Mercurial > jdk8-mips64-public > langtools / file revision
src/share/classes/com/sun/tools/javac/comp/MemberEnter.java@959103a6100f
src/share/classes/com/sun/tools/javac/comp/MemberEnter.java
Wed, 27 Apr 2016 01:34:52 +0800
- author
- aoqi
- date
- Wed, 27 Apr 2016 01:34:52 +0800
- changeset 0
- 959103a6100f
- child 2525
- 2eb010b6cb22
- permissions
- -rw-r--r--
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/langtools/
changeset: 2573:53ca196be1ae
tag: jdk8u25-b17
1 /*
2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
26 package com.sun.tools.javac.comp;
28 import java.util.HashMap;
29 import java.util.HashSet;
30 import java.util.LinkedHashMap;
31 import java.util.Map;
32 import java.util.Set;
34 import javax.tools.JavaFileObject;
36 import com.sun.tools.javac.code.*;
37 import com.sun.tools.javac.jvm.*;
38 import com.sun.tools.javac.tree.*;
39 import com.sun.tools.javac.util.*;
41 import com.sun.tools.javac.code.Type.*;
42 import com.sun.tools.javac.code.Symbol.*;
43 import com.sun.tools.javac.tree.JCTree.*;
45 import static com.sun.tools.javac.code.Flags.*;
46 import static com.sun.tools.javac.code.Flags.ANNOTATION;
47 import static com.sun.tools.javac.code.Kinds.*;
48 import static com.sun.tools.javac.code.TypeTag.CLASS;
49 import static com.sun.tools.javac.code.TypeTag.ERROR;
50 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
51 import static com.sun.tools.javac.tree.JCTree.Tag.*;
52 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;
53 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
55 /** This is the second phase of Enter, in which classes are completed
56 * by entering their members into the class scope using
57 * MemberEnter.complete(). See Enter for an overview.
58 *
59 * <p><b>This is NOT part of any supported API.
60 * If you write code that depends on this, you do so at your own risk.
61 * This code and its internal interfaces are subject to change or
62 * deletion without notice.</b>
63 */
64 public class MemberEnter extends JCTree.Visitor implements Completer {
65 protected static final Context.Key<MemberEnter> memberEnterKey =
66 new Context.Key<MemberEnter>();
68 /** A switch to determine whether we check for package/class conflicts
69 */
70 final static boolean checkClash = true;
72 private final Names names;
73 private final Enter enter;
74 private final Log log;
75 private final Check chk;
76 private final Attr attr;
77 private final Symtab syms;
78 private final TreeMaker make;
79 private final ClassReader reader;
80 private final Todo todo;
81 private final Annotate annotate;
82 private final TypeAnnotations typeAnnotations;
83 private final Types types;
84 private final JCDiagnostic.Factory diags;
85 private final Source source;
86 private final Target target;
87 private final DeferredLintHandler deferredLintHandler;
88 private final Lint lint;
89 private final TypeEnvs typeEnvs;
91 public static MemberEnter instance(Context context) {
92 MemberEnter instance = context.get(memberEnterKey);
93 if (instance == null)
94 instance = new MemberEnter(context);
95 return instance;
96 }
98 protected MemberEnter(Context context) {
99 context.put(memberEnterKey, this);
100 names = Names.instance(context);
101 enter = Enter.instance(context);
102 log = Log.instance(context);
103 chk = Check.instance(context);
104 attr = Attr.instance(context);
105 syms = Symtab.instance(context);
106 make = TreeMaker.instance(context);
107 reader = ClassReader.instance(context);
108 todo = Todo.instance(context);
109 annotate = Annotate.instance(context);
110 typeAnnotations = TypeAnnotations.instance(context);
111 types = Types.instance(context);
112 diags = JCDiagnostic.Factory.instance(context);
113 source = Source.instance(context);
114 target = Target.instance(context);
115 deferredLintHandler = DeferredLintHandler.instance(context);
116 lint = Lint.instance(context);
117 typeEnvs = TypeEnvs.instance(context);
118 allowTypeAnnos = source.allowTypeAnnotations();
119 allowRepeatedAnnos = source.allowRepeatedAnnotations();
120 }
122 /** Switch: support type annotations.
123 */
124 boolean allowTypeAnnos;
126 boolean allowRepeatedAnnos;
128 /** A queue for classes whose members still need to be entered into the
129 * symbol table.
130 */
131 ListBuffer<Env<AttrContext>> halfcompleted = new ListBuffer<Env<AttrContext>>();
133 /** Set to true only when the first of a set of classes is
134 * processed from the half completed queue.
135 */
136 boolean isFirst = true;
138 /** A flag to disable completion from time to time during member
139 * enter, as we only need to look up types. This avoids
140 * unnecessarily deep recursion.
141 */
142 boolean completionEnabled = true;
144 /* ---------- Processing import clauses ----------------
145 */
147 /** Import all classes of a class or package on demand.
148 * @param pos Position to be used for error reporting.
149 * @param tsym The class or package the members of which are imported.
150 * @param env The env in which the imported classes will be entered.
151 */
152 private void importAll(int pos,
153 final TypeSymbol tsym,
154 Env<AttrContext> env) {
155 // Check that packages imported from exist (JLS ???).
156 if (tsym.kind == PCK && tsym.members().elems == null && !tsym.exists()) {
157 // If we can't find java.lang, exit immediately.
158 if (((PackageSymbol)tsym).fullname.equals(names.java_lang)) {
159 JCDiagnostic msg = diags.fragment("fatal.err.no.java.lang");
160 throw new FatalError(msg);
161 } else {
162 log.error(DiagnosticFlag.RESOLVE_ERROR, pos, "doesnt.exist", tsym);
163 }
164 }
165 env.toplevel.starImportScope.importAll(tsym.members());
166 }
168 /** Import all static members of a class or package on demand.
169 * @param pos Position to be used for error reporting.
170 * @param tsym The class or package the members of which are imported.
171 * @param env The env in which the imported classes will be entered.
172 */
173 private void importStaticAll(int pos,
174 final TypeSymbol tsym,
175 Env<AttrContext> env) {
176 final JavaFileObject sourcefile = env.toplevel.sourcefile;
177 final Scope toScope = env.toplevel.starImportScope;
178 final PackageSymbol packge = env.toplevel.packge;
179 final TypeSymbol origin = tsym;
181 // enter imported types immediately
182 new Object() {
183 Set<Symbol> processed = new HashSet<Symbol>();
184 void importFrom(TypeSymbol tsym) {
185 if (tsym == null || !processed.add(tsym))
186 return;
188 // also import inherited names
189 importFrom(types.supertype(tsym.type).tsym);
190 for (Type t : types.interfaces(tsym.type))
191 importFrom(t.tsym);
193 final Scope fromScope = tsym.members();
194 for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
195 Symbol sym = e.sym;
196 if (sym.kind == TYP &&
197 (sym.flags() & STATIC) != 0 &&
198 staticImportAccessible(sym, packge) &&
199 sym.isMemberOf(origin, types) &&
200 !toScope.includes(sym))
201 toScope.enter(sym, fromScope, origin.members(), true);
202 }
203 }
204 }.importFrom(tsym);
206 // enter non-types before annotations that might use them
207 annotate.earlier(new Annotate.Worker() {
208 Set<Symbol> processed = new HashSet<Symbol>();
210 public String toString() {
211 return "import static " + tsym + ".*" + " in " + sourcefile;
212 }
213 void importFrom(TypeSymbol tsym) {
214 if (tsym == null || !processed.add(tsym))
215 return;
217 // also import inherited names
218 importFrom(types.supertype(tsym.type).tsym);
219 for (Type t : types.interfaces(tsym.type))
220 importFrom(t.tsym);
222 final Scope fromScope = tsym.members();
223 for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
224 Symbol sym = e.sym;
225 if (sym.isStatic() && sym.kind != TYP &&
226 staticImportAccessible(sym, packge) &&
227 !toScope.includes(sym) &&
228 sym.isMemberOf(origin, types)) {
229 toScope.enter(sym, fromScope, origin.members(), true);
230 }
231 }
232 }
233 public void run() {
234 importFrom(tsym);
235 }
236 });
237 }
239 // is the sym accessible everywhere in packge?
240 boolean staticImportAccessible(Symbol sym, PackageSymbol packge) {
241 int flags = (int)(sym.flags() & AccessFlags);
242 switch (flags) {
243 default:
244 case PUBLIC:
245 return true;
246 case PRIVATE:
247 return false;
248 case 0:
249 case PROTECTED:
250 return sym.packge() == packge;
251 }
252 }
254 /** Import statics types of a given name. Non-types are handled in Attr.
255 * @param pos Position to be used for error reporting.
256 * @param tsym The class from which the name is imported.
257 * @param name The (simple) name being imported.
258 * @param env The environment containing the named import
259 * scope to add to.
260 */
261 private void importNamedStatic(final DiagnosticPosition pos,
262 final TypeSymbol tsym,
263 final Name name,
264 final Env<AttrContext> env) {
265 if (tsym.kind != TYP) {
266 log.error(DiagnosticFlag.RECOVERABLE, pos, "static.imp.only.classes.and.interfaces");
267 return;
268 }
270 final Scope toScope = env.toplevel.namedImportScope;
271 final PackageSymbol packge = env.toplevel.packge;
272 final TypeSymbol origin = tsym;
274 // enter imported types immediately
275 new Object() {
276 Set<Symbol> processed = new HashSet<Symbol>();
277 void importFrom(TypeSymbol tsym) {
278 if (tsym == null || !processed.add(tsym))
279 return;
281 // also import inherited names
282 importFrom(types.supertype(tsym.type).tsym);
283 for (Type t : types.interfaces(tsym.type))
284 importFrom(t.tsym);
286 for (Scope.Entry e = tsym.members().lookup(name);
287 e.scope != null;
288 e = e.next()) {
289 Symbol sym = e.sym;
290 if (sym.isStatic() &&
291 sym.kind == TYP &&
292 staticImportAccessible(sym, packge) &&
293 sym.isMemberOf(origin, types) &&
294 chk.checkUniqueStaticImport(pos, sym, toScope))
295 toScope.enter(sym, sym.owner.members(), origin.members(), true);
296 }
297 }
298 }.importFrom(tsym);
300 // enter non-types before annotations that might use them
301 annotate.earlier(new Annotate.Worker() {
302 Set<Symbol> processed = new HashSet<Symbol>();
303 boolean found = false;
305 public String toString() {
306 return "import static " + tsym + "." + name;
307 }
308 void importFrom(TypeSymbol tsym) {
309 if (tsym == null || !processed.add(tsym))
310 return;
312 // also import inherited names
313 importFrom(types.supertype(tsym.type).tsym);
314 for (Type t : types.interfaces(tsym.type))
315 importFrom(t.tsym);
317 for (Scope.Entry e = tsym.members().lookup(name);
318 e.scope != null;
319 e = e.next()) {
320 Symbol sym = e.sym;
321 if (sym.isStatic() &&
322 staticImportAccessible(sym, packge) &&
323 sym.isMemberOf(origin, types)) {
324 found = true;
325 if (sym.kind != TYP) {
326 toScope.enter(sym, sym.owner.members(), origin.members(), true);
327 }
328 }
329 }
330 }
331 public void run() {
332 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
333 try {
334 importFrom(tsym);
335 if (!found) {
336 log.error(pos, "cant.resolve.location",
337 KindName.STATIC,
338 name, List.<Type>nil(), List.<Type>nil(),
339 Kinds.typeKindName(tsym.type),
340 tsym.type);
341 }
342 } finally {
343 log.useSource(prev);
344 }
345 }
346 });
347 }
348 /** Import given class.
349 * @param pos Position to be used for error reporting.
350 * @param tsym The class to be imported.
351 * @param env The environment containing the named import
352 * scope to add to.
353 */
354 private void importNamed(DiagnosticPosition pos, Symbol tsym, Env<AttrContext> env) {
355 if (tsym.kind == TYP &&
356 chk.checkUniqueImport(pos, tsym, env.toplevel.namedImportScope))
357 env.toplevel.namedImportScope.enter(tsym, tsym.owner.members());
358 }
360 /** Construct method type from method signature.
361 * @param typarams The method's type parameters.
362 * @param params The method's value parameters.
363 * @param res The method's result type,
364 * null if it is a constructor.
365 * @param recvparam The method's receiver parameter,
366 * null if none given; TODO: or already set here?
367 * @param thrown The method's thrown exceptions.
368 * @param env The method's (local) environment.
369 */
370 Type signature(MethodSymbol msym,
371 List<JCTypeParameter> typarams,
372 List<JCVariableDecl> params,
373 JCTree res,
374 JCVariableDecl recvparam,
375 List<JCExpression> thrown,
376 Env<AttrContext> env) {
378 // Enter and attribute type parameters.
379 List<Type> tvars = enter.classEnter(typarams, env);
380 attr.attribTypeVariables(typarams, env);
382 // Enter and attribute value parameters.
383 ListBuffer<Type> argbuf = new ListBuffer<Type>();
384 for (List<JCVariableDecl> l = params; l.nonEmpty(); l = l.tail) {
385 memberEnter(l.head, env);
386 argbuf.append(l.head.vartype.type);
387 }
389 // Attribute result type, if one is given.
390 Type restype = res == null ? syms.voidType : attr.attribType(res, env);
392 // Attribute receiver type, if one is given.
393 Type recvtype;
394 if (recvparam!=null) {
395 memberEnter(recvparam, env);
396 recvtype = recvparam.vartype.type;
397 } else {
398 recvtype = null;
399 }
401 // Attribute thrown exceptions.
402 ListBuffer<Type> thrownbuf = new ListBuffer<Type>();
403 for (List<JCExpression> l = thrown; l.nonEmpty(); l = l.tail) {
404 Type exc = attr.attribType(l.head, env);
405 if (!exc.hasTag(TYPEVAR)) {
406 exc = chk.checkClassType(l.head.pos(), exc);
407 } else if (exc.tsym.owner == msym) {
408 //mark inference variables in 'throws' clause
409 exc.tsym.flags_field |= THROWS;
410 }
411 thrownbuf.append(exc);
412 }
413 MethodType mtype = new MethodType(argbuf.toList(),
414 restype,
415 thrownbuf.toList(),
416 syms.methodClass);
417 mtype.recvtype = recvtype;
419 return tvars.isEmpty() ? mtype : new ForAll(tvars, mtype);
420 }
422 /* ********************************************************************
423 * Visitor methods for member enter
424 *********************************************************************/
426 /** Visitor argument: the current environment
427 */
428 protected Env<AttrContext> env;
430 /** Enter field and method definitions and process import
431 * clauses, catching any completion failure exceptions.
432 */
433 protected void memberEnter(JCTree tree, Env<AttrContext> env) {
434 Env<AttrContext> prevEnv = this.env;
435 try {
436 this.env = env;
437 tree.accept(this);
438 } catch (CompletionFailure ex) {
439 chk.completionError(tree.pos(), ex);
440 } finally {
441 this.env = prevEnv;
442 }
443 }
445 /** Enter members from a list of trees.
446 */
447 void memberEnter(List<? extends JCTree> trees, Env<AttrContext> env) {
448 for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail)
449 memberEnter(l.head, env);
450 }
452 /** Enter members for a class.
453 */
454 void finishClass(JCClassDecl tree, Env<AttrContext> env) {
455 if ((tree.mods.flags & Flags.ENUM) != 0 &&
456 (types.supertype(tree.sym.type).tsym.flags() & Flags.ENUM) == 0) {
457 addEnumMembers(tree, env);
458 }
459 memberEnter(tree.defs, env);
460 }
462 /** Add the implicit members for an enum type
463 * to the symbol table.
464 */
465 private void addEnumMembers(JCClassDecl tree, Env<AttrContext> env) {
466 JCExpression valuesType = make.Type(new ArrayType(tree.sym.type, syms.arrayClass));
468 // public static T[] values() { return ???; }
469 JCMethodDecl values = make.
470 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
471 names.values,
472 valuesType,
473 List.<JCTypeParameter>nil(),
474 List.<JCVariableDecl>nil(),
475 List.<JCExpression>nil(), // thrown
476 null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
477 null);
478 memberEnter(values, env);
480 // public static T valueOf(String name) { return ???; }
481 JCMethodDecl valueOf = make.
482 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
483 names.valueOf,
484 make.Type(tree.sym.type),
485 List.<JCTypeParameter>nil(),
486 List.of(make.VarDef(make.Modifiers(Flags.PARAMETER |
487 Flags.MANDATED),
488 names.fromString("name"),
489 make.Type(syms.stringType), null)),
490 List.<JCExpression>nil(), // thrown
491 null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
492 null);
493 memberEnter(valueOf, env);
494 }
496 public void visitTopLevel(JCCompilationUnit tree) {
497 if (tree.starImportScope.elems != null) {
498 // we must have already processed this toplevel
499 return;
500 }
502 // check that no class exists with same fully qualified name as
503 // toplevel package
504 if (checkClash && tree.pid != null) {
505 Symbol p = tree.packge;
506 while (p.owner != syms.rootPackage) {
507 p.owner.complete(); // enter all class members of p
508 if (syms.classes.get(p.getQualifiedName()) != null) {
509 log.error(tree.pos,
510 "pkg.clashes.with.class.of.same.name",
511 p);
512 }
513 p = p.owner;
514 }
515 }
517 // process package annotations
518 annotateLater(tree.packageAnnotations, env, tree.packge, null);
520 DiagnosticPosition prevLintPos = deferredLintHandler.immediate();
521 Lint prevLint = chk.setLint(lint);
523 try {
524 // Import-on-demand java.lang.
525 importAll(tree.pos, reader.enterPackage(names.java_lang), env);
527 // Process all import clauses.
528 memberEnter(tree.defs, env);
529 } finally {
530 chk.setLint(prevLint);
531 deferredLintHandler.setPos(prevLintPos);
532 }
533 }
535 // process the non-static imports and the static imports of types.
536 public void visitImport(JCImport tree) {
537 JCFieldAccess imp = (JCFieldAccess)tree.qualid;
538 Name name = TreeInfo.name(imp);
540 // Create a local environment pointing to this tree to disable
541 // effects of other imports in Resolve.findGlobalType
542 Env<AttrContext> localEnv = env.dup(tree);
544 TypeSymbol p = attr.attribImportQualifier(tree, localEnv).tsym;
545 if (name == names.asterisk) {
546 // Import on demand.
547 chk.checkCanonical(imp.selected);
548 if (tree.staticImport)
549 importStaticAll(tree.pos, p, env);
550 else
551 importAll(tree.pos, p, env);
552 } else {
553 // Named type import.
554 if (tree.staticImport) {
555 importNamedStatic(tree.pos(), p, name, localEnv);
556 chk.checkCanonical(imp.selected);
557 } else {
558 TypeSymbol c = attribImportType(imp, localEnv).tsym;
559 chk.checkCanonical(imp);
560 importNamed(tree.pos(), c, env);
561 }
562 }
563 }
565 public void visitMethodDef(JCMethodDecl tree) {
566 Scope enclScope = enter.enterScope(env);
567 MethodSymbol m = new MethodSymbol(0, tree.name, null, enclScope.owner);
568 m.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, m, tree);
569 tree.sym = m;
571 //if this is a default method, add the DEFAULT flag to the enclosing interface
572 if ((tree.mods.flags & DEFAULT) != 0) {
573 m.enclClass().flags_field |= DEFAULT;
574 }
576 Env<AttrContext> localEnv = methodEnv(tree, env);
578 annotate.enterStart();
579 try {
580 DiagnosticPosition prevLintPos = deferredLintHandler.setPos(tree.pos());
581 try {
582 // Compute the method type
583 m.type = signature(m, tree.typarams, tree.params,
584 tree.restype, tree.recvparam,
585 tree.thrown,
586 localEnv);
587 } finally {
588 deferredLintHandler.setPos(prevLintPos);
589 }
591 if (types.isSignaturePolymorphic(m)) {
592 m.flags_field |= SIGNATURE_POLYMORPHIC;
593 }
595 // Set m.params
596 ListBuffer<VarSymbol> params = new ListBuffer<VarSymbol>();
597 JCVariableDecl lastParam = null;
598 for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) {
599 JCVariableDecl param = lastParam = l.head;
600 params.append(Assert.checkNonNull(param.sym));
601 }
602 m.params = params.toList();
604 // mark the method varargs, if necessary
605 if (lastParam != null && (lastParam.mods.flags & Flags.VARARGS) != 0)
606 m.flags_field |= Flags.VARARGS;
608 localEnv.info.scope.leave();
609 if (chk.checkUnique(tree.pos(), m, enclScope)) {
610 enclScope.enter(m);
611 }
613 annotateLater(tree.mods.annotations, localEnv, m, tree.pos());
614 // Visit the signature of the method. Note that
615 // TypeAnnotate doesn't descend into the body.
616 typeAnnotate(tree, localEnv, m, tree.pos());
618 if (tree.defaultValue != null)
619 annotateDefaultValueLater(tree.defaultValue, localEnv, m);
620 } finally {
621 annotate.enterDone();
622 }
623 }
625 /** Create a fresh environment for method bodies.
626 * @param tree The method definition.
627 * @param env The environment current outside of the method definition.
628 */
629 Env<AttrContext> methodEnv(JCMethodDecl tree, Env<AttrContext> env) {
630 Env<AttrContext> localEnv =
631 env.dup(tree, env.info.dup(env.info.scope.dupUnshared()));
632 localEnv.enclMethod = tree;
633 localEnv.info.scope.owner = tree.sym;
634 if (tree.sym.type != null) {
635 //when this is called in the enter stage, there's no type to be set
636 localEnv.info.returnResult = attr.new ResultInfo(VAL, tree.sym.type.getReturnType());
637 }
638 if ((tree.mods.flags & STATIC) != 0) localEnv.info.staticLevel++;
639 return localEnv;
640 }
642 public void visitVarDef(JCVariableDecl tree) {
643 Env<AttrContext> localEnv = env;
644 if ((tree.mods.flags & STATIC) != 0 ||
645 (env.info.scope.owner.flags() & INTERFACE) != 0) {
646 localEnv = env.dup(tree, env.info.dup());
647 localEnv.info.staticLevel++;
648 }
649 DiagnosticPosition prevLintPos = deferredLintHandler.setPos(tree.pos());
650 annotate.enterStart();
651 try {
652 try {
653 if (TreeInfo.isEnumInit(tree)) {
654 attr.attribIdentAsEnumType(localEnv, (JCIdent)tree.vartype);
655 } else {
656 attr.attribType(tree.vartype, localEnv);
657 if (TreeInfo.isReceiverParam(tree))
658 checkReceiver(tree, localEnv);
659 }
660 } finally {
661 deferredLintHandler.setPos(prevLintPos);
662 }
664 if ((tree.mods.flags & VARARGS) != 0) {
665 //if we are entering a varargs parameter, we need to
666 //replace its type (a plain array type) with the more
667 //precise VarargsType --- we need to do it this way
668 //because varargs is represented in the tree as a
669 //modifier on the parameter declaration, and not as a
670 //distinct type of array node.
671 ArrayType atype = (ArrayType)tree.vartype.type.unannotatedType();
672 tree.vartype.type = atype.makeVarargs();
673 }
674 Scope enclScope = enter.enterScope(env);
675 VarSymbol v =
676 new VarSymbol(0, tree.name, tree.vartype.type, enclScope.owner);
677 v.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, v, tree);
678 tree.sym = v;
679 if (tree.init != null) {
680 v.flags_field |= HASINIT;
681 if ((v.flags_field & FINAL) != 0 &&
682 needsLazyConstValue(tree.init)) {
683 Env<AttrContext> initEnv = getInitEnv(tree, env);
684 initEnv.info.enclVar = v;
685 v.setLazyConstValue(initEnv(tree, initEnv), attr, tree);
686 }
687 }
688 if (chk.checkUnique(tree.pos(), v, enclScope)) {
689 chk.checkTransparentVar(tree.pos(), v, enclScope);
690 enclScope.enter(v);
691 }
692 annotateLater(tree.mods.annotations, localEnv, v, tree.pos());
693 typeAnnotate(tree.vartype, env, v, tree.pos());
694 v.pos = tree.pos;
695 } finally {
696 annotate.enterDone();
697 }
698 }
699 // where
700 void checkType(JCTree tree, Type type, String diag) {
701 if (!tree.type.isErroneous() && !types.isSameType(tree.type, type)) {
702 log.error(tree, diag, type, tree.type);
703 }
704 }
705 void checkReceiver(JCVariableDecl tree, Env<AttrContext> localEnv) {
706 attr.attribExpr(tree.nameexpr, localEnv);
707 MethodSymbol m = localEnv.enclMethod.sym;
708 if (m.isConstructor()) {
709 Type outertype = m.owner.owner.type;
710 if (outertype.hasTag(TypeTag.METHOD)) {
711 // we have a local inner class
712 outertype = m.owner.owner.owner.type;
713 }
714 if (outertype.hasTag(TypeTag.CLASS)) {
715 checkType(tree.vartype, outertype, "incorrect.constructor.receiver.type");
716 checkType(tree.nameexpr, outertype, "incorrect.constructor.receiver.name");
717 } else {
718 log.error(tree, "receiver.parameter.not.applicable.constructor.toplevel.class");
719 }
720 } else {
721 checkType(tree.vartype, m.owner.type, "incorrect.receiver.type");
722 checkType(tree.nameexpr, m.owner.type, "incorrect.receiver.name");
723 }
724 }
726 public boolean needsLazyConstValue(JCTree tree) {
727 InitTreeVisitor initTreeVisitor = new InitTreeVisitor();
728 tree.accept(initTreeVisitor);
729 return initTreeVisitor.result;
730 }
732 /** Visitor class for expressions which might be constant expressions.
733 */
734 static class InitTreeVisitor extends JCTree.Visitor {
736 private boolean result = true;
738 @Override
739 public void visitTree(JCTree tree) {}
741 @Override
742 public void visitNewClass(JCNewClass that) {
743 result = false;
744 }
746 @Override
747 public void visitNewArray(JCNewArray that) {
748 result = false;
749 }
751 @Override
752 public void visitLambda(JCLambda that) {
753 result = false;
754 }
756 @Override
757 public void visitReference(JCMemberReference that) {
758 result = false;
759 }
761 @Override
762 public void visitApply(JCMethodInvocation that) {
763 result = false;
764 }
766 @Override
767 public void visitSelect(JCFieldAccess tree) {
768 tree.selected.accept(this);
769 }
771 @Override
772 public void visitConditional(JCConditional tree) {
773 tree.cond.accept(this);
774 tree.truepart.accept(this);
775 tree.falsepart.accept(this);
776 }
778 @Override
779 public void visitParens(JCParens tree) {
780 tree.expr.accept(this);
781 }
783 @Override
784 public void visitTypeCast(JCTypeCast tree) {
785 tree.expr.accept(this);
786 }
787 }
789 /** Create a fresh environment for a variable's initializer.
790 * If the variable is a field, the owner of the environment's scope
791 * is be the variable itself, otherwise the owner is the method
792 * enclosing the variable definition.
793 *
794 * @param tree The variable definition.
795 * @param env The environment current outside of the variable definition.
796 */
797 Env<AttrContext> initEnv(JCVariableDecl tree, Env<AttrContext> env) {
798 Env<AttrContext> localEnv = env.dupto(new AttrContextEnv(tree, env.info.dup()));
799 if (tree.sym.owner.kind == TYP) {
800 localEnv.info.scope = env.info.scope.dupUnshared();
801 localEnv.info.scope.owner = tree.sym;
802 }
803 if ((tree.mods.flags & STATIC) != 0 ||
804 ((env.enclClass.sym.flags() & INTERFACE) != 0 && env.enclMethod == null))
805 localEnv.info.staticLevel++;
806 return localEnv;
807 }
809 /** Default member enter visitor method: do nothing
810 */
811 public void visitTree(JCTree tree) {
812 }
814 public void visitErroneous(JCErroneous tree) {
815 if (tree.errs != null)
816 memberEnter(tree.errs, env);
817 }
819 public Env<AttrContext> getMethodEnv(JCMethodDecl tree, Env<AttrContext> env) {
820 Env<AttrContext> mEnv = methodEnv(tree, env);
821 mEnv.info.lint = mEnv.info.lint.augment(tree.sym);
822 for (List<JCTypeParameter> l = tree.typarams; l.nonEmpty(); l = l.tail)
823 mEnv.info.scope.enterIfAbsent(l.head.type.tsym);
824 for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail)
825 mEnv.info.scope.enterIfAbsent(l.head.sym);
826 return mEnv;
827 }
829 public Env<AttrContext> getInitEnv(JCVariableDecl tree, Env<AttrContext> env) {
830 Env<AttrContext> iEnv = initEnv(tree, env);
831 return iEnv;
832 }
834 /* ********************************************************************
835 * Type completion
836 *********************************************************************/
838 Type attribImportType(JCTree tree, Env<AttrContext> env) {
839 Assert.check(completionEnabled);
840 try {
841 // To prevent deep recursion, suppress completion of some
842 // types.
843 completionEnabled = false;
844 return attr.attribType(tree, env);
845 } finally {
846 completionEnabled = true;
847 }
848 }
850 /* ********************************************************************
851 * Annotation processing
852 *********************************************************************/
854 /** Queue annotations for later processing. */
855 void annotateLater(final List<JCAnnotation> annotations,
856 final Env<AttrContext> localEnv,
857 final Symbol s,
858 final DiagnosticPosition deferPos) {
859 if (annotations.isEmpty()) {
860 return;
861 }
862 if (s.kind != PCK) {
863 s.resetAnnotations(); // mark Annotations as incomplete for now
864 }
865 annotate.normal(new Annotate.Worker() {
866 @Override
867 public String toString() {
868 return "annotate " + annotations + " onto " + s + " in " + s.owner;
869 }
871 @Override
872 public void run() {
873 Assert.check(s.kind == PCK || s.annotationsPendingCompletion());
874 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
875 DiagnosticPosition prevLintPos =
876 deferPos != null
877 ? deferredLintHandler.setPos(deferPos)
878 : deferredLintHandler.immediate();
879 Lint prevLint = deferPos != null ? null : chk.setLint(lint);
880 try {
881 if (s.hasAnnotations() &&
882 annotations.nonEmpty())
883 log.error(annotations.head.pos,
884 "already.annotated",
885 kindName(s), s);
886 actualEnterAnnotations(annotations, localEnv, s);
887 } finally {
888 if (prevLint != null)
889 chk.setLint(prevLint);
890 deferredLintHandler.setPos(prevLintPos);
891 log.useSource(prev);
892 }
893 }
894 });
896 annotate.validate(new Annotate.Worker() { //validate annotations
897 @Override
898 public void run() {
899 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
900 try {
901 chk.validateAnnotations(annotations, s);
902 } finally {
903 log.useSource(prev);
904 }
905 }
906 });
907 }
909 /**
910 * Check if a list of annotations contains a reference to
911 * java.lang.Deprecated.
912 **/
913 private boolean hasDeprecatedAnnotation(List<JCAnnotation> annotations) {
914 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
915 JCAnnotation a = al.head;
916 if (a.annotationType.type == syms.deprecatedType && a.args.isEmpty())
917 return true;
918 }
919 return false;
920 }
922 /** Enter a set of annotations. */
923 private void actualEnterAnnotations(List<JCAnnotation> annotations,
924 Env<AttrContext> env,
925 Symbol s) {
926 Map<TypeSymbol, ListBuffer<Attribute.Compound>> annotated =
927 new LinkedHashMap<TypeSymbol, ListBuffer<Attribute.Compound>>();
928 Map<Attribute.Compound, DiagnosticPosition> pos =
929 new HashMap<Attribute.Compound, DiagnosticPosition>();
931 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
932 JCAnnotation a = al.head;
933 Attribute.Compound c = annotate.enterAnnotation(a,
934 syms.annotationType,
935 env);
936 if (c == null) {
937 continue;
938 }
940 if (annotated.containsKey(a.type.tsym)) {
941 if (!allowRepeatedAnnos) {
942 log.error(a.pos(), "repeatable.annotations.not.supported.in.source");
943 allowRepeatedAnnos = true;
944 }
945 ListBuffer<Attribute.Compound> l = annotated.get(a.type.tsym);
946 l = l.append(c);
947 annotated.put(a.type.tsym, l);
948 pos.put(c, a.pos());
949 } else {
950 annotated.put(a.type.tsym, ListBuffer.of(c));
951 pos.put(c, a.pos());
952 }
954 // Note: @Deprecated has no effect on local variables and parameters
955 if (!c.type.isErroneous()
956 && s.owner.kind != MTH
957 && types.isSameType(c.type, syms.deprecatedType)) {
958 s.flags_field |= Flags.DEPRECATED;
959 }
960 }
962 s.setDeclarationAttributesWithCompletion(
963 annotate.new AnnotateRepeatedContext<Attribute.Compound>(env, annotated, pos, log, false));
964 }
966 /** Queue processing of an attribute default value. */
967 void annotateDefaultValueLater(final JCExpression defaultValue,
968 final Env<AttrContext> localEnv,
969 final MethodSymbol m) {
970 annotate.normal(new Annotate.Worker() {
971 @Override
972 public String toString() {
973 return "annotate " + m.owner + "." +
974 m + " default " + defaultValue;
975 }
977 @Override
978 public void run() {
979 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
980 try {
981 enterDefaultValue(defaultValue, localEnv, m);
982 } finally {
983 log.useSource(prev);
984 }
985 }
986 });
987 annotate.validate(new Annotate.Worker() { //validate annotations
988 @Override
989 public void run() {
990 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
991 try {
992 // if default value is an annotation, check it is a well-formed
993 // annotation value (e.g. no duplicate values, no missing values, etc.)
994 chk.validateAnnotationTree(defaultValue);
995 } finally {
996 log.useSource(prev);
997 }
998 }
999 });
1000 }
1002 /** Enter a default value for an attribute method. */
1003 private void enterDefaultValue(final JCExpression defaultValue,
1004 final Env<AttrContext> localEnv,
1005 final MethodSymbol m) {
1006 m.defaultValue = annotate.enterAttributeValue(m.type.getReturnType(),
1007 defaultValue,
1008 localEnv);
1009 }
1011 /* ********************************************************************
1012 * Source completer
1013 *********************************************************************/
1015 /** Complete entering a class.
1016 * @param sym The symbol of the class to be completed.
1017 */
1018 public void complete(Symbol sym) throws CompletionFailure {
1019 // Suppress some (recursive) MemberEnter invocations
1020 if (!completionEnabled) {
1021 // Re-install same completer for next time around and return.
1022 Assert.check((sym.flags() & Flags.COMPOUND) == 0);
1023 sym.completer = this;
1024 return;
1025 }
1027 ClassSymbol c = (ClassSymbol)sym;
1028 ClassType ct = (ClassType)c.type;
1029 Env<AttrContext> env = typeEnvs.get(c);
1030 JCClassDecl tree = (JCClassDecl)env.tree;
1031 boolean wasFirst = isFirst;
1032 isFirst = false;
1034 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
1035 DiagnosticPosition prevLintPos = deferredLintHandler.setPos(tree.pos());
1036 try {
1037 // Save class environment for later member enter (2) processing.
1038 halfcompleted.append(env);
1040 // Mark class as not yet attributed.
1041 c.flags_field |= UNATTRIBUTED;
1043 // If this is a toplevel-class, make sure any preceding import
1044 // clauses have been seen.
1045 if (c.owner.kind == PCK) {
1046 memberEnter(env.toplevel, env.enclosing(TOPLEVEL));
1047 todo.append(env);
1048 }
1050 if (c.owner.kind == TYP)
1051 c.owner.complete();
1053 // create an environment for evaluating the base clauses
1054 Env<AttrContext> baseEnv = baseEnv(tree, env);
1056 if (tree.extending != null)
1057 typeAnnotate(tree.extending, baseEnv, sym, tree.pos());
1058 for (JCExpression impl : tree.implementing)
1059 typeAnnotate(impl, baseEnv, sym, tree.pos());
1060 annotate.flush();
1062 // Determine supertype.
1063 Type supertype =
1064 (tree.extending != null)
1065 ? attr.attribBase(tree.extending, baseEnv, true, false, true)
1066 : ((tree.mods.flags & Flags.ENUM) != 0)
1067 ? attr.attribBase(enumBase(tree.pos, c), baseEnv,
1068 true, false, false)
1069 : (c.fullname == names.java_lang_Object)
1070 ? Type.noType
1071 : syms.objectType;
1072 ct.supertype_field = modelMissingTypes(supertype, tree.extending, false);
1074 // Determine interfaces.
1075 ListBuffer<Type> interfaces = new ListBuffer<Type>();
1076 ListBuffer<Type> all_interfaces = null; // lazy init
1077 Set<Type> interfaceSet = new HashSet<Type>();
1078 List<JCExpression> interfaceTrees = tree.implementing;
1079 for (JCExpression iface : interfaceTrees) {
1080 Type i = attr.attribBase(iface, baseEnv, false, true, true);
1081 if (i.hasTag(CLASS)) {
1082 interfaces.append(i);
1083 if (all_interfaces != null) all_interfaces.append(i);
1084 chk.checkNotRepeated(iface.pos(), types.erasure(i), interfaceSet);
1085 } else {
1086 if (all_interfaces == null)
1087 all_interfaces = new ListBuffer<Type>().appendList(interfaces);
1088 all_interfaces.append(modelMissingTypes(i, iface, true));
1089 }
1090 }
1091 if ((c.flags_field & ANNOTATION) != 0) {
1092 ct.interfaces_field = List.of(syms.annotationType);
1093 ct.all_interfaces_field = ct.interfaces_field;
1094 } else {
1095 ct.interfaces_field = interfaces.toList();
1096 ct.all_interfaces_field = (all_interfaces == null)
1097 ? ct.interfaces_field : all_interfaces.toList();
1098 }
1100 if (c.fullname == names.java_lang_Object) {
1101 if (tree.extending != null) {
1102 chk.checkNonCyclic(tree.extending.pos(),
1103 supertype);
1104 ct.supertype_field = Type.noType;
1105 }
1106 else if (tree.implementing.nonEmpty()) {
1107 chk.checkNonCyclic(tree.implementing.head.pos(),
1108 ct.interfaces_field.head);
1109 ct.interfaces_field = List.nil();
1110 }
1111 }
1113 // Annotations.
1114 // In general, we cannot fully process annotations yet, but we
1115 // can attribute the annotation types and then check to see if the
1116 // @Deprecated annotation is present.
1117 attr.attribAnnotationTypes(tree.mods.annotations, baseEnv);
1118 if (hasDeprecatedAnnotation(tree.mods.annotations))
1119 c.flags_field |= DEPRECATED;
1120 annotateLater(tree.mods.annotations, baseEnv, c, tree.pos());
1121 // class type parameters use baseEnv but everything uses env
1123 chk.checkNonCyclicDecl(tree);
1125 attr.attribTypeVariables(tree.typarams, baseEnv);
1126 // Do this here, where we have the symbol.
1127 for (JCTypeParameter tp : tree.typarams)
1128 typeAnnotate(tp, baseEnv, sym, tree.pos());
1130 // Add default constructor if needed.
1131 if ((c.flags() & INTERFACE) == 0 &&
1132 !TreeInfo.hasConstructors(tree.defs)) {
1133 List<Type> argtypes = List.nil();
1134 List<Type> typarams = List.nil();
1135 List<Type> thrown = List.nil();
1136 long ctorFlags = 0;
1137 boolean based = false;
1138 boolean addConstructor = true;
1139 JCNewClass nc = null;
1140 if (c.name.isEmpty()) {
1141 nc = (JCNewClass)env.next.tree;
1142 if (nc.constructor != null) {
1143 addConstructor = nc.constructor.kind != ERR;
1144 Type superConstrType = types.memberType(c.type,
1145 nc.constructor);
1146 argtypes = superConstrType.getParameterTypes();
1147 typarams = superConstrType.getTypeArguments();
1148 ctorFlags = nc.constructor.flags() & VARARGS;
1149 if (nc.encl != null) {
1150 argtypes = argtypes.prepend(nc.encl.type);
1151 based = true;
1152 }
1153 thrown = superConstrType.getThrownTypes();
1154 }
1155 }
1156 if (addConstructor) {
1157 MethodSymbol basedConstructor = nc != null ?
1158 (MethodSymbol)nc.constructor : null;
1159 JCTree constrDef = DefaultConstructor(make.at(tree.pos), c,
1160 basedConstructor,
1161 typarams, argtypes, thrown,
1162 ctorFlags, based);
1163 tree.defs = tree.defs.prepend(constrDef);
1164 }
1165 }
1167 // enter symbols for 'this' into current scope.
1168 VarSymbol thisSym =
1169 new VarSymbol(FINAL | HASINIT, names._this, c.type, c);
1170 thisSym.pos = Position.FIRSTPOS;
1171 env.info.scope.enter(thisSym);
1172 // if this is a class, enter symbol for 'super' into current scope.
1173 if ((c.flags_field & INTERFACE) == 0 &&
1174 ct.supertype_field.hasTag(CLASS)) {
1175 VarSymbol superSym =
1176 new VarSymbol(FINAL | HASINIT, names._super,
1177 ct.supertype_field, c);
1178 superSym.pos = Position.FIRSTPOS;
1179 env.info.scope.enter(superSym);
1180 }
1182 // check that no package exists with same fully qualified name,
1183 // but admit classes in the unnamed package which have the same
1184 // name as a top-level package.
1185 if (checkClash &&
1186 c.owner.kind == PCK && c.owner != syms.unnamedPackage &&
1187 reader.packageExists(c.fullname)) {
1188 log.error(tree.pos, "clash.with.pkg.of.same.name", Kinds.kindName(sym), c);
1189 }
1190 if (c.owner.kind == PCK && (c.flags_field & PUBLIC) == 0 &&
1191 !env.toplevel.sourcefile.isNameCompatible(c.name.toString(),JavaFileObject.Kind.SOURCE)) {
1192 c.flags_field |= AUXILIARY;
1193 }
1194 } catch (CompletionFailure ex) {
1195 chk.completionError(tree.pos(), ex);
1196 } finally {
1197 deferredLintHandler.setPos(prevLintPos);
1198 log.useSource(prev);
1199 }
1201 // Enter all member fields and methods of a set of half completed
1202 // classes in a second phase.
1203 if (wasFirst) {
1204 try {
1205 while (halfcompleted.nonEmpty()) {
1206 Env<AttrContext> toFinish = halfcompleted.next();
1207 finish(toFinish);
1208 if (allowTypeAnnos) {
1209 typeAnnotations.organizeTypeAnnotationsSignatures(toFinish, (JCClassDecl)toFinish.tree);
1210 typeAnnotations.validateTypeAnnotationsSignatures(toFinish, (JCClassDecl)toFinish.tree);
1211 }
1212 }
1213 } finally {
1214 isFirst = true;
1215 }
1216 }
1217 }
1219 /*
1220 * If the symbol is non-null, attach the type annotation to it.
1221 */
1222 private void actualEnterTypeAnnotations(final List<JCAnnotation> annotations,
1223 final Env<AttrContext> env,
1224 final Symbol s) {
1225 Map<TypeSymbol, ListBuffer<Attribute.TypeCompound>> annotated =
1226 new LinkedHashMap<TypeSymbol, ListBuffer<Attribute.TypeCompound>>();
1227 Map<Attribute.TypeCompound, DiagnosticPosition> pos =
1228 new HashMap<Attribute.TypeCompound, DiagnosticPosition>();
1230 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
1231 JCAnnotation a = al.head;
1232 Attribute.TypeCompound tc = annotate.enterTypeAnnotation(a,
1233 syms.annotationType,
1234 env);
1235 if (tc == null) {
1236 continue;
1237 }
1239 if (annotated.containsKey(a.type.tsym)) {
1240 if (source.allowRepeatedAnnotations()) {
1241 ListBuffer<Attribute.TypeCompound> l = annotated.get(a.type.tsym);
1242 l = l.append(tc);
1243 annotated.put(a.type.tsym, l);
1244 pos.put(tc, a.pos());
1245 } else {
1246 log.error(a.pos(), "repeatable.annotations.not.supported.in.source");
1247 }
1248 } else {
1249 annotated.put(a.type.tsym, ListBuffer.of(tc));
1250 pos.put(tc, a.pos());
1251 }
1252 }
1254 if (s != null) {
1255 s.appendTypeAttributesWithCompletion(
1256 annotate.new AnnotateRepeatedContext<Attribute.TypeCompound>(env, annotated, pos, log, true));
1257 }
1258 }
1260 public void typeAnnotate(final JCTree tree, final Env<AttrContext> env, final Symbol sym, DiagnosticPosition deferPos) {
1261 if (allowTypeAnnos) {
1262 tree.accept(new TypeAnnotate(env, sym, deferPos));
1263 }
1264 }
1266 /**
1267 * We need to use a TreeScanner, because it is not enough to visit the top-level
1268 * annotations. We also need to visit type arguments, etc.
1269 */
1270 private class TypeAnnotate extends TreeScanner {
1271 private Env<AttrContext> env;
1272 private Symbol sym;
1273 private DiagnosticPosition deferPos;
1275 public TypeAnnotate(final Env<AttrContext> env, final Symbol sym, DiagnosticPosition deferPos) {
1276 this.env = env;
1277 this.sym = sym;
1278 this.deferPos = deferPos;
1279 }
1281 void annotateTypeLater(final List<JCAnnotation> annotations) {
1282 if (annotations.isEmpty()) {
1283 return;
1284 }
1286 final DiagnosticPosition deferPos = this.deferPos;
1288 annotate.normal(new Annotate.Worker() {
1289 @Override
1290 public String toString() {
1291 return "type annotate " + annotations + " onto " + sym + " in " + sym.owner;
1292 }
1293 @Override
1294 public void run() {
1295 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
1296 DiagnosticPosition prevLintPos = null;
1298 if (deferPos != null) {
1299 prevLintPos = deferredLintHandler.setPos(deferPos);
1300 }
1301 try {
1302 actualEnterTypeAnnotations(annotations, env, sym);
1303 } finally {
1304 if (prevLintPos != null)
1305 deferredLintHandler.setPos(prevLintPos);
1306 log.useSource(prev);
1307 }
1308 }
1309 });
1310 }
1312 @Override
1313 public void visitAnnotatedType(final JCAnnotatedType tree) {
1314 annotateTypeLater(tree.annotations);
1315 super.visitAnnotatedType(tree);
1316 }
1318 @Override
1319 public void visitTypeParameter(final JCTypeParameter tree) {
1320 annotateTypeLater(tree.annotations);
1321 super.visitTypeParameter(tree);
1322 }
1324 @Override
1325 public void visitNewArray(final JCNewArray tree) {
1326 annotateTypeLater(tree.annotations);
1327 for (List<JCAnnotation> dimAnnos : tree.dimAnnotations)
1328 annotateTypeLater(dimAnnos);
1329 super.visitNewArray(tree);
1330 }
1332 @Override
1333 public void visitMethodDef(final JCMethodDecl tree) {
1334 scan(tree.mods);
1335 scan(tree.restype);
1336 scan(tree.typarams);
1337 scan(tree.recvparam);
1338 scan(tree.params);
1339 scan(tree.thrown);
1340 scan(tree.defaultValue);
1341 // Do not annotate the body, just the signature.
1342 // scan(tree.body);
1343 }
1345 @Override
1346 public void visitVarDef(final JCVariableDecl tree) {
1347 DiagnosticPosition prevPos = deferPos;
1348 deferPos = tree.pos();
1349 try {
1350 if (sym != null && sym.kind == Kinds.VAR) {
1351 // Don't visit a parameter once when the sym is the method
1352 // and once when the sym is the parameter.
1353 scan(tree.mods);
1354 scan(tree.vartype);
1355 }
1356 scan(tree.init);
1357 } finally {
1358 deferPos = prevPos;
1359 }
1360 }
1362 @Override
1363 public void visitClassDef(JCClassDecl tree) {
1364 // We can only hit a classdef if it is declared within
1365 // a method. Ignore it - the class will be visited
1366 // separately later.
1367 }
1369 @Override
1370 public void visitNewClass(JCNewClass tree) {
1371 if (tree.def == null) {
1372 // For an anonymous class instantiation the class
1373 // will be visited separately.
1374 super.visitNewClass(tree);
1375 }
1376 }
1377 }
1380 private Env<AttrContext> baseEnv(JCClassDecl tree, Env<AttrContext> env) {
1381 Scope baseScope = new Scope(tree.sym);
1382 //import already entered local classes into base scope
1383 for (Scope.Entry e = env.outer.info.scope.elems ; e != null ; e = e.sibling) {
1384 if (e.sym.isLocal()) {
1385 baseScope.enter(e.sym);
1386 }
1387 }
1388 //import current type-parameters into base scope
1389 if (tree.typarams != null)
1390 for (List<JCTypeParameter> typarams = tree.typarams;
1391 typarams.nonEmpty();
1392 typarams = typarams.tail)
1393 baseScope.enter(typarams.head.type.tsym);
1394 Env<AttrContext> outer = env.outer; // the base clause can't see members of this class
1395 Env<AttrContext> localEnv = outer.dup(tree, outer.info.dup(baseScope));
1396 localEnv.baseClause = true;
1397 localEnv.outer = outer;
1398 localEnv.info.isSelfCall = false;
1399 return localEnv;
1400 }
1402 /** Enter member fields and methods of a class
1403 * @param env the environment current for the class block.
1404 */
1405 private void finish(Env<AttrContext> env) {
1406 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
1407 try {
1408 JCClassDecl tree = (JCClassDecl)env.tree;
1409 finishClass(tree, env);
1410 } finally {
1411 log.useSource(prev);
1412 }
1413 }
1415 /** Generate a base clause for an enum type.
1416 * @param pos The position for trees and diagnostics, if any
1417 * @param c The class symbol of the enum
1418 */
1419 private JCExpression enumBase(int pos, ClassSymbol c) {
1420 JCExpression result = make.at(pos).
1421 TypeApply(make.QualIdent(syms.enumSym),
1422 List.<JCExpression>of(make.Type(c.type)));
1423 return result;
1424 }
1426 Type modelMissingTypes(Type t, final JCExpression tree, final boolean interfaceExpected) {
1427 if (!t.hasTag(ERROR))
1428 return t;
1430 return new ErrorType(t.getOriginalType(), t.tsym) {
1431 private Type modelType;
1433 @Override
1434 public Type getModelType() {
1435 if (modelType == null)
1436 modelType = new Synthesizer(getOriginalType(), interfaceExpected).visit(tree);
1437 return modelType;
1438 }
1439 };
1440 }
1441 // where
1442 private class Synthesizer extends JCTree.Visitor {
1443 Type originalType;
1444 boolean interfaceExpected;
1445 List<ClassSymbol> synthesizedSymbols = List.nil();
1446 Type result;
1448 Synthesizer(Type originalType, boolean interfaceExpected) {
1449 this.originalType = originalType;
1450 this.interfaceExpected = interfaceExpected;
1451 }
1453 Type visit(JCTree tree) {
1454 tree.accept(this);
1455 return result;
1456 }
1458 List<Type> visit(List<? extends JCTree> trees) {
1459 ListBuffer<Type> lb = new ListBuffer<Type>();
1460 for (JCTree t: trees)
1461 lb.append(visit(t));
1462 return lb.toList();
1463 }
1465 @Override
1466 public void visitTree(JCTree tree) {
1467 result = syms.errType;
1468 }
1470 @Override
1471 public void visitIdent(JCIdent tree) {
1472 if (!tree.type.hasTag(ERROR)) {
1473 result = tree.type;
1474 } else {
1475 result = synthesizeClass(tree.name, syms.unnamedPackage).type;
1476 }
1477 }
1479 @Override
1480 public void visitSelect(JCFieldAccess tree) {
1481 if (!tree.type.hasTag(ERROR)) {
1482 result = tree.type;
1483 } else {
1484 Type selectedType;
1485 boolean prev = interfaceExpected;
1486 try {
1487 interfaceExpected = false;
1488 selectedType = visit(tree.selected);
1489 } finally {
1490 interfaceExpected = prev;
1491 }
1492 ClassSymbol c = synthesizeClass(tree.name, selectedType.tsym);
1493 result = c.type;
1494 }
1495 }
1497 @Override
1498 public void visitTypeApply(JCTypeApply tree) {
1499 if (!tree.type.hasTag(ERROR)) {
1500 result = tree.type;
1501 } else {
1502 ClassType clazzType = (ClassType) visit(tree.clazz);
1503 if (synthesizedSymbols.contains(clazzType.tsym))
1504 synthesizeTyparams((ClassSymbol) clazzType.tsym, tree.arguments.size());
1505 final List<Type> actuals = visit(tree.arguments);
1506 result = new ErrorType(tree.type, clazzType.tsym) {
1507 @Override
1508 public List<Type> getTypeArguments() {
1509 return actuals;
1510 }
1511 };
1512 }
1513 }
1515 ClassSymbol synthesizeClass(Name name, Symbol owner) {
1516 int flags = interfaceExpected ? INTERFACE : 0;
1517 ClassSymbol c = new ClassSymbol(flags, name, owner);
1518 c.members_field = new Scope.ErrorScope(c);
1519 c.type = new ErrorType(originalType, c) {
1520 @Override
1521 public List<Type> getTypeArguments() {
1522 return typarams_field;
1523 }
1524 };
1525 synthesizedSymbols = synthesizedSymbols.prepend(c);
1526 return c;
1527 }
1529 void synthesizeTyparams(ClassSymbol sym, int n) {
1530 ClassType ct = (ClassType) sym.type;
1531 Assert.check(ct.typarams_field.isEmpty());
1532 if (n == 1) {
1533 TypeVar v = new TypeVar(names.fromString("T"), sym, syms.botType);
1534 ct.typarams_field = ct.typarams_field.prepend(v);
1535 } else {
1536 for (int i = n; i > 0; i--) {
1537 TypeVar v = new TypeVar(names.fromString("T" + i), sym, syms.botType);
1538 ct.typarams_field = ct.typarams_field.prepend(v);
1539 }
1540 }
1541 }
1542 }
1545 /* ***************************************************************************
1546 * tree building
1547 ****************************************************************************/
1549 /** Generate default constructor for given class. For classes different
1550 * from java.lang.Object, this is:
1551 *
1552 * c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
1553 * super(x_0, ..., x_n)
1554 * }
1555 *
1556 * or, if based == true:
1557 *
1558 * c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
1559 * x_0.super(x_1, ..., x_n)
1560 * }
1561 *
1562 * @param make The tree factory.
1563 * @param c The class owning the default constructor.
1564 * @param argtypes The parameter types of the constructor.
1565 * @param thrown The thrown exceptions of the constructor.
1566 * @param based Is first parameter a this$n?
1567 */
1568 JCTree DefaultConstructor(TreeMaker make,
1569 ClassSymbol c,
1570 MethodSymbol baseInit,
1571 List<Type> typarams,
1572 List<Type> argtypes,
1573 List<Type> thrown,
1574 long flags,
1575 boolean based) {
1576 JCTree result;
1577 if ((c.flags() & ENUM) != 0 &&
1578 (types.supertype(c.type).tsym == syms.enumSym)) {
1579 // constructors of true enums are private
1580 flags = (flags & ~AccessFlags) | PRIVATE | GENERATEDCONSTR;
1581 } else
1582 flags |= (c.flags() & AccessFlags) | GENERATEDCONSTR;
1583 if (c.name.isEmpty()) {
1584 flags |= ANONCONSTR;
1585 }
1586 Type mType = new MethodType(argtypes, null, thrown, c);
1587 Type initType = typarams.nonEmpty() ?
1588 new ForAll(typarams, mType) :
1589 mType;
1590 MethodSymbol init = new MethodSymbol(flags, names.init,
1591 initType, c);
1592 init.params = createDefaultConstructorParams(make, baseInit, init,
1593 argtypes, based);
1594 List<JCVariableDecl> params = make.Params(argtypes, init);
1595 List<JCStatement> stats = List.nil();
1596 if (c.type != syms.objectType) {
1597 stats = stats.prepend(SuperCall(make, typarams, params, based));
1598 }
1599 result = make.MethodDef(init, make.Block(0, stats));
1600 return result;
1601 }
1603 private List<VarSymbol> createDefaultConstructorParams(
1604 TreeMaker make,
1605 MethodSymbol baseInit,
1606 MethodSymbol init,
1607 List<Type> argtypes,
1608 boolean based) {
1609 List<VarSymbol> initParams = null;
1610 List<Type> argTypesList = argtypes;
1611 if (based) {
1612 /* In this case argtypes will have an extra type, compared to baseInit,
1613 * corresponding to the type of the enclosing instance i.e.:
1614 *
1615 * Inner i = outer.new Inner(1){}
1616 *
1617 * in the above example argtypes will be (Outer, int) and baseInit
1618 * will have parameter's types (int). So in this case we have to add
1619 * first the extra type in argtypes and then get the names of the
1620 * parameters from baseInit.
1621 */
1622 initParams = List.nil();
1623 VarSymbol param = new VarSymbol(PARAMETER, make.paramName(0), argtypes.head, init);
1624 initParams = initParams.append(param);
1625 argTypesList = argTypesList.tail;
1626 }
1627 if (baseInit != null && baseInit.params != null &&
1628 baseInit.params.nonEmpty() && argTypesList.nonEmpty()) {
1629 initParams = (initParams == null) ? List.<VarSymbol>nil() : initParams;
1630 List<VarSymbol> baseInitParams = baseInit.params;
1631 while (baseInitParams.nonEmpty() && argTypesList.nonEmpty()) {
1632 VarSymbol param = new VarSymbol(baseInitParams.head.flags() | PARAMETER,
1633 baseInitParams.head.name, argTypesList.head, init);
1634 initParams = initParams.append(param);
1635 baseInitParams = baseInitParams.tail;
1636 argTypesList = argTypesList.tail;
1637 }
1638 }
1639 return initParams;
1640 }
1642 /** Generate call to superclass constructor. This is:
1643 *
1644 * super(id_0, ..., id_n)
1645 *
1646 * or, if based == true
1647 *
1648 * id_0.super(id_1,...,id_n)
1649 *
1650 * where id_0, ..., id_n are the names of the given parameters.
1651 *
1652 * @param make The tree factory
1653 * @param params The parameters that need to be passed to super
1654 * @param typarams The type parameters that need to be passed to super
1655 * @param based Is first parameter a this$n?
1656 */
1657 JCExpressionStatement SuperCall(TreeMaker make,
1658 List<Type> typarams,
1659 List<JCVariableDecl> params,
1660 boolean based) {
1661 JCExpression meth;
1662 if (based) {
1663 meth = make.Select(make.Ident(params.head), names._super);
1664 params = params.tail;
1665 } else {
1666 meth = make.Ident(names._super);
1667 }
1668 List<JCExpression> typeargs = typarams.nonEmpty() ? make.Types(typarams) : null;
1669 return make.Exec(make.Apply(typeargs, meth, make.Idents(params)));
1670 }
1671 }
