter members for a class.
+*/
+void finishClass(JCClassDecl tree, Env<AttrContext> env) {
+if ((tree.mods.flags & Flags.ENUM) != 0 &&
+(types.supertype(tree.sym.type).tsym.flags() & Flags.ENUM) == 0) {
+addEnumMembers(tree, env);
+}
+memberEnter.memberEnter(tree.defs, env);
+}
+/** Add the implicit members for an enum type
+*  to the symbol table.
+*/
+private void addEnumMembers(JCClassDecl tree, Env<AttrContext> env) {
+JCExpression valuesType = make.Type(new ArrayType(tree.sym.type, syms.arrayClass));
+// public static T[] values() { return ???; }
+JCMethodDecl values = make.
+MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
+names.values,
+valuesType,
+List.<JCTypeParameter>nil(),
+List.<JCVariableDecl>nil(),
+List.<JCExpression>nil(), // thrown
+null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
+null);
+memberEnter.memberEnter(values, env);
+// public static T valueOf(String name) { return ???; }
+JCMethodDecl valueOf = make.
+MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
+names.valueOf,
+make.Type(tree.sym.type),
+List.<JCTypeParameter>nil(),
+List.of(make.VarDef(make.Modifiers(Flags.PARAMETER |
+Flags.MANDATED),
+names.fromString("name"),
+make.Type(syms.stringType), null)),
+List.<JCExpression>nil(), // thrown
+null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
+null);
+memberEnter.memberEnter(valueOf, env);
+}
+}
+/* ***************************************************************************
+* tree building
+****************************************************************************/
+/** Generate default constructor for given class. For classes different
+*  from java.lang.Object, this is:
+*
+*    c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
+*      super(x_0, ..., x_n)
+*    }
+*
+*  or, if based == true:
+*
+*    c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
+*      x_0.super(x_1, ..., x_n)
+*    }
+*
+*  @param make     The tree factory.
+*  @param c        The class owning the default constructor.
+*  @param argtypes The parameter types of the constructor.
+*  @param thrown   The thrown exceptions of the constructor.
+*  @param based    Is first parameter a this$n?
+*/
+JCTree DefaultConstructor(TreeMaker make,
+ClassSymbol c,
+MethodSymbol baseInit,
+List<Type> typarams,
+List<Type> argtypes,
+List<Type> thrown,
+long flags,
+boolean based) {
+JCTree result;
+if ((c.flags() & ENUM) != 0 &&
+(types.supertype(c.type).tsym == syms.enumSym)) {
+// constructors of true enums are private
+flags = (flags & ~AccessFlags) | PRIVATE | GENERATEDCONSTR;
+} else
+flags |= (c.flags() & AccessFlags) | GENERATEDCONSTR;
+if (c.name.isEmpty()) {
+flags |= ANONCONSTR;
+}
+Type mType = new MethodType(argtypes, null, thrown, c);
+Type initType = typarams.nonEmpty() ?
+new ForAll(typarams, mType) :
+mType;
+MethodSymbol init = new MethodSymbol(flags, names.init,
+initType, c);
+init.params = createDefaultConstructorParams(make, baseInit, init,
+argtypes, based);
+List<JCVariableDecl> params = make.Params(argtypes, init);
+List<JCStatement> stats = List.nil();
+if (c.type != syms.objectType) {
+stats = stats.prepend(SuperCall(make, typarams, params, based));
+}
+result = make.MethodDef(init, make.Block(0, stats));
+return result;
+}
+private List<VarSymbol> createDefaultConstructorParams(
+TreeMaker make,
+MethodSymbol baseInit,
+MethodSymbol init,
+List<Type> argtypes,
+boolean based) {
+List<VarSymbol> initParams = null;
+List<Type> argTypesList = argtypes;
+if (based) {
+/*  In this case argtypes will have an extra type, compared to baseInit,
+*  corresponding to the type of the enclosing instance i.e.:
+*
+*  Inner i = outer.new Inner(1){}
+*
+*  in the above example argtypes will be (Outer, int) and baseInit
+*  will have parameter's types (int). So in this case we have to add
+*  first the extra type in argtypes and then get the names of the
+*  parameters from baseInit.
+*/
+initParams = List.nil();
+VarSymbol param = new VarSymbol(PARAMETER, make.paramName(0), argtypes.head, init);
+initParams = initParams.append(param);
+argTypesList = argTypesList.tail;
+}
+if (baseInit != null && baseInit.params != null &&
+baseInit.params.nonEmpty() && argTypesList.nonEmpty()) {
+initParams = (initParams == null) ? List.<VarSymbol>nil() : initParams;
+List<VarSymbol> baseInitParams = baseInit.params;
+while (baseInitParams.nonEmpty() && argTypesList.nonEmpty()) {
+VarSymbol param = new VarSymbol(baseInitParams.head.flags() | PARAMETER,
+baseInitParams.head.name, argTypesList.head, init);
+initParams = initParams.append(param);
+baseInitParams = baseInitParams.tail;
+argTypesList = argTypesList.tail;
+}
+}
+return initParams;
+}
+/** Generate call to superclass constructor. This is:
+*
+*    super(id_0, ..., id_n)
+*
+* or, if based == true
+*
+*    id_0.super(id_1,...,id_n)
+*
+*  where id_0, ..., id_n are the names of the given parameters.
+*
+*  @param make    The tree factory
+*  @param params  The parameters that need to be passed to super
+*  @param typarams  The type parameters that need to be passed to super
+*  @param based   Is first parameter a this$n?
+*/
+JCExpressionStatement SuperCall(TreeMaker make,
+List<Type> typarams,
+List<JCVariableDecl> params,
+boolean based) {
+JCExpression meth;
+if (based) {
+meth = make.Select(make.Ident(params.head), names._super);
+params = params.tail;
+} else {
+meth = make.Ident(names._super);
+}
+List<JCExpression> typeargs = typarams.nonEmpty() ? make.Types(typarams) : null;
+return make.Exec(make.Apply(typeargs, meth, make.Idents(params)));
+}
+}

changeset 27857	7e913a535736
parent 27854	22b4bfc4e22f
child 29149	3fa94aad0264