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 */
25
26 package com.sun.tools.javac.comp;
27
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;
33
34 import javax.lang.model.type.TypeKind;
35 import javax.tools.JavaFileObject;
36
37 import com.sun.tools.javac.code.*;
38 import com.sun.tools.javac.jvm.*;
39 import com.sun.tools.javac.tree.*;
40 import com.sun.tools.javac.util.*;
41
42 import com.sun.tools.javac.code.Type.*;
43 import com.sun.tools.javac.code.Symbol.*;
44 import com.sun.tools.javac.tree.JCTree.*;
45
46 import static com.sun.tools.javac.code.Flags.*;
47 import static com.sun.tools.javac.code.Flags.ANNOTATION;
48 import static com.sun.tools.javac.code.Kinds.*;
49 import static com.sun.tools.javac.code.TypeTag.CLASS;
50 import static com.sun.tools.javac.code.TypeTag.ERROR;
51 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
52 import static com.sun.tools.javac.tree.JCTree.Tag.*;
53 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;
54 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
55
56 /** This is the second phase of Enter, in which classes are completed
57 * by entering their members into the class scope using
58 * MemberEnter.complete(). See Enter for an overview.
59 *
60 * <p><b>This is NOT part of any supported API.
61 * If you write code that depends on this, you do so at your own risk.
62 * This code and its internal interfaces are subject to change or
63 * deletion without notice.</b>
64 */
65 public class MemberEnter extends JCTree.Visitor implements Completer {
66 protected static final Context.Key<MemberEnter> memberEnterKey =
67 new Context.Key<MemberEnter>();
68
69 /** A switch to determine whether we check for package/class conflicts
70 */
71 final static boolean checkClash = true;
72
73 private final Names names;
74 private final Enter enter;
75 private final Log log;
76 private final Check chk;
77 private final Attr attr;
78 private final Symtab syms;
79 private final TreeMaker make;
80 private final ClassReader reader;
81 private final Todo todo;
82 private final Annotate annotate;
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
89 public static MemberEnter instance(Context context) {
90 MemberEnter instance = context.get(memberEnterKey);
91 if (instance == null)
92 instance = new MemberEnter(context);
93 return instance;
94 }
95
96 protected MemberEnter(Context context) {
97 context.put(memberEnterKey, this);
98 names = Names.instance(context);
99 enter = Enter.instance(context);
100 log = Log.instance(context);
101 chk = Check.instance(context);
102 attr = Attr.instance(context);
103 syms = Symtab.instance(context);
104 make = TreeMaker.instance(context);
105 reader = ClassReader.instance(context);
106 todo = Todo.instance(context);
107 annotate = Annotate.instance(context);
108 types = Types.instance(context);
109 diags = JCDiagnostic.Factory.instance(context);
110 source = Source.instance(context);
111 target = Target.instance(context);
112 deferredLintHandler = DeferredLintHandler.instance(context);
113 }
114
115 /** A queue for classes whose members still need to be entered into the
116 * symbol table.
117 */
118 ListBuffer<Env<AttrContext>> halfcompleted = new ListBuffer<Env<AttrContext>>();
119
120 /** Set to true only when the first of a set of classes is
121 * processed from the halfcompleted queue.
122 */
123 boolean isFirst = true;
124
125 /** A flag to disable completion from time to time during member
126 * enter, as we only need to look up types. This avoids
127 * unnecessarily deep recursion.
128 */
129 boolean completionEnabled = true;
130
131 /* ---------- Processing import clauses ----------------
132 */
133
134 /** Import all classes of a class or package on demand.
135 * @param pos Position to be used for error reporting.
136 * @param tsym The class or package the members of which are imported.
137 * @param env The env in which the imported classes will be entered.
138 */
139 private void importAll(int pos,
140 final TypeSymbol tsym,
141 Env<AttrContext> env) {
142 // Check that packages imported from exist (JLS ???).
143 if (tsym.kind == PCK && tsym.members().elems == null && !tsym.exists()) {
144 // If we can't find java.lang, exit immediately.
145 if (((PackageSymbol)tsym).fullname.equals(names.java_lang)) {
146 JCDiagnostic msg = diags.fragment("fatal.err.no.java.lang");
147 throw new FatalError(msg);
148 } else {
149 log.error(DiagnosticFlag.RESOLVE_ERROR, pos, "doesnt.exist", tsym);
150 }
151 }
152 env.toplevel.starImportScope.importAll(tsym.members());
153 }
154
155 /** Import all static members of a class or package on demand.
156 * @param pos Position to be used for error reporting.
157 * @param tsym The class or package the members of which are imported.
158 * @param env The env in which the imported classes will be entered.
159 */
160 private void importStaticAll(int pos,
161 final TypeSymbol tsym,
162 Env<AttrContext> env) {
163 final JavaFileObject sourcefile = env.toplevel.sourcefile;
164 final Scope toScope = env.toplevel.starImportScope;
165 final PackageSymbol packge = env.toplevel.packge;
166 final TypeSymbol origin = tsym;
167
168 // enter imported types immediately
169 new Object() {
170 Set<Symbol> processed = new HashSet<Symbol>();
171 void importFrom(TypeSymbol tsym) {
172 if (tsym == null || !processed.add(tsym))
173 return;
174
175 // also import inherited names
176 importFrom(types.supertype(tsym.type).tsym);
177 for (Type t : types.interfaces(tsym.type))
178 importFrom(t.tsym);
179
180 final Scope fromScope = tsym.members();
181 for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
182 Symbol sym = e.sym;
183 if (sym.kind == TYP &&
184 (sym.flags() & STATIC) != 0 &&
185 staticImportAccessible(sym, packge) &&
186 sym.isMemberOf(origin, types) &&
187 !toScope.includes(sym))
188 toScope.enter(sym, fromScope, origin.members());
189 }
190 }
191 }.importFrom(tsym);
192
193 // enter non-types before annotations that might use them
194 annotate.earlier(new Annotate.Annotator() {
195 Set<Symbol> processed = new HashSet<Symbol>();
196
197 public String toString() {
198 return "import static " + tsym + ".*" + " in " + sourcefile;
199 }
200 void importFrom(TypeSymbol tsym) {
201 if (tsym == null || !processed.add(tsym))
202 return;
203
204 // also import inherited names
205 importFrom(types.supertype(tsym.type).tsym);
206 for (Type t : types.interfaces(tsym.type))
207 importFrom(t.tsym);
208
209 final Scope fromScope = tsym.members();
210 for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
211 Symbol sym = e.sym;
212 if (sym.isStatic() && sym.kind != TYP &&
213 staticImportAccessible(sym, packge) &&
214 !toScope.includes(sym) &&
215 sym.isMemberOf(origin, types)) {
216 toScope.enter(sym, fromScope, origin.members());
217 }
218 }
219 }
220 public void enterAnnotation() {
221 importFrom(tsym);
222 }
223 });
224 }
225
226 // is the sym accessible everywhere in packge?
227 boolean staticImportAccessible(Symbol sym, PackageSymbol packge) {
228 int flags = (int)(sym.flags() & AccessFlags);
229 switch (flags) {
230 default:
231 case PUBLIC:
232 return true;
233 case PRIVATE:
234 return false;
235 case 0:
236 case PROTECTED:
237 return sym.packge() == packge;
238 }
239 }
240
241 /** Import statics types of a given name. Non-types are handled in Attr.
242 * @param pos Position to be used for error reporting.
243 * @param tsym The class from which the name is imported.
244 * @param name The (simple) name being imported.
245 * @param env The environment containing the named import
246 * scope to add to.
247 */
248 private void importNamedStatic(final DiagnosticPosition pos,
249 final TypeSymbol tsym,
250 final Name name,
251 final Env<AttrContext> env) {
252 if (tsym.kind != TYP) {
253 log.error(DiagnosticFlag.RECOVERABLE, pos, "static.imp.only.classes.and.interfaces");
254 return;
255 }
256
257 final Scope toScope = env.toplevel.namedImportScope;
258 final PackageSymbol packge = env.toplevel.packge;
259 final TypeSymbol origin = tsym;
260
261 // enter imported types immediately
262 new Object() {
263 Set<Symbol> processed = new HashSet<Symbol>();
264 void importFrom(TypeSymbol tsym) {
265 if (tsym == null || !processed.add(tsym))
266 return;
267
268 // also import inherited names
269 importFrom(types.supertype(tsym.type).tsym);
270 for (Type t : types.interfaces(tsym.type))
271 importFrom(t.tsym);
272
273 for (Scope.Entry e = tsym.members().lookup(name);
274 e.scope != null;
275 e = e.next()) {
276 Symbol sym = e.sym;
277 if (sym.isStatic() &&
278 sym.kind == TYP &&
279 staticImportAccessible(sym, packge) &&
280 sym.isMemberOf(origin, types) &&
281 chk.checkUniqueStaticImport(pos, sym, toScope))
282 toScope.enter(sym, sym.owner.members(), origin.members());
283 }
284 }
285 }.importFrom(tsym);
286
287 // enter non-types before annotations that might use them
288 annotate.earlier(new Annotate.Annotator() {
289 Set<Symbol> processed = new HashSet<Symbol>();
290 boolean found = false;
291
292 public String toString() {
293 return "import static " + tsym + "." + name;
294 }
295 void importFrom(TypeSymbol tsym) {
296 if (tsym == null || !processed.add(tsym))
297 return;
298
299 // also import inherited names
300 importFrom(types.supertype(tsym.type).tsym);
301 for (Type t : types.interfaces(tsym.type))
302 importFrom(t.tsym);
303
304 for (Scope.Entry e = tsym.members().lookup(name);
305 e.scope != null;
306 e = e.next()) {
307 Symbol sym = e.sym;
308 if (sym.isStatic() &&
309 staticImportAccessible(sym, packge) &&
310 sym.isMemberOf(origin, types)) {
311 found = true;
312 if (sym.kind == MTH ||
313 sym.kind != TYP && chk.checkUniqueStaticImport(pos, sym, toScope))
314 toScope.enter(sym, sym.owner.members(), origin.members());
315 }
316 }
317 }
318 public void enterAnnotation() {
319 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
320 try {
321 importFrom(tsym);
322 if (!found) {
323 log.error(pos, "cant.resolve.location",
324 KindName.STATIC,
325 name, List.<Type>nil(), List.<Type>nil(),
326 Kinds.typeKindName(tsym.type),
327 tsym.type);
328 }
329 } finally {
330 log.useSource(prev);
331 }
332 }
333 });
334 }
335 /** Import given class.
336 * @param pos Position to be used for error reporting.
337 * @param tsym The class to be imported.
338 * @param env The environment containing the named import
339 * scope to add to.
340 */
341 private void importNamed(DiagnosticPosition pos, Symbol tsym, Env<AttrContext> env) {
342 if (tsym.kind == TYP &&
343 chk.checkUniqueImport(pos, tsym, env.toplevel.namedImportScope))
344 env.toplevel.namedImportScope.enter(tsym, tsym.owner.members());
345 }
346
347 /** Construct method type from method signature.
348 * @param typarams The method's type parameters.
349 * @param params The method's value parameters.
350 * @param res The method's result type,
351 * null if it is a constructor.
352 * @param recvparam The method's receiver parameter,
353 * null if none given; TODO: or already set here?
354 * @param thrown The method's thrown exceptions.
355 * @param env The method's (local) environment.
356 */
357 Type signature(List<JCTypeParameter> typarams,
358 List<JCVariableDecl> params,
359 JCTree res,
360 JCVariableDecl recvparam,
361 List<JCExpression> thrown,
362 Env<AttrContext> env) {
363
364 // Enter and attribute type parameters.
365 List<Type> tvars = enter.classEnter(typarams, env);
366 attr.attribTypeVariables(typarams, env);
367
368 // Enter and attribute value parameters.
369 ListBuffer<Type> argbuf = new ListBuffer<Type>();
370 for (List<JCVariableDecl> l = params; l.nonEmpty(); l = l.tail) {
371 memberEnter(l.head, env);
372 argbuf.append(l.head.vartype.type);
373 }
374
375 // Attribute result type, if one is given.
376 Type restype = res == null ? syms.voidType : attr.attribType(res, env);
377
378 // Attribute receiver type, if one is given.
379 Type recvtype;
380 if (recvparam!=null) {
381 memberEnter(recvparam, env);
382 recvtype = recvparam.vartype.type;
383 } else {
384 recvtype = null;
385 }
386
387 // Attribute thrown exceptions.
388 ListBuffer<Type> thrownbuf = new ListBuffer<Type>();
389 for (List<JCExpression> l = thrown; l.nonEmpty(); l = l.tail) {
390 Type exc = attr.attribType(l.head, env);
391 if (!exc.hasTag(TYPEVAR))
392 exc = chk.checkClassType(l.head.pos(), exc);
393 thrownbuf.append(exc);
394 }
395 MethodType mtype = new MethodType(argbuf.toList(),
396 restype,
397 thrownbuf.toList(),
398 syms.methodClass);
399 mtype.recvtype = recvtype;
400
401 return tvars.isEmpty() ? mtype : new ForAll(tvars, mtype);
402 }
403
404 /* ********************************************************************
405 * Visitor methods for member enter
406 *********************************************************************/
407
408 /** Visitor argument: the current environment
409 */
410 protected Env<AttrContext> env;
411
412 /** Enter field and method definitions and process import
413 * clauses, catching any completion failure exceptions.
414 */
415 protected void memberEnter(JCTree tree, Env<AttrContext> env) {
416 Env<AttrContext> prevEnv = this.env;
417 try {
418 this.env = env;
419 tree.accept(this);
420 } catch (CompletionFailure ex) {
421 chk.completionError(tree.pos(), ex);
422 } finally {
423 this.env = prevEnv;
424 }
425 }
426
427 /** Enter members from a list of trees.
428 */
429 void memberEnter(List<? extends JCTree> trees, Env<AttrContext> env) {
430 for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail)
431 memberEnter(l.head, env);
432 }
433
434 /** Enter members for a class.
435 */
436 void finishClass(JCClassDecl tree, Env<AttrContext> env) {
437 if ((tree.mods.flags & Flags.ENUM) != 0 &&
438 (types.supertype(tree.sym.type).tsym.flags() & Flags.ENUM) == 0) {
439 addEnumMembers(tree, env);
440 }
441 memberEnter(tree.defs, env);
442 }
443
444 /** Add the implicit members for an enum type
445 * to the symbol table.
446 */
447 private void addEnumMembers(JCClassDecl tree, Env<AttrContext> env) {
448 JCExpression valuesType = make.Type(new ArrayType(tree.sym.type, syms.arrayClass));
449
450 // public static T[] values() { return ???; }
451 JCMethodDecl values = make.
452 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
453 names.values,
454 valuesType,
455 List.<JCTypeParameter>nil(),
456 List.<JCVariableDecl>nil(),
457 List.<JCExpression>nil(), // thrown
458 null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
459 null);
460 memberEnter(values, env);
461
462 // public static T valueOf(String name) { return ???; }
463 JCMethodDecl valueOf = make.
464 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
465 names.valueOf,
466 make.Type(tree.sym.type),
467 List.<JCTypeParameter>nil(),
468 List.of(make.VarDef(make.Modifiers(Flags.PARAMETER |
469 Flags.MANDATED),
470 names.fromString("name"),
471 make.Type(syms.stringType), null)),
472 List.<JCExpression>nil(), // thrown
473 null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
474 null);
475 memberEnter(valueOf, env);
476
477 // the remaining members are for bootstrapping only
478 if (!target.compilerBootstrap(tree.sym)) return;
479
480 // public final int ordinal() { return ???; }
481 JCMethodDecl ordinal = make.at(tree.pos).
482 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.FINAL),
483 names.ordinal,
484 make.Type(syms.intType),
485 List.<JCTypeParameter>nil(),
486 List.<JCVariableDecl>nil(),
487 List.<JCExpression>nil(),
488 null,
489 null);
490 memberEnter(ordinal, env);
491
492 // public final String name() { return ???; }
493 JCMethodDecl name = make.
494 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.FINAL),
495 names._name,
496 make.Type(syms.stringType),
497 List.<JCTypeParameter>nil(),
498 List.<JCVariableDecl>nil(),
499 List.<JCExpression>nil(),
500 null,
501 null);
502 memberEnter(name, env);
503
504 // public int compareTo(E other) { return ???; }
505 MethodSymbol compareTo = new
506 MethodSymbol(Flags.PUBLIC,
507 names.compareTo,
508 new MethodType(List.of(tree.sym.type),
509 syms.intType,
510 List.<Type>nil(),
511 syms.methodClass),
512 tree.sym);
513 memberEnter(make.MethodDef(compareTo, null), env);
514 }
515
516 public void visitTopLevel(JCCompilationUnit tree) {
517 if (tree.starImportScope.elems != null) {
518 // we must have already processed this toplevel
519 return;
520 }
521
522 // check that no class exists with same fully qualified name as
523 // toplevel package
524 if (checkClash && tree.pid != null) {
525 Symbol p = tree.packge;
526 while (p.owner != syms.rootPackage) {
527 p.owner.complete(); // enter all class members of p
528 if (syms.classes.get(p.getQualifiedName()) != null) {
529 log.error(tree.pos,
530 "pkg.clashes.with.class.of.same.name",
531 p);
532 }
533 p = p.owner;
534 }
535 }
536
537 // process package annotations
538 annotateLater(tree.packageAnnotations, env, tree.packge);
539
540 // Import-on-demand java.lang.
541 importAll(tree.pos, reader.enterPackage(names.java_lang), env);
542
543 // Process all import clauses.
544 memberEnter(tree.defs, env);
545 }
546
547 // process the non-static imports and the static imports of types.
548 public void visitImport(JCImport tree) {
549 JCFieldAccess imp = (JCFieldAccess)tree.qualid;
550 Name name = TreeInfo.name(imp);
551
552 // Create a local environment pointing to this tree to disable
553 // effects of other imports in Resolve.findGlobalType
554 Env<AttrContext> localEnv = env.dup(tree);
555
556 TypeSymbol p = attr.attribImportQualifier(tree, localEnv).tsym;
557 if (name == names.asterisk) {
558 // Import on demand.
559 chk.checkCanonical(imp.selected);
560 if (tree.staticImport)
561 importStaticAll(tree.pos, p, env);
562 else
563 importAll(tree.pos, p, env);
564 } else {
565 // Named type import.
566 if (tree.staticImport) {
567 importNamedStatic(tree.pos(), p, name, localEnv);
568 chk.checkCanonical(imp.selected);
569 } else {
570 TypeSymbol c = attribImportType(imp, localEnv).tsym;
571 chk.checkCanonical(imp);
572 importNamed(tree.pos(), c, env);
573 }
574 }
575 }
576
577 public void visitMethodDef(JCMethodDecl tree) {
578 Scope enclScope = enter.enterScope(env);
579 MethodSymbol m = new MethodSymbol(0, tree.name, null, enclScope.owner);
580 m.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, m, tree);
581 tree.sym = m;
582
583 //if this is a default method, add the DEFAULT flag to the enclosing interface
584 if ((tree.mods.flags & DEFAULT) != 0) {
585 m.enclClass().flags_field |= DEFAULT;
586 }
587
588 Env<AttrContext> localEnv = methodEnv(tree, env);
589
590 DeferredLintHandler prevLintHandler =
591 chk.setDeferredLintHandler(deferredLintHandler.setPos(tree.pos()));
592 try {
593 // Compute the method type
594 m.type = signature(tree.typarams, tree.params,
595 tree.restype, tree.recvparam,
596 tree.thrown,
597 localEnv);
598 } finally {
599 chk.setDeferredLintHandler(prevLintHandler);
600 }
601
602 // Set m.params
603 ListBuffer<VarSymbol> params = new ListBuffer<VarSymbol>();
604 JCVariableDecl lastParam = null;
605 for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) {
606 JCVariableDecl param = lastParam = l.head;
607 params.append(Assert.checkNonNull(param.sym));
608 }
609 m.params = params.toList();
610
611 // mark the method varargs, if necessary
612 if (lastParam != null && (lastParam.mods.flags & Flags.VARARGS) != 0)
613 m.flags_field |= Flags.VARARGS;
614
615 localEnv.info.scope.leave();
616 if (chk.checkUnique(tree.pos(), m, enclScope)) {
617 enclScope.enter(m);
618 }
619 annotateLater(tree.mods.annotations, localEnv, m);
620 // Visit the signature of the method. Note that
621 // TypeAnnotate doesn't descend into the body.
622 typeAnnotate(tree, localEnv, m);
623
624 if (tree.defaultValue != null)
625 annotateDefaultValueLater(tree.defaultValue, localEnv, m);
626 }
627
628 /** Create a fresh environment for method bodies.
629 * @param tree The method definition.
630 * @param env The environment current outside of the method definition.
631 */
632 Env<AttrContext> methodEnv(JCMethodDecl tree, Env<AttrContext> env) {
633 Env<AttrContext> localEnv =
634 env.dup(tree, env.info.dup(env.info.scope.dupUnshared()));
635 localEnv.enclMethod = tree;
636 localEnv.info.scope.owner = tree.sym;
637 if (tree.sym.type != null) {
638 //when this is called in the enter stage, there's no type to be set
639 localEnv.info.returnResult = attr.new ResultInfo(VAL, tree.sym.type.getReturnType());
640 }
641 if ((tree.mods.flags & STATIC) != 0) localEnv.info.staticLevel++;
642 return localEnv;
643 }
644
645 public void visitVarDef(JCVariableDecl tree) {
646 Env<AttrContext> localEnv = env;
647 if ((tree.mods.flags & STATIC) != 0 ||
648 (env.info.scope.owner.flags() & INTERFACE) != 0) {
649 localEnv = env.dup(tree, env.info.dup());
650 localEnv.info.staticLevel++;
651 }
652 DeferredLintHandler prevLintHandler =
653 chk.setDeferredLintHandler(deferredLintHandler.setPos(tree.pos()));
654 try {
655 if (TreeInfo.isEnumInit(tree)) {
656 attr.attribIdentAsEnumType(localEnv, (JCIdent)tree.vartype);
657 } else {
658 attr.attribType(tree.vartype, localEnv);
659 }
660 } finally {
661 chk.setDeferredLintHandler(prevLintHandler);
662 }
663
664 if ((tree.mods.flags & VARARGS) != 0) {
665 //if we are entering a varargs parameter, we need to replace its type
666 //(a plain array type) with the more precise VarargsType --- we need
667 //to do it this way because varargs is represented in the tree as a modifier
668 //on the parameter declaration, and not as a distinct type of array node.
669 ArrayType atype = (ArrayType)tree.vartype.type.unannotatedType();
670 tree.vartype.type = atype.makeVarargs();
671 }
672 Scope enclScope = enter.enterScope(env);
673 VarSymbol v =
674 new VarSymbol(0, tree.name, tree.vartype.type, enclScope.owner);
675 v.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, v, tree);
676 tree.sym = v;
677 if (tree.init != null) {
678 v.flags_field |= HASINIT;
679 if ((v.flags_field & FINAL) != 0 &&
680 !tree.init.hasTag(NEWCLASS) &&
681 !tree.init.hasTag(LAMBDA)) {
682 Env<AttrContext> initEnv = getInitEnv(tree, env);
683 initEnv.info.enclVar = v;
684 v.setLazyConstValue(initEnv(tree, initEnv), attr, tree.init);
685 }
686 }
687 if (chk.checkUnique(tree.pos(), v, enclScope)) {
688 chk.checkTransparentVar(tree.pos(), v, enclScope);
689 enclScope.enter(v);
690 }
691 annotateLater(tree.mods.annotations, localEnv, v);
692 typeAnnotate(tree.vartype, env, tree.sym);
693 annotate.flush();
694 v.pos = tree.pos;
695 }
696
697 /** Create a fresh environment for a variable's initializer.
698 * If the variable is a field, the owner of the environment's scope
699 * is be the variable itself, otherwise the owner is the method
700 * enclosing the variable definition.
701 *
702 * @param tree The variable definition.
703 * @param env The environment current outside of the variable definition.
704 */
705 Env<AttrContext> initEnv(JCVariableDecl tree, Env<AttrContext> env) {
706 Env<AttrContext> localEnv = env.dupto(new AttrContextEnv(tree, env.info.dup()));
707 if (tree.sym.owner.kind == TYP) {
708 localEnv.info.scope = env.info.scope.dupUnshared();
709 localEnv.info.scope.owner = tree.sym;
710 }
711 if ((tree.mods.flags & STATIC) != 0 ||
712 ((env.enclClass.sym.flags() & INTERFACE) != 0 && env.enclMethod == null))
713 localEnv.info.staticLevel++;
714 return localEnv;
715 }
716
717 /** Default member enter visitor method: do nothing
718 */
719 public void visitTree(JCTree tree) {
720 }
721
722 public void visitErroneous(JCErroneous tree) {
723 if (tree.errs != null)
724 memberEnter(tree.errs, env);
725 }
726
727 public Env<AttrContext> getMethodEnv(JCMethodDecl tree, Env<AttrContext> env) {
728 Env<AttrContext> mEnv = methodEnv(tree, env);
729 mEnv.info.lint = mEnv.info.lint.augment(tree.sym.annotations, tree.sym.flags());
730 for (List<JCTypeParameter> l = tree.typarams; l.nonEmpty(); l = l.tail)
731 mEnv.info.scope.enterIfAbsent(l.head.type.tsym);
732 for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail)
733 mEnv.info.scope.enterIfAbsent(l.head.sym);
734 return mEnv;
735 }
736
737 public Env<AttrContext> getInitEnv(JCVariableDecl tree, Env<AttrContext> env) {
738 Env<AttrContext> iEnv = initEnv(tree, env);
739 return iEnv;
740 }
741
742 /* ********************************************************************
743 * Type completion
744 *********************************************************************/
745
746 Type attribImportType(JCTree tree, Env<AttrContext> env) {
747 Assert.check(completionEnabled);
748 try {
749 // To prevent deep recursion, suppress completion of some
750 // types.
751 completionEnabled = false;
752 return attr.attribType(tree, env);
753 } finally {
754 completionEnabled = true;
755 }
756 }
757
758 /* ********************************************************************
759 * Annotation processing
760 *********************************************************************/
761
762 /** Queue annotations for later processing. */
763 void annotateLater(final List<JCAnnotation> annotations,
764 final Env<AttrContext> localEnv,
765 final Symbol s) {
766 if (annotations.isEmpty()) {
767 return;
768 }
769 if (s.kind != PCK) {
770 s.annotations.reset(); // mark Annotations as incomplete for now
771 }
772 annotate.normal(new Annotate.Annotator() {
773 @Override
774 public String toString() {
775 return "annotate " + annotations + " onto " + s + " in " + s.owner;
776 }
777
778 @Override
779 public void enterAnnotation() {
780 Assert.check(s.kind == PCK || s.annotations.pendingCompletion());
781 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
782 try {
783 if (!s.annotations.isEmpty() &&
784 annotations.nonEmpty())
785 log.error(annotations.head.pos,
786 "already.annotated",
787 kindName(s), s);
788 actualEnterAnnotations(annotations, localEnv, s);
789 } finally {
790 log.useSource(prev);
791 }
792 }
793 });
794 }
795
796 /**
797 * Check if a list of annotations contains a reference to
798 * java.lang.Deprecated.
799 **/
800 private boolean hasDeprecatedAnnotation(List<JCAnnotation> annotations) {
801 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
802 JCAnnotation a = al.head;
803 if (a.annotationType.type == syms.deprecatedType && a.args.isEmpty())
804 return true;
805 }
806 return false;
807 }
808
809 /** Enter a set of annotations. */
810 private void actualEnterAnnotations(List<JCAnnotation> annotations,
811 Env<AttrContext> env,
812 Symbol s) {
813 Map<TypeSymbol, ListBuffer<Attribute.Compound>> annotated =
814 new LinkedHashMap<TypeSymbol, ListBuffer<Attribute.Compound>>();
815 Map<Attribute.Compound, DiagnosticPosition> pos =
816 new HashMap<Attribute.Compound, DiagnosticPosition>();
817
818 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
819 JCAnnotation a = al.head;
820 Attribute.Compound c = annotate.enterAnnotation(a,
821 syms.annotationType,
822 env);
823 if (c == null) {
824 continue;
825 }
826
827 if (annotated.containsKey(a.type.tsym)) {
828 if (source.allowRepeatedAnnotations()) {
829 ListBuffer<Attribute.Compound> l = annotated.get(a.type.tsym);
830 l = l.append(c);
831 annotated.put(a.type.tsym, l);
832 pos.put(c, a.pos());
833 } else {
834 log.error(a.pos(), "duplicate.annotation");
835 }
836 } else {
837 annotated.put(a.type.tsym, ListBuffer.of(c));
838 pos.put(c, a.pos());
839 }
840
841 // Note: @Deprecated has no effect on local variables and parameters
842 if (!c.type.isErroneous()
843 && s.owner.kind != MTH
844 && types.isSameType(c.type, syms.deprecatedType)) {
845 s.flags_field |= Flags.DEPRECATED;
846 }
847 }
848
849 s.annotations.setDeclarationAttributesWithCompletion(
850 annotate.new AnnotateRepeatedContext<Attribute.Compound>(env, annotated, pos, log, false));
851 }
852
853 /** Queue processing of an attribute default value. */
854 void annotateDefaultValueLater(final JCExpression defaultValue,
855 final Env<AttrContext> localEnv,
856 final MethodSymbol m) {
857 annotate.normal(new Annotate.Annotator() {
858 @Override
859 public String toString() {
860 return "annotate " + m.owner + "." +
861 m + " default " + defaultValue;
862 }
863
864 @Override
865 public void enterAnnotation() {
866 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
867 try {
868 enterDefaultValue(defaultValue, localEnv, m);
869 } finally {
870 log.useSource(prev);
871 }
872 }
873 });
874 }
875
876 /** Enter a default value for an attribute method. */
877 private void enterDefaultValue(final JCExpression defaultValue,
878 final Env<AttrContext> localEnv,
879 final MethodSymbol m) {
880 m.defaultValue = annotate.enterAttributeValue(m.type.getReturnType(),
881 defaultValue,
882 localEnv);
883 }
884
885 /* ********************************************************************
886 * Source completer
887 *********************************************************************/
888
889 /** Complete entering a class.
890 * @param sym The symbol of the class to be completed.
891 */
892 public void complete(Symbol sym) throws CompletionFailure {
893 // Suppress some (recursive) MemberEnter invocations
894 if (!completionEnabled) {
895 // Re-install same completer for next time around and return.
896 Assert.check((sym.flags() & Flags.COMPOUND) == 0);
897 sym.completer = this;
898 return;
899 }
900
901 ClassSymbol c = (ClassSymbol)sym;
902 ClassType ct = (ClassType)c.type;
903 Env<AttrContext> env = enter.typeEnvs.get(c);
904 JCClassDecl tree = (JCClassDecl)env.tree;
905 boolean wasFirst = isFirst;
906 isFirst = false;
907
908 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
909 try {
910 // Save class environment for later member enter (2) processing.
911 halfcompleted.append(env);
912
913 // Mark class as not yet attributed.
914 c.flags_field |= UNATTRIBUTED;
915
916 // If this is a toplevel-class, make sure any preceding import
917 // clauses have been seen.
918 if (c.owner.kind == PCK) {
919 memberEnter(env.toplevel, env.enclosing(TOPLEVEL));
920 todo.append(env);
921 }
922
923 if (c.owner.kind == TYP)
924 c.owner.complete();
925
926 // create an environment for evaluating the base clauses
927 Env<AttrContext> baseEnv = baseEnv(tree, env);
928
929 if (tree.extending != null)
930 typeAnnotate(tree.extending, baseEnv, sym);
931 for (JCExpression impl : tree.implementing)
932 typeAnnotate(impl, baseEnv, sym);
933 annotate.flush();
934
935 // Determine supertype.
936 Type supertype =
937 (tree.extending != null)
938 ? attr.attribBase(tree.extending, baseEnv, true, false, true)
939 : ((tree.mods.flags & Flags.ENUM) != 0 && !target.compilerBootstrap(c))
940 ? attr.attribBase(enumBase(tree.pos, c), baseEnv,
941 true, false, false)
942 : (c.fullname == names.java_lang_Object)
943 ? Type.noType
944 : syms.objectType;
945 ct.supertype_field = modelMissingTypes(supertype, tree.extending, false);
946
947 // Determine interfaces.
948 ListBuffer<Type> interfaces = new ListBuffer<Type>();
949 ListBuffer<Type> all_interfaces = null; // lazy init
950 Set<Type> interfaceSet = new HashSet<Type>();
951 List<JCExpression> interfaceTrees = tree.implementing;
952 if ((tree.mods.flags & Flags.ENUM) != 0 && target.compilerBootstrap(c)) {
953 // add interface Comparable<T>
954 interfaceTrees =
955 interfaceTrees.prepend(make.Type(new ClassType(syms.comparableType.getEnclosingType(),
956 List.of(c.type),
957 syms.comparableType.tsym)));
958 // add interface Serializable
959 interfaceTrees =
960 interfaceTrees.prepend(make.Type(syms.serializableType));
961 }
962 for (JCExpression iface : interfaceTrees) {
963 Type i = attr.attribBase(iface, baseEnv, false, true, true);
964 if (i.hasTag(CLASS)) {
965 interfaces.append(i);
966 if (all_interfaces != null) all_interfaces.append(i);
967 chk.checkNotRepeated(iface.pos(), types.erasure(i), interfaceSet);
968 } else {
969 if (all_interfaces == null)
970 all_interfaces = new ListBuffer<Type>().appendList(interfaces);
971 all_interfaces.append(modelMissingTypes(i, iface, true));
972 }
973 }
974 if ((c.flags_field & ANNOTATION) != 0) {
975 ct.interfaces_field = List.of(syms.annotationType);
976 ct.all_interfaces_field = ct.interfaces_field;
977 } else {
978 ct.interfaces_field = interfaces.toList();
979 ct.all_interfaces_field = (all_interfaces == null)
980 ? ct.interfaces_field : all_interfaces.toList();
981 }
982
983 if (c.fullname == names.java_lang_Object) {
984 if (tree.extending != null) {
985 chk.checkNonCyclic(tree.extending.pos(),
986 supertype);
987 ct.supertype_field = Type.noType;
988 }
989 else if (tree.implementing.nonEmpty()) {
990 chk.checkNonCyclic(tree.implementing.head.pos(),
991 ct.interfaces_field.head);
992 ct.interfaces_field = List.nil();
993 }
994 }
995
996 // Annotations.
997 // In general, we cannot fully process annotations yet, but we
998 // can attribute the annotation types and then check to see if the
999 // @Deprecated annotation is present.
1000 attr.attribAnnotationTypes(tree.mods.annotations, baseEnv);
1001 if (hasDeprecatedAnnotation(tree.mods.annotations))
1002 c.flags_field |= DEPRECATED;
1003 annotateLater(tree.mods.annotations, baseEnv, c);
1004 // class type parameters use baseEnv but everything uses env
1005
1006 chk.checkNonCyclicDecl(tree);
1007
1008 attr.attribTypeVariables(tree.typarams, baseEnv);
1009 // Do this here, where we have the symbol.
1010 for (JCTypeParameter tp : tree.typarams)
1011 typeAnnotate(tp, baseEnv, sym);
1012 annotate.flush();
1013
1014 // Add default constructor if needed.
1015 if ((c.flags() & INTERFACE) == 0 &&
1016 !TreeInfo.hasConstructors(tree.defs)) {
1017 List<Type> argtypes = List.nil();
1018 List<Type> typarams = List.nil();
1019 List<Type> thrown = List.nil();
1020 long ctorFlags = 0;
1021 boolean based = false;
1022 boolean addConstructor = true;
1023 if (c.name.isEmpty()) {
1024 JCNewClass nc = (JCNewClass)env.next.tree;
1025 if (nc.constructor != null) {
1026 addConstructor = nc.constructor.kind != ERR;
1027 Type superConstrType = types.memberType(c.type,
1028 nc.constructor);
1029 argtypes = superConstrType.getParameterTypes();
1030 typarams = superConstrType.getTypeArguments();
1031 ctorFlags = nc.constructor.flags() & VARARGS;
1032 if (nc.encl != null) {
1033 argtypes = argtypes.prepend(nc.encl.type);
1034 based = true;
1035 }
1036 thrown = superConstrType.getThrownTypes();
1037 }
1038 }
1039 if (addConstructor) {
1040 JCTree constrDef = DefaultConstructor(make.at(tree.pos), c,
1041 typarams, argtypes, thrown,
1042 ctorFlags, based);
1043 tree.defs = tree.defs.prepend(constrDef);
1044 }
1045 }
1046
1047 // enter symbols for 'this' into current scope.
1048 VarSymbol thisSym =
1049 new VarSymbol(FINAL | HASINIT, names._this, c.type, c);
1050 thisSym.pos = Position.FIRSTPOS;
1051 env.info.scope.enter(thisSym);
1052 // if this is a class, enter symbol for 'super' into current scope.
1053 if ((c.flags_field & INTERFACE) == 0 &&
1054 ct.supertype_field.hasTag(CLASS)) {
1055 VarSymbol superSym =
1056 new VarSymbol(FINAL | HASINIT, names._super,
1057 ct.supertype_field, c);
1058 superSym.pos = Position.FIRSTPOS;
1059 env.info.scope.enter(superSym);
1060 }
1061
1062 // check that no package exists with same fully qualified name,
1063 // but admit classes in the unnamed package which have the same
1064 // name as a top-level package.
1065 if (checkClash &&
1066 c.owner.kind == PCK && c.owner != syms.unnamedPackage &&
1067 reader.packageExists(c.fullname)) {
1068 log.error(tree.pos, "clash.with.pkg.of.same.name", Kinds.kindName(sym), c);
1069 }
1070 if (c.owner.kind == PCK && (c.flags_field & PUBLIC) == 0 &&
1071 !env.toplevel.sourcefile.isNameCompatible(c.name.toString(),JavaFileObject.Kind.SOURCE)) {
1072 c.flags_field |= AUXILIARY;
1073 }
1074 } catch (CompletionFailure ex) {
1075 chk.completionError(tree.pos(), ex);
1076 } finally {
1077 log.useSource(prev);
1078 }
1079
1080 // Enter all member fields and methods of a set of half completed
1081 // classes in a second phase.
1082 if (wasFirst) {
1083 try {
1084 while (halfcompleted.nonEmpty()) {
1085 finish(halfcompleted.next());
1086 }
1087 } finally {
1088 isFirst = true;
1089 }
1090 }
1091 annotate.afterRepeated(TypeAnnotations.organizeTypeAnnotationsSignatures(syms, names, log, tree));
1092 }
1093
1094 private void actualEnterTypeAnnotations(final List<JCAnnotation> annotations,
1095 final Env<AttrContext> env,
1096 final Symbol s) {
1097 Map<TypeSymbol, ListBuffer<Attribute.TypeCompound>> annotated =
1098 new LinkedHashMap<TypeSymbol, ListBuffer<Attribute.TypeCompound>>();
1099 Map<Attribute.TypeCompound, DiagnosticPosition> pos =
1100 new HashMap<Attribute.TypeCompound, DiagnosticPosition>();
1101
1102 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
1103 JCAnnotation a = al.head;
1104 Attribute.TypeCompound tc = annotate.enterTypeAnnotation(a,
1105 syms.annotationType,
1106 env);
1107 if (tc == null) {
1108 continue;
1109 }
1110
1111 if (annotated.containsKey(a.type.tsym)) {
1112 if (source.allowRepeatedAnnotations()) {
1113 ListBuffer<Attribute.TypeCompound> l = annotated.get(a.type.tsym);
1114 l = l.append(tc);
1115 annotated.put(a.type.tsym, l);
1116 pos.put(tc, a.pos());
1117 } else {
1118 log.error(a.pos(), "duplicate.annotation");
1119 }
1120 } else {
1121 annotated.put(a.type.tsym, ListBuffer.of(tc));
1122 pos.put(tc, a.pos());
1123 }
1124 }
1125
1126 s.annotations.appendTypeAttributesWithCompletion(
1127 annotate.new AnnotateRepeatedContext<Attribute.TypeCompound>(env, annotated, pos, log, true));
1128 }
1129
1130 public void typeAnnotate(final JCTree tree, final Env<AttrContext> env, final Symbol sym) {
1131 tree.accept(new TypeAnnotate(env, sym));
1132 }
1133
1134 /**
1135 * We need to use a TreeScanner, because it is not enough to visit the top-level
1136 * annotations. We also need to visit type arguments, etc.
1137 */
1138 private class TypeAnnotate extends TreeScanner {
1139 private Env<AttrContext> env;
1140 private Symbol sym;
1141
1142 public TypeAnnotate(final Env<AttrContext> env, final Symbol sym) {
1143 this.env = env;
1144 this.sym = sym;
1145 }
1146
1147 void annotateTypeLater(final List<JCAnnotation> annotations) {
1148 if (annotations.isEmpty()) {
1149 return;
1150 }
1151
1152 annotate.normal(new Annotate.Annotator() {
1153 @Override
1154 public String toString() {
1155 return "type annotate " + annotations + " onto " + sym + " in " + sym.owner;
1156 }
1157 @Override
1158 public void enterAnnotation() {
1159 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
1160 try {
1161 actualEnterTypeAnnotations(annotations, env, sym);
1162 } finally {
1163 log.useSource(prev);
1164 }
1165 }
1166 });
1167 }
1168
1169 @Override
1170 public void visitAnnotatedType(final JCAnnotatedType tree) {
1171 annotateTypeLater(tree.annotations);
1172 super.visitAnnotatedType(tree);
1173 }
1174
1175 @Override
1176 public void visitTypeParameter(final JCTypeParameter tree) {
1177 annotateTypeLater(tree.annotations);
1178 super.visitTypeParameter(tree);
1179 }
1180
1181 @Override
1182 public void visitNewArray(final JCNewArray tree) {
1183 annotateTypeLater(tree.annotations);
1184 for (List<JCAnnotation> dimAnnos : tree.dimAnnotations)
1185 annotateTypeLater(dimAnnos);
1186 super.visitNewArray(tree);
1187 }
1188
1189 @Override
1190 public void visitMethodDef(final JCMethodDecl tree) {
1191 scan(tree.mods);
1192 scan(tree.restype);
1193 scan(tree.typarams);
1194 scan(tree.recvparam);
1195 scan(tree.params);
1196 scan(tree.thrown);
1197 scan(tree.defaultValue);
1198 // Do not annotate the body, just the signature.
1199 // scan(tree.body);
1200 }
1201 }
1202
1203
1204 private Env<AttrContext> baseEnv(JCClassDecl tree, Env<AttrContext> env) {
1205 Scope baseScope = new Scope(tree.sym);
1206 //import already entered local classes into base scope
1207 for (Scope.Entry e = env.outer.info.scope.elems ; e != null ; e = e.sibling) {
1208 if (e.sym.isLocal()) {
1209 baseScope.enter(e.sym);
1210 }
1211 }
1212 //import current type-parameters into base scope
1213 if (tree.typarams != null)
1214 for (List<JCTypeParameter> typarams = tree.typarams;
1215 typarams.nonEmpty();
1216 typarams = typarams.tail)
1217 baseScope.enter(typarams.head.type.tsym);
1218 Env<AttrContext> outer = env.outer; // the base clause can't see members of this class
1219 Env<AttrContext> localEnv = outer.dup(tree, outer.info.dup(baseScope));
1220 localEnv.baseClause = true;
1221 localEnv.outer = outer;
1222 localEnv.info.isSelfCall = false;
1223 return localEnv;
1224 }
1225
1226 /** Enter member fields and methods of a class
1227 * @param env the environment current for the class block.
1228 */
1229 private void finish(Env<AttrContext> env) {
1230 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
1231 try {
1232 JCClassDecl tree = (JCClassDecl)env.tree;
1233 finishClass(tree, env);
1234 } finally {
1235 log.useSource(prev);
1236 }
1237 }
1238
1239 /** Generate a base clause for an enum type.
1240 * @param pos The position for trees and diagnostics, if any
1241 * @param c The class symbol of the enum
1242 */
1243 private JCExpression enumBase(int pos, ClassSymbol c) {
1244 JCExpression result = make.at(pos).
1245 TypeApply(make.QualIdent(syms.enumSym),
1246 List.<JCExpression>of(make.Type(c.type)));
1247 return result;
1248 }
1249
1250 Type modelMissingTypes(Type t, final JCExpression tree, final boolean interfaceExpected) {
1251 if (!t.hasTag(ERROR))
1252 return t;
1253
1254 return new ErrorType(((ErrorType) t).getOriginalType(), t.tsym) {
1255 private Type modelType;
1256
1257 @Override
1258 public Type getModelType() {
1259 if (modelType == null)
1260 modelType = new Synthesizer(getOriginalType(), interfaceExpected).visit(tree);
1261 return modelType;
1262 }
1263 };
1264 }
1265 // where
1266 private class Synthesizer extends JCTree.Visitor {
1267 Type originalType;
1268 boolean interfaceExpected;
1269 List<ClassSymbol> synthesizedSymbols = List.nil();
1270 Type result;
1271
1272 Synthesizer(Type originalType, boolean interfaceExpected) {
1273 this.originalType = originalType;
1274 this.interfaceExpected = interfaceExpected;
1275 }
1276
1277 Type visit(JCTree tree) {
1278 tree.accept(this);
1279 return result;
1280 }
1281
1282 List<Type> visit(List<? extends JCTree> trees) {
1283 ListBuffer<Type> lb = new ListBuffer<Type>();
1284 for (JCTree t: trees)
1285 lb.append(visit(t));
1286 return lb.toList();
1287 }
1288
1289 @Override
1290 public void visitTree(JCTree tree) {
1291 result = syms.errType;
1292 }
1293
1294 @Override
1295 public void visitIdent(JCIdent tree) {
1296 if (!tree.type.hasTag(ERROR)) {
1297 result = tree.type;
1298 } else {
1299 result = synthesizeClass(tree.name, syms.unnamedPackage).type;
1300 }
1301 }
1302
1303 @Override
1304 public void visitSelect(JCFieldAccess tree) {
1305 if (!tree.type.hasTag(ERROR)) {
1306 result = tree.type;
1307 } else {
1308 Type selectedType;
1309 boolean prev = interfaceExpected;
1310 try {
1311 interfaceExpected = false;
1312 selectedType = visit(tree.selected);
1313 } finally {
1314 interfaceExpected = prev;
1315 }
1316 ClassSymbol c = synthesizeClass(tree.name, selectedType.tsym);
1317 result = c.type;
1318 }
1319 }
1320
1321 @Override
1322 public void visitTypeApply(JCTypeApply tree) {
1323 if (!tree.type.hasTag(ERROR)) {
1324 result = tree.type;
1325 } else {
1326 ClassType clazzType = (ClassType) visit(tree.clazz);
1327 if (synthesizedSymbols.contains(clazzType.tsym))
1328 synthesizeTyparams((ClassSymbol) clazzType.tsym, tree.arguments.size());
1329 final List<Type> actuals = visit(tree.arguments);
1330 result = new ErrorType(tree.type, clazzType.tsym) {
1331 @Override
1332 public List<Type> getTypeArguments() {
1333 return actuals;
1334 }
1335 };
1336 }
1337 }
1338
1339 ClassSymbol synthesizeClass(Name name, Symbol owner) {
1340 int flags = interfaceExpected ? INTERFACE : 0;
1341 ClassSymbol c = new ClassSymbol(flags, name, owner);
1342 c.members_field = new Scope.ErrorScope(c);
1343 c.type = new ErrorType(originalType, c) {
1344 @Override
1345 public List<Type> getTypeArguments() {
1346 return typarams_field;
1347 }
1348 };
1349 synthesizedSymbols = synthesizedSymbols.prepend(c);
1350 return c;
1351 }
1352
1353 void synthesizeTyparams(ClassSymbol sym, int n) {
1354 ClassType ct = (ClassType) sym.type;
1355 Assert.check(ct.typarams_field.isEmpty());
1356 if (n == 1) {
1357 TypeVar v = new TypeVar(names.fromString("T"), sym, syms.botType);
1358 ct.typarams_field = ct.typarams_field.prepend(v);
1359 } else {
1360 for (int i = n; i > 0; i--) {
1361 TypeVar v = new TypeVar(names.fromString("T" + i), sym, syms.botType);
1362 ct.typarams_field = ct.typarams_field.prepend(v);
1363 }
1364 }
1365 }
1366 }
1367
1368
1369 /* ***************************************************************************
1370 * tree building
1371 ****************************************************************************/
1372
1373 /** Generate default constructor for given class. For classes different
1374 * from java.lang.Object, this is:
1375 *
1376 * c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
1377 * super(x_0, ..., x_n)
1378 * }
1379 *
1380 * or, if based == true:
1381 *
1382 * c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
1383 * x_0.super(x_1, ..., x_n)
1384 * }
1385 *
1386 * @param make The tree factory.
1387 * @param c The class owning the default constructor.
1388 * @param argtypes The parameter types of the constructor.
1389 * @param thrown The thrown exceptions of the constructor.
1390 * @param based Is first parameter a this$n?
1391 */
1392 JCTree DefaultConstructor(TreeMaker make,
1393 ClassSymbol c,
1394 List<Type> typarams,
1395 List<Type> argtypes,
1396 List<Type> thrown,
1397 long flags,
1398 boolean based) {
1399 List<JCVariableDecl> params = make.Params(argtypes, syms.noSymbol);
1400 List<JCStatement> stats = List.nil();
1401 if (c.type != syms.objectType)
1402 stats = stats.prepend(SuperCall(make, typarams, params, based));
1403 if ((c.flags() & ENUM) != 0 &&
1404 (types.supertype(c.type).tsym == syms.enumSym ||
1405 target.compilerBootstrap(c))) {
1406 // constructors of true enums are private
1407 flags = (flags & ~AccessFlags) | PRIVATE | GENERATEDCONSTR;
1408 } else
1409 flags |= (c.flags() & AccessFlags) | GENERATEDCONSTR;
1410 if (c.name.isEmpty()) flags |= ANONCONSTR;
1411 JCTree result = make.MethodDef(
1412 make.Modifiers(flags),
1413 names.init,
1414 null,
1415 make.TypeParams(typarams),
1416 params,
1417 make.Types(thrown),
1418 make.Block(0, stats),
1419 null);
1420 return result;
1421 }
1422
1423 /** Generate call to superclass constructor. This is:
1424 *
1425 * super(id_0, ..., id_n)
1426 *
1427 * or, if based == true
1428 *
1429 * id_0.super(id_1,...,id_n)
1430 *
1431 * where id_0, ..., id_n are the names of the given parameters.
1432 *
1433 * @param make The tree factory
1434 * @param params The parameters that need to be passed to super
1435 * @param typarams The type parameters that need to be passed to super
1436 * @param based Is first parameter a this$n?
1437 */
1438 JCExpressionStatement SuperCall(TreeMaker make,
1439 List<Type> typarams,
1440 List<JCVariableDecl> params,
1441 boolean based) {
1442 JCExpression meth;
1443 if (based) {
1444 meth = make.Select(make.Ident(params.head), names._super);
1445 params = params.tail;
1446 } else {
1447 meth = make.Ident(names._super);
1448 }
1449 List<JCExpression> typeargs = typarams.nonEmpty() ? make.Types(typarams) : null;
1450 return make.Exec(make.Apply(typeargs, meth, make.Idents(params)));
1451 }
1452 }