1 /*
2 * Copyright (c) 1999, 2019, 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.tree;
27
28 import java.util.Iterator;
29
30 import com.sun.source.tree.CaseTree;
31 import com.sun.source.tree.ModuleTree.ModuleKind;
32 import com.sun.source.tree.Tree.Kind;
33 import com.sun.tools.javac.code.*;
34 import com.sun.tools.javac.code.Attribute.UnresolvedClass;
35 import com.sun.tools.javac.code.Symbol.*;
36 import com.sun.tools.javac.code.Type.*;
37 import com.sun.tools.javac.util.*;
38 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
39
40 import com.sun.tools.javac.tree.JCTree.*;
41
42 import static com.sun.tools.javac.code.Flags.*;
43 import static com.sun.tools.javac.code.Kinds.Kind.*;
44 import static com.sun.tools.javac.code.TypeTag.*;
45
46 /** Factory class for trees.
47 *
48 * <p><b>This is NOT part of any supported API.
49 * If you write code that depends on this, you do so at your own risk.
50 * This code and its internal interfaces are subject to change or
51 * deletion without notice.</b>
52 */
53 public class TreeMaker implements JCTree.Factory {
54
55 /** The context key for the tree factory. */
56 protected static final Context.Key<TreeMaker> treeMakerKey = new Context.Key<>();
57
58 /** Get the TreeMaker instance. */
59 public static TreeMaker instance(Context context) {
60 TreeMaker instance = context.get(treeMakerKey);
61 if (instance == null)
62 instance = new TreeMaker(context);
63 return instance;
64 }
65
66 /** The position at which subsequent trees will be created.
67 */
68 public int pos = Position.NOPOS;
69
70 /** The toplevel tree to which created trees belong.
71 */
72 public JCCompilationUnit toplevel;
73
74 /** The current name table. */
75 Names names;
76
77 Types types;
78
79 /** The current symbol table. */
80 Symtab syms;
81
82 /** Create a tree maker with null toplevel and NOPOS as initial position.
83 */
84 protected TreeMaker(Context context) {
85 context.put(treeMakerKey, this);
86 this.pos = Position.NOPOS;
87 this.toplevel = null;
88 this.names = Names.instance(context);
89 this.syms = Symtab.instance(context);
90 this.types = Types.instance(context);
91 }
92
93 /** Create a tree maker with a given toplevel and FIRSTPOS as initial position.
94 */
95 protected TreeMaker(JCCompilationUnit toplevel, Names names, Types types, Symtab syms) {
96 this.pos = Position.FIRSTPOS;
97 this.toplevel = toplevel;
98 this.names = names;
99 this.types = types;
100 this.syms = syms;
101 }
102
103 /** Create a new tree maker for a given toplevel.
104 */
105 public TreeMaker forToplevel(JCCompilationUnit toplevel) {
106 return new TreeMaker(toplevel, names, types, syms);
107 }
108
109 /** Reassign current position.
110 */
111 public TreeMaker at(int pos) {
112 this.pos = pos;
113 return this;
114 }
115
116 /** Reassign current position.
117 */
118 public TreeMaker at(DiagnosticPosition pos) {
119 this.pos = (pos == null ? Position.NOPOS : pos.getStartPosition());
120 return this;
121 }
122
123 /**
124 * Create given tree node at current position.
125 * @param defs a list of PackageDef, ClassDef, Import, and Skip
126 */
127 public JCCompilationUnit TopLevel(List<JCTree> defs) {
128 for (JCTree node : defs)
129 Assert.check(node instanceof JCClassDecl
130 || node instanceof JCPackageDecl
131 || node instanceof JCImport
132 || node instanceof JCModuleDecl
133 || node instanceof JCSkip
134 || node instanceof JCErroneous
135 || (node instanceof JCExpressionStatement
136 && ((JCExpressionStatement)node).expr instanceof JCErroneous),
137 () -> node.getClass().getSimpleName());
138 JCCompilationUnit tree = new JCCompilationUnit(defs);
139 tree.pos = pos;
140 return tree;
141 }
142
143 public JCPackageDecl PackageDecl(List<JCAnnotation> annotations,
144 JCExpression pid) {
145 Assert.checkNonNull(annotations);
146 Assert.checkNonNull(pid);
147 JCPackageDecl tree = new JCPackageDecl(annotations, pid);
148 tree.pos = pos;
149 return tree;
150 }
151
152 public JCImport Import(JCTree qualid, boolean importStatic) {
153 JCImport tree = new JCImport(qualid, importStatic);
154 tree.pos = pos;
155 return tree;
156 }
157
158 public JCClassDecl ClassDef(JCModifiers mods,
159 Name name,
160 List<JCTypeParameter> typarams,
161 JCExpression extending,
162 List<JCExpression> implementing,
163 List<JCTree> defs)
164 {
165 JCClassDecl tree = new JCClassDecl(mods,
166 name,
167 typarams,
168 extending,
169 implementing,
170 defs,
171 null);
172 tree.pos = pos;
173 return tree;
174 }
175
176 public JCMethodDecl MethodDef(JCModifiers mods,
177 Name name,
178 JCExpression restype,
179 List<JCTypeParameter> typarams,
180 List<JCVariableDecl> params,
181 List<JCExpression> thrown,
182 JCBlock body,
183 JCExpression defaultValue) {
184 return MethodDef(
185 mods, name, restype, typarams, null, params,
186 thrown, body, defaultValue);
187 }
188
189 public JCMethodDecl MethodDef(JCModifiers mods,
190 Name name,
191 JCExpression restype,
192 List<JCTypeParameter> typarams,
193 JCVariableDecl recvparam,
194 List<JCVariableDecl> params,
195 List<JCExpression> thrown,
196 JCBlock body,
197 JCExpression defaultValue)
198 {
199 JCMethodDecl tree = new JCMethodDecl(mods,
200 name,
201 restype,
202 typarams,
203 recvparam,
204 params,
205 thrown,
206 body,
207 defaultValue,
208 null);
209 tree.pos = pos;
210 return tree;
211 }
212
213 public JCVariableDecl VarDef(JCModifiers mods, Name name, JCExpression vartype, JCExpression init) {
214 JCVariableDecl tree = new JCVariableDecl(mods, name, vartype, init, null);
215 tree.pos = pos;
216 return tree;
217 }
218
219 public JCVariableDecl ReceiverVarDef(JCModifiers mods, JCExpression name, JCExpression vartype) {
220 JCVariableDecl tree = new JCVariableDecl(mods, name, vartype);
221 tree.pos = pos;
222 return tree;
223 }
224
225 public JCSkip Skip() {
226 JCSkip tree = new JCSkip();
227 tree.pos = pos;
228 return tree;
229 }
230
231 public JCBlock Block(long flags, List<JCStatement> stats) {
232 JCBlock tree = new JCBlock(flags, stats);
233 tree.pos = pos;
234 return tree;
235 }
236
237 public JCDoWhileLoop DoLoop(JCStatement body, JCExpression cond) {
238 JCDoWhileLoop tree = new JCDoWhileLoop(body, cond);
239 tree.pos = pos;
240 return tree;
241 }
242
243 public JCWhileLoop WhileLoop(JCExpression cond, JCStatement body) {
244 JCWhileLoop tree = new JCWhileLoop(cond, body);
245 tree.pos = pos;
246 return tree;
247 }
248
249 public JCForLoop ForLoop(List<JCStatement> init,
250 JCExpression cond,
251 List<JCExpressionStatement> step,
252 JCStatement body)
253 {
254 JCForLoop tree = new JCForLoop(init, cond, step, body);
255 tree.pos = pos;
256 return tree;
257 }
258
259 public JCEnhancedForLoop ForeachLoop(JCVariableDecl var, JCExpression expr, JCStatement body) {
260 JCEnhancedForLoop tree = new JCEnhancedForLoop(var, expr, body);
261 tree.pos = pos;
262 return tree;
263 }
264
265 public JCLabeledStatement Labelled(Name label, JCStatement body) {
266 JCLabeledStatement tree = new JCLabeledStatement(label, body);
267 tree.pos = pos;
268 return tree;
269 }
270
271 public JCSwitch Switch(JCExpression selector, List<JCCase> cases) {
272 JCSwitch tree = new JCSwitch(selector, cases);
273 tree.pos = pos;
274 return tree;
275 }
276
277 public JCCase Case(@SuppressWarnings("preview") CaseTree.CaseKind caseKind, List<JCExpression> pats,
278 List<JCStatement> stats, JCTree body) {
279 JCCase tree = new JCCase(caseKind, pats, stats, body);
280 tree.pos = pos;
281 return tree;
282 }
283
284 public JCSwitchExpression SwitchExpression(JCExpression selector, List<JCCase> cases) {
285 JCSwitchExpression tree = new JCSwitchExpression(selector, cases);
286 tree.pos = pos;
287 return tree;
288 }
289
290 public JCSynchronized Synchronized(JCExpression lock, JCBlock body) {
291 JCSynchronized tree = new JCSynchronized(lock, body);
292 tree.pos = pos;
293 return tree;
294 }
295
296 public JCTry Try(JCBlock body, List<JCCatch> catchers, JCBlock finalizer) {
297 return Try(List.nil(), body, catchers, finalizer);
298 }
299
300 public JCTry Try(List<JCTree> resources,
301 JCBlock body,
302 List<JCCatch> catchers,
303 JCBlock finalizer) {
304 JCTry tree = new JCTry(resources, body, catchers, finalizer);
305 tree.pos = pos;
306 return tree;
307 }
308
309 public JCCatch Catch(JCVariableDecl param, JCBlock body) {
310 JCCatch tree = new JCCatch(param, body);
311 tree.pos = pos;
312 return tree;
313 }
314
315 public JCConditional Conditional(JCExpression cond,
316 JCExpression thenpart,
317 JCExpression elsepart)
318 {
319 JCConditional tree = new JCConditional(cond, thenpart, elsepart);
320 tree.pos = pos;
321 return tree;
322 }
323
324 public JCIf If(JCExpression cond, JCStatement thenpart, JCStatement elsepart) {
325 JCIf tree = new JCIf(cond, thenpart, elsepart);
326 tree.pos = pos;
327 return tree;
328 }
329
330 public JCExpressionStatement Exec(JCExpression expr) {
331 JCExpressionStatement tree = new JCExpressionStatement(expr);
332 tree.pos = pos;
333 return tree;
334 }
335
336 public JCBreak Break(Name label) {
337 JCBreak tree = new JCBreak(label, null);
338 tree.pos = pos;
339 return tree;
340 }
341
342 public JCYield Yield(JCExpression value) {
343 JCYield tree = new JCYield(value, null);
344 tree.pos = pos;
345 return tree;
346 }
347
348 public JCContinue Continue(Name label) {
349 JCContinue tree = new JCContinue(label, null);
350 tree.pos = pos;
351 return tree;
352 }
353
354 public JCReturn Return(JCExpression expr) {
355 JCReturn tree = new JCReturn(expr);
356 tree.pos = pos;
357 return tree;
358 }
359
360 public JCThrow Throw(JCExpression expr) {
361 JCThrow tree = new JCThrow(expr);
362 tree.pos = pos;
363 return tree;
364 }
365
366 public JCAssert Assert(JCExpression cond, JCExpression detail) {
367 JCAssert tree = new JCAssert(cond, detail);
368 tree.pos = pos;
369 return tree;
370 }
371
372 public JCMethodInvocation Apply(List<JCExpression> typeargs,
373 JCExpression fn,
374 List<JCExpression> args)
375 {
376 JCMethodInvocation tree = new JCMethodInvocation(typeargs, fn, args);
377 tree.pos = pos;
378 return tree;
379 }
380
381 public JCNewClass NewClass(JCExpression encl,
382 List<JCExpression> typeargs,
383 JCExpression clazz,
384 List<JCExpression> args,
385 JCClassDecl def)
386 {
387 return SpeculativeNewClass(encl, typeargs, clazz, args, def, false);
388 }
389
390 public JCNewClass SpeculativeNewClass(JCExpression encl,
391 List<JCExpression> typeargs,
392 JCExpression clazz,
393 List<JCExpression> args,
394 JCClassDecl def,
395 boolean classDefRemoved)
396 {
397 JCNewClass tree = classDefRemoved ?
398 new JCNewClass(encl, typeargs, clazz, args, def) {
399 @Override
400 public boolean classDeclRemoved() {
401 return true;
402 }
403 } :
404 new JCNewClass(encl, typeargs, clazz, args, def);
405 tree.pos = pos;
406 return tree;
407 }
408
409 public JCNewArray NewArray(JCExpression elemtype,
410 List<JCExpression> dims,
411 List<JCExpression> elems)
412 {
413 JCNewArray tree = new JCNewArray(elemtype, dims, elems);
414 tree.pos = pos;
415 return tree;
416 }
417
418 public JCLambda Lambda(List<JCVariableDecl> params,
419 JCTree body)
420 {
421 JCLambda tree = new JCLambda(params, body);
422 tree.pos = pos;
423 return tree;
424 }
425
426 public JCParens Parens(JCExpression expr) {
427 JCParens tree = new JCParens(expr);
428 tree.pos = pos;
429 return tree;
430 }
431
432 public JCAssign Assign(JCExpression lhs, JCExpression rhs) {
433 JCAssign tree = new JCAssign(lhs, rhs);
434 tree.pos = pos;
435 return tree;
436 }
437
438 public JCAssignOp Assignop(JCTree.Tag opcode, JCTree lhs, JCTree rhs) {
439 JCAssignOp tree = new JCAssignOp(opcode, lhs, rhs, null);
440 tree.pos = pos;
441 return tree;
442 }
443
444 public JCUnary Unary(JCTree.Tag opcode, JCExpression arg) {
445 JCUnary tree = new JCUnary(opcode, arg);
446 tree.pos = pos;
447 return tree;
448 }
449
450 public JCBinary Binary(JCTree.Tag opcode, JCExpression lhs, JCExpression rhs) {
451 JCBinary tree = new JCBinary(opcode, lhs, rhs, null);
452 tree.pos = pos;
453 return tree;
454 }
455
456 public JCTypeCast TypeCast(JCTree clazz, JCExpression expr) {
457 JCTypeCast tree = new JCTypeCast(clazz, expr);
458 tree.pos = pos;
459 return tree;
460 }
461
462 public JCInstanceOf TypeTest(JCExpression expr, JCTree clazz) {
463 JCInstanceOf tree = new JCInstanceOf(expr, clazz);
464 tree.pos = pos;
465 return tree;
466 }
467
468 public JCArrayAccess Indexed(JCExpression indexed, JCExpression index) {
469 JCArrayAccess tree = new JCArrayAccess(indexed, index);
470 tree.pos = pos;
471 return tree;
472 }
473
474 public JCFieldAccess Select(JCExpression selected, Name selector) {
475 JCFieldAccess tree = new JCFieldAccess(selected, selector, null);
476 tree.pos = pos;
477 return tree;
478 }
479
480 public JCMemberReference Reference(JCMemberReference.ReferenceMode mode, Name name,
481 JCExpression expr, List<JCExpression> typeargs) {
482 JCMemberReference tree = new JCMemberReference(mode, name, expr, typeargs);
483 tree.pos = pos;
484 return tree;
485 }
486
487 public JCIdent Ident(Name name) {
488 JCIdent tree = new JCIdent(name, null);
489 tree.pos = pos;
490 return tree;
491 }
492
493 public JCLiteral Literal(TypeTag tag, Object value) {
494 JCLiteral tree = new JCLiteral(tag, value);
495 tree.pos = pos;
496 return tree;
497 }
498
499 public JCPrimitiveTypeTree TypeIdent(TypeTag typetag) {
500 JCPrimitiveTypeTree tree = new JCPrimitiveTypeTree(typetag);
501 tree.pos = pos;
502 return tree;
503 }
504
505 public JCArrayTypeTree TypeArray(JCExpression elemtype) {
506 JCArrayTypeTree tree = new JCArrayTypeTree(elemtype);
507 tree.pos = pos;
508 return tree;
509 }
510
511 public JCTypeApply TypeApply(JCExpression clazz, List<JCExpression> arguments) {
512 JCTypeApply tree = new JCTypeApply(clazz, arguments);
513 tree.pos = pos;
514 return tree;
515 }
516
517 public JCTypeUnion TypeUnion(List<JCExpression> components) {
518 JCTypeUnion tree = new JCTypeUnion(components);
519 tree.pos = pos;
520 return tree;
521 }
522
523 public JCTypeIntersection TypeIntersection(List<JCExpression> components) {
524 JCTypeIntersection tree = new JCTypeIntersection(components);
525 tree.pos = pos;
526 return tree;
527 }
528
529 public JCTypeParameter TypeParameter(Name name, List<JCExpression> bounds) {
530 return TypeParameter(name, bounds, List.nil());
531 }
532
533 public JCTypeParameter TypeParameter(Name name, List<JCExpression> bounds, List<JCAnnotation> annos) {
534 JCTypeParameter tree = new JCTypeParameter(name, bounds, annos);
535 tree.pos = pos;
536 return tree;
537 }
538
539 public JCWildcard Wildcard(TypeBoundKind kind, JCTree type) {
540 JCWildcard tree = new JCWildcard(kind, type);
541 tree.pos = pos;
542 return tree;
543 }
544
545 public TypeBoundKind TypeBoundKind(BoundKind kind) {
546 TypeBoundKind tree = new TypeBoundKind(kind);
547 tree.pos = pos;
548 return tree;
549 }
550
551 public JCAnnotation Annotation(JCTree annotationType, List<JCExpression> args) {
552 JCAnnotation tree = new JCAnnotation(Tag.ANNOTATION, annotationType, args);
553 tree.pos = pos;
554 return tree;
555 }
556
557 public JCAnnotation TypeAnnotation(JCTree annotationType, List<JCExpression> args) {
558 JCAnnotation tree = new JCAnnotation(Tag.TYPE_ANNOTATION, annotationType, args);
559 tree.pos = pos;
560 return tree;
561 }
562
563 public JCModifiers Modifiers(long flags, List<JCAnnotation> annotations) {
564 JCModifiers tree = new JCModifiers(flags, annotations);
565 boolean noFlags = (flags & (Flags.ModifierFlags | Flags.ANNOTATION)) == 0;
566 tree.pos = (noFlags && annotations.isEmpty()) ? Position.NOPOS : pos;
567 return tree;
568 }
569
570 public JCModifiers Modifiers(long flags) {
571 return Modifiers(flags, List.nil());
572 }
573
574 @Override
575 public JCModuleDecl ModuleDef(JCModifiers mods, ModuleKind kind,
576 JCExpression qualid, List<JCDirective> directives) {
577 JCModuleDecl tree = new JCModuleDecl(mods, kind, qualid, directives);
578 tree.pos = pos;
579 return tree;
580 }
581
582 @Override
583 public JCExports Exports(JCExpression qualId, List<JCExpression> moduleNames) {
584 JCExports tree = new JCExports(qualId, moduleNames);
585 tree.pos = pos;
586 return tree;
587 }
588
589 @Override
590 public JCOpens Opens(JCExpression qualId, List<JCExpression> moduleNames) {
591 JCOpens tree = new JCOpens(qualId, moduleNames);
592 tree.pos = pos;
593 return tree;
594 }
595
596 @Override
597 public JCProvides Provides(JCExpression serviceName, List<JCExpression> implNames) {
598 JCProvides tree = new JCProvides(serviceName, implNames);
599 tree.pos = pos;
600 return tree;
601 }
602
603 @Override
604 public JCRequires Requires(boolean isTransitive, boolean isStaticPhase, JCExpression qualId) {
605 JCRequires tree = new JCRequires(isTransitive, isStaticPhase, qualId);
606 tree.pos = pos;
607 return tree;
608 }
609
610 @Override
611 public JCUses Uses(JCExpression qualId) {
612 JCUses tree = new JCUses(qualId);
613 tree.pos = pos;
614 return tree;
615 }
616
617 public JCAnnotatedType AnnotatedType(List<JCAnnotation> annotations, JCExpression underlyingType) {
618 JCAnnotatedType tree = new JCAnnotatedType(annotations, underlyingType);
619 tree.pos = pos;
620 return tree;
621 }
622
623 public JCErroneous Erroneous() {
624 return Erroneous(List.nil());
625 }
626
627 public JCErroneous Erroneous(List<? extends JCTree> errs) {
628 JCErroneous tree = new JCErroneous(errs);
629 tree.pos = pos;
630 return tree;
631 }
632
633 public LetExpr LetExpr(List<JCStatement> defs, JCExpression expr) {
634 LetExpr tree = new LetExpr(defs, expr);
635 tree.pos = pos;
636 return tree;
637 }
638
639 /* ***************************************************************************
640 * Derived building blocks.
641 ****************************************************************************/
642
643 public JCClassDecl AnonymousClassDef(JCModifiers mods,
644 List<JCTree> defs)
645 {
646 return ClassDef(mods,
647 names.empty,
648 List.nil(),
649 null,
650 List.nil(),
651 defs);
652 }
653
654 public LetExpr LetExpr(JCVariableDecl def, JCExpression expr) {
655 LetExpr tree = new LetExpr(List.of(def), expr);
656 tree.pos = pos;
657 return tree;
658 }
659
660 /** Create an identifier from a symbol.
661 */
662 public JCIdent Ident(Symbol sym) {
663 return (JCIdent)new JCIdent((sym.name != names.empty)
664 ? sym.name
665 : sym.flatName(), sym)
666 .setPos(pos)
667 .setType(sym.type);
668 }
669
670 /** Create a selection node from a qualifier tree and a symbol.
671 * @param base The qualifier tree.
672 */
673 public JCExpression Select(JCExpression base, Symbol sym) {
674 return new JCFieldAccess(base, sym.name, sym).setPos(pos).setType(sym.type);
675 }
676
677 /** Create a qualified identifier from a symbol, adding enough qualifications
678 * to make the reference unique.
679 */
680 public JCExpression QualIdent(Symbol sym) {
681 return isUnqualifiable(sym)
682 ? Ident(sym)
683 : Select(QualIdent(sym.owner), sym);
684 }
685
686 /** Create an identifier that refers to the variable declared in given variable
687 * declaration.
688 */
689 public JCExpression Ident(JCVariableDecl param) {
690 return Ident(param.sym);
691 }
692
693 /** Create a list of identifiers referring to the variables declared
694 * in given list of variable declarations.
695 */
696 public List<JCExpression> Idents(List<JCVariableDecl> params) {
697 ListBuffer<JCExpression> ids = new ListBuffer<>();
698 for (List<JCVariableDecl> l = params; l.nonEmpty(); l = l.tail)
699 ids.append(Ident(l.head));
700 return ids.toList();
701 }
702
703 /** Create a tree representing `this', given its type.
704 */
705 public JCExpression This(Type t) {
706 return Ident(new VarSymbol(FINAL, names._this, t, t.tsym));
707 }
708
709 /** Create a tree representing qualified `this' given its type
710 */
711 public JCExpression QualThis(Type t) {
712 return Select(Type(t), new VarSymbol(FINAL, names._this, t, t.tsym));
713 }
714
715 /** Create a tree representing a class literal.
716 */
717 public JCExpression ClassLiteral(ClassSymbol clazz) {
718 return ClassLiteral(clazz.type);
719 }
720
721 /** Create a tree representing a class literal.
722 */
723 public JCExpression ClassLiteral(Type t) {
724 VarSymbol lit = new VarSymbol(STATIC | PUBLIC | FINAL,
725 names._class,
726 t,
727 t.tsym);
728 return Select(Type(t), lit);
729 }
730
731 /** Create a tree representing `super', given its type and owner.
732 */
733 public JCIdent Super(Type t, TypeSymbol owner) {
734 return Ident(new VarSymbol(FINAL, names._super, t, owner));
735 }
736
737 /**
738 * Create a method invocation from a method tree and a list of
739 * argument trees.
740 */
741 public JCMethodInvocation App(JCExpression meth, List<JCExpression> args) {
742 return Apply(null, meth, args).setType(meth.type.getReturnType());
743 }
744
745 /**
746 * Create a no-arg method invocation from a method tree
747 */
748 public JCMethodInvocation App(JCExpression meth) {
749 return Apply(null, meth, List.nil()).setType(meth.type.getReturnType());
750 }
751
752 /** Create a method invocation from a method tree and a list of argument trees.
753 */
754 public JCExpression Create(Symbol ctor, List<JCExpression> args) {
755 Type t = ctor.owner.erasure(types);
756 JCNewClass newclass = NewClass(null, null, Type(t), args, null);
757 newclass.constructor = ctor;
758 newclass.setType(t);
759 return newclass;
760 }
761
762 /** Create a tree representing given type.
763 */
764 public JCExpression Type(Type t) {
765 if (t == null) return null;
766 JCExpression tp;
767 switch (t.getTag()) {
768 case BYTE: case CHAR: case SHORT: case INT: case LONG: case FLOAT:
769 case DOUBLE: case BOOLEAN: case VOID:
770 tp = TypeIdent(t.getTag());
771 break;
772 case TYPEVAR:
773 tp = Ident(t.tsym);
774 break;
775 case WILDCARD: {
776 WildcardType a = ((WildcardType) t);
777 tp = Wildcard(TypeBoundKind(a.kind), a.kind == BoundKind.UNBOUND ? null : Type(a.type));
778 break;
779 }
780 case CLASS:
781 switch (t.getKind()) {
782 case UNION: {
783 UnionClassType tu = (UnionClassType)t;
784 ListBuffer<JCExpression> la = new ListBuffer<>();
785 for (Type ta : tu.getAlternativeTypes()) {
786 la.add(Type(ta));
787 }
788 tp = TypeUnion(la.toList());
789 break;
790 }
791 case INTERSECTION: {
792 IntersectionClassType it = (IntersectionClassType)t;
793 ListBuffer<JCExpression> la = new ListBuffer<>();
794 for (Type ta : it.getExplicitComponents()) {
795 la.add(Type(ta));
796 }
797 tp = TypeIntersection(la.toList());
798 break;
799 }
800 default: {
801 Type outer = t.getEnclosingType();
802 JCExpression clazz = outer.hasTag(CLASS) && t.tsym.owner.kind == TYP
803 ? Select(Type(outer), t.tsym)
804 : QualIdent(t.tsym);
805 tp = t.getTypeArguments().isEmpty()
806 ? clazz
807 : TypeApply(clazz, Types(t.getTypeArguments()));
808 break;
809 }
810 }
811 break;
812 case ARRAY:
813 tp = TypeArray(Type(types.elemtype(t)));
814 break;
815 case ERROR:
816 tp = TypeIdent(ERROR);
817 break;
818 default:
819 throw new AssertionError("unexpected type: " + t);
820 }
821 return tp.setType(t);
822 }
823
824 /** Create a list of trees representing given list of types.
825 */
826 public List<JCExpression> Types(List<Type> ts) {
827 ListBuffer<JCExpression> lb = new ListBuffer<>();
828 for (List<Type> l = ts; l.nonEmpty(); l = l.tail)
829 lb.append(Type(l.head));
830 return lb.toList();
831 }
832
833 /** Create a variable definition from a variable symbol and an initializer
834 * expression.
835 */
836 public JCVariableDecl VarDef(VarSymbol v, JCExpression init) {
837 return (JCVariableDecl)
838 new JCVariableDecl(
839 Modifiers(v.flags(), Annotations(v.getRawAttributes())),
840 v.name,
841 Type(v.type),
842 init,
843 v).setPos(pos).setType(v.type);
844 }
845
846 /** Create annotation trees from annotations.
847 */
848 public List<JCAnnotation> Annotations(List<Attribute.Compound> attributes) {
849 if (attributes == null) return List.nil();
850 ListBuffer<JCAnnotation> result = new ListBuffer<>();
851 for (List<Attribute.Compound> i = attributes; i.nonEmpty(); i=i.tail) {
852 Attribute a = i.head;
853 result.append(Annotation(a));
854 }
855 return result.toList();
856 }
857
858 public JCLiteral Literal(Object value) {
859 JCLiteral result = null;
860 if (value instanceof String) {
861 result = Literal(CLASS, value).
862 setType(syms.stringType.constType(value));
863 } else if (value instanceof Integer) {
864 result = Literal(INT, value).
865 setType(syms.intType.constType(value));
866 } else if (value instanceof Long) {
867 result = Literal(LONG, value).
868 setType(syms.longType.constType(value));
869 } else if (value instanceof Byte) {
870 result = Literal(BYTE, value).
871 setType(syms.byteType.constType(value));
872 } else if (value instanceof Character) {
873 int v = (int) (((Character) value).toString().charAt(0));
874 result = Literal(CHAR, v).
875 setType(syms.charType.constType(v));
876 } else if (value instanceof Double) {
877 result = Literal(DOUBLE, value).
878 setType(syms.doubleType.constType(value));
879 } else if (value instanceof Float) {
880 result = Literal(FLOAT, value).
881 setType(syms.floatType.constType(value));
882 } else if (value instanceof Short) {
883 result = Literal(SHORT, value).
884 setType(syms.shortType.constType(value));
885 } else if (value instanceof Boolean) {
886 int v = ((Boolean) value) ? 1 : 0;
887 result = Literal(BOOLEAN, v).
888 setType(syms.booleanType.constType(v));
889 } else {
890 throw new AssertionError(value);
891 }
892 return result;
893 }
894
895 class AnnotationBuilder implements Attribute.Visitor {
896 JCExpression result = null;
897 public void visitConstant(Attribute.Constant v) {
898 result = Literal(v.type.getTag(), v.value);
899 }
900 public void visitClass(Attribute.Class clazz) {
901 result = ClassLiteral(clazz.classType).setType(syms.classType);
902 }
903 public void visitEnum(Attribute.Enum e) {
904 result = QualIdent(e.value);
905 }
906 public void visitError(Attribute.Error e) {
907 if (e instanceof UnresolvedClass) {
908 result = ClassLiteral(((UnresolvedClass) e).classType).setType(syms.classType);
909 } else {
910 result = Erroneous();
911 }
912 }
913 public void visitCompound(Attribute.Compound compound) {
914 if (compound instanceof Attribute.TypeCompound) {
915 result = visitTypeCompoundInternal((Attribute.TypeCompound) compound);
916 } else {
917 result = visitCompoundInternal(compound);
918 }
919 }
920 public JCAnnotation visitCompoundInternal(Attribute.Compound compound) {
921 ListBuffer<JCExpression> args = new ListBuffer<>();
922 for (List<Pair<Symbol.MethodSymbol,Attribute>> values = compound.values; values.nonEmpty(); values=values.tail) {
923 Pair<MethodSymbol,Attribute> pair = values.head;
924 JCExpression valueTree = translate(pair.snd);
925 args.append(Assign(Ident(pair.fst), valueTree).setType(valueTree.type));
926 }
927 return Annotation(Type(compound.type), args.toList());
928 }
929 public JCAnnotation visitTypeCompoundInternal(Attribute.TypeCompound compound) {
930 ListBuffer<JCExpression> args = new ListBuffer<>();
931 for (List<Pair<Symbol.MethodSymbol,Attribute>> values = compound.values; values.nonEmpty(); values=values.tail) {
932 Pair<MethodSymbol,Attribute> pair = values.head;
933 JCExpression valueTree = translate(pair.snd);
934 args.append(Assign(Ident(pair.fst), valueTree).setType(valueTree.type));
935 }
936 return TypeAnnotation(Type(compound.type), args.toList());
937 }
938 public void visitArray(Attribute.Array array) {
939 ListBuffer<JCExpression> elems = new ListBuffer<>();
940 for (int i = 0; i < array.values.length; i++)
941 elems.append(translate(array.values[i]));
942 result = NewArray(null, List.nil(), elems.toList()).setType(array.type);
943 }
944 JCExpression translate(Attribute a) {
945 a.accept(this);
946 return result;
947 }
948 JCAnnotation translate(Attribute.Compound a) {
949 return visitCompoundInternal(a);
950 }
951 JCAnnotation translate(Attribute.TypeCompound a) {
952 return visitTypeCompoundInternal(a);
953 }
954 }
955
956 AnnotationBuilder annotationBuilder = new AnnotationBuilder();
957
958 /** Create an annotation tree from an attribute.
959 */
960 public JCAnnotation Annotation(Attribute a) {
961 return annotationBuilder.translate((Attribute.Compound)a);
962 }
963
964 public JCAnnotation TypeAnnotation(Attribute a) {
965 return annotationBuilder.translate((Attribute.TypeCompound) a);
966 }
967
968 /** Create a method definition from a method symbol and a method body.
969 */
970 public JCMethodDecl MethodDef(MethodSymbol m, JCBlock body) {
971 return MethodDef(m, m.type, body);
972 }
973
974 /** Create a method definition from a method symbol, method type
975 * and a method body.
976 */
977 public JCMethodDecl MethodDef(MethodSymbol m, Type mtype, JCBlock body) {
978 return (JCMethodDecl)
979 new JCMethodDecl(
980 Modifiers(m.flags(), Annotations(m.getRawAttributes())),
981 m.name,
982 Type(mtype.getReturnType()),
983 TypeParams(mtype.getTypeArguments()),
984 null, // receiver type
985 Params(mtype.getParameterTypes(), m),
986 Types(mtype.getThrownTypes()),
987 body,
988 null,
989 m).setPos(pos).setType(mtype);
990 }
991
992 /** Create a type parameter tree from its name and type.
993 */
994 public JCTypeParameter TypeParam(Name name, TypeVar tvar) {
995 return (JCTypeParameter)
996 TypeParameter(name, Types(types.getBounds(tvar))).setPos(pos).setType(tvar);
997 }
998
999 /** Create a list of type parameter trees from a list of type variables.
1000 */
1001 public List<JCTypeParameter> TypeParams(List<Type> typarams) {
1002 ListBuffer<JCTypeParameter> tparams = new ListBuffer<>();
1003 for (List<Type> l = typarams; l.nonEmpty(); l = l.tail)
1004 tparams.append(TypeParam(l.head.tsym.name, (TypeVar)l.head));
1005 return tparams.toList();
1006 }
1007
1008 /** Create a value parameter tree from its name, type, and owner.
1009 */
1010 public JCVariableDecl Param(Name name, Type argtype, Symbol owner) {
1011 return VarDef(new VarSymbol(PARAMETER, name, argtype, owner), null);
1012 }
1013
1014 /** Create a a list of value parameter trees x0, ..., xn from a list of
1015 * their types and an their owner.
1016 */
1017 public List<JCVariableDecl> Params(List<Type> argtypes, Symbol owner) {
1018 ListBuffer<JCVariableDecl> params = new ListBuffer<>();
1019 MethodSymbol mth = (owner.kind == MTH) ? ((MethodSymbol)owner) : null;
1020 if (mth != null && mth.params != null && argtypes.length() == mth.params.length()) {
1021 for (VarSymbol param : ((MethodSymbol)owner).params)
1022 params.append(VarDef(param, null));
1023 } else {
1024 int i = 0;
1025 for (List<Type> l = argtypes; l.nonEmpty(); l = l.tail)
1026 params.append(Param(paramName(i++), l.head, owner));
1027 }
1028 return params.toList();
1029 }
1030
1031 /** Wrap a method invocation in an expression statement or return statement,
1032 * depending on whether the method invocation expression's type is void.
1033 */
1034 public JCStatement Call(JCExpression apply) {
1035 return apply.type.hasTag(VOID) ? Exec(apply) : Return(apply);
1036 }
1037
1038 /** Construct an assignment from a variable symbol and a right hand side.
1039 */
1040 public JCStatement Assignment(Symbol v, JCExpression rhs) {
1041 return Exec(Assign(Ident(v), rhs).setType(v.type));
1042 }
1043
1044 /** Construct an index expression from a variable and an expression.
1045 */
1046 public JCArrayAccess Indexed(Symbol v, JCExpression index) {
1047 JCArrayAccess tree = new JCArrayAccess(QualIdent(v), index);
1048 tree.type = ((ArrayType)v.type).elemtype;
1049 return tree;
1050 }
1051
1052 /** Make an attributed type cast expression.
1053 */
1054 public JCTypeCast TypeCast(Type type, JCExpression expr) {
1055 return (JCTypeCast)TypeCast(Type(type), expr).setType(type);
1056 }
1057
1058 /* ***************************************************************************
1059 * Helper methods.
1060 ****************************************************************************/
1061
1062 /** Can given symbol be referred to in unqualified form?
1063 */
1064 boolean isUnqualifiable(Symbol sym) {
1065 if (sym.name == names.empty ||
1066 sym.owner == null ||
1067 sym.owner == syms.rootPackage ||
1068 sym.owner.kind == MTH || sym.owner.kind == VAR) {
1069 return true;
1070 } else if (sym.kind == TYP && toplevel != null) {
1071 Iterator<Symbol> it = toplevel.namedImportScope.getSymbolsByName(sym.name).iterator();
1072 if (it.hasNext()) {
1073 Symbol s = it.next();
1074 return
1075 s == sym &&
1076 !it.hasNext();
1077 }
1078 it = toplevel.packge.members().getSymbolsByName(sym.name).iterator();
1079 if (it.hasNext()) {
1080 Symbol s = it.next();
1081 return
1082 s == sym &&
1083 !it.hasNext();
1084 }
1085 it = toplevel.starImportScope.getSymbolsByName(sym.name).iterator();
1086 if (it.hasNext()) {
1087 Symbol s = it.next();
1088 return
1089 s == sym &&
1090 !it.hasNext();
1091 }
1092 }
1093 return false;
1094 }
1095
1096 /** The name of synthetic parameter number `i'.
1097 */
1098 public Name paramName(int i) { return names.fromString("x" + i); }
1099
1100 /** The name of synthetic type parameter number `i'.
1101 */
1102 public Name typaramName(int i) { return names.fromString("A" + i); }
1103 }