1 /*
2 * Copyright (c) 1999, 2021, 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.tools.javac.code.*;
33 import com.sun.tools.javac.code.Attribute.UnresolvedClass;
34 import com.sun.tools.javac.code.Symbol.*;
35 import com.sun.tools.javac.code.Type.*;
36 import com.sun.tools.javac.util.*;
37 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
38
39 import com.sun.tools.javac.tree.JCTree.*;
40
41 import static com.sun.tools.javac.code.Flags.*;
42 import static com.sun.tools.javac.code.Kinds.Kind.*;
43 import static com.sun.tools.javac.code.TypeTag.*;
44
45 /** Factory class for trees.
46 *
47 * <p><b>This is NOT part of any supported API.
48 * If you write code that depends on this, you do so at your own risk.
49 * This code and its internal interfaces are subject to change or
50 * deletion without notice.</b>
51 */
52 public class TreeMaker implements JCTree.Factory {
53
54 /** The context key for the tree factory. */
55 protected static final Context.Key<TreeMaker> treeMakerKey = new Context.Key<>();
56
57 /** Get the TreeMaker instance. */
58 public static TreeMaker instance(Context context) {
59 TreeMaker instance = context.get(treeMakerKey);
60 if (instance == null)
61 instance = new TreeMaker(context);
62 return instance;
63 }
64
65 /** The position at which subsequent trees will be created.
66 */
67 public int pos = Position.NOPOS;
68
69 /** The toplevel tree to which created trees belong.
70 */
71 public JCCompilationUnit toplevel;
72
73 /** The current name table. */
74 Names names;
75
76 Types types;
77
78 /** The current symbol table. */
79 Symtab syms;
80
81 /** Create a tree maker with null toplevel and NOPOS as initial position.
82 */
83 protected TreeMaker(Context context) {
84 context.put(treeMakerKey, this);
85 this.pos = Position.NOPOS;
86 this.toplevel = null;
87 this.names = Names.instance(context);
88 this.syms = Symtab.instance(context);
89 this.types = Types.instance(context);
90 }
91
92 /** Create a tree maker with a given toplevel and FIRSTPOS as initial position.
93 */
94 protected TreeMaker(JCCompilationUnit toplevel, Names names, Types types, Symtab syms) {
95 this.pos = Position.FIRSTPOS;
96 this.toplevel = toplevel;
97 this.names = names;
98 this.types = types;
99 this.syms = syms;
100 }
101
102 /** Create a new tree maker for a given toplevel.
103 */
104 public TreeMaker forToplevel(JCCompilationUnit toplevel) {
105 return new TreeMaker(toplevel, names, types, syms);
106 }
107
108 /** Reassign current position.
109 */
110 public TreeMaker at(int pos) {
111 this.pos = pos;
112 return this;
113 }
114
115 /** Reassign current position.
116 */
117 public TreeMaker at(DiagnosticPosition pos) {
118 this.pos = (pos == null ? Position.NOPOS : pos.getStartPosition());
119 return this;
120 }
121
122 /**
123 * Create given tree node at current position.
124 * @param defs a list of PackageDef, ClassDef, Import, and Skip
125 */
126 public JCCompilationUnit TopLevel(List<JCTree> defs) {
127 for (JCTree node : defs)
128 Assert.check(node instanceof JCClassDecl
129 || node instanceof JCPackageDecl
130 || node instanceof JCImport
131 || node instanceof JCModuleDecl
132 || node instanceof JCSkip
133 || node instanceof JCErroneous
134 || (node instanceof JCExpressionStatement expressionStatement
135 && expressionStatement.expr instanceof JCErroneous),
136 () -> node.getClass().getSimpleName());
137 JCCompilationUnit tree = new JCCompilationUnit(defs);
138 tree.pos = pos;
139 return tree;
140 }
141
142 public JCPackageDecl PackageDecl(List<JCAnnotation> annotations,
143 JCExpression pid) {
144 Assert.checkNonNull(annotations);
145 Assert.checkNonNull(pid);
146 JCPackageDecl tree = new JCPackageDecl(annotations, pid);
147 tree.pos = pos;
148 return tree;
149 }
150
151 public JCImport Import(JCTree qualid, boolean importStatic) {
152 JCImport tree = new JCImport(qualid, importStatic);
153 tree.pos = pos;
154 return tree;
155 }
156
157 public JCClassDecl ClassDef(JCModifiers mods,
158 Name name,
159 List<JCTypeParameter> typarams,
160 JCExpression extending,
161 List<JCExpression> implementing,
162 List<JCTree> defs)
163 {
164 return ClassDef(mods, name, typarams, extending, implementing, List.nil(), defs);
165 }
166
167 public JCClassDecl ClassDef(JCModifiers mods,
168 Name name,
169 List<JCTypeParameter> typarams,
170 JCExpression extending,
171 List<JCExpression> implementing,
172 List<JCExpression> permitting,
173 List<JCTree> defs)
174 {
175 JCClassDecl tree = new JCClassDecl(mods,
176 name,
177 typarams,
178 extending,
179 implementing,
180 permitting,
181 defs,
182 null);
183 tree.pos = pos;
184 return tree;
185 }
186
187 public JCMethodDecl MethodDef(JCModifiers mods,
188 Name name,
189 JCExpression restype,
190 List<JCTypeParameter> typarams,
191 List<JCVariableDecl> params,
192 List<JCExpression> thrown,
193 JCBlock body,
194 JCExpression defaultValue) {
195 return MethodDef(
196 mods, name, restype, typarams, null, params,
197 thrown, body, defaultValue);
198 }
199
200 public JCMethodDecl MethodDef(JCModifiers mods,
201 Name name,
202 JCExpression restype,
203 List<JCTypeParameter> typarams,
204 JCVariableDecl recvparam,
205 List<JCVariableDecl> params,
206 List<JCExpression> thrown,
207 JCBlock body,
208 JCExpression defaultValue)
209 {
210 JCMethodDecl tree = new JCMethodDecl(mods,
211 name,
212 restype,
213 typarams,
214 recvparam,
215 params,
216 thrown,
217 body,
218 defaultValue,
219 null);
220 tree.pos = pos;
221 return tree;
222 }
223
224 public JCVariableDecl VarDef(JCModifiers mods, Name name, JCExpression vartype, JCExpression init) {
225 JCVariableDecl tree = new JCVariableDecl(mods, name, vartype, init, null);
226 tree.pos = pos;
227 return tree;
228 }
229
230 public JCVariableDecl VarDef(JCModifiers mods, Name name, JCExpression vartype, JCExpression init, boolean declaredUsingVar) {
231 JCVariableDecl tree = new JCVariableDecl(mods, name, vartype, init, null, declaredUsingVar);
232 tree.pos = pos;
233 return tree;
234 }
235
236 public JCVariableDecl ReceiverVarDef(JCModifiers mods, JCExpression name, JCExpression vartype) {
237 JCVariableDecl tree = new JCVariableDecl(mods, name, vartype);
238 tree.pos = pos;
239 return tree;
240 }
241
242 public JCSkip Skip() {
243 JCSkip tree = new JCSkip();
244 tree.pos = pos;
245 return tree;
246 }
247
248 public JCBlock Block(long flags, List<JCStatement> stats) {
249 JCBlock tree = new JCBlock(flags, stats);
250 tree.pos = pos;
251 return tree;
252 }
253
254 public JCDoWhileLoop DoLoop(JCStatement body, JCExpression cond) {
255 JCDoWhileLoop tree = new JCDoWhileLoop(body, cond);
256 tree.pos = pos;
257 return tree;
258 }
259
260 public JCWhileLoop WhileLoop(JCExpression cond, JCStatement body) {
261 JCWhileLoop tree = new JCWhileLoop(cond, body);
262 tree.pos = pos;
263 return tree;
264 }
265
266 public JCWithField WithField(JCExpression field, JCExpression value) {
267 JCWithField tree = new JCWithField(field, value);
268 tree.pos = pos;
269 return tree;
270 }
271
272 public JCForLoop ForLoop(List<JCStatement> init,
273 JCExpression cond,
274 List<JCExpressionStatement> step,
275 JCStatement body)
276 {
277 JCForLoop tree = new JCForLoop(init, cond, step, body);
278 tree.pos = pos;
279 return tree;
280 }
281
282 public JCEnhancedForLoop ForeachLoop(JCVariableDecl var, JCExpression expr, JCStatement body) {
283 JCEnhancedForLoop tree = new JCEnhancedForLoop(var, expr, body);
284 tree.pos = pos;
285 return tree;
286 }
287
288 public JCLabeledStatement Labelled(Name label, JCStatement body) {
289 JCLabeledStatement tree = new JCLabeledStatement(label, body);
290 tree.pos = pos;
291 return tree;
292 }
293
294 public JCSwitch Switch(JCExpression selector, List<JCCase> cases) {
295 JCSwitch tree = new JCSwitch(selector, cases);
296 tree.pos = pos;
297 return tree;
298 }
299
300 public JCCase Case(CaseTree.CaseKind caseKind, List<JCCaseLabel> labels,
301 List<JCStatement> stats, JCTree body) {
302 JCCase tree = new JCCase(caseKind, labels, stats, body);
303 tree.pos = pos;
304 return tree;
305 }
306
307 public JCDefaultValue DefaultValue(JCExpression type) {
308 JCDefaultValue tree = new JCDefaultValue(type);
309 tree.pos = pos;
310 return tree;
311 }
312
313 public JCSwitchExpression SwitchExpression(JCExpression selector, List<JCCase> cases) {
314 JCSwitchExpression tree = new JCSwitchExpression(selector, cases);
315 tree.pos = pos;
316 return tree;
317 }
318
319 public JCSynchronized Synchronized(JCExpression lock, JCBlock body) {
320 JCSynchronized tree = new JCSynchronized(lock, body);
321 tree.pos = pos;
322 return tree;
323 }
324
325 public JCTry Try(JCBlock body, List<JCCatch> catchers, JCBlock finalizer) {
326 return Try(List.nil(), body, catchers, finalizer);
327 }
328
329 public JCTry Try(List<JCTree> resources,
330 JCBlock body,
331 List<JCCatch> catchers,
332 JCBlock finalizer) {
333 JCTry tree = new JCTry(resources, body, catchers, finalizer);
334 tree.pos = pos;
335 return tree;
336 }
337
338 public JCCatch Catch(JCVariableDecl param, JCBlock body) {
339 JCCatch tree = new JCCatch(param, body);
340 tree.pos = pos;
341 return tree;
342 }
343
344 public JCConditional Conditional(JCExpression cond,
345 JCExpression thenpart,
346 JCExpression elsepart)
347 {
348 JCConditional tree = new JCConditional(cond, thenpart, elsepart);
349 tree.pos = pos;
350 return tree;
351 }
352
353 public JCIf If(JCExpression cond, JCStatement thenpart, JCStatement elsepart) {
354 JCIf tree = new JCIf(cond, thenpart, elsepart);
355 tree.pos = pos;
356 return tree;
357 }
358
359 public JCExpressionStatement Exec(JCExpression expr) {
360 JCExpressionStatement tree = new JCExpressionStatement(expr);
361 tree.pos = pos;
362 return tree;
363 }
364
365 public JCBreak Break(Name label) {
366 JCBreak tree = new JCBreak(label, null);
367 tree.pos = pos;
368 return tree;
369 }
370
371 public JCYield Yield(JCExpression value) {
372 JCYield tree = new JCYield(value, null);
373 tree.pos = pos;
374 return tree;
375 }
376
377 public JCContinue Continue(Name label) {
378 JCContinue tree = new JCContinue(label, null);
379 tree.pos = pos;
380 return tree;
381 }
382
383 public JCReturn Return(JCExpression expr) {
384 JCReturn tree = new JCReturn(expr);
385 tree.pos = pos;
386 return tree;
387 }
388
389 public JCThrow Throw(JCExpression expr) {
390 JCThrow tree = new JCThrow(expr);
391 tree.pos = pos;
392 return tree;
393 }
394
395 public JCAssert Assert(JCExpression cond, JCExpression detail) {
396 JCAssert tree = new JCAssert(cond, detail);
397 tree.pos = pos;
398 return tree;
399 }
400
401 public JCMethodInvocation Apply(List<JCExpression> typeargs,
402 JCExpression fn,
403 List<JCExpression> args)
404 {
405 JCMethodInvocation tree = new JCMethodInvocation(typeargs, fn, args);
406 tree.pos = pos;
407 return tree;
408 }
409
410 public JCNewClass NewClass(JCExpression encl,
411 List<JCExpression> typeargs,
412 JCExpression clazz,
413 List<JCExpression> args,
414 JCClassDecl def)
415 {
416 return SpeculativeNewClass(encl, typeargs, clazz, args, def, false);
417 }
418
419 public JCNewClass SpeculativeNewClass(JCExpression encl,
420 List<JCExpression> typeargs,
421 JCExpression clazz,
422 List<JCExpression> args,
423 JCClassDecl def,
424 boolean classDefRemoved)
425 {
426 JCNewClass tree = classDefRemoved ?
427 new JCNewClass(encl, typeargs, clazz, args, def) {
428 @Override
429 public boolean classDeclRemoved() {
430 return true;
431 }
432 } :
433 new JCNewClass(encl, typeargs, clazz, args, def);
434 tree.pos = pos;
435 return tree;
436 }
437
438 public JCNewArray NewArray(JCExpression elemtype,
439 List<JCExpression> dims,
440 List<JCExpression> elems)
441 {
442 JCNewArray tree = new JCNewArray(elemtype, dims, elems);
443 tree.pos = pos;
444 return tree;
445 }
446
447 public JCLambda Lambda(List<JCVariableDecl> params,
448 JCTree body)
449 {
450 JCLambda tree = new JCLambda(params, body);
451 tree.pos = pos;
452 return tree;
453 }
454
455 public JCParens Parens(JCExpression expr) {
456 JCParens tree = new JCParens(expr);
457 tree.pos = pos;
458 return tree;
459 }
460
461 public JCAssign Assign(JCExpression lhs, JCExpression rhs) {
462 JCAssign tree = new JCAssign(lhs, rhs);
463 tree.pos = pos;
464 return tree;
465 }
466
467 public JCAssignOp Assignop(JCTree.Tag opcode, JCTree lhs, JCTree rhs) {
468 JCAssignOp tree = new JCAssignOp(opcode, lhs, rhs, null);
469 tree.pos = pos;
470 return tree;
471 }
472
473 public JCUnary Unary(JCTree.Tag opcode, JCExpression arg) {
474 JCUnary tree = new JCUnary(opcode, arg);
475 tree.pos = pos;
476 return tree;
477 }
478
479 public JCBinary Binary(JCTree.Tag opcode, JCExpression lhs, JCExpression rhs) {
480 JCBinary tree = new JCBinary(opcode, lhs, rhs, null);
481 tree.pos = pos;
482 return tree;
483 }
484
485 public JCTypeCast TypeCast(JCTree clazz, JCExpression expr) {
486 JCTypeCast tree = new JCTypeCast(clazz, expr);
487 tree.pos = pos;
488 return tree;
489 }
490
491 public JCInstanceOf TypeTest(JCExpression expr, JCTree clazz) {
492 JCInstanceOf tree = new JCInstanceOf(expr, clazz);
493 tree.pos = pos;
494 return tree;
495 }
496
497 public JCBindingPattern BindingPattern(JCVariableDecl var) {
498 JCBindingPattern tree = new JCBindingPattern(var);
499 tree.pos = pos;
500 return tree;
501 }
502
503 public JCDefaultCaseLabel DefaultCaseLabel() {
504 JCDefaultCaseLabel tree = new JCDefaultCaseLabel();
505 tree.pos = pos;
506 return tree;
507 }
508
509 public JCParenthesizedPattern ParenthesizedPattern(JCPattern pattern) {
510 JCParenthesizedPattern tree = new JCParenthesizedPattern(pattern);
511 tree.pos = pos;
512 return tree;
513 }
514
515 public JCGuardPattern GuardPattern(JCPattern guardedPattern, JCExpression expr) {
516 JCGuardPattern tree = new JCGuardPattern(guardedPattern, expr);
517 tree.pos = pos;
518 return tree;
519 }
520
521 public JCArrayAccess Indexed(JCExpression indexed, JCExpression index) {
522 JCArrayAccess tree = new JCArrayAccess(indexed, index);
523 tree.pos = pos;
524 return tree;
525 }
526
527 public JCFieldAccess Select(JCExpression selected, Name selector) {
528 JCFieldAccess tree = new JCFieldAccess(selected, selector, null);
529 tree.pos = pos;
530 return tree;
531 }
532
533 public JCMemberReference Reference(JCMemberReference.ReferenceMode mode, Name name,
534 JCExpression expr, List<JCExpression> typeargs) {
535 JCMemberReference tree = new JCMemberReference(mode, name, expr, typeargs);
536 tree.pos = pos;
537 return tree;
538 }
539
540 public JCIdent Ident(Name name) {
541 JCIdent tree = new JCIdent(name, null);
542 tree.pos = pos;
543 return tree;
544 }
545
546 public JCLiteral Literal(TypeTag tag, Object value) {
547 JCLiteral tree = new JCLiteral(tag, value);
548 tree.pos = pos;
549 return tree;
550 }
551
552 public JCPrimitiveTypeTree TypeIdent(TypeTag typetag) {
553 JCPrimitiveTypeTree tree = new JCPrimitiveTypeTree(typetag);
554 tree.pos = pos;
555 return tree;
556 }
557
558 public JCArrayTypeTree TypeArray(JCExpression elemtype) {
559 JCArrayTypeTree tree = new JCArrayTypeTree(elemtype);
560 tree.pos = pos;
561 return tree;
562 }
563
564 public JCTypeApply TypeApply(JCExpression clazz, List<JCExpression> arguments) {
565 JCTypeApply tree = new JCTypeApply(clazz, arguments);
566 tree.pos = pos;
567 return tree;
568 }
569
570 public JCTypeUnion TypeUnion(List<JCExpression> components) {
571 JCTypeUnion tree = new JCTypeUnion(components);
572 tree.pos = pos;
573 return tree;
574 }
575
576 public JCTypeIntersection TypeIntersection(List<JCExpression> components) {
577 JCTypeIntersection tree = new JCTypeIntersection(components);
578 tree.pos = pos;
579 return tree;
580 }
581
582 public JCTypeParameter TypeParameter(Name name, List<JCExpression> bounds) {
583 return TypeParameter(name, bounds, List.nil());
584 }
585
586 public JCTypeParameter TypeParameter(Name name, List<JCExpression> bounds, List<JCAnnotation> annos) {
587 JCTypeParameter tree = new JCTypeParameter(name, bounds, annos);
588 tree.pos = pos;
589 return tree;
590 }
591
592 public JCWildcard Wildcard(TypeBoundKind kind, JCTree type) {
593 JCWildcard tree = new JCWildcard(kind, type);
594 tree.pos = pos;
595 return tree;
596 }
597
598 public TypeBoundKind TypeBoundKind(BoundKind kind) {
599 TypeBoundKind tree = new TypeBoundKind(kind);
600 tree.pos = pos;
601 return tree;
602 }
603
604 public JCAnnotation Annotation(JCTree annotationType, List<JCExpression> args) {
605 JCAnnotation tree = new JCAnnotation(Tag.ANNOTATION, annotationType, args);
606 tree.pos = pos;
607 return tree;
608 }
609
610 public JCAnnotation TypeAnnotation(JCTree annotationType, List<JCExpression> args) {
611 JCAnnotation tree = new JCAnnotation(Tag.TYPE_ANNOTATION, annotationType, args);
612 tree.pos = pos;
613 return tree;
614 }
615
616 public JCModifiers Modifiers(long flags, List<JCAnnotation> annotations) {
617 JCModifiers tree = new JCModifiers(flags, annotations);
618 boolean noFlags = (flags & (Flags.ModifierFlags | Flags.ANNOTATION)) == 0;
619 tree.pos = (noFlags && annotations.isEmpty()) ? Position.NOPOS : pos;
620 return tree;
621 }
622
623 public JCModifiers Modifiers(long flags) {
624 return Modifiers(flags, List.nil());
625 }
626
627 @Override
628 public JCModuleDecl ModuleDef(JCModifiers mods, ModuleKind kind,
629 JCExpression qualid, List<JCDirective> directives) {
630 JCModuleDecl tree = new JCModuleDecl(mods, kind, qualid, directives);
631 tree.pos = pos;
632 return tree;
633 }
634
635 @Override
636 public JCExports Exports(JCExpression qualId, List<JCExpression> moduleNames) {
637 JCExports tree = new JCExports(qualId, moduleNames);
638 tree.pos = pos;
639 return tree;
640 }
641
642 @Override
643 public JCOpens Opens(JCExpression qualId, List<JCExpression> moduleNames) {
644 JCOpens tree = new JCOpens(qualId, moduleNames);
645 tree.pos = pos;
646 return tree;
647 }
648
649 @Override
650 public JCProvides Provides(JCExpression serviceName, List<JCExpression> implNames) {
651 JCProvides tree = new JCProvides(serviceName, implNames);
652 tree.pos = pos;
653 return tree;
654 }
655
656 @Override
657 public JCRequires Requires(boolean isTransitive, boolean isStaticPhase, JCExpression qualId) {
658 JCRequires tree = new JCRequires(isTransitive, isStaticPhase, qualId);
659 tree.pos = pos;
660 return tree;
661 }
662
663 @Override
664 public JCUses Uses(JCExpression qualId) {
665 JCUses tree = new JCUses(qualId);
666 tree.pos = pos;
667 return tree;
668 }
669
670 public JCAnnotatedType AnnotatedType(List<JCAnnotation> annotations, JCExpression underlyingType) {
671 JCAnnotatedType tree = new JCAnnotatedType(annotations, underlyingType);
672 tree.pos = pos;
673 return tree;
674 }
675
676 public JCErroneous Erroneous() {
677 return Erroneous(List.nil());
678 }
679
680 public JCErroneous Erroneous(List<? extends JCTree> errs) {
681 JCErroneous tree = new JCErroneous(errs);
682 tree.pos = pos;
683 return tree;
684 }
685
686 public LetExpr LetExpr(List<JCStatement> defs, JCExpression expr) {
687 LetExpr tree = new LetExpr(defs, expr);
688 tree.pos = pos;
689 return tree;
690 }
691
692 /* ***************************************************************************
693 * Derived building blocks.
694 ****************************************************************************/
695
696 public JCClassDecl AnonymousClassDef(JCModifiers mods,
697 List<JCTree> defs)
698 {
699 return ClassDef(mods,
700 names.empty,
701 List.nil(),
702 null,
703 List.nil(),
704 defs);
705 }
706
707 public LetExpr LetExpr(JCVariableDecl def, JCExpression expr) {
708 LetExpr tree = new LetExpr(List.of(def), expr);
709 tree.pos = pos;
710 return tree;
711 }
712
713 /** Create an identifier from a symbol.
714 */
715 public JCIdent Ident(Symbol sym) {
716 return (JCIdent)new JCIdent((sym.name != names.empty)
717 ? sym.name
718 : sym.flatName(), sym)
719 .setPos(pos)
720 .setType(sym.type);
721 }
722
723 /** Create a selection node from a qualifier tree and a symbol.
724 * @param base The qualifier tree.
725 */
726 public JCExpression Select(JCExpression base, Symbol sym) {
727 return new JCFieldAccess(base, sym.name, sym).setPos(pos).setType(sym.type);
728 }
729
730 /** Create a qualified identifier from a symbol, adding enough qualifications
731 * to make the reference unique.
732 */
733 public JCExpression QualIdent(Symbol sym) {
734 return isUnqualifiable(sym)
735 ? Ident(sym)
736 : Select(QualIdent(sym.owner), sym);
737 }
738
739 /** Create an identifier that refers to the variable declared in given variable
740 * declaration.
741 */
742 public JCExpression Ident(JCVariableDecl param) {
743 return Ident(param.sym);
744 }
745
746 /** Create a list of identifiers referring to the variables declared
747 * in given list of variable declarations.
748 */
749 public List<JCExpression> Idents(List<JCVariableDecl> params) {
750 ListBuffer<JCExpression> ids = new ListBuffer<>();
751 for (List<JCVariableDecl> l = params; l.nonEmpty(); l = l.tail)
752 ids.append(Ident(l.head));
753 return ids.toList();
754 }
755
756 /** Create a tree representing `this', given its type.
757 */
758 public JCExpression This(Type t) {
759 return Ident(new VarSymbol(FINAL, names._this, t, t.tsym));
760 }
761
762 /** Create a tree representing qualified `this' given its type
763 */
764 public JCExpression QualThis(Type t) {
765 return Select(Type(t), new VarSymbol(FINAL, names._this, t, t.tsym));
766 }
767
768 /** Create a tree representing a class literal.
769 */
770 public JCExpression ClassLiteral(ClassSymbol clazz) {
771 return ClassLiteral(clazz.type);
772 }
773
774 /** Create a tree representing a class literal.
775 */
776 public JCExpression ClassLiteral(Type t) {
777 VarSymbol lit = new VarSymbol(STATIC | PUBLIC | FINAL,
778 names._class,
779 t,
780 t.tsym);
781 return Select(Type(t), lit);
782 }
783
784 /** Create a tree representing `super', given its type and owner.
785 */
786 public JCIdent Super(Type t, TypeSymbol owner) {
787 return Ident(new VarSymbol(FINAL, names._super, t, owner));
788 }
789
790 /**
791 * Create a method invocation from a method tree and a list of
792 * argument trees.
793 */
794 public JCMethodInvocation App(JCExpression meth, List<JCExpression> args) {
795 return Apply(null, meth, args).setType(meth.type.getReturnType());
796 }
797
798 /**
799 * Create a no-arg method invocation from a method tree
800 */
801 public JCMethodInvocation App(JCExpression meth) {
802 return Apply(null, meth, List.nil()).setType(meth.type.getReturnType());
803 }
804
805 /** Create a method invocation from a method tree and a list of argument trees.
806 */
807 public JCExpression Create(Symbol ctor, List<JCExpression> args) {
808 Type t = ctor.owner.erasure(types);
809 JCNewClass newclass = NewClass(null, null, Type(t), args, null);
810 newclass.constructor = ctor;
811 newclass.setType(t);
812 return newclass;
813 }
814
815 /** Create a tree representing given type.
816 */
817 public JCExpression Type(Type t) {
818 if (t == null) return null;
819 JCExpression tp;
820 switch (t.getTag()) {
821 case BYTE: case CHAR: case SHORT: case INT: case LONG: case FLOAT:
822 case DOUBLE: case BOOLEAN: case VOID:
823 tp = TypeIdent(t.getTag());
824 break;
825 case TYPEVAR:
826 tp = Ident(t.tsym);
827 break;
828 case WILDCARD: {
829 WildcardType a = ((WildcardType) t);
830 tp = Wildcard(TypeBoundKind(a.kind), a.kind == BoundKind.UNBOUND ? null : Type(a.type));
831 break;
832 }
833 case CLASS:
834 switch (t.getKind()) {
835 case UNION: {
836 UnionClassType tu = (UnionClassType)t;
837 ListBuffer<JCExpression> la = new ListBuffer<>();
838 for (Type ta : tu.getAlternativeTypes()) {
839 la.add(Type(ta));
840 }
841 tp = TypeUnion(la.toList());
842 break;
843 }
844 case INTERSECTION: {
845 IntersectionClassType it = (IntersectionClassType)t;
846 ListBuffer<JCExpression> la = new ListBuffer<>();
847 for (Type ta : it.getExplicitComponents()) {
848 la.add(Type(ta));
849 }
850 tp = TypeIntersection(la.toList());
851 break;
852 }
853 default: {
854 if (t.isReferenceProjection()) {
855 // For parameterized types, we want V.ref<A1 ... An> not V<A1 ... An>.ref
856 JCExpression vp = Type(t.valueProjection());
857 if (vp.hasTag(Tag.TYPEAPPLY)) {
858 // vp now is V<A1 ... An>, build V.ref<A1 ... An>
859 JCFieldAccess f = (JCFieldAccess) Select(((JCTypeApply) vp).clazz, t.tsym);
860 f.name = names.ref;
861 tp = TypeApply(f, ((JCTypeApply) vp).arguments);
862 } else {
863 JCFieldAccess f = (JCFieldAccess) Select(vp, t.tsym);
864 f.name = names.ref;
865 tp = f;
866 }
867 } else {
868 Type outer = t.getEnclosingType();
869 JCExpression clazz = outer.hasTag(CLASS) && t.tsym.owner.kind == TYP
870 ? Select(Type(outer), t.tsym)
871 : QualIdent(t.tsym);
872 tp = t.getTypeArguments().isEmpty()
873 ? clazz
874 : TypeApply(clazz, Types(t.getTypeArguments()));
875 }
876 break;
877 }
878 }
879 break;
880 case ARRAY:
881 tp = TypeArray(Type(types.elemtype(t)));
882 break;
883 case ERROR:
884 tp = TypeIdent(ERROR);
885 break;
886 default:
887 throw new AssertionError("unexpected type: " + t);
888 }
889 return tp.setType(t);
890 }
891
892 /** Create a list of trees representing given list of types.
893 */
894 public List<JCExpression> Types(List<Type> ts) {
895 ListBuffer<JCExpression> lb = new ListBuffer<>();
896 for (List<Type> l = ts; l.nonEmpty(); l = l.tail)
897 lb.append(Type(l.head));
898 return lb.toList();
899 }
900
901 /** Create a variable definition from a variable symbol and an initializer
902 * expression.
903 */
904 public JCVariableDecl VarDef(VarSymbol v, JCExpression init) {
905 return (JCVariableDecl)
906 new JCVariableDecl(
907 Modifiers(v.flags(), Annotations(v.getRawAttributes())),
908 v.name,
909 Type(v.type),
910 init,
911 v).setPos(pos).setType(v.type);
912 }
913
914 /** Create annotation trees from annotations.
915 */
916 public List<JCAnnotation> Annotations(List<Attribute.Compound> attributes) {
917 if (attributes == null) return List.nil();
918 ListBuffer<JCAnnotation> result = new ListBuffer<>();
919 for (List<Attribute.Compound> i = attributes; i.nonEmpty(); i=i.tail) {
920 Attribute a = i.head;
921 result.append(Annotation(a));
922 }
923 return result.toList();
924 }
925
926 public JCLiteral Literal(Object value) {
927 JCLiteral result = null;
928 if (value instanceof String) {
929 result = Literal(CLASS, value).
930 setType(syms.stringType.constType(value));
931 } else if (value instanceof Integer) {
932 result = Literal(INT, value).
933 setType(syms.intType.constType(value));
934 } else if (value instanceof Long) {
935 result = Literal(LONG, value).
936 setType(syms.longType.constType(value));
937 } else if (value instanceof Byte) {
938 result = Literal(BYTE, value).
939 setType(syms.byteType.constType(value));
940 } else if (value instanceof Character charVal) {
941 int v = charVal.toString().charAt(0);
942 result = Literal(CHAR, v).
943 setType(syms.charType.constType(v));
944 } else if (value instanceof Double) {
945 result = Literal(DOUBLE, value).
946 setType(syms.doubleType.constType(value));
947 } else if (value instanceof Float) {
948 result = Literal(FLOAT, value).
949 setType(syms.floatType.constType(value));
950 } else if (value instanceof Short) {
951 result = Literal(SHORT, value).
952 setType(syms.shortType.constType(value));
953 } else if (value instanceof Boolean boolVal) {
954 int v = boolVal ? 1 : 0;
955 result = Literal(BOOLEAN, v).
956 setType(syms.booleanType.constType(v));
957 } else {
958 throw new AssertionError(value);
959 }
960 return result;
961 }
962
963 class AnnotationBuilder implements Attribute.Visitor {
964 JCExpression result = null;
965 public void visitConstant(Attribute.Constant v) {
966 result = Literal(v.type.getTag(), v.value);
967 }
968 public void visitClass(Attribute.Class clazz) {
969 result = ClassLiteral(clazz.classType).setType(syms.classType);
970 }
971 public void visitEnum(Attribute.Enum e) {
972 result = QualIdent(e.value);
973 }
974 public void visitError(Attribute.Error e) {
975 if (e instanceof UnresolvedClass unresolvedClass) {
976 result = ClassLiteral(unresolvedClass.classType).setType(syms.classType);
977 } else {
978 result = Erroneous();
979 }
980 }
981 public void visitCompound(Attribute.Compound compound) {
982 if (compound instanceof Attribute.TypeCompound typeCompound) {
983 result = visitTypeCompoundInternal(typeCompound);
984 } else {
985 result = visitCompoundInternal(compound);
986 }
987 }
988 public JCAnnotation visitCompoundInternal(Attribute.Compound compound) {
989 ListBuffer<JCExpression> args = new ListBuffer<>();
990 for (List<Pair<Symbol.MethodSymbol,Attribute>> values = compound.values; values.nonEmpty(); values=values.tail) {
991 Pair<MethodSymbol,Attribute> pair = values.head;
992 JCExpression valueTree = translate(pair.snd);
993 args.append(Assign(Ident(pair.fst), valueTree).setType(valueTree.type));
994 }
995 return Annotation(Type(compound.type), args.toList());
996 }
997 public JCAnnotation visitTypeCompoundInternal(Attribute.TypeCompound compound) {
998 ListBuffer<JCExpression> args = new ListBuffer<>();
999 for (List<Pair<Symbol.MethodSymbol,Attribute>> values = compound.values; values.nonEmpty(); values=values.tail) {
1000 Pair<MethodSymbol,Attribute> pair = values.head;
1001 JCExpression valueTree = translate(pair.snd);
1002 args.append(Assign(Ident(pair.fst), valueTree).setType(valueTree.type));
1003 }
1004 return TypeAnnotation(Type(compound.type), args.toList());
1005 }
1006 public void visitArray(Attribute.Array array) {
1007 ListBuffer<JCExpression> elems = new ListBuffer<>();
1008 for (int i = 0; i < array.values.length; i++)
1009 elems.append(translate(array.values[i]));
1010 result = NewArray(null, List.nil(), elems.toList()).setType(array.type);
1011 }
1012 JCExpression translate(Attribute a) {
1013 a.accept(this);
1014 return result;
1015 }
1016 JCAnnotation translate(Attribute.Compound a) {
1017 return visitCompoundInternal(a);
1018 }
1019 JCAnnotation translate(Attribute.TypeCompound a) {
1020 return visitTypeCompoundInternal(a);
1021 }
1022 }
1023
1024 AnnotationBuilder annotationBuilder = new AnnotationBuilder();
1025
1026 /** Create an annotation tree from an attribute.
1027 */
1028 public JCAnnotation Annotation(Attribute a) {
1029 return annotationBuilder.translate((Attribute.Compound)a);
1030 }
1031
1032 public JCAnnotation TypeAnnotation(Attribute a) {
1033 return annotationBuilder.translate((Attribute.TypeCompound) a);
1034 }
1035
1036 /** Create a method definition from a method symbol and a method body.
1037 */
1038 public JCMethodDecl MethodDef(MethodSymbol m, JCBlock body) {
1039 return MethodDef(m, m.type, body);
1040 }
1041
1042 /** Create a method definition from a method symbol, method type
1043 * and a method body.
1044 */
1045 public JCMethodDecl MethodDef(MethodSymbol m, Type mtype, JCBlock body) {
1046 return (JCMethodDecl)
1047 new JCMethodDecl(
1048 Modifiers(m.flags(), Annotations(m.getRawAttributes())),
1049 m.name,
1050 m.name != names.init ? Type(mtype.getReturnType()) : null,
1051 TypeParams(mtype.getTypeArguments()),
1052 null, // receiver type
1053 Params(mtype.getParameterTypes(), m),
1054 Types(mtype.getThrownTypes()),
1055 body,
1056 null,
1057 m).setPos(pos).setType(mtype);
1058 }
1059
1060 /** Create a type parameter tree from its name and type.
1061 */
1062 public JCTypeParameter TypeParam(Name name, TypeVar tvar) {
1063 return (JCTypeParameter)
1064 TypeParameter(name, Types(types.getBounds(tvar))).setPos(pos).setType(tvar);
1065 }
1066
1067 /** Create a list of type parameter trees from a list of type variables.
1068 */
1069 public List<JCTypeParameter> TypeParams(List<Type> typarams) {
1070 ListBuffer<JCTypeParameter> tparams = new ListBuffer<>();
1071 for (List<Type> l = typarams; l.nonEmpty(); l = l.tail)
1072 tparams.append(TypeParam(l.head.tsym.name, (TypeVar)l.head));
1073 return tparams.toList();
1074 }
1075
1076 /** Create a value parameter tree from its name, type, and owner.
1077 */
1078 public JCVariableDecl Param(Name name, Type argtype, Symbol owner) {
1079 return VarDef(new VarSymbol(PARAMETER, name, argtype, owner), null);
1080 }
1081
1082 /** Create a a list of value parameter trees x0, ..., xn from a list of
1083 * their types and an their owner.
1084 */
1085 public List<JCVariableDecl> Params(List<Type> argtypes, Symbol owner) {
1086 ListBuffer<JCVariableDecl> params = new ListBuffer<>();
1087 MethodSymbol mth = (owner.kind == MTH) ? ((MethodSymbol)owner) : null;
1088 if (mth != null && mth.params != null && argtypes.length() == mth.params.length()) {
1089 for (VarSymbol param : ((MethodSymbol)owner).params)
1090 params.append(VarDef(param, null));
1091 } else {
1092 int i = 0;
1093 for (List<Type> l = argtypes; l.nonEmpty(); l = l.tail)
1094 params.append(Param(paramName(i++), l.head, owner));
1095 }
1096 return params.toList();
1097 }
1098
1099 /** Wrap a method invocation in an expression statement or return statement,
1100 * depending on whether the method invocation expression's type is void.
1101 */
1102 public JCStatement Call(JCExpression apply) {
1103 return apply.type.hasTag(VOID) ? Exec(apply) : Return(apply);
1104 }
1105
1106 /** Construct an assignment from a variable symbol and a right hand side.
1107 */
1108 public JCStatement Assignment(Symbol v, JCExpression rhs) {
1109 return Exec(Assign(Ident(v), rhs).setType(v.type));
1110 }
1111
1112 /** Construct an index expression from a variable and an expression.
1113 */
1114 public JCArrayAccess Indexed(Symbol v, JCExpression index) {
1115 JCArrayAccess tree = new JCArrayAccess(QualIdent(v), index);
1116 tree.type = ((ArrayType)v.type).elemtype;
1117 return tree;
1118 }
1119
1120 /** Make an attributed type cast expression.
1121 */
1122 public JCTypeCast TypeCast(Type type, JCExpression expr) {
1123 return (JCTypeCast)TypeCast(Type(type), expr).setType(type);
1124 }
1125
1126 /* ***************************************************************************
1127 * Helper methods.
1128 ****************************************************************************/
1129
1130 /** Can given symbol be referred to in unqualified form?
1131 */
1132 boolean isUnqualifiable(Symbol sym) {
1133 if (sym.name == names.empty ||
1134 sym.owner == null ||
1135 sym.owner == syms.rootPackage ||
1136 sym.owner.kind == MTH || sym.owner.kind == VAR) {
1137 return true;
1138 } else if (sym.kind == TYP && toplevel != null) {
1139 Iterator<Symbol> it = toplevel.namedImportScope.getSymbolsByName(sym.name).iterator();
1140 if (it.hasNext()) {
1141 Symbol s = it.next();
1142 return
1143 s == sym &&
1144 !it.hasNext();
1145 }
1146 it = toplevel.packge.members().getSymbolsByName(sym.name).iterator();
1147 if (it.hasNext()) {
1148 Symbol s = it.next();
1149 return
1150 s == sym &&
1151 !it.hasNext();
1152 }
1153 it = toplevel.starImportScope.getSymbolsByName(sym.name).iterator();
1154 if (it.hasNext()) {
1155 Symbol s = it.next();
1156 return
1157 s == sym &&
1158 !it.hasNext();
1159 }
1160 }
1161 return false;
1162 }
1163
1164 /** The name of synthetic parameter number `i'.
1165 */
1166 public Name paramName(int i) { return names.fromString("x" + i); }
1167
1168 /** The name of synthetic type parameter number `i'.
1169 */
1170 public Name typaramName(int i) { return names.fromString("A" + i); }
1171 }