1 /*
2 * Copyright (c) 1999, 2011, 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 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 supported API.
43 * If 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 Names 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 = Names.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, Names 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.checkNonNull(packageAnnotations);
126 for (JCTree node : defs)
127 Assert.check(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 JCExpression 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 JCMethodDecl tree = new JCMethodDecl(mods,
173 name,
174 restype,
175 typarams,
176 params,
177 thrown,
178 body,
179 defaultValue,
180 null);
181 tree.pos = pos;
182 return tree;
183 }
184
185 public JCVariableDecl VarDef(JCModifiers mods, Name name, JCExpression vartype, JCExpression init) {
186 JCVariableDecl tree = new JCVariableDecl(mods, name, vartype, init, null);
187 tree.pos = pos;
188 return tree;
189 }
190
191 public JCSkip Skip() {
192 JCSkip tree = new JCSkip();
193 tree.pos = pos;
194 return tree;
195 }
196
197 public JCBlock Block(long flags, List<JCStatement> stats) {
198 JCBlock tree = new JCBlock(flags, stats);
199 tree.pos = pos;
200 return tree;
201 }
202
203 public JCDoWhileLoop DoLoop(JCStatement body, JCExpression cond) {
204 JCDoWhileLoop tree = new JCDoWhileLoop(body, cond);
205 tree.pos = pos;
206 return tree;
207 }
208
209 public JCWhileLoop WhileLoop(JCExpression cond, JCStatement body) {
210 JCWhileLoop tree = new JCWhileLoop(cond, body);
211 tree.pos = pos;
212 return tree;
213 }
214
215 public JCForLoop ForLoop(List<JCStatement> init,
216 JCExpression cond,
217 List<JCExpressionStatement> step,
218 JCStatement body)
219 {
220 JCForLoop tree = new JCForLoop(init, cond, step, body);
221 tree.pos = pos;
222 return tree;
223 }
224
225 public JCEnhancedForLoop ForeachLoop(JCVariableDecl var, JCExpression expr, JCStatement body) {
226 JCEnhancedForLoop tree = new JCEnhancedForLoop(var, expr, body);
227 tree.pos = pos;
228 return tree;
229 }
230
231 public JCLabeledStatement Labelled(Name label, JCStatement body) {
232 JCLabeledStatement tree = new JCLabeledStatement(label, body);
233 tree.pos = pos;
234 return tree;
235 }
236
237 public JCSwitch Switch(JCExpression selector, List<JCCase> cases) {
238 JCSwitch tree = new JCSwitch(selector, cases);
239 tree.pos = pos;
240 return tree;
241 }
242
243 public JCCase Case(JCExpression pat, List<JCStatement> stats) {
244 JCCase tree = new JCCase(pat, stats);
245 tree.pos = pos;
246 return tree;
247 }
248
249 public JCSynchronized Synchronized(JCExpression lock, JCBlock body) {
250 JCSynchronized tree = new JCSynchronized(lock, body);
251 tree.pos = pos;
252 return tree;
253 }
254
255 public JCTry Try(JCBlock body, List<JCCatch> catchers, JCBlock finalizer) {
256 return Try(List.<JCTree>nil(), body, catchers, finalizer);
257 }
258
259 public JCTry Try(List<JCTree> resources,
260 JCBlock body,
261 List<JCCatch> catchers,
262 JCBlock finalizer) {
263 JCTry tree = new JCTry(resources, body, catchers, finalizer);
264 tree.pos = pos;
265 return tree;
266 }
267
268 public JCCatch Catch(JCVariableDecl param, JCBlock body) {
269 JCCatch tree = new JCCatch(param, body);
270 tree.pos = pos;
271 return tree;
272 }
273
274 public JCConditional Conditional(JCExpression cond,
275 JCExpression thenpart,
276 JCExpression elsepart)
277 {
278 JCConditional tree = new JCConditional(cond, thenpart, elsepart);
279 tree.pos = pos;
280 return tree;
281 }
282
283 public JCIf If(JCExpression cond, JCStatement thenpart, JCStatement elsepart) {
284 JCIf tree = new JCIf(cond, thenpart, elsepart);
285 tree.pos = pos;
286 return tree;
287 }
288
289 public JCExpressionStatement Exec(JCExpression expr) {
290 JCExpressionStatement tree = new JCExpressionStatement(expr);
291 tree.pos = pos;
292 return tree;
293 }
294
295 public JCBreak Break(Name label) {
296 JCBreak tree = new JCBreak(label, null);
297 tree.pos = pos;
298 return tree;
299 }
300
301 public JCContinue Continue(Name label) {
302 JCContinue tree = new JCContinue(label, null);
303 tree.pos = pos;
304 return tree;
305 }
306
307 public JCReturn Return(JCExpression expr) {
308 JCReturn tree = new JCReturn(expr);
309 tree.pos = pos;
310 return tree;
311 }
312
313 public JCThrow Throw(JCTree expr) {
314 JCThrow tree = new JCThrow(expr);
315 tree.pos = pos;
316 return tree;
317 }
318
319 public JCAssert Assert(JCExpression cond, JCExpression detail) {
320 JCAssert tree = new JCAssert(cond, detail);
321 tree.pos = pos;
322 return tree;
323 }
324
325 public JCMethodInvocation Apply(List<JCExpression> typeargs,
326 JCExpression fn,
327 List<JCExpression> args)
328 {
329 JCMethodInvocation tree = new JCMethodInvocation(typeargs, fn, args);
330 tree.pos = pos;
331 return tree;
332 }
333
334 public JCNewClass NewClass(JCExpression encl,
335 List<JCExpression> typeargs,
336 JCExpression clazz,
337 List<JCExpression> args,
338 JCClassDecl def)
339 {
340 JCNewClass tree = new JCNewClass(encl, typeargs, clazz, args, def);
341 tree.pos = pos;
342 return tree;
343 }
344
345 public JCNewArray NewArray(JCExpression elemtype,
346 List<JCExpression> dims,
347 List<JCExpression> elems)
348 {
349 JCNewArray tree = new JCNewArray(elemtype, dims, elems);
350 tree.pos = pos;
351 return tree;
352 }
353
354 public JCParens Parens(JCExpression expr) {
355 JCParens tree = new JCParens(expr);
356 tree.pos = pos;
357 return tree;
358 }
359
360 public JCAssign Assign(JCExpression lhs, JCExpression rhs) {
361 JCAssign tree = new JCAssign(lhs, rhs);
362 tree.pos = pos;
363 return tree;
364 }
365
366 public JCAssignOp Assignop(JCTree.Tag opcode, JCTree lhs, JCTree rhs) {
367 JCAssignOp tree = new JCAssignOp(opcode, lhs, rhs, null);
368 tree.pos = pos;
369 return tree;
370 }
371
372 public JCUnary Unary(JCTree.Tag opcode, JCExpression arg) {
373 JCUnary tree = new JCUnary(opcode, arg);
374 tree.pos = pos;
375 return tree;
376 }
377
378 public JCBinary Binary(JCTree.Tag opcode, JCExpression lhs, JCExpression rhs) {
379 JCBinary tree = new JCBinary(opcode, lhs, rhs, null);
380 tree.pos = pos;
381 return tree;
382 }
383
384 public JCTypeCast TypeCast(JCTree clazz, JCExpression expr) {
385 JCTypeCast tree = new JCTypeCast(clazz, expr);
386 tree.pos = pos;
387 return tree;
388 }
389
390 public JCInstanceOf TypeTest(JCExpression expr, JCTree clazz) {
391 JCInstanceOf tree = new JCInstanceOf(expr, clazz);
392 tree.pos = pos;
393 return tree;
394 }
395
396 public JCArrayAccess Indexed(JCExpression indexed, JCExpression index) {
397 JCArrayAccess tree = new JCArrayAccess(indexed, index);
398 tree.pos = pos;
399 return tree;
400 }
401
402 public JCFieldAccess Select(JCExpression selected, Name selector) {
403 JCFieldAccess tree = new JCFieldAccess(selected, selector, null);
404 tree.pos = pos;
405 return tree;
406 }
407
408 public JCIdent Ident(Name name) {
409 JCIdent tree = new JCIdent(name, null);
410 tree.pos = pos;
411 return tree;
412 }
413
414 public JCLiteral Literal(int tag, Object value) {
415 JCLiteral tree = new JCLiteral(tag, value);
416 tree.pos = pos;
417 return tree;
418 }
419
420 public JCPrimitiveTypeTree TypeIdent(int typetag) {
421 JCPrimitiveTypeTree tree = new JCPrimitiveTypeTree(typetag);
422 tree.pos = pos;
423 return tree;
424 }
425
426 public JCArrayTypeTree TypeArray(JCExpression elemtype) {
427 JCArrayTypeTree tree = new JCArrayTypeTree(elemtype);
428 tree.pos = pos;
429 return tree;
430 }
431
432 public JCTypeApply TypeApply(JCExpression clazz, List<JCExpression> arguments) {
433 JCTypeApply tree = new JCTypeApply(clazz, arguments);
434 tree.pos = pos;
435 return tree;
436 }
437
438 public JCTypeUnion TypeUnion(List<JCExpression> components) {
439 JCTypeUnion tree = new JCTypeUnion(components);
440 tree.pos = pos;
441 return tree;
442 }
443
444 public JCTypeParameter TypeParameter(Name name, List<JCExpression> bounds) {
445 JCTypeParameter tree = new JCTypeParameter(name, bounds);
446 tree.pos = pos;
447 return tree;
448 }
449
450 public JCWildcard Wildcard(TypeBoundKind kind, JCTree type) {
451 JCWildcard tree = new JCWildcard(kind, type);
452 tree.pos = pos;
453 return tree;
454 }
455
456 public TypeBoundKind TypeBoundKind(BoundKind kind) {
457 TypeBoundKind tree = new TypeBoundKind(kind);
458 tree.pos = pos;
459 return tree;
460 }
461
462 public JCAnnotation Annotation(JCTree annotationType, List<JCExpression> args) {
463 JCAnnotation tree = new JCAnnotation(annotationType, args);
464 tree.pos = pos;
465 return tree;
466 }
467
468 public JCModifiers Modifiers(long flags, List<JCAnnotation> annotations) {
469 JCModifiers tree = new JCModifiers(flags, annotations);
470 boolean noFlags = (flags & (Flags.ModifierFlags | Flags.ANNOTATION)) == 0;
471 tree.pos = (noFlags && annotations.isEmpty()) ? Position.NOPOS : pos;
472 return tree;
473 }
474
475 public JCModifiers Modifiers(long flags) {
476 return Modifiers(flags, List.<JCAnnotation>nil());
477 }
478
479 public JCErroneous Erroneous() {
480 return Erroneous(List.<JCTree>nil());
481 }
482
483 public JCErroneous Erroneous(List<? extends JCTree> errs) {
484 JCErroneous tree = new JCErroneous(errs);
485 tree.pos = pos;
486 return tree;
487 }
488
489 public LetExpr LetExpr(List<JCVariableDecl> defs, JCTree expr) {
490 LetExpr tree = new LetExpr(defs, expr);
491 tree.pos = pos;
492 return tree;
493 }
494
495 /* ***************************************************************************
496 * Derived building blocks.
497 ****************************************************************************/
498
499 public JCClassDecl AnonymousClassDef(JCModifiers mods,
500 List<JCTree> defs)
501 {
502 return ClassDef(mods,
503 names.empty,
504 List.<JCTypeParameter>nil(),
505 null,
506 List.<JCExpression>nil(),
507 defs);
508 }
509
510 public LetExpr LetExpr(JCVariableDecl def, JCTree expr) {
511 LetExpr tree = new LetExpr(List.of(def), expr);
512 tree.pos = pos;
513 return tree;
514 }
515
516 /** Create an identifier from a symbol.
517 */
518 public JCIdent Ident(Symbol sym) {
519 return (JCIdent)new JCIdent((sym.name != names.empty)
520 ? sym.name
521 : sym.flatName(), sym)
522 .setPos(pos)
523 .setType(sym.type);
524 }
525
526 /** Create a selection node from a qualifier tree and a symbol.
527 * @param base The qualifier tree.
528 */
529 public JCExpression Select(JCExpression base, Symbol sym) {
530 return new JCFieldAccess(base, sym.name, sym).setPos(pos).setType(sym.type);
531 }
532
533 /** Create a qualified identifier from a symbol, adding enough qualifications
534 * to make the reference unique.
535 */
536 public JCExpression QualIdent(Symbol sym) {
537 return isUnqualifiable(sym)
538 ? Ident(sym)
539 : Select(QualIdent(sym.owner), sym);
540 }
541
542 /** Create an identifier that refers to the variable declared in given variable
543 * declaration.
544 */
545 public JCExpression Ident(JCVariableDecl param) {
546 return Ident(param.sym);
547 }
548
549 /** Create a list of identifiers referring to the variables declared
550 * in given list of variable declarations.
551 */
552 public List<JCExpression> Idents(List<JCVariableDecl> params) {
553 ListBuffer<JCExpression> ids = new ListBuffer<JCExpression>();
554 for (List<JCVariableDecl> l = params; l.nonEmpty(); l = l.tail)
555 ids.append(Ident(l.head));
556 return ids.toList();
557 }
558
559 /** Create a tree representing `this', given its type.
560 */
561 public JCExpression This(Type t) {
562 return Ident(new VarSymbol(FINAL, names._this, t, t.tsym));
563 }
564
565 /** Create a tree representing a class literal.
566 */
567 public JCExpression ClassLiteral(ClassSymbol clazz) {
568 return ClassLiteral(clazz.type);
569 }
570
571 /** Create a tree representing a class literal.
572 */
573 public JCExpression ClassLiteral(Type t) {
574 VarSymbol lit = new VarSymbol(STATIC | PUBLIC | FINAL,
575 names._class,
576 t,
577 t.tsym);
578 return Select(Type(t), lit);
579 }
580
581 /** Create a tree representing `super', given its type and owner.
582 */
583 public JCIdent Super(Type t, TypeSymbol owner) {
584 return Ident(new VarSymbol(FINAL, names._super, t, owner));
585 }
586
587 /**
588 * Create a method invocation from a method tree and a list of
589 * argument trees.
590 */
591 public JCMethodInvocation App(JCExpression meth, List<JCExpression> args) {
592 return Apply(null, meth, args).setType(meth.type.getReturnType());
593 }
594
595 /**
596 * Create a no-arg method invocation from a method tree
597 */
598 public JCMethodInvocation App(JCExpression meth) {
599 return Apply(null, meth, List.<JCExpression>nil()).setType(meth.type.getReturnType());
600 }
601
602 /** Create a method invocation from a method tree and a list of argument trees.
603 */
604 public JCExpression Create(Symbol ctor, List<JCExpression> args) {
605 Type t = ctor.owner.erasure(types);
606 JCNewClass newclass = NewClass(null, null, Type(t), args, null);
607 newclass.constructor = ctor;
608 newclass.setType(t);
609 return newclass;
610 }
611
612 /** Create a tree representing given type.
613 */
614 public JCExpression Type(Type t) {
615 if (t == null) return null;
616 JCExpression tp;
617 switch (t.tag) {
618 case BYTE: case CHAR: case SHORT: case INT: case LONG: case FLOAT:
619 case DOUBLE: case BOOLEAN: case VOID:
620 tp = TypeIdent(t.tag);
621 break;
622 case TYPEVAR:
623 tp = Ident(t.tsym);
624 break;
625 case WILDCARD: {
626 WildcardType a = ((WildcardType) t);
627 tp = Wildcard(TypeBoundKind(a.kind), Type(a.type));
628 break;
629 }
630 case CLASS:
631 Type outer = t.getEnclosingType();
632 JCExpression clazz = outer.tag == CLASS && t.tsym.owner.kind == TYP
633 ? Select(Type(outer), t.tsym)
634 : QualIdent(t.tsym);
635 tp = t.getTypeArguments().isEmpty()
636 ? clazz
637 : TypeApply(clazz, Types(t.getTypeArguments()));
638 break;
639 case ARRAY:
640 tp = TypeArray(Type(types.elemtype(t)));
641 break;
642 case ERROR:
643 tp = TypeIdent(ERROR);
644 break;
645 default:
646 throw new AssertionError("unexpected type: " + t);
647 }
648 return tp.setType(t);
649 }
650
651 /** Create a list of trees representing given list of types.
652 */
653 public List<JCExpression> Types(List<Type> ts) {
654 ListBuffer<JCExpression> lb = new ListBuffer<JCExpression>();
655 for (List<Type> l = ts; l.nonEmpty(); l = l.tail)
656 lb.append(Type(l.head));
657 return lb.toList();
658 }
659
660 /** Create a variable definition from a variable symbol and an initializer
661 * expression.
662 */
663 public JCVariableDecl VarDef(VarSymbol v, JCExpression init) {
664 return (JCVariableDecl)
665 new JCVariableDecl(
666 Modifiers(v.flags(), Annotations(v.getAnnotationMirrors())),
667 v.name,
668 Type(v.type),
669 init,
670 v).setPos(pos).setType(v.type);
671 }
672
673 /** Create annotation trees from annotations.
674 */
675 public List<JCAnnotation> Annotations(List<Attribute.Compound> attributes) {
676 if (attributes == null) return List.nil();
677 ListBuffer<JCAnnotation> result = new ListBuffer<JCAnnotation>();
678 for (List<Attribute.Compound> i = attributes; i.nonEmpty(); i=i.tail) {
679 Attribute a = i.head;
680 result.append(Annotation(a));
681 }
682 return result.toList();
683 }
684
685 public JCLiteral Literal(Object value) {
686 JCLiteral result = null;
687 if (value instanceof String) {
688 result = Literal(CLASS, value).
689 setType(syms.stringType.constType(value));
690 } else if (value instanceof Integer) {
691 result = Literal(INT, value).
692 setType(syms.intType.constType(value));
693 } else if (value instanceof Long) {
694 result = Literal(LONG, value).
695 setType(syms.longType.constType(value));
696 } else if (value instanceof Byte) {
697 result = Literal(BYTE, value).
698 setType(syms.byteType.constType(value));
699 } else if (value instanceof Character) {
700 int v = (int) (((Character) value).toString().charAt(0));
701 result = Literal(CHAR, value).
702 setType(syms.charType.constType(v));
703 } else if (value instanceof Double) {
704 result = Literal(DOUBLE, value).
705 setType(syms.doubleType.constType(value));
706 } else if (value instanceof Float) {
707 result = Literal(FLOAT, value).
708 setType(syms.floatType.constType(value));
709 } else if (value instanceof Short) {
710 result = Literal(SHORT, value).
711 setType(syms.shortType.constType(value));
712 } else if (value instanceof Boolean) {
713 int v = ((Boolean) value) ? 1 : 0;
714 result = Literal(BOOLEAN, v).
715 setType(syms.booleanType.constType(v));
716 } else {
717 throw new AssertionError(value);
718 }
719 return result;
720 }
721
722 class AnnotationBuilder implements Attribute.Visitor {
723 JCExpression result = null;
724 public void visitConstant(Attribute.Constant v) {
725 result = Literal(v.value);
726 }
727 public void visitClass(Attribute.Class clazz) {
728 result = ClassLiteral(clazz.type).setType(syms.classType);
729 }
730 public void visitEnum(Attribute.Enum e) {
731 result = QualIdent(e.value);
732 }
733 public void visitError(Attribute.Error e) {
734 result = Erroneous();
735 }
736 public void visitCompound(Attribute.Compound compound) {
737 result = visitCompoundInternal(compound);
738 }
739 public JCAnnotation visitCompoundInternal(Attribute.Compound compound) {
740 ListBuffer<JCExpression> args = new ListBuffer<JCExpression>();
741 for (List<Pair<Symbol.MethodSymbol,Attribute>> values = compound.values; values.nonEmpty(); values=values.tail) {
742 Pair<MethodSymbol,Attribute> pair = values.head;
743 JCExpression valueTree = translate(pair.snd);
744 args.append(Assign(Ident(pair.fst), valueTree).setType(valueTree.type));
745 }
746 return Annotation(Type(compound.type), args.toList());
747 }
748 public void visitArray(Attribute.Array array) {
749 ListBuffer<JCExpression> elems = new ListBuffer<JCExpression>();
750 for (int i = 0; i < array.values.length; i++)
751 elems.append(translate(array.values[i]));
752 result = NewArray(null, List.<JCExpression>nil(), elems.toList()).setType(array.type);
753 }
754 JCExpression translate(Attribute a) {
755 a.accept(this);
756 return result;
757 }
758 JCAnnotation translate(Attribute.Compound a) {
759 return visitCompoundInternal(a);
760 }
761 }
762 AnnotationBuilder annotationBuilder = new AnnotationBuilder();
763
764 /** Create an annotation tree from an attribute.
765 */
766 public JCAnnotation Annotation(Attribute a) {
767 return annotationBuilder.translate((Attribute.Compound)a);
768 }
769
770 /** Create a method definition from a method symbol and a method body.
771 */
772 public JCMethodDecl MethodDef(MethodSymbol m, JCBlock body) {
773 return MethodDef(m, m.type, body);
774 }
775
776 /** Create a method definition from a method symbol, method type
777 * and a method body.
778 */
779 public JCMethodDecl MethodDef(MethodSymbol m, Type mtype, JCBlock body) {
780 return (JCMethodDecl)
781 new JCMethodDecl(
782 Modifiers(m.flags(), Annotations(m.getAnnotationMirrors())),
783 m.name,
784 Type(mtype.getReturnType()),
785 TypeParams(mtype.getTypeArguments()),
786 Params(mtype.getParameterTypes(), m),
787 Types(mtype.getThrownTypes()),
788 body,
789 null,
790 m).setPos(pos).setType(mtype);
791 }
792
793 /** Create a type parameter tree from its name and type.
794 */
795 public JCTypeParameter TypeParam(Name name, TypeVar tvar) {
796 return (JCTypeParameter)
797 TypeParameter(name, Types(types.getBounds(tvar))).setPos(pos).setType(tvar);
798 }
799
800 /** Create a list of type parameter trees from a list of type variables.
801 */
802 public List<JCTypeParameter> TypeParams(List<Type> typarams) {
803 ListBuffer<JCTypeParameter> tparams = new ListBuffer<JCTypeParameter>();
804 int i = 0;
805 for (List<Type> l = typarams; l.nonEmpty(); l = l.tail)
806 tparams.append(TypeParam(l.head.tsym.name, (TypeVar)l.head));
807 return tparams.toList();
808 }
809
810 /** Create a value parameter tree from its name, type, and owner.
811 */
812 public JCVariableDecl Param(Name name, Type argtype, Symbol owner) {
813 return VarDef(new VarSymbol(0, name, argtype, owner), null);
814 }
815
816 /** Create a a list of value parameter trees x0, ..., xn from a list of
817 * their types and an their owner.
818 */
819 public List<JCVariableDecl> Params(List<Type> argtypes, Symbol owner) {
820 ListBuffer<JCVariableDecl> params = new ListBuffer<JCVariableDecl>();
821 MethodSymbol mth = (owner.kind == MTH) ? ((MethodSymbol)owner) : null;
822 if (mth != null && mth.params != null && argtypes.length() == mth.params.length()) {
823 for (VarSymbol param : ((MethodSymbol)owner).params)
824 params.append(VarDef(param, null));
825 } else {
826 int i = 0;
827 for (List<Type> l = argtypes; l.nonEmpty(); l = l.tail)
828 params.append(Param(paramName(i++), l.head, owner));
829 }
830 return params.toList();
831 }
832
833 /** Wrap a method invocation in an expression statement or return statement,
834 * depending on whether the method invocation expression's type is void.
835 */
836 public JCStatement Call(JCExpression apply) {
837 return apply.type.tag == VOID ? Exec(apply) : Return(apply);
838 }
839
840 /** Construct an assignment from a variable symbol and a right hand side.
841 */
842 public JCStatement Assignment(Symbol v, JCExpression rhs) {
843 return Exec(Assign(Ident(v), rhs).setType(v.type));
844 }
845
846 /** Construct an index expression from a variable and an expression.
847 */
848 public JCArrayAccess Indexed(Symbol v, JCExpression index) {
849 JCArrayAccess tree = new JCArrayAccess(QualIdent(v), index);
850 tree.type = ((ArrayType)v.type).elemtype;
851 return tree;
852 }
853
854 /** Make an attributed type cast expression.
855 */
856 public JCTypeCast TypeCast(Type type, JCExpression expr) {
857 return (JCTypeCast)TypeCast(Type(type), expr).setType(type);
858 }
859
860 /* ***************************************************************************
861 * Helper methods.
862 ****************************************************************************/
863
864 /** Can given symbol be referred to in unqualified form?
865 */
866 boolean isUnqualifiable(Symbol sym) {
867 if (sym.name == names.empty ||
868 sym.owner == null ||
869 sym.owner.kind == MTH || sym.owner.kind == VAR) {
870 return true;
871 } else if (sym.kind == TYP && toplevel != null) {
872 Scope.Entry e;
873 e = toplevel.namedImportScope.lookup(sym.name);
874 if (e.scope != null) {
875 return
876 e.sym == sym &&
877 e.next().scope == null;
878 }
879 e = toplevel.packge.members().lookup(sym.name);
880 if (e.scope != null) {
881 return
882 e.sym == sym &&
883 e.next().scope == null;
884 }
885 e = toplevel.starImportScope.lookup(sym.name);
886 if (e.scope != null) {
887 return
888 e.sym == sym &&
889 e.next().scope == null;
890 }
891 }
892 return false;
893 }
894
895 /** The name of synthetic parameter number `i'.
896 */
897 public Name paramName(int i) { return names.fromString("x" + i); }
898
899 /** The name of synthetic type parameter number `i'.
900 */
901 public Name typaramName(int i) { return names.fromString("A" + i); }
902 }