1679 lines
66 KiB
Java
1679 lines
66 KiB
Java
/*
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* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.tools.javac.comp;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import java.util.Set;
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import javax.tools.JavaFileObject;
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import java.util.EnumSet;
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import java.util.Set;
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import com.sun.tools.javac.code.*;
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import com.sun.tools.javac.jvm.*;
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import com.sun.tools.javac.tree.*;
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import com.sun.tools.javac.util.*;
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import com.sun.tools.javac.code.Type.*;
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import com.sun.tools.javac.code.Symbol.*;
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import com.sun.tools.javac.tree.JCTree.*;
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import static com.sun.tools.javac.code.Flags.*;
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import static com.sun.tools.javac.code.Flags.ANNOTATION;
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import static com.sun.tools.javac.code.Kinds.*;
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import static com.sun.tools.javac.code.TypeTag.CLASS;
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import static com.sun.tools.javac.code.TypeTag.ERROR;
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import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
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import static com.sun.tools.javac.tree.JCTree.Tag.*;
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import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;
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import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
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/** This is the second phase of Enter, in which classes are completed
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* by entering their members into the class scope using
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* MemberEnter.complete(). See Enter for an overview.
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*
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* <p><b>This is NOT part of any supported API.
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* If you write code that depends on this, you do so at your own risk.
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* This code and its internal interfaces are subject to change or
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* deletion without notice.</b>
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*/
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public class MemberEnter extends JCTree.Visitor implements Completer {
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protected static final Context.Key<MemberEnter> memberEnterKey =
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new Context.Key<MemberEnter>();
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/** A switch to determine whether we check for package/class conflicts
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*/
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final static boolean checkClash = true;
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private final Names names;
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private final Enter enter;
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private final Log log;
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private final Check chk;
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private final Attr attr;
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private final Symtab syms;
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private final TreeMaker make;
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private final ClassReader reader;
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private final Todo todo;
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private final Annotate annotate;
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private final TypeAnnotations typeAnnotations;
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private final Types types;
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private final JCDiagnostic.Factory diags;
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private final Source source;
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private final Target target;
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private final DeferredLintHandler deferredLintHandler;
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private final Lint lint;
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private final TypeEnvs typeEnvs;
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public static MemberEnter instance(Context context) {
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MemberEnter instance = context.get(memberEnterKey);
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if (instance == null)
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instance = new MemberEnter(context);
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return instance;
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}
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protected MemberEnter(Context context) {
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context.put(memberEnterKey, this);
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names = Names.instance(context);
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enter = Enter.instance(context);
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log = Log.instance(context);
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chk = Check.instance(context);
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attr = Attr.instance(context);
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syms = Symtab.instance(context);
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make = TreeMaker.instance(context);
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reader = ClassReader.instance(context);
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todo = Todo.instance(context);
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annotate = Annotate.instance(context);
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typeAnnotations = TypeAnnotations.instance(context);
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types = Types.instance(context);
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diags = JCDiagnostic.Factory.instance(context);
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source = Source.instance(context);
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target = Target.instance(context);
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deferredLintHandler = DeferredLintHandler.instance(context);
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lint = Lint.instance(context);
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typeEnvs = TypeEnvs.instance(context);
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allowTypeAnnos = source.allowTypeAnnotations();
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allowRepeatedAnnos = source.allowRepeatedAnnotations();
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}
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/** Switch: support type annotations.
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*/
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boolean allowTypeAnnos;
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boolean allowRepeatedAnnos;
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/** A queue for classes whose members still need to be entered into the
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* symbol table.
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*/
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ListBuffer<Env<AttrContext>> halfcompleted = new ListBuffer<Env<AttrContext>>();
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/** Set to true only when the first of a set of classes is
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* processed from the half completed queue.
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*/
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boolean isFirst = true;
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/** A flag to disable completion from time to time during member
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* enter, as we only need to look up types. This avoids
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* unnecessarily deep recursion.
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*/
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boolean completionEnabled = true;
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/* ---------- Processing import clauses ----------------
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*/
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/** Import all classes of a class or package on demand.
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* @param pos Position to be used for error reporting.
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* @param tsym The class or package the members of which are imported.
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* @param env The env in which the imported classes will be entered.
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*/
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private void importAll(int pos,
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final TypeSymbol tsym,
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Env<AttrContext> env) {
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// Check that packages imported from exist (JLS ???).
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if (tsym.kind == PCK && tsym.members().elems == null && !tsym.exists()) {
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// If we can't find java.lang, exit immediately.
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if (((PackageSymbol)tsym).fullname.equals(names.java_lang)) {
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JCDiagnostic msg = diags.fragment("fatal.err.no.java.lang");
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throw new FatalError(msg);
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} else {
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log.error(DiagnosticFlag.RESOLVE_ERROR, pos, "doesnt.exist", tsym);
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}
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}
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env.toplevel.starImportScope.importAll(tsym.members());
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}
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/** Import all static members of a class or package on demand.
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* @param pos Position to be used for error reporting.
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* @param tsym The class or package the members of which are imported.
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* @param env The env in which the imported classes will be entered.
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*/
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private void importStaticAll(int pos,
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final TypeSymbol tsym,
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Env<AttrContext> env) {
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final JavaFileObject sourcefile = env.toplevel.sourcefile;
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final Scope toScope = env.toplevel.starImportScope;
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final PackageSymbol packge = env.toplevel.packge;
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final TypeSymbol origin = tsym;
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// enter imported types immediately
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new Object() {
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Set<Symbol> processed = new HashSet<Symbol>();
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void importFrom(TypeSymbol tsym) {
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if (tsym == null || !processed.add(tsym))
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return;
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// also import inherited names
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importFrom(types.supertype(tsym.type).tsym);
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for (Type t : types.interfaces(tsym.type))
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importFrom(t.tsym);
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final Scope fromScope = tsym.members();
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for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
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Symbol sym = e.sym;
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if (sym.kind == TYP &&
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(sym.flags() & STATIC) != 0 &&
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staticImportAccessible(sym, packge) &&
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sym.isMemberOf(origin, types) &&
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!toScope.includes(sym))
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toScope.enter(sym, fromScope, origin.members(), true);
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}
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}
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}.importFrom(tsym);
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// enter non-types before annotations that might use them
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annotate.earlier(new Annotate.Worker() {
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Set<Symbol> processed = new HashSet<Symbol>();
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public String toString() {
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return "import static " + tsym + ".*" + " in " + sourcefile;
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}
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void importFrom(TypeSymbol tsym) {
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if (tsym == null || !processed.add(tsym))
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return;
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// also import inherited names
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importFrom(types.supertype(tsym.type).tsym);
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for (Type t : types.interfaces(tsym.type))
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importFrom(t.tsym);
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final Scope fromScope = tsym.members();
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for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
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Symbol sym = e.sym;
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if (sym.isStatic() && sym.kind != TYP &&
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staticImportAccessible(sym, packge) &&
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!toScope.includes(sym) &&
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sym.isMemberOf(origin, types)) {
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toScope.enter(sym, fromScope, origin.members(), true);
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}
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}
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}
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public void run() {
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importFrom(tsym);
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}
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});
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}
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// is the sym accessible everywhere in packge?
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boolean staticImportAccessible(Symbol sym, PackageSymbol packge) {
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int flags = (int)(sym.flags() & AccessFlags);
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switch (flags) {
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default:
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case PUBLIC:
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return true;
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case PRIVATE:
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return false;
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case 0:
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case PROTECTED:
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return sym.packge() == packge;
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}
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}
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/** Import statics types of a given name. Non-types are handled in Attr.
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* @param pos Position to be used for error reporting.
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* @param tsym The class from which the name is imported.
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* @param name The (simple) name being imported.
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* @param env The environment containing the named import
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* scope to add to.
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*/
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private void importNamedStatic(final DiagnosticPosition pos,
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final TypeSymbol tsym,
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final Name name,
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final Env<AttrContext> env) {
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if (tsym.kind != TYP) {
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log.error(DiagnosticFlag.RECOVERABLE, pos, "static.imp.only.classes.and.interfaces");
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return;
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}
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final Scope toScope = env.toplevel.namedImportScope;
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final PackageSymbol packge = env.toplevel.packge;
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final TypeSymbol origin = tsym;
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// enter imported types immediately
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new Object() {
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Set<Symbol> processed = new HashSet<Symbol>();
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void importFrom(TypeSymbol tsym) {
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if (tsym == null || !processed.add(tsym))
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return;
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// also import inherited names
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importFrom(types.supertype(tsym.type).tsym);
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for (Type t : types.interfaces(tsym.type))
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importFrom(t.tsym);
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for (Scope.Entry e = tsym.members().lookup(name);
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e.scope != null;
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e = e.next()) {
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Symbol sym = e.sym;
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if (sym.isStatic() &&
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sym.kind == TYP &&
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staticImportAccessible(sym, packge) &&
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sym.isMemberOf(origin, types) &&
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chk.checkUniqueStaticImport(pos, sym, toScope))
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toScope.enter(sym, sym.owner.members(), origin.members(), true);
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}
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}
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}.importFrom(tsym);
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// enter non-types before annotations that might use them
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annotate.earlier(new Annotate.Worker() {
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Set<Symbol> processed = new HashSet<Symbol>();
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boolean found = false;
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public String toString() {
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return "import static " + tsym + "." + name;
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}
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void importFrom(TypeSymbol tsym) {
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if (tsym == null || !processed.add(tsym))
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return;
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// also import inherited names
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importFrom(types.supertype(tsym.type).tsym);
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for (Type t : types.interfaces(tsym.type))
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importFrom(t.tsym);
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for (Scope.Entry e = tsym.members().lookup(name);
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e.scope != null;
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e = e.next()) {
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Symbol sym = e.sym;
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if (sym.isStatic() &&
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staticImportAccessible(sym, packge) &&
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sym.isMemberOf(origin, types)) {
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found = true;
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if (sym.kind != TYP) {
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toScope.enter(sym, sym.owner.members(), origin.members(), true);
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}
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}
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}
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}
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public void run() {
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JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
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try {
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importFrom(tsym);
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if (!found) {
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log.error(pos, "cant.resolve.location",
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KindName.STATIC,
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name, List.<Type>nil(), List.<Type>nil(),
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Kinds.typeKindName(tsym.type),
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tsym.type);
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}
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} finally {
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log.useSource(prev);
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}
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}
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});
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}
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/** Import given class.
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* @param pos Position to be used for error reporting.
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* @param tsym The class to be imported.
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* @param env The environment containing the named import
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* scope to add to.
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*/
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private void importNamed(DiagnosticPosition pos, Symbol tsym, Env<AttrContext> env) {
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if (tsym.kind == TYP &&
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chk.checkUniqueImport(pos, tsym, env.toplevel.namedImportScope))
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env.toplevel.namedImportScope.enter(tsym, tsym.owner.members());
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}
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/** Construct method type from method signature.
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* @param typarams The method's type parameters.
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* @param params The method's value parameters.
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* @param res The method's result type,
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* null if it is a constructor.
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* @param recvparam The method's receiver parameter,
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* null if none given; TODO: or already set here?
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* @param thrown The method's thrown exceptions.
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* @param env The method's (local) environment.
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*/
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Type signature(MethodSymbol msym,
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List<JCTypeParameter> typarams,
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List<JCVariableDecl> params,
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JCTree res,
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JCVariableDecl recvparam,
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List<JCExpression> thrown,
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Env<AttrContext> env) {
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// Enter and attribute type parameters.
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List<Type> tvars = enter.classEnter(typarams, env);
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attr.attribTypeVariables(typarams, env);
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// Enter and attribute value parameters.
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ListBuffer<Type> argbuf = new ListBuffer<Type>();
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for (List<JCVariableDecl> l = params; l.nonEmpty(); l = l.tail) {
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memberEnter(l.head, env);
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argbuf.append(l.head.vartype.type);
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}
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// Attribute result type, if one is given.
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Type restype = res == null ? syms.voidType : attr.attribType(res, env);
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// Attribute receiver type, if one is given.
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Type recvtype;
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if (recvparam!=null) {
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memberEnter(recvparam, env);
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recvtype = recvparam.vartype.type;
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} else {
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recvtype = null;
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}
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// Attribute thrown exceptions.
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ListBuffer<Type> thrownbuf = new ListBuffer<Type>();
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for (List<JCExpression> l = thrown; l.nonEmpty(); l = l.tail) {
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Type exc = attr.attribType(l.head, env);
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if (!exc.hasTag(TYPEVAR)) {
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exc = chk.checkClassType(l.head.pos(), exc);
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} else if (exc.tsym.owner == msym) {
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//mark inference variables in 'throws' clause
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exc.tsym.flags_field |= THROWS;
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}
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thrownbuf.append(exc);
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}
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MethodType mtype = new MethodType(argbuf.toList(),
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restype,
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thrownbuf.toList(),
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syms.methodClass);
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mtype.recvtype = recvtype;
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return tvars.isEmpty() ? mtype : new ForAll(tvars, mtype);
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}
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/* ********************************************************************
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* Visitor methods for member enter
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*********************************************************************/
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/** Visitor argument: the current environment
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*/
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protected Env<AttrContext> env;
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/** Enter field and method definitions and process import
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* clauses, catching any completion failure exceptions.
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*/
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protected void memberEnter(JCTree tree, Env<AttrContext> env) {
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Env<AttrContext> prevEnv = this.env;
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try {
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this.env = env;
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tree.accept(this);
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} catch (CompletionFailure ex) {
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chk.completionError(tree.pos(), ex);
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} finally {
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this.env = prevEnv;
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}
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}
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/** Enter members from a list of trees.
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*/
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void memberEnter(List<? extends JCTree> trees, Env<AttrContext> env) {
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for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail)
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memberEnter(l.head, env);
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}
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/** Enter members for a class.
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*/
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void finishClass(JCClassDecl tree, Env<AttrContext> env) {
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if ((tree.mods.flags & Flags.ENUM) != 0 &&
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(types.supertype(tree.sym.type).tsym.flags() & Flags.ENUM) == 0) {
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addEnumMembers(tree, env);
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}
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memberEnter(tree.defs, env);
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}
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|
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/** Add the implicit members for an enum type
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|
* to the symbol table.
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|
*/
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|
private void addEnumMembers(JCClassDecl tree, Env<AttrContext> env) {
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JCExpression valuesType = make.Type(new ArrayType(tree.sym.type, syms.arrayClass));
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|
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// public static T[] values() { return ???; }
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JCMethodDecl values = make.
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MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
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names.values,
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valuesType,
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List.<JCTypeParameter>nil(),
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List.<JCVariableDecl>nil(),
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|
List.<JCExpression>nil(), // thrown
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|
null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
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null);
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memberEnter(values, env);
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|
|
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// public static T valueOf(String name) { return ???; }
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|
JCMethodDecl valueOf = make.
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MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
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names.valueOf,
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make.Type(tree.sym.type),
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|
List.<JCTypeParameter>nil(),
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|
List.of(make.VarDef(make.Modifiers(Flags.PARAMETER |
|
|
Flags.MANDATED),
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|
names.fromString("name"),
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|
make.Type(syms.stringType), null)),
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|
List.<JCExpression>nil(), // thrown
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|
null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
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null);
|
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memberEnter(valueOf, env);
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|
}
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|
|
|
public void visitTopLevel(JCCompilationUnit tree) {
|
|
if (tree.starImportScope.elems != null) {
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|
// we must have already processed this toplevel
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|
return;
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|
}
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|
|
// 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, null);
|
|
|
|
DiagnosticPosition prevLintPos = deferredLintHandler.immediate();
|
|
Lint prevLint = chk.setLint(lint);
|
|
|
|
try {
|
|
// Import-on-demand java.lang.
|
|
importAll(tree.pos, reader.enterPackage(names.java_lang), env);
|
|
|
|
// Process all import clauses.
|
|
memberEnter(tree.defs, env);
|
|
} finally {
|
|
chk.setLint(prevLint);
|
|
deferredLintHandler.setPos(prevLintPos);
|
|
}
|
|
}
|
|
|
|
// process the non-static imports and the static imports of types.
|
|
public void visitImport(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.pos, p, env);
|
|
else
|
|
importAll(tree.pos, p, env);
|
|
} else {
|
|
// Named type import.
|
|
if (tree.staticImport) {
|
|
importNamedStatic(tree.pos(), p, name, localEnv);
|
|
chk.checkCanonical(imp.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;
|
|
|
|
//if this is a default method, add the DEFAULT flag to the enclosing interface
|
|
if ((tree.mods.flags & DEFAULT) != 0) {
|
|
m.enclClass().flags_field |= DEFAULT;
|
|
}
|
|
|
|
Env<AttrContext> localEnv = methodEnv(tree, env);
|
|
|
|
DiagnosticPosition prevLintPos = deferredLintHandler.setPos(tree.pos());
|
|
try {
|
|
// Compute the method type
|
|
m.type = signature(m, tree.typarams, tree.params,
|
|
tree.restype, tree.recvparam,
|
|
tree.thrown,
|
|
localEnv);
|
|
} finally {
|
|
deferredLintHandler.setPos(prevLintPos);
|
|
}
|
|
|
|
if (types.isSignaturePolymorphic(m)) {
|
|
m.flags_field |= SIGNATURE_POLYMORPHIC;
|
|
}
|
|
|
|
// 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;
|
|
params.append(Assert.checkNonNull(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, tree.pos());
|
|
// Visit the signature of the method. Note that
|
|
// TypeAnnotate doesn't descend into the body.
|
|
typeAnnotate(tree, localEnv, m, tree.pos());
|
|
|
|
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.sym.type != null) {
|
|
//when this is called in the enter stage, there's no type to be set
|
|
localEnv.info.returnResult = attr.new ResultInfo(VAL, tree.sym.type.getReturnType());
|
|
}
|
|
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++;
|
|
}
|
|
DiagnosticPosition prevLintPos = deferredLintHandler.setPos(tree.pos());
|
|
try {
|
|
if (TreeInfo.isEnumInit(tree)) {
|
|
attr.attribIdentAsEnumType(localEnv, (JCIdent)tree.vartype);
|
|
} else {
|
|
attr.attribType(tree.vartype, localEnv);
|
|
if (TreeInfo.isReceiverParam(tree))
|
|
checkReceiver(tree, localEnv);
|
|
}
|
|
} finally {
|
|
deferredLintHandler.setPos(prevLintPos);
|
|
}
|
|
|
|
if ((tree.mods.flags & VARARGS) != 0) {
|
|
//if we are entering a varargs parameter, we need to
|
|
//replace its type (a plain array type) with the more
|
|
//precise VarargsType --- we need to do it this way
|
|
//because varargs is represented in the tree as a
|
|
//modifier on the parameter declaration, and not as a
|
|
//distinct type of array node.
|
|
ArrayType atype = (ArrayType)tree.vartype.type.unannotatedType();
|
|
tree.vartype.type = atype.makeVarargs();
|
|
}
|
|
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 &&
|
|
needsLazyConstValue(tree.init)) {
|
|
Env<AttrContext> initEnv = getInitEnv(tree, env);
|
|
initEnv.info.enclVar = v;
|
|
v.setLazyConstValue(initEnv(tree, initEnv), attr, tree);
|
|
}
|
|
}
|
|
if (chk.checkUnique(tree.pos(), v, enclScope)) {
|
|
chk.checkTransparentVar(tree.pos(), v, enclScope);
|
|
enclScope.enter(v);
|
|
}
|
|
annotateLater(tree.mods.annotations, localEnv, v, tree.pos());
|
|
typeAnnotate(tree.vartype, env, v, tree.pos());
|
|
v.pos = tree.pos;
|
|
}
|
|
// where
|
|
void checkType(JCTree tree, Type type, String diag) {
|
|
if (!tree.type.isErroneous() && !types.isSameType(tree.type, type)) {
|
|
log.error(tree, diag, type, tree.type);
|
|
}
|
|
}
|
|
void checkReceiver(JCVariableDecl tree, Env<AttrContext> localEnv) {
|
|
attr.attribExpr(tree.nameexpr, localEnv);
|
|
MethodSymbol m = localEnv.enclMethod.sym;
|
|
if (m.isConstructor()) {
|
|
Type outertype = m.owner.owner.type;
|
|
if (outertype.hasTag(TypeTag.METHOD)) {
|
|
// we have a local inner class
|
|
outertype = m.owner.owner.owner.type;
|
|
}
|
|
if (outertype.hasTag(TypeTag.CLASS)) {
|
|
checkType(tree.vartype, outertype, "incorrect.constructor.receiver.type");
|
|
checkType(tree.nameexpr, outertype, "incorrect.constructor.receiver.name");
|
|
} else {
|
|
log.error(tree, "receiver.parameter.not.applicable.constructor.toplevel.class");
|
|
}
|
|
} else {
|
|
checkType(tree.vartype, m.owner.type, "incorrect.receiver.type");
|
|
checkType(tree.nameexpr, m.owner.type, "incorrect.receiver.name");
|
|
}
|
|
}
|
|
|
|
public boolean needsLazyConstValue(JCTree tree) {
|
|
InitTreeVisitor initTreeVisitor = new InitTreeVisitor();
|
|
tree.accept(initTreeVisitor);
|
|
return initTreeVisitor.result;
|
|
}
|
|
|
|
/** Visitor class for expressions which might be constant expressions,
|
|
* as per JLS 15.28 (Constant Expressions).
|
|
*/
|
|
static class InitTreeVisitor extends JCTree.Visitor {
|
|
|
|
private static final Set<Tag> ALLOWED_OPERATORS =
|
|
EnumSet.of(Tag.POS, Tag.NEG, Tag.NOT, Tag.COMPL, Tag.PLUS, Tag.MINUS,
|
|
Tag.MUL, Tag.DIV, Tag.MOD, Tag.SL, Tag.SR, Tag.USR,
|
|
Tag.LT, Tag.LE, Tag.GT, Tag.GE, Tag.EQ, Tag.NE,
|
|
Tag.BITAND, Tag.BITXOR, Tag.BITOR, Tag.AND, Tag.OR);
|
|
|
|
private boolean result = true;
|
|
|
|
@Override
|
|
public void visitTree(JCTree tree) {
|
|
result = false;
|
|
}
|
|
|
|
@Override
|
|
public void visitLiteral(JCLiteral that) {}
|
|
|
|
@Override
|
|
public void visitTypeCast(JCTypeCast tree) {
|
|
tree.expr.accept(this);
|
|
}
|
|
|
|
@Override
|
|
public void visitUnary(JCUnary that) {
|
|
if (!ALLOWED_OPERATORS.contains(that.getTag())) {
|
|
result = false;
|
|
return ;
|
|
}
|
|
that.arg.accept(this);
|
|
}
|
|
|
|
@Override
|
|
public void visitBinary(JCBinary that) {
|
|
if (!ALLOWED_OPERATORS.contains(that.getTag())) {
|
|
result = false;
|
|
return ;
|
|
}
|
|
that.lhs.accept(this);
|
|
that.rhs.accept(this);
|
|
}
|
|
|
|
@Override
|
|
public void visitConditional(JCConditional tree) {
|
|
tree.cond.accept(this);
|
|
tree.truepart.accept(this);
|
|
tree.falsepart.accept(this);
|
|
}
|
|
|
|
@Override
|
|
public void visitParens(JCParens tree) {
|
|
tree.expr.accept(this);
|
|
}
|
|
|
|
@Override
|
|
public void visitIdent(JCIdent that) {}
|
|
|
|
@Override
|
|
public void visitSelect(JCFieldAccess tree) {
|
|
tree.selected.accept(this);
|
|
}
|
|
}
|
|
|
|
/** 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 = env.info.scope.dupUnshared();
|
|
localEnv.info.scope.owner = tree.sym;
|
|
}
|
|
if ((tree.mods.flags & STATIC) != 0 ||
|
|
((env.enclClass.sym.flags() & INTERFACE) != 0 && env.enclMethod == null))
|
|
localEnv.info.staticLevel++;
|
|
return localEnv;
|
|
}
|
|
|
|
/** Default member enter visitor method: do nothing
|
|
*/
|
|
public void visitTree(JCTree tree) {
|
|
}
|
|
|
|
public void visitErroneous(JCErroneous tree) {
|
|
if (tree.errs != null)
|
|
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);
|
|
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.check(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,
|
|
final DiagnosticPosition deferPos) {
|
|
if (annotations.isEmpty()) {
|
|
return;
|
|
}
|
|
if (s.kind != PCK) {
|
|
s.resetAnnotations(); // mark Annotations as incomplete for now
|
|
}
|
|
annotate.normal(new Annotate.Worker() {
|
|
@Override
|
|
public String toString() {
|
|
return "annotate " + annotations + " onto " + s + " in " + s.owner;
|
|
}
|
|
|
|
@Override
|
|
public void run() {
|
|
Assert.check(s.kind == PCK || s.annotationsPendingCompletion());
|
|
JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
|
|
DiagnosticPosition prevLintPos =
|
|
deferPos != null
|
|
? deferredLintHandler.setPos(deferPos)
|
|
: deferredLintHandler.immediate();
|
|
Lint prevLint = deferPos != null ? null : chk.setLint(lint);
|
|
try {
|
|
if (s.hasAnnotations() &&
|
|
annotations.nonEmpty())
|
|
log.error(annotations.head.pos,
|
|
"already.annotated",
|
|
kindName(s), s);
|
|
actualEnterAnnotations(annotations, localEnv, s);
|
|
} finally {
|
|
if (prevLint != null)
|
|
chk.setLint(prevLint);
|
|
deferredLintHandler.setPos(prevLintPos);
|
|
log.useSource(prev);
|
|
}
|
|
}
|
|
});
|
|
|
|
annotate.validate(new Annotate.Worker() { //validate annotations
|
|
@Override
|
|
public void run() {
|
|
JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
|
|
try {
|
|
chk.validateAnnotations(annotations, 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.isEmpty(); 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 actualEnterAnnotations(List<JCAnnotation> annotations,
|
|
Env<AttrContext> env,
|
|
Symbol s) {
|
|
Map<TypeSymbol, ListBuffer<Attribute.Compound>> annotated =
|
|
new LinkedHashMap<TypeSymbol, ListBuffer<Attribute.Compound>>();
|
|
Map<Attribute.Compound, DiagnosticPosition> pos =
|
|
new HashMap<Attribute.Compound, DiagnosticPosition>();
|
|
|
|
for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
|
|
JCAnnotation a = al.head;
|
|
Attribute.Compound c = annotate.enterAnnotation(a,
|
|
syms.annotationType,
|
|
env);
|
|
if (c == null) {
|
|
continue;
|
|
}
|
|
|
|
if (annotated.containsKey(a.type.tsym)) {
|
|
if (!allowRepeatedAnnos) {
|
|
log.error(a.pos(), "repeatable.annotations.not.supported.in.source");
|
|
allowRepeatedAnnos = true;
|
|
}
|
|
ListBuffer<Attribute.Compound> l = annotated.get(a.type.tsym);
|
|
l = l.append(c);
|
|
annotated.put(a.type.tsym, l);
|
|
pos.put(c, a.pos());
|
|
} else {
|
|
annotated.put(a.type.tsym, ListBuffer.of(c));
|
|
pos.put(c, a.pos());
|
|
}
|
|
|
|
// 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;
|
|
}
|
|
}
|
|
|
|
s.setDeclarationAttributesWithCompletion(
|
|
annotate.new AnnotateRepeatedContext<Attribute.Compound>(env, annotated, pos, log, false));
|
|
}
|
|
|
|
/** Queue processing of an attribute default value. */
|
|
void annotateDefaultValueLater(final JCExpression defaultValue,
|
|
final Env<AttrContext> localEnv,
|
|
final MethodSymbol m) {
|
|
annotate.normal(new Annotate.Worker() {
|
|
@Override
|
|
public String toString() {
|
|
return "annotate " + m.owner + "." +
|
|
m + " default " + defaultValue;
|
|
}
|
|
|
|
@Override
|
|
public void run() {
|
|
JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
|
|
try {
|
|
enterDefaultValue(defaultValue, localEnv, m);
|
|
} finally {
|
|
log.useSource(prev);
|
|
}
|
|
}
|
|
});
|
|
annotate.validate(new Annotate.Worker() { //validate annotations
|
|
@Override
|
|
public void run() {
|
|
JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
|
|
try {
|
|
// if default value is an annotation, check it is a well-formed
|
|
// annotation value (e.g. no duplicate values, no missing values, etc.)
|
|
chk.validateAnnotationTree(defaultValue);
|
|
} 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.check((sym.flags() & Flags.COMPOUND) == 0);
|
|
sym.completer = this;
|
|
return;
|
|
}
|
|
|
|
ClassSymbol c = (ClassSymbol)sym;
|
|
ClassType ct = (ClassType)c.type;
|
|
Env<AttrContext> env = typeEnvs.get(c);
|
|
JCClassDecl tree = (JCClassDecl)env.tree;
|
|
boolean wasFirst = isFirst;
|
|
isFirst = false;
|
|
try {
|
|
annotate.enterStart();
|
|
|
|
JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
|
|
DiagnosticPosition prevLintPos = deferredLintHandler.setPos(tree.pos());
|
|
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(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);
|
|
|
|
if (tree.extending != null)
|
|
typeAnnotate(tree.extending, baseEnv, sym, tree.pos());
|
|
for (JCExpression impl : tree.implementing)
|
|
typeAnnotate(impl, baseEnv, sym, tree.pos());
|
|
annotate.flush();
|
|
|
|
// Determine supertype.
|
|
Type supertype =
|
|
(tree.extending != null)
|
|
? attr.attribBase(tree.extending, baseEnv, true, false, true)
|
|
: ((tree.mods.flags & Flags.ENUM) != 0)
|
|
? attr.attribBase(enumBase(tree.pos, c), baseEnv,
|
|
true, false, false)
|
|
: (c.fullname == names.java_lang_Object)
|
|
? Type.noType
|
|
: syms.objectType;
|
|
ct.supertype_field = modelMissingTypes(supertype, tree.extending, false);
|
|
|
|
// Determine interfaces.
|
|
ListBuffer<Type> interfaces = new ListBuffer<Type>();
|
|
ListBuffer<Type> all_interfaces = null; // lazy init
|
|
Set<Type> interfaceSet = new HashSet<Type>();
|
|
List<JCExpression> interfaceTrees = tree.implementing;
|
|
for (JCExpression iface : interfaceTrees) {
|
|
Type i = attr.attribBase(iface, baseEnv, false, true, true);
|
|
if (i.hasTag(CLASS)) {
|
|
interfaces.append(i);
|
|
if (all_interfaces != null) all_interfaces.append(i);
|
|
chk.checkNotRepeated(iface.pos(), types.erasure(i), interfaceSet);
|
|
} else {
|
|
if (all_interfaces == null)
|
|
all_interfaces = new ListBuffer<Type>().appendList(interfaces);
|
|
all_interfaces.append(modelMissingTypes(i, iface, true));
|
|
}
|
|
}
|
|
if ((c.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();
|
|
}
|
|
|
|
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, tree.pos());
|
|
// class type parameters use baseEnv but everything uses env
|
|
|
|
chk.checkNonCyclicDecl(tree);
|
|
|
|
attr.attribTypeVariables(tree.typarams, baseEnv);
|
|
// Do this here, where we have the symbol.
|
|
for (JCTypeParameter tp : tree.typarams)
|
|
typeAnnotate(tp, baseEnv, sym, tree.pos());
|
|
|
|
// 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;
|
|
boolean addConstructor = true;
|
|
JCNewClass nc = null;
|
|
if (c.name.isEmpty()) {
|
|
nc = (JCNewClass)env.next.tree;
|
|
if (nc.constructor != null) {
|
|
addConstructor = nc.constructor.kind != ERR;
|
|
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();
|
|
}
|
|
}
|
|
if (addConstructor) {
|
|
MethodSymbol basedConstructor = nc != null ?
|
|
(MethodSymbol)nc.constructor : null;
|
|
JCTree constrDef = DefaultConstructor(make.at(tree.pos), c,
|
|
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, c.type, c);
|
|
thisSym.pos = Position.FIRSTPOS;
|
|
env.info.scope.enter(thisSym);
|
|
// if this is a class, enter symbol for 'super' into current scope.
|
|
if ((c.flags_field & INTERFACE) == 0 &&
|
|
ct.supertype_field.hasTag(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", Kinds.kindName(sym), c);
|
|
}
|
|
if (c.owner.kind == PCK && (c.flags_field & PUBLIC) == 0 &&
|
|
!env.toplevel.sourcefile.isNameCompatible(c.name.toString(),JavaFileObject.Kind.SOURCE)) {
|
|
c.flags_field |= AUXILIARY;
|
|
}
|
|
} catch (CompletionFailure ex) {
|
|
chk.completionError(tree.pos(), ex);
|
|
} finally {
|
|
deferredLintHandler.setPos(prevLintPos);
|
|
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()) {
|
|
Env<AttrContext> toFinish = halfcompleted.next();
|
|
finish(toFinish);
|
|
if (allowTypeAnnos) {
|
|
typeAnnotations.organizeTypeAnnotationsSignatures(toFinish, (JCClassDecl)toFinish.tree);
|
|
typeAnnotations.validateTypeAnnotationsSignatures(toFinish, (JCClassDecl)toFinish.tree);
|
|
}
|
|
}
|
|
} finally {
|
|
isFirst = true;
|
|
}
|
|
}
|
|
} finally {
|
|
annotate.enterDone();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the symbol is non-null, attach the type annotation to it.
|
|
*/
|
|
private void actualEnterTypeAnnotations(final List<JCAnnotation> annotations,
|
|
final Env<AttrContext> env,
|
|
final Symbol s) {
|
|
Map<TypeSymbol, ListBuffer<Attribute.TypeCompound>> annotated =
|
|
new LinkedHashMap<TypeSymbol, ListBuffer<Attribute.TypeCompound>>();
|
|
Map<Attribute.TypeCompound, DiagnosticPosition> pos =
|
|
new HashMap<Attribute.TypeCompound, DiagnosticPosition>();
|
|
|
|
for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
|
|
JCAnnotation a = al.head;
|
|
Attribute.TypeCompound tc = annotate.enterTypeAnnotation(a,
|
|
syms.annotationType,
|
|
env);
|
|
if (tc == null) {
|
|
continue;
|
|
}
|
|
|
|
if (annotated.containsKey(a.type.tsym)) {
|
|
if (source.allowRepeatedAnnotations()) {
|
|
ListBuffer<Attribute.TypeCompound> l = annotated.get(a.type.tsym);
|
|
l = l.append(tc);
|
|
annotated.put(a.type.tsym, l);
|
|
pos.put(tc, a.pos());
|
|
} else {
|
|
log.error(a.pos(), "repeatable.annotations.not.supported.in.source");
|
|
}
|
|
} else {
|
|
annotated.put(a.type.tsym, ListBuffer.of(tc));
|
|
pos.put(tc, a.pos());
|
|
}
|
|
}
|
|
|
|
if (s != null) {
|
|
s.appendTypeAttributesWithCompletion(
|
|
annotate.new AnnotateRepeatedContext<Attribute.TypeCompound>(env, annotated, pos, log, true));
|
|
}
|
|
}
|
|
|
|
public void typeAnnotate(final JCTree tree, final Env<AttrContext> env, final Symbol sym, DiagnosticPosition deferPos) {
|
|
if (allowTypeAnnos) {
|
|
tree.accept(new TypeAnnotate(env, sym, deferPos));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* We need to use a TreeScanner, because it is not enough to visit the top-level
|
|
* annotations. We also need to visit type arguments, etc.
|
|
*/
|
|
private class TypeAnnotate extends TreeScanner {
|
|
private Env<AttrContext> env;
|
|
private Symbol sym;
|
|
private DiagnosticPosition deferPos;
|
|
|
|
public TypeAnnotate(final Env<AttrContext> env, final Symbol sym, DiagnosticPosition deferPos) {
|
|
this.env = env;
|
|
this.sym = sym;
|
|
this.deferPos = deferPos;
|
|
}
|
|
|
|
void annotateTypeLater(final List<JCAnnotation> annotations) {
|
|
if (annotations.isEmpty()) {
|
|
return;
|
|
}
|
|
|
|
final DiagnosticPosition deferPos = this.deferPos;
|
|
|
|
annotate.normal(new Annotate.Worker() {
|
|
@Override
|
|
public String toString() {
|
|
return "type annotate " + annotations + " onto " + sym + " in " + sym.owner;
|
|
}
|
|
@Override
|
|
public void run() {
|
|
JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
|
|
DiagnosticPosition prevLintPos = null;
|
|
|
|
if (deferPos != null) {
|
|
prevLintPos = deferredLintHandler.setPos(deferPos);
|
|
}
|
|
try {
|
|
actualEnterTypeAnnotations(annotations, env, sym);
|
|
} finally {
|
|
if (prevLintPos != null)
|
|
deferredLintHandler.setPos(prevLintPos);
|
|
log.useSource(prev);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
@Override
|
|
public void visitAnnotatedType(final JCAnnotatedType tree) {
|
|
annotateTypeLater(tree.annotations);
|
|
super.visitAnnotatedType(tree);
|
|
}
|
|
|
|
@Override
|
|
public void visitTypeParameter(final JCTypeParameter tree) {
|
|
annotateTypeLater(tree.annotations);
|
|
super.visitTypeParameter(tree);
|
|
}
|
|
|
|
@Override
|
|
public void visitNewArray(final JCNewArray tree) {
|
|
annotateTypeLater(tree.annotations);
|
|
for (List<JCAnnotation> dimAnnos : tree.dimAnnotations)
|
|
annotateTypeLater(dimAnnos);
|
|
super.visitNewArray(tree);
|
|
}
|
|
|
|
@Override
|
|
public void visitMethodDef(final JCMethodDecl tree) {
|
|
scan(tree.mods);
|
|
scan(tree.restype);
|
|
scan(tree.typarams);
|
|
scan(tree.recvparam);
|
|
scan(tree.params);
|
|
scan(tree.thrown);
|
|
scan(tree.defaultValue);
|
|
// Do not annotate the body, just the signature.
|
|
// scan(tree.body);
|
|
}
|
|
|
|
@Override
|
|
public void visitVarDef(final JCVariableDecl tree) {
|
|
DiagnosticPosition prevPos = deferPos;
|
|
deferPos = tree.pos();
|
|
try {
|
|
if (sym != null && sym.kind == Kinds.VAR) {
|
|
// Don't visit a parameter once when the sym is the method
|
|
// and once when the sym is the parameter.
|
|
scan(tree.mods);
|
|
scan(tree.vartype);
|
|
}
|
|
scan(tree.init);
|
|
} finally {
|
|
deferPos = prevPos;
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void visitClassDef(JCClassDecl tree) {
|
|
// We can only hit a classdef if it is declared within
|
|
// a method. Ignore it - the class will be visited
|
|
// separately later.
|
|
}
|
|
|
|
@Override
|
|
public void visitNewClass(JCNewClass tree) {
|
|
if (tree.def == null) {
|
|
// For an anonymous class instantiation the class
|
|
// will be visited separately.
|
|
super.visitNewClass(tree);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
private Env<AttrContext> baseEnv(JCClassDecl tree, Env<AttrContext> env) {
|
|
Scope baseScope = new Scope(tree.sym);
|
|
//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;
|
|
}
|
|
|
|
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<Type>();
|
|
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
|
|
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
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* ***************************************************************************
|
|
* 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)));
|
|
}
|
|
}
|