| /* |
| * Copyright (c) 2003, 2015, 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 java.util.function.BiConsumer; |
| |
| 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.comp.Annotate.AnnotationTypeMetadata; |
| 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.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); |
| Source source = Source.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.isFilled()) { |
| 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.blockAnnotations(); |
| sym.flags_field |= UNATTRIBUTED; |
| |
| List<Env<AttrContext>> queue; |
| |
| dependencies.push((ClassSymbol) sym, CompletionCause.MEMBER_ENTER); |
| try { |
| queue = completeClass.completeEnvs(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.unblockAnnotations(); |
| } |
| } |
| |
| void finishImports(JCCompilationUnit toplevel, Runnable resolve) { |
| JavaFileObject prev = log.useSource(toplevel.sourcefile); |
| try { |
| resolve.run(); |
| chk.checkImportsUnique(toplevel); |
| chk.checkImportsResolvable(toplevel); |
| chk.checkImportedPackagesObservable(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 final List<Env<AttrContext>> completeEnvs(List<Env<AttrContext>> envs) { |
| boolean firstToComplete = queue.isEmpty(); |
| |
| doCompleteEnvs(envs); |
| |
| if (firstToComplete) { |
| List<Env<AttrContext>> out = queue.toList(); |
| |
| queue.clear(); |
| return next != null ? next.completeEnvs(out) : out; |
| } else { |
| return List.nil(); |
| } |
| } |
| |
| protected void doCompleteEnvs(List<Env<AttrContext>> envs) { |
| 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); |
| runPhase(env); |
| } catch (CompletionFailure ex) { |
| chk.completionError(tree.pos(), ex); |
| } finally { |
| dependencies.pop(); |
| deferredLintHandler.setPos(prevLintPos); |
| log.useSource(prev); |
| } |
| } |
| } |
| |
| protected abstract void runPhase(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; |
| BiConsumer<JCImport, CompletionFailure> cfHandler = |
| (imp, cf) -> chk.completionError(imp.pos(), cf); |
| |
| @Override |
| protected void runPhase(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.isFilled()) { |
| // we must have already processed this toplevel |
| return; |
| } |
| |
| ImportFilter prevStaticImportFilter = staticImportFilter; |
| ImportFilter prevTypeImportFilter = typeImportFilter; |
| 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 = |
| (origin, sym) -> sym.isStatic() && |
| chk.importAccessible(sym, packge) && |
| sym.isMemberOf((TypeSymbol) origin.owner, types); |
| this.typeImportFilter = |
| (origin, sym) -> sym.kind == TYP && |
| chk.importAccessible(sym, packge); |
| |
| // Import-on-demand java.lang. |
| PackageSymbol javaLang = syms.enterPackage(names.java_lang); |
| if (javaLang.members().isEmpty() && !javaLang.exists()) |
| throw new FatalError(diags.fragment("fatal.err.no.java.lang")); |
| importAll(make.at(tree.pos()).Import(make.QualIdent(javaLang), false), javaLang, 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; |
| this.typeImportFilter = prevTypeImportFilter; |
| } |
| } |
| |
| 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) { |
| 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, p, env); |
| else |
| importAll(tree, p, env); |
| } else { |
| // Named type import. |
| if (tree.staticImport) { |
| importNamedStatic(tree, p, name, localEnv); |
| chk.checkCanonical(imp.selected); |
| } else { |
| TypeSymbol c = attribImportType(imp, localEnv).tsym; |
| chk.checkCanonical(imp); |
| importNamed(tree.pos(), c, env, tree); |
| } |
| } |
| } |
| |
| 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 imp The import that is being handled. |
| * @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(JCImport imp, |
| final TypeSymbol tsym, |
| Env<AttrContext> env) { |
| env.toplevel.starImportScope.importAll(types, tsym.members(), typeImportFilter, imp, cfHandler); |
| } |
| |
| /** Import all static members of a class or package on demand. |
| * @param imp The import that is being handled. |
| * @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(JCImport imp, |
| final TypeSymbol tsym, |
| Env<AttrContext> env) { |
| final StarImportScope toScope = env.toplevel.starImportScope; |
| final TypeSymbol origin = tsym; |
| |
| toScope.importAll(types, origin.members(), staticImportFilter, imp, cfHandler); |
| } |
| |
| /** Import statics types of a given name. Non-types are handled in Attr. |
| * @param imp The import that is being handled. |
| * @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 JCImport imp, |
| final TypeSymbol tsym, |
| final Name name, |
| final Env<AttrContext> env) { |
| if (tsym.kind != TYP) { |
| log.error(DiagnosticFlag.RECOVERABLE, imp.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, imp, cfHandler); |
| } |
| |
| /** 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); |
| supertype = attr.attribBase(extending, baseEnv, true, false, true); |
| } 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); |
| 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)); |
| } |
| } |
| |
| 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 implements Completer { |
| |
| public HierarchyPhase() { |
| super(CompletionCause.HIERARCHY_PHASE, new HeaderPhase()); |
| } |
| |
| @Override |
| protected void doCompleteEnvs(List<Env<AttrContext>> envs) { |
| //The ClassSymbols in the envs list may not be in the dependency order. |
| //To get proper results, for every class or interface C, the supertypes of |
| //C must be processed by the HierarchyPhase phase before C. |
| //To achieve that, the HierarchyPhase is registered as the Completer for |
| //all the classes first, and then all the classes are completed. |
| for (Env<AttrContext> env : envs) { |
| env.enclClass.sym.completer = this; |
| } |
| for (Env<AttrContext> env : envs) { |
| env.enclClass.sym.complete(); |
| } |
| } |
| |
| @Override |
| protected void runPhase(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; |
| } |
| |
| @Override |
| public void complete(Symbol sym) throws CompletionFailure { |
| Env<AttrContext> env = typeEnvs.get((ClassSymbol) sym); |
| |
| super.doCompleteEnvs(List.of(env)); |
| } |
| |
| } |
| |
| private final class HeaderPhase extends AbstractHeaderPhase { |
| |
| public HeaderPhase() { |
| super(CompletionCause.HEADER_PHASE, new MembersPhase()); |
| } |
| |
| @Override |
| protected void runPhase(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.queueScanTreeAndTypeAnnotate(tree.extending, baseEnv, sym, tree.pos()); |
| for (JCExpression impl : tree.implementing) |
| annotate.queueScanTreeAndTypeAnnotate(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.queueScanTreeAndTypeAnnotate(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 runPhase(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); |
| |
| if (tree.sym.isAnnotationType()) { |
| Assert.check(tree.sym.isCompleted()); |
| tree.sym.setAnnotationTypeMetadata(new AnnotationTypeMetadata(tree.sym, annotate.annotationTypeSourceCompleter())); |
| } |
| } |
| |
| /** 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))); |
| } |
| } |
