1 /*
2 * Copyright (c) 1999, 2018, 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.CaseKind;
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("removal") 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(JCExpression label) {
337 JCBreak tree = new JCBreak(label, null);
338 tree.pos = pos;
339 return tree;
340 }
341
342 public JCContinue Continue(Name label) {
343 JCContinue tree = new JCContinue(label, null);
344 tree.pos = pos;
345 return tree;
346 }
347
348 public JCReturn Return(JCExpression expr) {
349 JCReturn tree = new JCReturn(expr);
350 tree.pos = pos;
351 return tree;
352 }
353
354 public JCThrow Throw(JCExpression expr) {
355 JCThrow tree = new JCThrow(expr);
356 tree.pos = pos;
357 return tree;
358 }
359
360 public JCAssert Assert(JCExpression cond, JCExpression detail) {
361 JCAssert tree = new JCAssert(cond, detail);
362 tree.pos = pos;
363 return tree;
364 }
365
366 public JCMethodInvocation Apply(List<JCExpression> typeargs,
367 JCExpression fn,
368 List<JCExpression> args)
369 {
370 JCMethodInvocation tree = new JCMethodInvocation(typeargs, fn, args);
371 tree.pos = pos;
372 return tree;
373 }
374
375 public JCNewClass NewClass(JCExpression encl,
376 List<JCExpression> typeargs,
377 JCExpression clazz,
378 List<JCExpression> args,
379 JCClassDecl def)
380 {
381 JCNewClass tree = new JCNewClass(encl, typeargs, clazz, args, def);
382 tree.pos = pos;
383 return tree;
384 }
385
386 public JCNewArray NewArray(JCExpression elemtype,
387 List<JCExpression> dims,
388 List<JCExpression> elems)
389 {
390 JCNewArray tree = new JCNewArray(elemtype, dims, elems);
391 tree.pos = pos;
392 return tree;
393 }
394
395 public JCLambda Lambda(List<JCVariableDecl> params,
396 JCTree body)
397 {
398 JCLambda tree = new JCLambda(params, body);
399 tree.pos = pos;
400 return tree;
401 }
402
403 public JCParens Parens(JCExpression expr) {
404 JCParens tree = new JCParens(expr);
405 tree.pos = pos;
406 return tree;
407 }
408
409 public JCAssign Assign(JCExpression lhs, JCExpression rhs) {
410 JCAssign tree = new JCAssign(lhs, rhs);
411 tree.pos = pos;
412 return tree;
413 }
414
415 public JCAssignOp Assignop(JCTree.Tag opcode, JCTree lhs, JCTree rhs) {
416 JCAssignOp tree = new JCAssignOp(opcode, lhs, rhs, null);
417 tree.pos = pos;
418 return tree;
419 }
420
421 public JCUnary Unary(JCTree.Tag opcode, JCExpression arg) {
422 JCUnary tree = new JCUnary(opcode, arg);
423 tree.pos = pos;
424 return tree;
425 }
426
427 public JCBinary Binary(JCTree.Tag opcode, JCExpression lhs, JCExpression rhs) {
428 JCBinary tree = new JCBinary(opcode, lhs, rhs, null);
429 tree.pos = pos;
430 return tree;
431 }
432
433 public JCTypeCast TypeCast(JCTree clazz, JCExpression expr) {
434 JCTypeCast tree = new JCTypeCast(clazz, expr);
435 tree.pos = pos;
436 return tree;
437 }
438
439 public JCInstanceOf TypeTest(JCExpression expr, JCTree clazz) {
440 JCInstanceOf tree = new JCInstanceOf(expr, clazz);
441 tree.pos = pos;
442 return tree;
443 }
444
445 public JCArrayAccess Indexed(JCExpression indexed, JCExpression index) {
446 JCArrayAccess tree = new JCArrayAccess(indexed, index);
447 tree.pos = pos;
448 return tree;
449 }
450
451 public JCFieldAccess Select(JCExpression selected, Name selector) {
452 JCFieldAccess tree = new JCFieldAccess(selected, selector, null);
453 tree.pos = pos;
454 return tree;
455 }
456
457 public JCMemberReference Reference(JCMemberReference.ReferenceMode mode, Name name,
458 JCExpression expr, List<JCExpression> typeargs) {
459 JCMemberReference tree = new JCMemberReference(mode, name, expr, typeargs);
460 tree.pos = pos;
461 return tree;
462 }
463
464 public JCIdent Ident(Name name) {
465 JCIdent tree = new JCIdent(name, null);
466 tree.pos = pos;
467 return tree;
468 }
469
470 public JCLiteral Literal(TypeTag tag, Object value) {
471 JCLiteral tree = new JCLiteral(tag, value);
472 tree.pos = pos;
473 return tree;
474 }
475
476 public JCPrimitiveTypeTree TypeIdent(TypeTag typetag) {
477 JCPrimitiveTypeTree tree = new JCPrimitiveTypeTree(typetag);
478 tree.pos = pos;
479 return tree;
480 }
481
482 public JCArrayTypeTree TypeArray(JCExpression elemtype) {
483 JCArrayTypeTree tree = new JCArrayTypeTree(elemtype);
484 tree.pos = pos;
485 return tree;
486 }
487
488 public JCTypeApply TypeApply(JCExpression clazz, List<JCExpression> arguments) {
489 JCTypeApply tree = new JCTypeApply(clazz, arguments);
490 tree.pos = pos;
491 return tree;
492 }
493
494 public JCTypeUnion TypeUnion(List<JCExpression> components) {
495 JCTypeUnion tree = new JCTypeUnion(components);
496 tree.pos = pos;
497 return tree;
498 }
499
500 public JCTypeIntersection TypeIntersection(List<JCExpression> components) {
501 JCTypeIntersection tree = new JCTypeIntersection(components);
502 tree.pos = pos;
503 return tree;
504 }
505
506 public JCTypeParameter TypeParameter(Name name, List<JCExpression> bounds) {
507 return TypeParameter(name, bounds, List.nil());
508 }
509
510 public JCTypeParameter TypeParameter(Name name, List<JCExpression> bounds, List<JCAnnotation> annos) {
511 JCTypeParameter tree = new JCTypeParameter(name, bounds, annos);
512 tree.pos = pos;
513 return tree;
514 }
515
516 public JCWildcard Wildcard(TypeBoundKind kind, JCTree type) {
517 JCWildcard tree = new JCWildcard(kind, type);
518 tree.pos = pos;
519 return tree;
520 }
521
522 public TypeBoundKind TypeBoundKind(BoundKind kind) {
523 TypeBoundKind tree = new TypeBoundKind(kind);
524 tree.pos = pos;
525 return tree;
526 }
527
528 public JCAnnotation Annotation(JCTree annotationType, List<JCExpression> args) {
529 JCAnnotation tree = new JCAnnotation(Tag.ANNOTATION, annotationType, args);
530 tree.pos = pos;
531 return tree;
532 }
533
534 public JCAnnotation TypeAnnotation(JCTree annotationType, List<JCExpression> args) {
535 JCAnnotation tree = new JCAnnotation(Tag.TYPE_ANNOTATION, annotationType, args);
536 tree.pos = pos;
537 return tree;
538 }
539
540 public JCModifiers Modifiers(long flags, List<JCAnnotation> annotations) {
541 JCModifiers tree = new JCModifiers(flags, annotations);
542 boolean noFlags = (flags & (Flags.ModifierFlags | Flags.ANNOTATION)) == 0;
543 tree.pos = (noFlags && annotations.isEmpty()) ? Position.NOPOS : pos;
544 return tree;
545 }
546
547 public JCModifiers Modifiers(long flags) {
548 return Modifiers(flags, List.nil());
549 }
550
551 @Override
552 public JCModuleDecl ModuleDef(JCModifiers mods, ModuleKind kind,
553 JCExpression qualid, List<JCDirective> directives) {
554 JCModuleDecl tree = new JCModuleDecl(mods, kind, qualid, directives);
555 tree.pos = pos;
556 return tree;
557 }
558
559 @Override
560 public JCExports Exports(JCExpression qualId, List<JCExpression> moduleNames) {
561 JCExports tree = new JCExports(qualId, moduleNames);
562 tree.pos = pos;
563 return tree;
564 }
565
566 @Override
567 public JCOpens Opens(JCExpression qualId, List<JCExpression> moduleNames) {
568 JCOpens tree = new JCOpens(qualId, moduleNames);
569 tree.pos = pos;
570 return tree;
571 }
572
573 @Override
574 public JCProvides Provides(JCExpression serviceName, List<JCExpression> implNames) {
575 JCProvides tree = new JCProvides(serviceName, implNames);
576 tree.pos = pos;
577 return tree;
578 }
579
580 @Override
581 public JCRequires Requires(boolean isTransitive, boolean isStaticPhase, JCExpression qualId) {
582 JCRequires tree = new JCRequires(isTransitive, isStaticPhase, qualId);
583 tree.pos = pos;
584 return tree;
585 }
586
587 @Override
588 public JCUses Uses(JCExpression qualId) {
589 JCUses tree = new JCUses(qualId);
590 tree.pos = pos;
591 return tree;
592 }
593
594 public JCAnnotatedType AnnotatedType(List<JCAnnotation> annotations, JCExpression underlyingType) {
595 JCAnnotatedType tree = new JCAnnotatedType(annotations, underlyingType);
596 tree.pos = pos;
597 return tree;
598 }
599
600 public JCErroneous Erroneous() {
601 return Erroneous(List.nil());
602 }
603
604 public JCErroneous Erroneous(List<? extends JCTree> errs) {
605 JCErroneous tree = new JCErroneous(errs);
606 tree.pos = pos;
607 return tree;
608 }
609
610 public LetExpr LetExpr(List<JCStatement> defs, JCExpression expr) {
611 LetExpr tree = new LetExpr(defs, expr);
612 tree.pos = pos;
613 return tree;
614 }
615
616 /* ***************************************************************************
617 * Derived building blocks.
618 ****************************************************************************/
619
620 public JCClassDecl AnonymousClassDef(JCModifiers mods,
621 List<JCTree> defs)
622 {
623 return ClassDef(mods,
624 names.empty,
625 List.nil(),
626 null,
627 List.nil(),
628 defs);
629 }
630
631 public LetExpr LetExpr(JCVariableDecl def, JCExpression expr) {
632 LetExpr tree = new LetExpr(List.of(def), expr);
633 tree.pos = pos;
634 return tree;
635 }
636
637 /** Create an identifier from a symbol.
638 */
639 public JCIdent Ident(Symbol sym) {
640 return (JCIdent)new JCIdent((sym.name != names.empty)
641 ? sym.name
642 : sym.flatName(), sym)
643 .setPos(pos)
644 .setType(sym.type);
645 }
646
647 /** Create a selection node from a qualifier tree and a symbol.
648 * @param base The qualifier tree.
649 */
650 public JCExpression Select(JCExpression base, Symbol sym) {
651 return new JCFieldAccess(base, sym.name, sym).setPos(pos).setType(sym.type);
652 }
653
654 /** Create a qualified identifier from a symbol, adding enough qualifications
655 * to make the reference unique.
656 */
657 public JCExpression QualIdent(Symbol sym) {
658 return isUnqualifiable(sym)
659 ? Ident(sym)
660 : Select(QualIdent(sym.owner), sym);
661 }
662
663 /** Create an identifier that refers to the variable declared in given variable
664 * declaration.
665 */
666 public JCExpression Ident(JCVariableDecl param) {
667 return Ident(param.sym);
668 }
669
670 /** Create a list of identifiers referring to the variables declared
671 * in given list of variable declarations.
672 */
673 public List<JCExpression> Idents(List<JCVariableDecl> params) {
674 ListBuffer<JCExpression> ids = new ListBuffer<>();
675 for (List<JCVariableDecl> l = params; l.nonEmpty(); l = l.tail)
676 ids.append(Ident(l.head));
677 return ids.toList();
678 }
679
680 /** Create a tree representing `this', given its type.
681 */
682 public JCExpression This(Type t) {
683 return Ident(new VarSymbol(FINAL, names._this, t, t.tsym));
684 }
685
686 /** Create a tree representing qualified `this' given its type
687 */
688 public JCExpression QualThis(Type t) {
689 return Select(Type(t), new VarSymbol(FINAL, names._this, t, t.tsym));
690 }
691
692 /** Create a tree representing a class literal.
693 */
694 public JCExpression ClassLiteral(ClassSymbol clazz) {
695 return ClassLiteral(clazz.type);
696 }
697
698 /** Create a tree representing a class literal.
699 */
700 public JCExpression ClassLiteral(Type t) {
701 VarSymbol lit = new VarSymbol(STATIC | PUBLIC | FINAL,
702 names._class,
703 t,
704 t.tsym);
705 return Select(Type(t), lit);
706 }
707
708 /** Create a tree representing `super', given its type and owner.
709 */
710 public JCIdent Super(Type t, TypeSymbol owner) {
711 return Ident(new VarSymbol(FINAL, names._super, t, owner));
712 }
713
714 /**
715 * Create a method invocation from a method tree and a list of
716 * argument trees.
717 */
718 public JCMethodInvocation App(JCExpression meth, List<JCExpression> args) {
719 return Apply(null, meth, args).setType(meth.type.getReturnType());
720 }
721
722 /**
723 * Create a no-arg method invocation from a method tree
724 */
725 public JCMethodInvocation App(JCExpression meth) {
726 return Apply(null, meth, List.nil()).setType(meth.type.getReturnType());
727 }
728
729 /** Create a method invocation from a method tree and a list of argument trees.
730 */
731 public JCExpression Create(Symbol ctor, List<JCExpression> args) {
732 Type t = ctor.owner.erasure(types);
733 JCNewClass newclass = NewClass(null, null, Type(t), args, null);
734 newclass.constructor = ctor;
735 newclass.setType(t);
736 return newclass;
737 }
738
739 /** Create a tree representing given type.
740 */
741 public JCExpression Type(Type t) {
742 if (t == null) return null;
743 JCExpression tp;
744 switch (t.getTag()) {
745 case BYTE: case CHAR: case SHORT: case INT: case LONG: case FLOAT:
746 case DOUBLE: case BOOLEAN: case VOID:
747 tp = TypeIdent(t.getTag());
748 break;
749 case TYPEVAR:
750 tp = Ident(t.tsym);
751 break;
752 case WILDCARD: {
753 WildcardType a = ((WildcardType) t);
754 tp = Wildcard(TypeBoundKind(a.kind), a.kind == BoundKind.UNBOUND ? null : Type(a.type));
755 break;
756 }
757 case CLASS:
758 switch (t.getKind()) {
759 case UNION: {
760 UnionClassType tu = (UnionClassType)t;
761 ListBuffer<JCExpression> la = new ListBuffer<>();
762 for (Type ta : tu.getAlternativeTypes()) {
763 la.add(Type(ta));
764 }
765 tp = TypeUnion(la.toList());
766 break;
767 }
768 case INTERSECTION: {
769 IntersectionClassType it = (IntersectionClassType)t;
770 ListBuffer<JCExpression> la = new ListBuffer<>();
771 for (Type ta : it.getExplicitComponents()) {
772 la.add(Type(ta));
773 }
774 tp = TypeIntersection(la.toList());
775 break;
776 }
777 default: {
778 Type outer = t.getEnclosingType();
779 JCExpression clazz = outer.hasTag(CLASS) && t.tsym.owner.kind == TYP
780 ? Select(Type(outer), t.tsym)
781 : QualIdent(t.tsym);
782 tp = t.getTypeArguments().isEmpty()
783 ? clazz
784 : TypeApply(clazz, Types(t.getTypeArguments()));
785 break;
786 }
787 }
788 break;
789 case ARRAY:
790 tp = TypeArray(Type(types.elemtype(t)));
791 break;
792 case ERROR:
793 tp = TypeIdent(ERROR);
794 break;
795 default:
796 throw new AssertionError("unexpected type: " + t);
797 }
798 return tp.setType(t);
799 }
800
801 /** Create a list of trees representing given list of types.
802 */
803 public List<JCExpression> Types(List<Type> ts) {
804 ListBuffer<JCExpression> lb = new ListBuffer<>();
805 for (List<Type> l = ts; l.nonEmpty(); l = l.tail)
806 lb.append(Type(l.head));
807 return lb.toList();
808 }
809
810 /** Create a variable definition from a variable symbol and an initializer
811 * expression.
812 */
813 public JCVariableDecl VarDef(VarSymbol v, JCExpression init) {
814 return (JCVariableDecl)
815 new JCVariableDecl(
816 Modifiers(v.flags(), Annotations(v.getRawAttributes())),
817 v.name,
818 Type(v.type),
819 init,
820 v).setPos(pos).setType(v.type);
821 }
822
823 /** Create annotation trees from annotations.
824 */
825 public List<JCAnnotation> Annotations(List<Attribute.Compound> attributes) {
826 if (attributes == null) return List.nil();
827 ListBuffer<JCAnnotation> result = new ListBuffer<>();
828 for (List<Attribute.Compound> i = attributes; i.nonEmpty(); i=i.tail) {
829 Attribute a = i.head;
830 result.append(Annotation(a));
831 }
832 return result.toList();
833 }
834
835 public JCLiteral Literal(Object value) {
836 JCLiteral result = null;
837 if (value instanceof String) {
838 result = Literal(CLASS, value).
839 setType(syms.stringType.constType(value));
840 } else if (value instanceof Integer) {
841 result = Literal(INT, value).
842 setType(syms.intType.constType(value));
843 } else if (value instanceof Long) {
844 result = Literal(LONG, value).
845 setType(syms.longType.constType(value));
846 } else if (value instanceof Byte) {
847 result = Literal(BYTE, value).
848 setType(syms.byteType.constType(value));
849 } else if (value instanceof Character) {
850 int v = (int) (((Character) value).toString().charAt(0));
851 result = Literal(CHAR, v).
852 setType(syms.charType.constType(v));
853 } else if (value instanceof Double) {
854 result = Literal(DOUBLE, value).
855 setType(syms.doubleType.constType(value));
856 } else if (value instanceof Float) {
857 result = Literal(FLOAT, value).
858 setType(syms.floatType.constType(value));
859 } else if (value instanceof Short) {
860 result = Literal(SHORT, value).
861 setType(syms.shortType.constType(value));
862 } else if (value instanceof Boolean) {
863 int v = ((Boolean) value) ? 1 : 0;
864 result = Literal(BOOLEAN, v).
865 setType(syms.booleanType.constType(v));
866 } else {
867 throw new AssertionError(value);
868 }
869 return result;
870 }
871
872 class AnnotationBuilder implements Attribute.Visitor {
873 JCExpression result = null;
874 public void visitConstant(Attribute.Constant v) {
875 result = Literal(v.type.getTag(), v.value);
876 }
877 public void visitClass(Attribute.Class clazz) {
878 result = ClassLiteral(clazz.classType).setType(syms.classType);
879 }
880 public void visitEnum(Attribute.Enum e) {
881 result = QualIdent(e.value);
882 }
883 public void visitError(Attribute.Error e) {
884 if (e instanceof UnresolvedClass) {
885 result = ClassLiteral(((UnresolvedClass) e).classType).setType(syms.classType);
886 } else {
887 result = Erroneous();
888 }
889 }
890 public void visitCompound(Attribute.Compound compound) {
891 if (compound instanceof Attribute.TypeCompound) {
892 result = visitTypeCompoundInternal((Attribute.TypeCompound) compound);
893 } else {
894 result = visitCompoundInternal(compound);
895 }
896 }
897 public JCAnnotation visitCompoundInternal(Attribute.Compound compound) {
898 ListBuffer<JCExpression> args = new ListBuffer<>();
899 for (List<Pair<Symbol.MethodSymbol,Attribute>> values = compound.values; values.nonEmpty(); values=values.tail) {
900 Pair<MethodSymbol,Attribute> pair = values.head;
901 JCExpression valueTree = translate(pair.snd);
902 args.append(Assign(Ident(pair.fst), valueTree).setType(valueTree.type));
903 }
904 return Annotation(Type(compound.type), args.toList());
905 }
906 public JCAnnotation visitTypeCompoundInternal(Attribute.TypeCompound compound) {
907 ListBuffer<JCExpression> args = new ListBuffer<>();
908 for (List<Pair<Symbol.MethodSymbol,Attribute>> values = compound.values; values.nonEmpty(); values=values.tail) {
909 Pair<MethodSymbol,Attribute> pair = values.head;
910 JCExpression valueTree = translate(pair.snd);
911 args.append(Assign(Ident(pair.fst), valueTree).setType(valueTree.type));
912 }
913 return TypeAnnotation(Type(compound.type), args.toList());
914 }
915 public void visitArray(Attribute.Array array) {
916 ListBuffer<JCExpression> elems = new ListBuffer<>();
917 for (int i = 0; i < array.values.length; i++)
918 elems.append(translate(array.values[i]));
919 result = NewArray(null, List.nil(), elems.toList()).setType(array.type);
920 }
921 JCExpression translate(Attribute a) {
922 a.accept(this);
923 return result;
924 }
925 JCAnnotation translate(Attribute.Compound a) {
926 return visitCompoundInternal(a);
927 }
928 JCAnnotation translate(Attribute.TypeCompound a) {
929 return visitTypeCompoundInternal(a);
930 }
931 }
932
933 AnnotationBuilder annotationBuilder = new AnnotationBuilder();
934
935 /** Create an annotation tree from an attribute.
936 */
937 public JCAnnotation Annotation(Attribute a) {
938 return annotationBuilder.translate((Attribute.Compound)a);
939 }
940
941 public JCAnnotation TypeAnnotation(Attribute a) {
942 return annotationBuilder.translate((Attribute.TypeCompound) a);
943 }
944
945 /** Create a method definition from a method symbol and a method body.
946 */
947 public JCMethodDecl MethodDef(MethodSymbol m, JCBlock body) {
948 return MethodDef(m, m.type, body);
949 }
950
951 /** Create a method definition from a method symbol, method type
952 * and a method body.
953 */
954 public JCMethodDecl MethodDef(MethodSymbol m, Type mtype, JCBlock body) {
955 return (JCMethodDecl)
956 new JCMethodDecl(
957 Modifiers(m.flags(), Annotations(m.getRawAttributes())),
958 m.name,
959 Type(mtype.getReturnType()),
960 TypeParams(mtype.getTypeArguments()),
961 null, // receiver type
962 Params(mtype.getParameterTypes(), m),
963 Types(mtype.getThrownTypes()),
964 body,
965 null,
966 m).setPos(pos).setType(mtype);
967 }
968
969 /** Create a type parameter tree from its name and type.
970 */
971 public JCTypeParameter TypeParam(Name name, TypeVar tvar) {
972 return (JCTypeParameter)
973 TypeParameter(name, Types(types.getBounds(tvar))).setPos(pos).setType(tvar);
974 }
975
976 /** Create a list of type parameter trees from a list of type variables.
977 */
978 public List<JCTypeParameter> TypeParams(List<Type> typarams) {
979 ListBuffer<JCTypeParameter> tparams = new ListBuffer<>();
980 for (List<Type> l = typarams; l.nonEmpty(); l = l.tail)
981 tparams.append(TypeParam(l.head.tsym.name, (TypeVar)l.head));
982 return tparams.toList();
983 }
984
985 /** Create a value parameter tree from its name, type, and owner.
986 */
987 public JCVariableDecl Param(Name name, Type argtype, Symbol owner) {
988 return VarDef(new VarSymbol(PARAMETER, name, argtype, owner), null);
989 }
990
991 /** Create a a list of value parameter trees x0, ..., xn from a list of
992 * their types and an their owner.
993 */
994 public List<JCVariableDecl> Params(List<Type> argtypes, Symbol owner) {
995 ListBuffer<JCVariableDecl> params = new ListBuffer<>();
996 MethodSymbol mth = (owner.kind == MTH) ? ((MethodSymbol)owner) : null;
997 if (mth != null && mth.params != null && argtypes.length() == mth.params.length()) {
998 for (VarSymbol param : ((MethodSymbol)owner).params)
999 params.append(VarDef(param, null));
1000 } else {
1001 int i = 0;
1002 for (List<Type> l = argtypes; l.nonEmpty(); l = l.tail)
1003 params.append(Param(paramName(i++), l.head, owner));
1004 }
1005 return params.toList();
1006 }
1007
1008 /** Wrap a method invocation in an expression statement or return statement,
1009 * depending on whether the method invocation expression's type is void.
1010 */
1011 public JCStatement Call(JCExpression apply) {
1012 return apply.type.hasTag(VOID) ? Exec(apply) : Return(apply);
1013 }
1014
1015 /** Construct an assignment from a variable symbol and a right hand side.
1016 */
1017 public JCStatement Assignment(Symbol v, JCExpression rhs) {
1018 return Exec(Assign(Ident(v), rhs).setType(v.type));
1019 }
1020
1021 /** Construct an index expression from a variable and an expression.
1022 */
1023 public JCArrayAccess Indexed(Symbol v, JCExpression index) {
1024 JCArrayAccess tree = new JCArrayAccess(QualIdent(v), index);
1025 tree.type = ((ArrayType)v.type).elemtype;
1026 return tree;
1027 }
1028
1029 /** Make an attributed type cast expression.
1030 */
1031 public JCTypeCast TypeCast(Type type, JCExpression expr) {
1032 return (JCTypeCast)TypeCast(Type(type), expr).setType(type);
1033 }
1034
1035 /* ***************************************************************************
1036 * Helper methods.
1037 ****************************************************************************/
1038
1039 /** Can given symbol be referred to in unqualified form?
1040 */
1041 boolean isUnqualifiable(Symbol sym) {
1042 if (sym.name == names.empty ||
1043 sym.owner == null ||
1044 sym.owner == syms.rootPackage ||
1045 sym.owner.kind == MTH || sym.owner.kind == VAR) {
1046 return true;
1047 } else if (sym.kind == TYP && toplevel != null) {
1048 Iterator<Symbol> it = toplevel.namedImportScope.getSymbolsByName(sym.name).iterator();
1049 if (it.hasNext()) {
1050 Symbol s = it.next();
1051 return
1052 s == sym &&
1053 !it.hasNext();
1054 }
1055 it = toplevel.packge.members().getSymbolsByName(sym.name).iterator();
1056 if (it.hasNext()) {
1057 Symbol s = it.next();
1058 return
1059 s == sym &&
1060 !it.hasNext();
1061 }
1062 it = toplevel.starImportScope.getSymbolsByName(sym.name).iterator();
1063 if (it.hasNext()) {
1064 Symbol s = it.next();
1065 return
1066 s == sym &&
1067 !it.hasNext();
1068 }
1069 }
1070 return false;
1071 }
1072
1073 /** The name of synthetic parameter number `i'.
1074 */
1075 public Name paramName(int i) { return names.fromString("x" + i); }
1076
1077 /** The name of synthetic type parameter number `i'.
1078 */
1079 public Name typaramName(int i) { return names.fromString("A" + i); }
1080 }