1 | /* |
2 | * Copyright 1999-2006 Sun Microsystems, Inc. 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. Sun designates this |
8 | * particular file as subject to the "Classpath" exception as provided |
9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
23 | * have any questions. |
24 | */ |
25 | |
26 | package com.sun.tools.javac.tree; |
27 | |
28 | import com.sun.tools.javac.code.*; |
29 | import com.sun.tools.javac.code.Symbol.*; |
30 | import com.sun.tools.javac.code.Type.*; |
31 | import com.sun.tools.javac.util.*; |
32 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
33 | |
34 | import com.sun.tools.javac.tree.JCTree.*; |
35 | |
36 | import static com.sun.tools.javac.code.Flags.*; |
37 | import static com.sun.tools.javac.code.Kinds.*; |
38 | import static com.sun.tools.javac.code.TypeTags.*; |
39 | |
40 | /** Factory class for trees. |
41 | * |
42 | * <p><b>This is NOT part of any API supported by Sun Microsystems. If |
43 | * you write code that depends on this, you do so at your own risk. |
44 | * This code and its internal interfaces are subject to change or |
45 | * deletion without notice.</b> |
46 | */ |
47 | public class TreeMaker implements JCTree.Factory { |
48 | |
49 | /** The context key for the tree factory. */ |
50 | protected static final Context.Key<TreeMaker> treeMakerKey = |
51 | new Context.Key<TreeMaker>(); |
52 | |
53 | /** Get the TreeMaker instance. */ |
54 | public static TreeMaker instance(Context context) { |
55 | TreeMaker instance = context.get(treeMakerKey); |
56 | if (instance == null) |
57 | instance = new TreeMaker(context); |
58 | return instance; |
59 | } |
60 | |
61 | /** The position at which subsequent trees will be created. |
62 | */ |
63 | public int pos = Position.NOPOS; |
64 | |
65 | /** The toplevel tree to which created trees belong. |
66 | */ |
67 | public JCCompilationUnit toplevel; |
68 | |
69 | /** The current name table. */ |
70 | Name.Table names; |
71 | |
72 | Types types; |
73 | |
74 | /** The current symbol table. */ |
75 | Symtab syms; |
76 | |
77 | /** Create a tree maker with null toplevel and NOPOS as initial position. |
78 | */ |
79 | protected TreeMaker(Context context) { |
80 | context.put(treeMakerKey, this); |
81 | this.pos = Position.NOPOS; |
82 | this.toplevel = null; |
83 | this.names = Name.Table.instance(context); |
84 | this.syms = Symtab.instance(context); |
85 | this.types = Types.instance(context); |
86 | } |
87 | |
88 | /** Create a tree maker with a given toplevel and FIRSTPOS as initial position. |
89 | */ |
90 | TreeMaker(JCCompilationUnit toplevel, Name.Table names, Types types, Symtab syms) { |
91 | this.pos = Position.FIRSTPOS; |
92 | this.toplevel = toplevel; |
93 | this.names = names; |
94 | this.types = types; |
95 | this.syms = syms; |
96 | } |
97 | |
98 | /** Create a new tree maker for a given toplevel. |
99 | */ |
100 | public TreeMaker forToplevel(JCCompilationUnit toplevel) { |
101 | return new TreeMaker(toplevel, names, types, syms); |
102 | } |
103 | |
104 | /** Reassign current position. |
105 | */ |
106 | public TreeMaker at(int pos) { |
107 | this.pos = pos; |
108 | return this; |
109 | } |
110 | |
111 | /** Reassign current position. |
112 | */ |
113 | public TreeMaker at(DiagnosticPosition pos) { |
114 | this.pos = (pos == null ? Position.NOPOS : pos.getStartPosition()); |
115 | return this; |
116 | } |
117 | |
118 | /** |
119 | * Create given tree node at current position. |
120 | * @param defs a list of ClassDef, Import, and Skip |
121 | */ |
122 | public JCCompilationUnit TopLevel(List<JCAnnotation> packageAnnotations, |
123 | JCExpression pid, |
124 | List<JCTree> defs) { |
125 | assert packageAnnotations != null; |
126 | for (JCTree node : defs) |
127 | assert node instanceof JCClassDecl |
128 | || node instanceof JCImport |
129 | || node instanceof JCSkip |
130 | || node instanceof JCErroneous |
131 | || (node instanceof JCExpressionStatement |
132 | && ((JCExpressionStatement)node).expr instanceof JCErroneous) |
133 | : node.getClass().getSimpleName(); |
134 | JCCompilationUnit tree = new JCCompilationUnit(packageAnnotations, pid, defs, |
135 | null, null, null, null); |
136 | tree.pos = pos; |
137 | return tree; |
138 | } |
139 | |
140 | public JCImport Import(JCTree qualid, boolean importStatic) { |
141 | JCImport tree = new JCImport(qualid, importStatic); |
142 | tree.pos = pos; |
143 | return tree; |
144 | } |
145 | |
146 | public JCClassDecl ClassDef(JCModifiers mods, |
147 | Name name, |
148 | List<JCTypeParameter> typarams, |
149 | JCTree extending, |
150 | List<JCExpression> implementing, |
151 | List<JCTree> defs) |
152 | { |
153 | JCClassDecl tree = new JCClassDecl(mods, |
154 | name, |
155 | typarams, |
156 | extending, |
157 | implementing, |
158 | defs, |
159 | null); |
160 | tree.pos = pos; |
161 | return tree; |
162 | } |
163 | |
164 | public JCMethodDecl MethodDef(JCModifiers mods, |
165 | Name name, |
166 | JCExpression restype, |
167 | List<JCTypeParameter> typarams, |
168 | List<JCVariableDecl> params, |
169 | List<JCExpression> thrown, |
170 | JCBlock body, |
171 | JCExpression defaultValue) |
172 | { |
173 | JCMethodDecl tree = new JCMethodDecl(mods, |
174 | name, |
175 | restype, |
176 | typarams, |
177 | params, |
178 | thrown, |
179 | body, |
180 | defaultValue, |
181 | null); |
182 | tree.pos = pos; |
183 | return tree; |
184 | } |
185 | |
186 | public JCVariableDecl VarDef(JCModifiers mods, Name name, JCExpression vartype, JCExpression init) { |
187 | JCVariableDecl tree = new JCVariableDecl(mods, name, vartype, init, null); |
188 | tree.pos = pos; |
189 | return tree; |
190 | } |
191 | |
192 | public JCSkip Skip() { |
193 | JCSkip tree = new JCSkip(); |
194 | tree.pos = pos; |
195 | return tree; |
196 | } |
197 | |
198 | public JCBlock Block(long flags, List<JCStatement> stats) { |
199 | JCBlock tree = new JCBlock(flags, stats); |
200 | tree.pos = pos; |
201 | return tree; |
202 | } |
203 | |
204 | public JCDoWhileLoop DoLoop(JCStatement body, JCExpression cond) { |
205 | JCDoWhileLoop tree = new JCDoWhileLoop(body, cond); |
206 | tree.pos = pos; |
207 | return tree; |
208 | } |
209 | |
210 | public JCWhileLoop WhileLoop(JCExpression cond, JCStatement body) { |
211 | JCWhileLoop tree = new JCWhileLoop(cond, body); |
212 | tree.pos = pos; |
213 | return tree; |
214 | } |
215 | |
216 | public JCForLoop ForLoop(List<JCStatement> init, |
217 | JCExpression cond, |
218 | List<JCExpressionStatement> step, |
219 | JCStatement body) |
220 | { |
221 | JCForLoop tree = new JCForLoop(init, cond, step, body); |
222 | tree.pos = pos; |
223 | return tree; |
224 | } |
225 | |
226 | public JCEnhancedForLoop ForeachLoop(JCVariableDecl var, JCExpression expr, JCStatement body) { |
227 | JCEnhancedForLoop tree = new JCEnhancedForLoop(var, expr, body); |
228 | tree.pos = pos; |
229 | return tree; |
230 | } |
231 | |
232 | public JCLabeledStatement Labelled(Name label, JCStatement body) { |
233 | JCLabeledStatement tree = new JCLabeledStatement(label, body); |
234 | tree.pos = pos; |
235 | return tree; |
236 | } |
237 | |
238 | public JCSwitch Switch(JCExpression selector, List<JCCase> cases) { |
239 | JCSwitch tree = new JCSwitch(selector, cases); |
240 | tree.pos = pos; |
241 | return tree; |
242 | } |
243 | |
244 | public JCCase Case(JCExpression pat, List<JCStatement> stats) { |
245 | JCCase tree = new JCCase(pat, stats); |
246 | tree.pos = pos; |
247 | return tree; |
248 | } |
249 | |
250 | public JCSynchronized Synchronized(JCExpression lock, JCBlock body) { |
251 | JCSynchronized tree = new JCSynchronized(lock, body); |
252 | tree.pos = pos; |
253 | return tree; |
254 | } |
255 | |
256 | public JCTry Try(JCBlock body, List<JCCatch> catchers, JCBlock finalizer) { |
257 | JCTry tree = new JCTry(body, catchers, finalizer); |
258 | tree.pos = pos; |
259 | return tree; |
260 | } |
261 | |
262 | public JCCatch Catch(JCVariableDecl param, JCBlock body) { |
263 | JCCatch tree = new JCCatch(param, body); |
264 | tree.pos = pos; |
265 | return tree; |
266 | } |
267 | |
268 | public JCConditional Conditional(JCExpression cond, |
269 | JCExpression thenpart, |
270 | JCExpression elsepart) |
271 | { |
272 | JCConditional tree = new JCConditional(cond, thenpart, elsepart); |
273 | tree.pos = pos; |
274 | return tree; |
275 | } |
276 | |
277 | public JCIf If(JCExpression cond, JCStatement thenpart, JCStatement elsepart) { |
278 | JCIf tree = new JCIf(cond, thenpart, elsepart); |
279 | tree.pos = pos; |
280 | return tree; |
281 | } |
282 | |
283 | public JCExpressionStatement Exec(JCExpression expr) { |
284 | JCExpressionStatement tree = new JCExpressionStatement(expr); |
285 | tree.pos = pos; |
286 | return tree; |
287 | } |
288 | |
289 | public JCBreak Break(Name label) { |
290 | JCBreak tree = new JCBreak(label, null); |
291 | tree.pos = pos; |
292 | return tree; |
293 | } |
294 | |
295 | public JCContinue Continue(Name label) { |
296 | JCContinue tree = new JCContinue(label, null); |
297 | tree.pos = pos; |
298 | return tree; |
299 | } |
300 | |
301 | public JCReturn Return(JCExpression expr) { |
302 | JCReturn tree = new JCReturn(expr); |
303 | tree.pos = pos; |
304 | return tree; |
305 | } |
306 | |
307 | public JCThrow Throw(JCTree expr) { |
308 | JCThrow tree = new JCThrow(expr); |
309 | tree.pos = pos; |
310 | return tree; |
311 | } |
312 | |
313 | public JCAssert Assert(JCExpression cond, JCExpression detail) { |
314 | JCAssert tree = new JCAssert(cond, detail); |
315 | tree.pos = pos; |
316 | return tree; |
317 | } |
318 | |
319 | public JCMethodInvocation Apply(List<JCExpression> typeargs, |
320 | JCExpression fn, |
321 | List<JCExpression> args) |
322 | { |
323 | JCMethodInvocation tree = new JCMethodInvocation(typeargs, fn, args); |
324 | tree.pos = pos; |
325 | return tree; |
326 | } |
327 | |
328 | public JCNewClass NewClass(JCExpression encl, |
329 | List<JCExpression> typeargs, |
330 | JCExpression clazz, |
331 | List<JCExpression> args, |
332 | JCClassDecl def) |
333 | { |
334 | JCNewClass tree = new JCNewClass(encl, typeargs, clazz, args, def); |
335 | tree.pos = pos; |
336 | return tree; |
337 | } |
338 | |
339 | public JCNewArray NewArray(JCExpression elemtype, |
340 | List<JCExpression> dims, |
341 | List<JCExpression> elems) |
342 | { |
343 | JCNewArray tree = new JCNewArray(elemtype, dims, elems); |
344 | tree.pos = pos; |
345 | return tree; |
346 | } |
347 | |
348 | public JCParens Parens(JCExpression expr) { |
349 | JCParens tree = new JCParens(expr); |
350 | tree.pos = pos; |
351 | return tree; |
352 | } |
353 | |
354 | public JCAssign Assign(JCExpression lhs, JCExpression rhs) { |
355 | JCAssign tree = new JCAssign(lhs, rhs); |
356 | tree.pos = pos; |
357 | return tree; |
358 | } |
359 | |
360 | public JCAssignOp Assignop(int opcode, JCTree lhs, JCTree rhs) { |
361 | JCAssignOp tree = new JCAssignOp(opcode, lhs, rhs, null); |
362 | tree.pos = pos; |
363 | return tree; |
364 | } |
365 | |
366 | public JCUnary Unary(int opcode, JCExpression arg) { |
367 | JCUnary tree = new JCUnary(opcode, arg); |
368 | tree.pos = pos; |
369 | return tree; |
370 | } |
371 | |
372 | public JCBinary Binary(int opcode, JCExpression lhs, JCExpression rhs) { |
373 | JCBinary tree = new JCBinary(opcode, lhs, rhs, null); |
374 | tree.pos = pos; |
375 | return tree; |
376 | } |
377 | |
378 | public JCTypeCast TypeCast(JCTree clazz, JCExpression expr) { |
379 | JCTypeCast tree = new JCTypeCast(clazz, expr); |
380 | tree.pos = pos; |
381 | return tree; |
382 | } |
383 | |
384 | public JCInstanceOf TypeTest(JCExpression expr, JCTree clazz) { |
385 | JCInstanceOf tree = new JCInstanceOf(expr, clazz); |
386 | tree.pos = pos; |
387 | return tree; |
388 | } |
389 | |
390 | public JCArrayAccess Indexed(JCExpression indexed, JCExpression index) { |
391 | JCArrayAccess tree = new JCArrayAccess(indexed, index); |
392 | tree.pos = pos; |
393 | return tree; |
394 | } |
395 | |
396 | public JCFieldAccess Select(JCExpression selected, Name selector) { |
397 | JCFieldAccess tree = new JCFieldAccess(selected, selector, null); |
398 | tree.pos = pos; |
399 | return tree; |
400 | } |
401 | |
402 | public JCIdent Ident(Name name) { |
403 | JCIdent tree = new JCIdent(name, null); |
404 | tree.pos = pos; |
405 | return tree; |
406 | } |
407 | |
408 | public JCLiteral Literal(int tag, Object value) { |
409 | JCLiteral tree = new JCLiteral(tag, value); |
410 | tree.pos = pos; |
411 | return tree; |
412 | } |
413 | |
414 | public JCPrimitiveTypeTree TypeIdent(int typetag) { |
415 | JCPrimitiveTypeTree tree = new JCPrimitiveTypeTree(typetag); |
416 | tree.pos = pos; |
417 | return tree; |
418 | } |
419 | |
420 | public JCArrayTypeTree TypeArray(JCExpression elemtype) { |
421 | JCArrayTypeTree tree = new JCArrayTypeTree(elemtype); |
422 | tree.pos = pos; |
423 | return tree; |
424 | } |
425 | |
426 | public JCTypeApply TypeApply(JCExpression clazz, List<JCExpression> arguments) { |
427 | JCTypeApply tree = new JCTypeApply(clazz, arguments); |
428 | tree.pos = pos; |
429 | return tree; |
430 | } |
431 | |
432 | public JCTypeParameter TypeParameter(Name name, List<JCExpression> bounds) { |
433 | JCTypeParameter tree = new JCTypeParameter(name, bounds); |
434 | tree.pos = pos; |
435 | return tree; |
436 | } |
437 | |
438 | public JCWildcard Wildcard(TypeBoundKind kind, JCTree type) { |
439 | JCWildcard tree = new JCWildcard(kind, type); |
440 | tree.pos = pos; |
441 | return tree; |
442 | } |
443 | |
444 | public TypeBoundKind TypeBoundKind(BoundKind kind) { |
445 | TypeBoundKind tree = new TypeBoundKind(kind); |
446 | tree.pos = pos; |
447 | return tree; |
448 | } |
449 | |
450 | public JCAnnotation Annotation(JCTree annotationType, List<JCExpression> args) { |
451 | JCAnnotation tree = new JCAnnotation(annotationType, args); |
452 | tree.pos = pos; |
453 | return tree; |
454 | } |
455 | |
456 | public JCModifiers Modifiers(long flags, List<JCAnnotation> annotations) { |
457 | JCModifiers tree = new JCModifiers(flags, annotations); |
458 | boolean noFlags = (flags & Flags.StandardFlags) == 0; |
459 | tree.pos = (noFlags && annotations.isEmpty()) ? Position.NOPOS : pos; |
460 | return tree; |
461 | } |
462 | |
463 | public JCModifiers Modifiers(long flags) { |
464 | return Modifiers(flags, List.<JCAnnotation>nil()); |
465 | } |
466 | |
467 | public JCErroneous Erroneous() { |
468 | return Erroneous(List.<JCTree>nil()); |
469 | } |
470 | |
471 | public JCErroneous Erroneous(List<? extends JCTree> errs) { |
472 | JCErroneous tree = new JCErroneous(errs); |
473 | tree.pos = pos; |
474 | return tree; |
475 | } |
476 | |
477 | public LetExpr LetExpr(List<JCVariableDecl> defs, JCTree expr) { |
478 | LetExpr tree = new LetExpr(defs, expr); |
479 | tree.pos = pos; |
480 | return tree; |
481 | } |
482 | |
483 | /* *************************************************************************** |
484 | * Derived building blocks. |
485 | ****************************************************************************/ |
486 | |
487 | public JCClassDecl AnonymousClassDef(JCModifiers mods, |
488 | List<JCTree> defs) |
489 | { |
490 | return ClassDef(mods, |
491 | names.empty, |
492 | List.<JCTypeParameter>nil(), |
493 | null, |
494 | List.<JCExpression>nil(), |
495 | defs); |
496 | } |
497 | |
498 | public LetExpr LetExpr(JCVariableDecl def, JCTree expr) { |
499 | LetExpr tree = new LetExpr(List.of(def), expr); |
500 | tree.pos = pos; |
501 | return tree; |
502 | } |
503 | |
504 | /** Create an identifier from a symbol. |
505 | */ |
506 | public JCIdent Ident(Symbol sym) { |
507 | return (JCIdent)new JCIdent((sym.name != names.empty) |
508 | ? sym.name |
509 | : sym.flatName(), sym) |
510 | .setPos(pos) |
511 | .setType(sym.type); |
512 | } |
513 | |
514 | /** Create a selection node from a qualifier tree and a symbol. |
515 | * @param base The qualifier tree. |
516 | */ |
517 | public JCExpression Select(JCExpression base, Symbol sym) { |
518 | return new JCFieldAccess(base, sym.name, sym).setPos(pos).setType(sym.type); |
519 | } |
520 | |
521 | /** Create a qualified identifier from a symbol, adding enough qualifications |
522 | * to make the reference unique. |
523 | */ |
524 | public JCExpression QualIdent(Symbol sym) { |
525 | return isUnqualifiable(sym) |
526 | ? Ident(sym) |
527 | : Select(QualIdent(sym.owner), sym); |
528 | } |
529 | |
530 | /** Create an identifier that refers to the variable declared in given variable |
531 | * declaration. |
532 | */ |
533 | public JCExpression Ident(JCVariableDecl param) { |
534 | return Ident(param.sym); |
535 | } |
536 | |
537 | /** Create a list of identifiers referring to the variables declared |
538 | * in given list of variable declarations. |
539 | */ |
540 | public List<JCExpression> Idents(List<JCVariableDecl> params) { |
541 | ListBuffer<JCExpression> ids = new ListBuffer<JCExpression>(); |
542 | for (List<JCVariableDecl> l = params; l.nonEmpty(); l = l.tail) |
543 | ids.append(Ident(l.head)); |
544 | return ids.toList(); |
545 | } |
546 | |
547 | /** Create a tree representing `this', given its type. |
548 | */ |
549 | public JCExpression This(Type t) { |
550 | return Ident(new VarSymbol(FINAL, names._this, t, t.tsym)); |
551 | } |
552 | |
553 | /** Create a tree representing a class literal. |
554 | */ |
555 | public JCExpression ClassLiteral(ClassSymbol clazz) { |
556 | return ClassLiteral(clazz.type); |
557 | } |
558 | |
559 | /** Create a tree representing a class literal. |
560 | */ |
561 | public JCExpression ClassLiteral(Type t) { |
562 | VarSymbol lit = new VarSymbol(STATIC | PUBLIC | FINAL, |
563 | names._class, |
564 | t, |
565 | t.tsym); |
566 | return Select(Type(t), lit); |
567 | } |
568 | |
569 | /** Create a tree representing `super', given its type and owner. |
570 | */ |
571 | public JCIdent Super(Type t, TypeSymbol owner) { |
572 | return Ident(new VarSymbol(FINAL, names._super, t, owner)); |
573 | } |
574 | |
575 | /** |
576 | * Create a method invocation from a method tree and a list of |
577 | * argument trees. |
578 | */ |
579 | public JCMethodInvocation App(JCExpression meth, List<JCExpression> args) { |
580 | return Apply(null, meth, args).setType(meth.type.getReturnType()); |
581 | } |
582 | |
583 | /** |
584 | * Create a no-arg method invocation from a method tree |
585 | */ |
586 | public JCMethodInvocation App(JCExpression meth) { |
587 | return Apply(null, meth, List.<JCExpression>nil()).setType(meth.type.getReturnType()); |
588 | } |
589 | |
590 | /** Create a method invocation from a method tree and a list of argument trees. |
591 | */ |
592 | public JCExpression Create(Symbol ctor, List<JCExpression> args) { |
593 | Type t = ctor.owner.erasure(types); |
594 | JCNewClass newclass = NewClass(null, null, Type(t), args, null); |
595 | newclass.constructor = ctor; |
596 | newclass.setType(t); |
597 | return newclass; |
598 | } |
599 | |
600 | /** Create a tree representing given type. |
601 | */ |
602 | public JCExpression Type(Type t) { |
603 | if (t == null) return null; |
604 | JCExpression tp; |
605 | switch (t.tag) { |
606 | case BYTE: case CHAR: case SHORT: case INT: case LONG: case FLOAT: |
607 | case DOUBLE: case BOOLEAN: case VOID: |
608 | tp = TypeIdent(t.tag); |
609 | break; |
610 | case TYPEVAR: |
611 | tp = Ident(t.tsym); |
612 | break; |
613 | case WILDCARD: { |
614 | WildcardType a = ((WildcardType) t); |
615 | tp = Wildcard(TypeBoundKind(a.kind), Type(a.type)); |
616 | break; |
617 | } |
618 | case CLASS: |
619 | Type outer = t.getEnclosingType(); |
620 | JCExpression clazz = outer.tag == CLASS && t.tsym.owner.kind == TYP |
621 | ? Select(Type(outer), t.tsym) |
622 | : QualIdent(t.tsym); |
623 | tp = t.getTypeArguments().isEmpty() |
624 | ? clazz |
625 | : TypeApply(clazz, Types(t.getTypeArguments())); |
626 | break; |
627 | case ARRAY: |
628 | tp = TypeArray(Type(types.elemtype(t))); |
629 | break; |
630 | case ERROR: |
631 | tp = TypeIdent(ERROR); |
632 | break; |
633 | default: |
634 | throw new AssertionError("unexpected type: " + t); |
635 | } |
636 | return tp.setType(t); |
637 | } |
638 | //where |
639 | private JCExpression Selectors(JCExpression base, Symbol sym, Symbol limit) { |
640 | if (sym == limit) return base; |
641 | else return Select(Selectors(base, sym.owner, limit), sym); |
642 | } |
643 | |
644 | /** Create a list of trees representing given list of types. |
645 | */ |
646 | public List<JCExpression> Types(List<Type> ts) { |
647 | ListBuffer<JCExpression> types = new ListBuffer<JCExpression>(); |
648 | for (List<Type> l = ts; l.nonEmpty(); l = l.tail) |
649 | types.append(Type(l.head)); |
650 | return types.toList(); |
651 | } |
652 | |
653 | /** Create a variable definition from a variable symbol and an initializer |
654 | * expression. |
655 | */ |
656 | public JCVariableDecl VarDef(VarSymbol v, JCExpression init) { |
657 | return (JCVariableDecl) |
658 | new JCVariableDecl( |
659 | Modifiers(v.flags(), Annotations(v.getAnnotationMirrors())), |
660 | v.name, |
661 | Type(v.type), |
662 | init, |
663 | v).setPos(pos).setType(v.type); |
664 | } |
665 | |
666 | /** Create annotation trees from annotations. |
667 | */ |
668 | public List<JCAnnotation> Annotations(List<Attribute.Compound> attributes) { |
669 | if (attributes == null) return List.nil(); |
670 | ListBuffer<JCAnnotation> result = new ListBuffer<JCAnnotation>(); |
671 | for (List<Attribute.Compound> i = attributes; i.nonEmpty(); i=i.tail) { |
672 | Attribute a = i.head; |
673 | result.append(Annotation(a)); |
674 | } |
675 | return result.toList(); |
676 | } |
677 | |
678 | public JCLiteral Literal(Object value) { |
679 | JCLiteral result = null; |
680 | if (value instanceof String) { |
681 | result = Literal(CLASS, value). |
682 | setType(syms.stringType.constType(value)); |
683 | } else if (value instanceof Integer) { |
684 | result = Literal(INT, value). |
685 | setType(syms.intType.constType(value)); |
686 | } else if (value instanceof Long) { |
687 | result = Literal(LONG, value). |
688 | setType(syms.longType.constType(value)); |
689 | } else if (value instanceof Byte) { |
690 | result = Literal(BYTE, value). |
691 | setType(syms.byteType.constType(value)); |
692 | } else if (value instanceof Character) { |
693 | result = Literal(CHAR, value). |
694 | setType(syms.charType.constType(value)); |
695 | } else if (value instanceof Double) { |
696 | result = Literal(DOUBLE, value). |
697 | setType(syms.doubleType.constType(value)); |
698 | } else if (value instanceof Float) { |
699 | result = Literal(FLOAT, value). |
700 | setType(syms.floatType.constType(value)); |
701 | } else if (value instanceof Short) { |
702 | result = Literal(SHORT, value). |
703 | setType(syms.shortType.constType(value)); |
704 | } else { |
705 | throw new AssertionError(value); |
706 | } |
707 | return result; |
708 | } |
709 | |
710 | class AnnotationBuilder implements Attribute.Visitor { |
711 | JCExpression result = null; |
712 | public void visitConstant(Attribute.Constant v) { |
713 | result = Literal(v.value); |
714 | } |
715 | public void visitClass(Attribute.Class clazz) { |
716 | result = ClassLiteral(clazz.type).setType(syms.classType); |
717 | } |
718 | public void visitEnum(Attribute.Enum e) { |
719 | result = QualIdent(e.value); |
720 | } |
721 | public void visitError(Attribute.Error e) { |
722 | result = Erroneous(); |
723 | } |
724 | public void visitCompound(Attribute.Compound compound) { |
725 | result = visitCompoundInternal(compound); |
726 | } |
727 | public JCAnnotation visitCompoundInternal(Attribute.Compound compound) { |
728 | ListBuffer<JCExpression> args = new ListBuffer<JCExpression>(); |
729 | for (List<Pair<Symbol.MethodSymbol,Attribute>> values = compound.values; values.nonEmpty(); values=values.tail) { |
730 | Pair<MethodSymbol,Attribute> pair = values.head; |
731 | JCExpression valueTree = translate(pair.snd); |
732 | args.append(Assign(Ident(pair.fst), valueTree).setType(valueTree.type)); |
733 | } |
734 | return Annotation(Type(compound.type), args.toList()); |
735 | } |
736 | public void visitArray(Attribute.Array array) { |
737 | ListBuffer<JCExpression> elems = new ListBuffer<JCExpression>(); |
738 | for (int i = 0; i < array.values.length; i++) |
739 | elems.append(translate(array.values[i])); |
740 | result = NewArray(null, List.<JCExpression>nil(), elems.toList()).setType(array.type); |
741 | } |
742 | JCExpression translate(Attribute a) { |
743 | a.accept(this); |
744 | return result; |
745 | } |
746 | JCAnnotation translate(Attribute.Compound a) { |
747 | return visitCompoundInternal(a); |
748 | } |
749 | } |
750 | AnnotationBuilder annotationBuilder = new AnnotationBuilder(); |
751 | |
752 | /** Create an annotation tree from an attribute. |
753 | */ |
754 | public JCAnnotation Annotation(Attribute a) { |
755 | return annotationBuilder.translate((Attribute.Compound)a); |
756 | } |
757 | |
758 | /** Create a method definition from a method symbol and a method body. |
759 | */ |
760 | public JCMethodDecl MethodDef(MethodSymbol m, JCBlock body) { |
761 | return MethodDef(m, m.type, body); |
762 | } |
763 | |
764 | /** Create a method definition from a method symbol, method type |
765 | * and a method body. |
766 | */ |
767 | public JCMethodDecl MethodDef(MethodSymbol m, Type mtype, JCBlock body) { |
768 | return (JCMethodDecl) |
769 | new JCMethodDecl( |
770 | Modifiers(m.flags(), Annotations(m.getAnnotationMirrors())), |
771 | m.name, |
772 | Type(mtype.getReturnType()), |
773 | TypeParams(mtype.getTypeArguments()), |
774 | Params(mtype.getParameterTypes(), m), |
775 | Types(mtype.getThrownTypes()), |
776 | body, |
777 | null, |
778 | m).setPos(pos).setType(mtype); |
779 | } |
780 | |
781 | /** Create a type parameter tree from its name and type. |
782 | */ |
783 | public JCTypeParameter TypeParam(Name name, TypeVar tvar) { |
784 | return (JCTypeParameter) |
785 | TypeParameter(name, Types(types.getBounds(tvar))).setPos(pos).setType(tvar); |
786 | } |
787 | |
788 | /** Create a list of type parameter trees from a list of type variables. |
789 | */ |
790 | public List<JCTypeParameter> TypeParams(List<Type> typarams) { |
791 | ListBuffer<JCTypeParameter> tparams = new ListBuffer<JCTypeParameter>(); |
792 | int i = 0; |
793 | for (List<Type> l = typarams; l.nonEmpty(); l = l.tail) |
794 | tparams.append(TypeParam(l.head.tsym.name, (TypeVar)l.head)); |
795 | return tparams.toList(); |
796 | } |
797 | |
798 | /** Create a value parameter tree from its name, type, and owner. |
799 | */ |
800 | public JCVariableDecl Param(Name name, Type argtype, Symbol owner) { |
801 | return VarDef(new VarSymbol(0, name, argtype, owner), null); |
802 | } |
803 | |
804 | /** Create a a list of value parameter trees x0, ..., xn from a list of |
805 | * their types and an their owner. |
806 | */ |
807 | public List<JCVariableDecl> Params(List<Type> argtypes, Symbol owner) { |
808 | ListBuffer<JCVariableDecl> params = new ListBuffer<JCVariableDecl>(); |
809 | MethodSymbol mth = (owner.kind == MTH) ? ((MethodSymbol)owner) : null; |
810 | if (mth != null && mth.params != null && argtypes.length() == mth.params.length()) { |
811 | for (VarSymbol param : ((MethodSymbol)owner).params) |
812 | params.append(VarDef(param, null)); |
813 | } else { |
814 | int i = 0; |
815 | for (List<Type> l = argtypes; l.nonEmpty(); l = l.tail) |
816 | params.append(Param(paramName(i++), l.head, owner)); |
817 | } |
818 | return params.toList(); |
819 | } |
820 | |
821 | /** Wrap a method invocation in an expression statement or return statement, |
822 | * depending on whether the method invocation expression's type is void. |
823 | */ |
824 | public JCStatement Call(JCExpression apply) { |
825 | return apply.type.tag == VOID ? Exec(apply) : Return(apply); |
826 | } |
827 | |
828 | /** Construct an assignment from a variable symbol and a right hand side. |
829 | */ |
830 | public JCStatement Assignment(Symbol v, JCExpression rhs) { |
831 | return Exec(Assign(Ident(v), rhs).setType(v.type)); |
832 | } |
833 | |
834 | /** Construct an index expression from a variable and an expression. |
835 | */ |
836 | public JCArrayAccess Indexed(Symbol v, JCExpression index) { |
837 | JCArrayAccess tree = new JCArrayAccess(QualIdent(v), index); |
838 | tree.type = ((ArrayType)v.type).elemtype; |
839 | return tree; |
840 | } |
841 | |
842 | /** Make an attributed type cast expression. |
843 | */ |
844 | public JCTypeCast TypeCast(Type type, JCExpression expr) { |
845 | return (JCTypeCast)TypeCast(Type(type), expr).setType(type); |
846 | } |
847 | |
848 | /* *************************************************************************** |
849 | * Helper methods. |
850 | ****************************************************************************/ |
851 | |
852 | /** Can given symbol be referred to in unqualified form? |
853 | */ |
854 | boolean isUnqualifiable(Symbol sym) { |
855 | if (sym.name == names.empty || |
856 | sym.owner == null || |
857 | sym.owner.kind == MTH || sym.owner.kind == VAR) { |
858 | return true; |
859 | } else if (sym.kind == TYP && toplevel != null) { |
860 | Scope.Entry e; |
861 | e = toplevel.namedImportScope.lookup(sym.name); |
862 | if (e.scope != null) { |
863 | return |
864 | e.sym == sym && |
865 | e.next().scope == null; |
866 | } |
867 | e = toplevel.packge.members().lookup(sym.name); |
868 | if (e.scope != null) { |
869 | return |
870 | e.sym == sym && |
871 | e.next().scope == null; |
872 | } |
873 | e = toplevel.starImportScope.lookup(sym.name); |
874 | if (e.scope != null) { |
875 | return |
876 | e.sym == sym && |
877 | e.next().scope == null; |
878 | } |
879 | } |
880 | return false; |
881 | } |
882 | |
883 | /** The name of synthetic parameter number `i'. |
884 | */ |
885 | public Name paramName(int i) { return names.fromString("x" + i); } |
886 | |
887 | /** The name of synthetic type parameter number `i'. |
888 | */ |
889 | public Name typaramName(int i) { return names.fromString("A" + i); } |
890 | } |