| /* |
| * Copyright (c) 2003, 2008, 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.*; |
| import java.util.Set; |
| import javax.tools.JavaFileObject; |
| |
| import com.sun.tools.javac.code.*; |
| import com.sun.tools.javac.jvm.*; |
| import com.sun.tools.javac.tree.*; |
| import com.sun.tools.javac.util.*; |
| import com.sun.tools.javac.util.List; |
| |
| import com.sun.tools.javac.code.Type.*; |
| import com.sun.tools.javac.code.Symbol.*; |
| import com.sun.tools.javac.tree.JCTree.*; |
| |
| import static com.sun.tools.javac.code.Flags.*; |
| import static com.sun.tools.javac.code.Kinds.*; |
| import static com.sun.tools.javac.code.TypeTags.*; |
| import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
| |
| /** This is the second phase of Enter, in which classes are completed |
| * by entering their members into the class scope using |
| * MemberEnter.complete(). See Enter for an overview. |
| * |
| * <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 MemberEnter extends JCTree.Visitor implements Completer { |
| protected static final Context.Key<MemberEnter> memberEnterKey = |
| new Context.Key<MemberEnter>(); |
| |
| /** 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 Log log; |
| private final Check chk; |
| private final Attr attr; |
| private final Symtab syms; |
| private final Scope.ScopeCounter scopeCounter; |
| private final TreeMaker make; |
| private final ClassReader reader; |
| private final Todo todo; |
| private final Annotate annotate; |
| private final Types types; |
| private final JCDiagnostic.Factory diags; |
| private final Target target; |
| |
| private final boolean skipAnnotations; |
| |
| public static MemberEnter instance(Context context) { |
| MemberEnter instance = context.get(memberEnterKey); |
| if (instance == null) |
| instance = new MemberEnter(context); |
| return instance; |
| } |
| |
| protected MemberEnter(Context context) { |
| context.put(memberEnterKey, this); |
| names = Names.instance(context); |
| enter = Enter.instance(context); |
| log = Log.instance(context); |
| chk = Check.instance(context); |
| attr = Attr.instance(context); |
| syms = Symtab.instance(context); |
| scopeCounter = Scope.ScopeCounter.instance(context); |
| make = TreeMaker.instance(context); |
| reader = ClassReader.instance(context); |
| todo = Todo.instance(context); |
| annotate = Annotate.instance(context); |
| types = Types.instance(context); |
| diags = JCDiagnostic.Factory.instance(context); |
| target = Target.instance(context); |
| Options options = Options.instance(context); |
| skipAnnotations = options.isSet("skipAnnotations"); |
| } |
| |
| /** A queue for classes whose members still need to be entered into the |
| * symbol table. |
| */ |
| ListBuffer<Env<AttrContext>> halfcompleted = new ListBuffer<Env<AttrContext>>(); |
| |
| /** Set to true only when the first of a set of classes is |
| * processed from the halfcompleted queue. |
| */ |
| boolean isFirst = true; |
| |
| /** 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; |
| |
| /* ---------- Processing import clauses ---------------- |
| */ |
| |
| /** 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 toScope The (import) scope in which imported classes |
| * are 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().elems == null && !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(pos, "doesnt.exist", tsym); |
| } |
| } |
| final Scope fromScope = tsym.members(); |
| final Scope toScope = env.toplevel.starImportScope; |
| for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) { |
| if (e.sym.kind == TYP && !toScope.includes(e.sym)) |
| toScope.enter(e.sym, fromScope); |
| } |
| } |
| |
| /** 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 toScope The (import) scope in which imported classes |
| * are entered. |
| */ |
| private void importStaticAll(int pos, |
| final TypeSymbol tsym, |
| Env<AttrContext> env) { |
| final JavaFileObject sourcefile = env.toplevel.sourcefile; |
| final Scope toScope = env.toplevel.starImportScope; |
| final PackageSymbol packge = env.toplevel.packge; |
| final TypeSymbol origin = tsym; |
| |
| // enter imported types immediately |
| new Object() { |
| Set<Symbol> processed = new HashSet<Symbol>(); |
| void importFrom(TypeSymbol tsym) { |
| if (tsym == null || !processed.add(tsym)) |
| return; |
| |
| // also import inherited names |
| importFrom(types.supertype(tsym.type).tsym); |
| for (Type t : types.interfaces(tsym.type)) |
| importFrom(t.tsym); |
| |
| final Scope fromScope = tsym.members(); |
| for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) { |
| Symbol sym = e.sym; |
| if (sym.kind == TYP && |
| (sym.flags() & STATIC) != 0 && |
| staticImportAccessible(sym, packge) && |
| sym.isMemberOf(origin, types) && |
| !toScope.includes(sym)) |
| toScope.enter(sym, fromScope, origin.members()); |
| } |
| } |
| }.importFrom(tsym); |
| |
| // enter non-types before annotations that might use them |
| annotate.earlier(new Annotate.Annotator() { |
| Set<Symbol> processed = new HashSet<Symbol>(); |
| |
| public String toString() { |
| return "import static " + tsym + ".*" + " in " + sourcefile; |
| } |
| void importFrom(TypeSymbol tsym) { |
| if (tsym == null || !processed.add(tsym)) |
| return; |
| |
| // also import inherited names |
| importFrom(types.supertype(tsym.type).tsym); |
| for (Type t : types.interfaces(tsym.type)) |
| importFrom(t.tsym); |
| |
| final Scope fromScope = tsym.members(); |
| for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) { |
| Symbol sym = e.sym; |
| if (sym.isStatic() && sym.kind != TYP && |
| staticImportAccessible(sym, packge) && |
| !toScope.includes(sym) && |
| sym.isMemberOf(origin, types)) { |
| toScope.enter(sym, fromScope, origin.members()); |
| } |
| } |
| } |
| public void enterAnnotation() { |
| importFrom(tsym); |
| } |
| }); |
| } |
| |
| // is the sym accessible everywhere in packge? |
| boolean staticImportAccessible(Symbol sym, PackageSymbol packge) { |
| int flags = (int)(sym.flags() & AccessFlags); |
| switch (flags) { |
| default: |
| case PUBLIC: |
| return true; |
| case PRIVATE: |
| return false; |
| case 0: |
| case PROTECTED: |
| return sym.packge() == packge; |
| } |
| } |
| |
| /** 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) { |
| if (tsym.kind != TYP) { |
| log.error(pos, "static.imp.only.classes.and.interfaces"); |
| return; |
| } |
| |
| final Scope toScope = env.toplevel.namedImportScope; |
| final PackageSymbol packge = env.toplevel.packge; |
| final TypeSymbol origin = tsym; |
| |
| // enter imported types immediately |
| new Object() { |
| Set<Symbol> processed = new HashSet<Symbol>(); |
| void importFrom(TypeSymbol tsym) { |
| if (tsym == null || !processed.add(tsym)) |
| return; |
| |
| // also import inherited names |
| importFrom(types.supertype(tsym.type).tsym); |
| for (Type t : types.interfaces(tsym.type)) |
| importFrom(t.tsym); |
| |
| for (Scope.Entry e = tsym.members().lookup(name); |
| e.scope != null; |
| e = e.next()) { |
| Symbol sym = e.sym; |
| if (sym.isStatic() && |
| sym.kind == TYP && |
| staticImportAccessible(sym, packge) && |
| sym.isMemberOf(origin, types) && |
| chk.checkUniqueStaticImport(pos, sym, toScope)) |
| toScope.enter(sym, sym.owner.members(), origin.members()); |
| } |
| } |
| }.importFrom(tsym); |
| |
| // enter non-types before annotations that might use them |
| annotate.earlier(new Annotate.Annotator() { |
| Set<Symbol> processed = new HashSet<Symbol>(); |
| boolean found = false; |
| |
| public String toString() { |
| return "import static " + tsym + "." + name; |
| } |
| void importFrom(TypeSymbol tsym) { |
| if (tsym == null || !processed.add(tsym)) |
| return; |
| |
| // also import inherited names |
| importFrom(types.supertype(tsym.type).tsym); |
| for (Type t : types.interfaces(tsym.type)) |
| importFrom(t.tsym); |
| |
| for (Scope.Entry e = tsym.members().lookup(name); |
| e.scope != null; |
| e = e.next()) { |
| Symbol sym = e.sym; |
| if (sym.isStatic() && |
| staticImportAccessible(sym, packge) && |
| sym.isMemberOf(origin, types)) { |
| found = true; |
| if (sym.kind == MTH || |
| sym.kind != TYP && chk.checkUniqueStaticImport(pos, sym, toScope)) |
| toScope.enter(sym, sym.owner.members(), origin.members()); |
| } |
| } |
| } |
| public void enterAnnotation() { |
| JavaFileObject prev = log.useSource(env.toplevel.sourcefile); |
| try { |
| importFrom(tsym); |
| if (!found) { |
| log.error(pos, "cant.resolve.location", |
| KindName.STATIC, |
| name, List.<Type>nil(), List.<Type>nil(), |
| Kinds.typeKindName(tsym.type), |
| tsym.type); |
| } |
| } finally { |
| log.useSource(prev); |
| } |
| } |
| }); |
| } |
| /** 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, Symbol tsym, Env<AttrContext> env) { |
| if (tsym.kind == TYP && |
| chk.checkUniqueImport(pos, tsym, env.toplevel.namedImportScope)) |
| env.toplevel.namedImportScope.enter(tsym, tsym.owner.members()); |
| } |
| |
| /** Construct method type from method signature. |
| * @param typarams The method's type parameters. |
| * @param params The method's value parameters. |
| * @param res The method's result type, |
| * null if it is a constructor. |
| * @param thrown The method's thrown exceptions. |
| * @param env The method's (local) environment. |
| */ |
| Type signature(List<JCTypeParameter> typarams, |
| List<JCVariableDecl> params, |
| JCTree res, |
| List<JCExpression> thrown, |
| Env<AttrContext> env) { |
| |
| // Enter and attribute type parameters. |
| List<Type> tvars = enter.classEnter(typarams, env); |
| attr.attribTypeVariables(typarams, env); |
| |
| // Enter and attribute value parameters. |
| ListBuffer<Type> argbuf = new ListBuffer<Type>(); |
| for (List<JCVariableDecl> l = params; l.nonEmpty(); l = l.tail) { |
| memberEnter(l.head, env); |
| argbuf.append(l.head.vartype.type); |
| } |
| |
| // Attribute result type, if one is given. |
| Type restype = res == null ? syms.voidType : attr.attribType(res, env); |
| |
| // Attribute thrown exceptions. |
| ListBuffer<Type> thrownbuf = new ListBuffer<Type>(); |
| for (List<JCExpression> l = thrown; l.nonEmpty(); l = l.tail) { |
| Type exc = attr.attribType(l.head, env); |
| if (exc.tag != TYPEVAR) |
| exc = chk.checkClassType(l.head.pos(), exc); |
| thrownbuf.append(exc); |
| } |
| Type mtype = new MethodType(argbuf.toList(), |
| restype, |
| thrownbuf.toList(), |
| syms.methodClass); |
| return tvars.isEmpty() ? mtype : new ForAll(tvars, mtype); |
| } |
| |
| /* ******************************************************************** |
| * Visitor methods for member enter |
| *********************************************************************/ |
| |
| /** Visitor argument: the current environment |
| */ |
| protected Env<AttrContext> env; |
| |
| /** Enter field and method definitions and process import |
| * clauses, catching any completion failure exceptions. |
| */ |
| protected void memberEnter(JCTree tree, Env<AttrContext> env) { |
| Env<AttrContext> prevEnv = this.env; |
| try { |
| this.env = env; |
| tree.accept(this); |
| } catch (CompletionFailure ex) { |
| chk.completionError(tree.pos(), ex); |
| } finally { |
| this.env = prevEnv; |
| } |
| } |
| |
| /** Enter members from a list of trees. |
| */ |
| void memberEnter(List<? extends JCTree> trees, Env<AttrContext> env) { |
| for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail) |
| memberEnter(l.head, env); |
| } |
| |
| /** 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(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(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), |
| 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(valueOf, env); |
| |
| // the remaining members are for bootstrapping only |
| if (!target.compilerBootstrap(tree.sym)) return; |
| |
| // public final int ordinal() { return ???; } |
| JCMethodDecl ordinal = make.at(tree.pos). |
| MethodDef(make.Modifiers(Flags.PUBLIC|Flags.FINAL), |
| names.ordinal, |
| make.Type(syms.intType), |
| List.<JCTypeParameter>nil(), |
| List.<JCVariableDecl>nil(), |
| List.<JCExpression>nil(), |
| null, |
| null); |
| memberEnter(ordinal, env); |
| |
| // public final String name() { return ???; } |
| JCMethodDecl name = make. |
| MethodDef(make.Modifiers(Flags.PUBLIC|Flags.FINAL), |
| names._name, |
| make.Type(syms.stringType), |
| List.<JCTypeParameter>nil(), |
| List.<JCVariableDecl>nil(), |
| List.<JCExpression>nil(), |
| null, |
| null); |
| memberEnter(name, env); |
| |
| // public int compareTo(E other) { return ???; } |
| MethodSymbol compareTo = new |
| MethodSymbol(Flags.PUBLIC, |
| names.compareTo, |
| new MethodType(List.of(tree.sym.type), |
| syms.intType, |
| List.<Type>nil(), |
| syms.methodClass), |
| tree.sym); |
| memberEnter(make.MethodDef(compareTo, null), env); |
| } |
| |
| public void visitTopLevel(JCCompilationUnit tree) { |
| if (tree.starImportScope.elems != null) { |
| // we must have already processed this toplevel |
| return; |
| } |
| |
| // check that no class exists with same fully qualified name as |
| // toplevel package |
| if (checkClash && tree.pid != null) { |
| Symbol p = tree.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 |
| annotateLater(tree.packageAnnotations, env, tree.packge); |
| |
| // Import-on-demand java.lang. |
| importAll(tree.pos, reader.enterPackage(names.java_lang), env); |
| |
| // Process all import clauses. |
| memberEnter(tree.defs, env); |
| } |
| |
| // process the non-static imports and the static imports of types. |
| public void visitImport(JCImport tree) { |
| JCTree imp = tree.qualid; |
| Name name = TreeInfo.name(imp); |
| TypeSymbol p; |
| |
| // Create a local environment pointing to this tree to disable |
| // effects of other imports in Resolve.findGlobalType |
| Env<AttrContext> localEnv = env.dup(tree); |
| |
| // Attribute qualifying package or class. |
| JCFieldAccess s = (JCFieldAccess) imp; |
| p = attr. |
| attribTree(s.selected, |
| localEnv, |
| tree.staticImport ? TYP : (TYP | PCK), |
| Type.noType).tsym; |
| if (name == names.asterisk) { |
| // Import on demand. |
| chk.checkCanonical(s.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); |
| chk.checkCanonical(s.selected); |
| } else { |
| TypeSymbol c = attribImportType(imp, localEnv).tsym; |
| chk.checkCanonical(imp); |
| importNamed(tree.pos(), c, env); |
| } |
| } |
| } |
| |
| public void visitMethodDef(JCMethodDecl tree) { |
| Scope enclScope = enter.enterScope(env); |
| MethodSymbol m = new MethodSymbol(0, tree.name, null, enclScope.owner); |
| m.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, m, tree); |
| tree.sym = m; |
| Env<AttrContext> localEnv = methodEnv(tree, env); |
| |
| // Compute the method type |
| m.type = signature(tree.typarams, tree.params, |
| tree.restype, tree.thrown, |
| localEnv); |
| |
| // Set m.params |
| ListBuffer<VarSymbol> params = new ListBuffer<VarSymbol>(); |
| JCVariableDecl lastParam = null; |
| for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) { |
| JCVariableDecl param = lastParam = l.head; |
| assert param.sym != null; |
| params.append(param.sym); |
| } |
| m.params = params.toList(); |
| |
| // mark the method varargs, if necessary |
| if (lastParam != null && (lastParam.mods.flags & Flags.VARARGS) != 0) |
| m.flags_field |= Flags.VARARGS; |
| |
| localEnv.info.scope.leave(); |
| if (chk.checkUnique(tree.pos(), m, enclScope)) { |
| enclScope.enter(m); |
| } |
| annotateLater(tree.mods.annotations, localEnv, m); |
| if (tree.defaultValue != null) |
| annotateDefaultValueLater(tree.defaultValue, localEnv, m); |
| } |
| |
| /** Create a fresh environment for method bodies. |
| * @param tree The method definition. |
| * @param env The environment current outside of the method definition. |
| */ |
| Env<AttrContext> methodEnv(JCMethodDecl tree, Env<AttrContext> env) { |
| Env<AttrContext> localEnv = |
| env.dup(tree, env.info.dup(env.info.scope.dupUnshared())); |
| localEnv.enclMethod = tree; |
| localEnv.info.scope.owner = tree.sym; |
| if ((tree.mods.flags & STATIC) != 0) localEnv.info.staticLevel++; |
| return localEnv; |
| } |
| |
| public void visitVarDef(JCVariableDecl tree) { |
| Env<AttrContext> localEnv = env; |
| if ((tree.mods.flags & STATIC) != 0 || |
| (env.info.scope.owner.flags() & INTERFACE) != 0) { |
| localEnv = env.dup(tree, env.info.dup()); |
| localEnv.info.staticLevel++; |
| } |
| attr.attribType(tree.vartype, localEnv); |
| Scope enclScope = enter.enterScope(env); |
| VarSymbol v = |
| new VarSymbol(0, tree.name, tree.vartype.type, enclScope.owner); |
| v.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, v, tree); |
| tree.sym = v; |
| if (tree.init != null) { |
| v.flags_field |= HASINIT; |
| if ((v.flags_field & FINAL) != 0 && tree.init.getTag() != JCTree.NEWCLASS) { |
| Env<AttrContext> initEnv = getInitEnv(tree, env); |
| initEnv.info.enclVar = v; |
| v.setLazyConstValue(initEnv(tree, initEnv), log, attr, tree.init); |
| } |
| } |
| if (chk.checkUnique(tree.pos(), v, enclScope)) { |
| chk.checkTransparentVar(tree.pos(), v, enclScope); |
| enclScope.enter(v); |
| } |
| annotateLater(tree.mods.annotations, localEnv, v); |
| v.pos = tree.pos; |
| } |
| |
| /** Create a fresh environment for a variable's initializer. |
| * If the variable is a field, the owner of the environment's scope |
| * is be the variable itself, otherwise the owner is the method |
| * enclosing the variable definition. |
| * |
| * @param tree The variable definition. |
| * @param env The environment current outside of the variable definition. |
| */ |
| Env<AttrContext> initEnv(JCVariableDecl tree, Env<AttrContext> env) { |
| Env<AttrContext> localEnv = env.dupto(new AttrContextEnv(tree, env.info.dup())); |
| if (tree.sym.owner.kind == TYP) { |
| localEnv.info.scope = new Scope.DelegatedScope(env.info.scope); |
| localEnv.info.scope.owner = tree.sym; |
| } |
| if ((tree.mods.flags & STATIC) != 0 || |
| (env.enclClass.sym.flags() & INTERFACE) != 0) |
| localEnv.info.staticLevel++; |
| return localEnv; |
| } |
| |
| /** Default member enter visitor method: do nothing |
| */ |
| public void visitTree(JCTree tree) { |
| } |
| |
| |
| public void visitErroneous(JCErroneous tree) { |
| memberEnter(tree.errs, env); |
| } |
| |
| public Env<AttrContext> getMethodEnv(JCMethodDecl tree, Env<AttrContext> env) { |
| Env<AttrContext> mEnv = methodEnv(tree, env); |
| mEnv.info.lint = mEnv.info.lint.augment(tree.sym.attributes_field, tree.sym.flags()); |
| for (List<JCTypeParameter> l = tree.typarams; l.nonEmpty(); l = l.tail) |
| mEnv.info.scope.enterIfAbsent(l.head.type.tsym); |
| for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) |
| mEnv.info.scope.enterIfAbsent(l.head.sym); |
| return mEnv; |
| } |
| |
| public Env<AttrContext> getInitEnv(JCVariableDecl tree, Env<AttrContext> env) { |
| Env<AttrContext> iEnv = initEnv(tree, env); |
| return iEnv; |
| } |
| |
| /* ******************************************************************** |
| * Type completion |
| *********************************************************************/ |
| |
| Type attribImportType(JCTree tree, Env<AttrContext> env) { |
| assert completionEnabled; |
| try { |
| // To prevent deep recursion, suppress completion of some |
| // types. |
| completionEnabled = false; |
| return attr.attribType(tree, env); |
| } finally { |
| completionEnabled = true; |
| } |
| } |
| |
| /* ******************************************************************** |
| * Annotation processing |
| *********************************************************************/ |
| |
| /** Queue annotations for later processing. */ |
| void annotateLater(final List<JCAnnotation> annotations, |
| final Env<AttrContext> localEnv, |
| final Symbol s) { |
| if (annotations.isEmpty()) return; |
| if (s.kind != PCK) s.attributes_field = null; // mark it incomplete for now |
| annotate.later(new Annotate.Annotator() { |
| public String toString() { |
| return "annotate " + annotations + " onto " + s + " in " + s.owner; |
| } |
| public void enterAnnotation() { |
| assert s.kind == PCK || s.attributes_field == null; |
| JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile); |
| try { |
| if (s.attributes_field != null && |
| s.attributes_field.nonEmpty() && |
| annotations.nonEmpty()) |
| log.error(annotations.head.pos, |
| "already.annotated", |
| kindName(s), s); |
| enterAnnotations(annotations, localEnv, s); |
| } finally { |
| log.useSource(prev); |
| } |
| } |
| }); |
| } |
| |
| /** |
| * 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.nonEmpty(); al = al.tail) { |
| JCAnnotation a = al.head; |
| if (a.annotationType.type == syms.deprecatedType && a.args.isEmpty()) |
| return true; |
| } |
| return false; |
| } |
| |
| |
| /** Enter a set of annotations. */ |
| private void enterAnnotations(List<JCAnnotation> annotations, |
| Env<AttrContext> env, |
| Symbol s) { |
| ListBuffer<Attribute.Compound> buf = |
| new ListBuffer<Attribute.Compound>(); |
| Set<TypeSymbol> annotated = new HashSet<TypeSymbol>(); |
| if (!skipAnnotations) |
| for (List<JCAnnotation> al = annotations; al.nonEmpty(); al = al.tail) { |
| JCAnnotation a = al.head; |
| Attribute.Compound c = annotate.enterAnnotation(a, |
| syms.annotationType, |
| env); |
| if (c == null) continue; |
| buf.append(c); |
| // Note: @Deprecated has no effect on local variables and parameters |
| if (!c.type.isErroneous() |
| && s.owner.kind != MTH |
| && types.isSameType(c.type, syms.deprecatedType)) |
| s.flags_field |= Flags.DEPRECATED; |
| // Internally to java.dyn, a @PolymorphicSignature annotation |
| // acts like a classfile attribute. |
| if (!c.type.isErroneous() && |
| types.isSameType(c.type, syms.polymorphicSignatureType)) { |
| if (!target.hasMethodHandles()) { |
| // Somebody is compiling JDK7 source code to a JDK6 target. |
| // Make it a strict warning, since it is unlikely but important. |
| log.strictWarning(env.tree.pos(), |
| "wrong.target.for.polymorphic.signature.definition", |
| target.name); |
| } |
| // Pull the flag through for better diagnostics, even on a bad target. |
| s.flags_field |= Flags.POLYMORPHIC_SIGNATURE; |
| } |
| if (!annotated.add(a.type.tsym)) |
| log.error(a.pos, "duplicate.annotation"); |
| } |
| s.attributes_field = buf.toList(); |
| } |
| |
| /** Queue processing of an attribute default value. */ |
| void annotateDefaultValueLater(final JCExpression defaultValue, |
| final Env<AttrContext> localEnv, |
| final MethodSymbol m) { |
| annotate.later(new Annotate.Annotator() { |
| public String toString() { |
| return "annotate " + m.owner + "." + |
| m + " default " + defaultValue; |
| } |
| public void enterAnnotation() { |
| JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile); |
| try { |
| enterDefaultValue(defaultValue, localEnv, m); |
| } finally { |
| log.useSource(prev); |
| } |
| } |
| }); |
| } |
| |
| /** Enter a default value for an attribute method. */ |
| private void enterDefaultValue(final JCExpression defaultValue, |
| final Env<AttrContext> localEnv, |
| final MethodSymbol m) { |
| m.defaultValue = annotate.enterAttributeValue(m.type.getReturnType(), |
| defaultValue, |
| localEnv); |
| } |
| |
| /* ******************************************************************** |
| * 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 (sym.flags() & Flags.COMPOUND) == 0; |
| sym.completer = this; |
| return; |
| } |
| |
| ClassSymbol c = (ClassSymbol)sym; |
| ClassType ct = (ClassType)c.type; |
| Env<AttrContext> env = enter.typeEnvs.get(c); |
| JCClassDecl tree = (JCClassDecl)env.tree; |
| boolean wasFirst = isFirst; |
| isFirst = false; |
| |
| JavaFileObject prev = log.useSource(env.toplevel.sourcefile); |
| try { |
| // Save class environment for later member enter (2) processing. |
| halfcompleted.append(env); |
| |
| // Mark class as not yet attributed. |
| c.flags_field |= UNATTRIBUTED; |
| |
| // If this is a toplevel-class, make sure any preceding import |
| // clauses have been seen. |
| if (c.owner.kind == PCK) { |
| memberEnter(env.toplevel, env.enclosing(JCTree.TOPLEVEL)); |
| todo.append(env); |
| } |
| |
| if (c.owner.kind == TYP) |
| c.owner.complete(); |
| |
| // create an environment for evaluating the base clauses |
| Env<AttrContext> baseEnv = baseEnv(tree, env); |
| |
| // Determine supertype. |
| Type supertype = |
| (tree.extending != null) |
| ? attr.attribBase(tree.extending, baseEnv, true, false, true) |
| : ((tree.mods.flags & Flags.ENUM) != 0 && !target.compilerBootstrap(c)) |
| ? attr.attribBase(enumBase(tree.pos, c), baseEnv, |
| true, false, false) |
| : (c.fullname == names.java_lang_Object) |
| ? Type.noType |
| : syms.objectType; |
| ct.supertype_field = supertype; |
| |
| // Determine interfaces. |
| ListBuffer<Type> interfaces = new ListBuffer<Type>(); |
| Set<Type> interfaceSet = new HashSet<Type>(); |
| List<JCExpression> interfaceTrees = tree.implementing; |
| if ((tree.mods.flags & Flags.ENUM) != 0 && target.compilerBootstrap(c)) { |
| // add interface Comparable<T> |
| interfaceTrees = |
| interfaceTrees.prepend(make.Type(new ClassType(syms.comparableType.getEnclosingType(), |
| List.of(c.type), |
| syms.comparableType.tsym))); |
| // add interface Serializable |
| interfaceTrees = |
| interfaceTrees.prepend(make.Type(syms.serializableType)); |
| } |
| for (JCExpression iface : interfaceTrees) { |
| Type i = attr.attribBase(iface, baseEnv, false, true, true); |
| if (i.tag == CLASS) { |
| interfaces.append(i); |
| chk.checkNotRepeated(iface.pos(), types.erasure(i), interfaceSet); |
| } |
| } |
| if ((c.flags_field & ANNOTATION) != 0) |
| ct.interfaces_field = List.of(syms.annotationType); |
| else |
| ct.interfaces_field = interfaces.toList(); |
| |
| if (c.fullname == names.java_lang_Object) { |
| if (tree.extending != null) { |
| chk.checkNonCyclic(tree.extending.pos(), |
| supertype); |
| 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)) |
| c.flags_field |= DEPRECATED; |
| annotateLater(tree.mods.annotations, baseEnv, c); |
| // class type parameters use baseEnv but everything uses env |
| for (JCTypeParameter tp : tree.typarams) |
| tp.accept(new TypeAnnotate(baseEnv)); |
| tree.accept(new TypeAnnotate(env)); |
| |
| chk.checkNonCyclicDecl(tree); |
| |
| attr.attribTypeVariables(tree.typarams, baseEnv); |
| |
| // Add default constructor if needed. |
| if ((c.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; |
| if (c.name.isEmpty()) { |
| JCNewClass nc = (JCNewClass)env.next.tree; |
| if (nc.constructor != null) { |
| Type superConstrType = types.memberType(c.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(); |
| } |
| } |
| JCTree constrDef = DefaultConstructor(make.at(tree.pos), c, |
| typarams, argtypes, thrown, |
| ctorFlags, based); |
| tree.defs = tree.defs.prepend(constrDef); |
| } |
| |
| // If this is a class, enter symbols for this and super into |
| // current scope. |
| if ((c.flags_field & INTERFACE) == 0) { |
| VarSymbol thisSym = |
| new VarSymbol(FINAL | HASINIT, names._this, c.type, c); |
| thisSym.pos = Position.FIRSTPOS; |
| env.info.scope.enter(thisSym); |
| if (ct.supertype_field.tag == CLASS) { |
| VarSymbol superSym = |
| new VarSymbol(FINAL | HASINIT, names._super, |
| ct.supertype_field, c); |
| superSym.pos = Position.FIRSTPOS; |
| env.info.scope.enter(superSym); |
| } |
| } |
| |
| // 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 && |
| c.owner.kind == PCK && c.owner != syms.unnamedPackage && |
| reader.packageExists(c.fullname)) |
| { |
| log.error(tree.pos, "clash.with.pkg.of.same.name", c); |
| } |
| |
| } catch (CompletionFailure ex) { |
| chk.completionError(tree.pos(), ex); |
| } finally { |
| log.useSource(prev); |
| } |
| |
| // Enter all member fields and methods of a set of half completed |
| // classes in a second phase. |
| if (wasFirst) { |
| try { |
| while (halfcompleted.nonEmpty()) { |
| finish(halfcompleted.next()); |
| } |
| } finally { |
| isFirst = true; |
| } |
| |
| // commit pending annotations |
| annotate.flush(); |
| } |
| } |
| |
| // A sub-phase that "compiles" annotations in annotated types. |
| private class TypeAnnotate extends TreeScanner { |
| private Env<AttrContext> env; |
| public TypeAnnotate(Env<AttrContext> env) { this.env = env; } |
| |
| private void enterTypeAnnotations(List<JCTypeAnnotation> annotations) { |
| Set<TypeSymbol> annotated = new HashSet<TypeSymbol>(); |
| if (!skipAnnotations) |
| for (List<JCTypeAnnotation> al = annotations; al.nonEmpty(); al = al.tail) { |
| JCTypeAnnotation a = al.head; |
| Attribute.Compound c = annotate.enterAnnotation(a, |
| syms.annotationType, |
| env); |
| if (c == null) continue; |
| Attribute.TypeCompound tc = new Attribute.TypeCompound(c.type, c.values, a.annotation_position); |
| a.attribute_field = tc; |
| // Note: @Deprecated has no effect on local variables and parameters |
| if (!annotated.add(a.type.tsym)) |
| log.error(a.pos, "duplicate.annotation"); |
| } |
| } |
| |
| // each class (including enclosed inner classes) should be visited |
| // separately through MemberEnter.complete(Symbol) |
| // this flag is used to prevent from visiting inner classes. |
| private boolean isEnclosingClass = false; |
| @Override |
| public void visitClassDef(final JCClassDecl tree) { |
| if (isEnclosingClass) |
| return; |
| isEnclosingClass = true; |
| scan(tree.mods); |
| // type parameter need to be visited with a separate env |
| // scan(tree.typarams); |
| scan(tree.extending); |
| scan(tree.implementing); |
| scan(tree.defs); |
| } |
| |
| private void annotate(final JCTree tree, final List<JCTypeAnnotation> annotations) { |
| annotate.later(new Annotate.Annotator() { |
| public String toString() { |
| return "annotate " + annotations + " onto " + tree; |
| } |
| public void enterAnnotation() { |
| JavaFileObject prev = log.useSource(env.toplevel.sourcefile); |
| try { |
| enterTypeAnnotations(annotations); |
| } finally { |
| log.useSource(prev); |
| } |
| } |
| }); |
| } |
| |
| @Override |
| public void visitAnnotatedType(final JCAnnotatedType tree) { |
| annotate(tree, tree.annotations); |
| super.visitAnnotatedType(tree); |
| } |
| @Override |
| public void visitTypeParameter(final JCTypeParameter tree) { |
| annotate(tree, tree.annotations); |
| super.visitTypeParameter(tree); |
| } |
| @Override |
| public void visitNewArray(final JCNewArray tree) { |
| annotate(tree, tree.annotations); |
| for (List<JCTypeAnnotation> dimAnnos : tree.dimAnnotations) |
| annotate(tree, dimAnnos); |
| super.visitNewArray(tree); |
| } |
| @Override |
| public void visitMethodDef(JCMethodDecl tree) { |
| annotate(tree, tree.receiverAnnotations); |
| super.visitMethodDef(tree); |
| } |
| } |
| |
| |
| private Env<AttrContext> baseEnv(JCClassDecl tree, Env<AttrContext> env) { |
| Scope baseScope = new Scope.ClassScope(tree.sym, scopeCounter); |
| //import already entered local classes into base scope |
| for (Scope.Entry e = env.outer.info.scope.elems ; e != null ; e = e.sibling) { |
| if (e.sym.isLocal()) { |
| baseScope.enter(e.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; |
| } |
| |
| /** Enter member fields and methods of a class |
| * @param env the environment current for the class block. |
| */ |
| private void finish(Env<AttrContext> env) { |
| JavaFileObject prev = log.useSource(env.toplevel.sourcefile); |
| try { |
| JCClassDecl tree = (JCClassDecl)env.tree; |
| finishClass(tree, env); |
| } finally { |
| log.useSource(prev); |
| } |
| } |
| |
| /** 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 |
| */ |
| private 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; |
| } |
| |
| /* *************************************************************************** |
| * 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$n? |
| */ |
| JCTree DefaultConstructor(TreeMaker make, |
| ClassSymbol c, |
| List<Type> typarams, |
| List<Type> argtypes, |
| List<Type> thrown, |
| long flags, |
| boolean based) { |
| List<JCVariableDecl> params = make.Params(argtypes, syms.noSymbol); |
| List<JCStatement> stats = List.nil(); |
| if (c.type != syms.objectType) |
| stats = stats.prepend(SuperCall(make, typarams, params, based)); |
| if ((c.flags() & ENUM) != 0 && |
| (types.supertype(c.type).tsym == syms.enumSym || |
| target.compilerBootstrap(c))) { |
| // constructors of true enums are private |
| flags = (flags & ~AccessFlags) | PRIVATE | GENERATEDCONSTR; |
| } else |
| flags |= (c.flags() & AccessFlags) | GENERATEDCONSTR; |
| if (c.name.isEmpty()) flags |= ANONCONSTR; |
| JCTree result = make.MethodDef( |
| make.Modifiers(flags), |
| names.init, |
| null, |
| make.TypeParams(typarams), |
| params, |
| make.Types(thrown), |
| make.Block(0, stats), |
| null); |
| return result; |
| } |
| |
| /** Generate call to superclass constructor. This is: |
| * |
| * super(id_0, ..., id_n) |
| * |
| * or, if based == true |
| * |
| * id_0.super(id_1,...,id_n) |
| * |
| * where id_0, ..., id_n are the names of the given parameters. |
| * |
| * @param make The tree factory |
| * @param params The parameters that need to be passed to super |
| * @param typarams The type parameters that need to be passed to super |
| * @param based Is first parameter a this$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))); |
| } |
| } |
