1 /*
2 * Copyright (c) 1999, 2017, 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.io.*;
29
30 import com.sun.source.tree.MemberReferenceTree.ReferenceMode;
31 import com.sun.source.tree.ModuleTree.ModuleKind;
32 import com.sun.tools.javac.code.*;
33 import com.sun.tools.javac.tree.JCTree.*;
34 import com.sun.tools.javac.util.*;
35 import com.sun.tools.javac.util.List;
36 import static com.sun.tools.javac.code.Flags.*;
37 import static com.sun.tools.javac.code.Flags.ANNOTATION;
38 import static com.sun.tools.javac.tree.JCTree.Tag.*;
39
40 /** Prints out a tree as an indented Java source program.
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 Pretty extends JCTree.Visitor {
48
49 public Pretty(Writer out, boolean sourceOutput) {
50 this.out = out;
51 this.sourceOutput = sourceOutput;
52 }
53
54 /** Set when we are producing source output. If we're not
55 * producing source output, we can sometimes give more detail in
56 * the output even though that detail would not be valid java
57 * source.
58 */
59 private final boolean sourceOutput;
60
61 /** The output stream on which trees are printed.
62 */
63 Writer out;
64
65 /** Indentation width (can be reassigned from outside).
66 */
67 public int width = 4;
68
69 /** The current left margin.
70 */
71 int lmargin = 0;
72
73 /** The enclosing class name.
74 */
75 Name enclClassName;
76
77 /** A table mapping trees to their documentation comments
78 * (can be null)
79 */
80 DocCommentTable docComments = null;
81
82 /**
83 * A string sequence to be used when Pretty output should be constrained
84 * to fit into a given size
85 */
86 private final static String trimSequence = "[...]";
87
88 /**
89 * Max number of chars to be generated when output should fit into a single line
90 */
91 private final static int PREFERRED_LENGTH = 20;
92
93 /** Align code to be indented to left margin.
94 */
95 void align() throws IOException {
96 for (int i = 0; i < lmargin; i++) out.write(" ");
97 }
98
99 /** Increase left margin by indentation width.
100 */
101 void indent() {
102 lmargin = lmargin + width;
103 }
104
105 /** Decrease left margin by indentation width.
106 */
107 void undent() {
108 lmargin = lmargin - width;
109 }
110
111 /** Enter a new precedence level. Emit a `(' if new precedence level
112 * is less than precedence level so far.
113 * @param contextPrec The precedence level in force so far.
114 * @param ownPrec The new precedence level.
115 */
116 void open(int contextPrec, int ownPrec) throws IOException {
117 if (ownPrec < contextPrec) out.write("(");
118 }
119
120 /** Leave precedence level. Emit a `(' if inner precedence level
121 * is less than precedence level we revert to.
122 * @param contextPrec The precedence level we revert to.
123 * @param ownPrec The inner precedence level.
124 */
125 void close(int contextPrec, int ownPrec) throws IOException {
126 if (ownPrec < contextPrec) out.write(")");
127 }
128
129 /** Print string, replacing all non-ascii character with unicode escapes.
130 */
131 public void print(Object s) throws IOException {
132 out.write(Convert.escapeUnicode(s.toString()));
133 }
134
135 /** Print new line.
136 */
137 public void println() throws IOException {
138 out.write(lineSep);
139 }
140
141 public static String toSimpleString(JCTree tree) {
142 return toSimpleString(tree, PREFERRED_LENGTH);
143 }
144
145 public static String toSimpleString(JCTree tree, int maxLength) {
146 StringWriter s = new StringWriter();
147 try {
148 new Pretty(s, false).printExpr(tree);
149 }
150 catch (IOException e) {
151 // should never happen, because StringWriter is defined
152 // never to throw any IOExceptions
153 throw new AssertionError(e);
154 }
155 //we need to (i) replace all line terminators with a space and (ii) remove
156 //occurrences of 'missing' in the Pretty output (generated when types are missing)
157 String res = s.toString().trim().replaceAll("\\s+", " ").replaceAll("/\\*missing\\*/", "");
158 if (res.length() < maxLength) {
159 return res;
160 } else {
161 int head = (maxLength - trimSequence.length()) * 2 / 3;
162 int tail = maxLength - trimSequence.length() - head;
163 return res.substring(0, head) + trimSequence + res.substring(res.length() - tail);
164 }
165 }
166
167 String lineSep = System.getProperty("line.separator");
168
169 /**************************************************************************
170 * Traversal methods
171 *************************************************************************/
172
173 /** Exception to propogate IOException through visitXXX methods */
174 private static class UncheckedIOException extends Error {
175 static final long serialVersionUID = -4032692679158424751L;
176 UncheckedIOException(IOException e) {
177 super(e.getMessage(), e);
178 }
179 }
180
181 /** Visitor argument: the current precedence level.
182 */
183 int prec;
184
185 /** Visitor method: print expression tree.
186 * @param prec The current precedence level.
187 */
188 public void printExpr(JCTree tree, int prec) throws IOException {
189 int prevPrec = this.prec;
190 try {
191 this.prec = prec;
192 if (tree == null) print("/*missing*/");
193 else {
194 tree.accept(this);
195 }
196 } catch (UncheckedIOException ex) {
197 IOException e = new IOException(ex.getMessage());
198 e.initCause(ex);
199 throw e;
200 } finally {
201 this.prec = prevPrec;
202 }
203 }
204
205 /** Derived visitor method: print expression tree at minimum precedence level
206 * for expression.
207 */
208 public void printExpr(JCTree tree) throws IOException {
209 printExpr(tree, TreeInfo.noPrec);
210 }
211
212 /** Derived visitor method: print statement tree.
213 */
214 public void printStat(JCTree tree) throws IOException {
215 printExpr(tree, TreeInfo.notExpression);
216 }
217
218 /** Derived visitor method: print list of expression trees, separated by given string.
219 * @param sep the separator string
220 */
221 public <T extends JCTree> void printExprs(List<T> trees, String sep) throws IOException {
222 if (trees.nonEmpty()) {
223 printExpr(trees.head);
224 for (List<T> l = trees.tail; l.nonEmpty(); l = l.tail) {
225 print(sep);
226 printExpr(l.head);
227 }
228 }
229 }
230
231 /** Derived visitor method: print list of expression trees, separated by commas.
232 */
233 public <T extends JCTree> void printExprs(List<T> trees) throws IOException {
234 printExprs(trees, ", ");
235 }
236
237 /** Derived visitor method: print list of statements, each on a separate line.
238 */
239 public void printStats(List<? extends JCTree> trees) throws IOException {
240 for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail) {
241 align();
242 printStat(l.head);
243 println();
244 }
245 }
246
247 /** Print a set of modifiers.
248 */
249 public void printFlags(long flags) throws IOException {
250 if ((flags & SYNTHETIC) != 0) print("/*synthetic*/ ");
251 print(TreeInfo.flagNames(flags));
252 if ((flags & ExtendedStandardFlags) != 0) print(" ");
253 if ((flags & ANNOTATION) != 0) print("@");
254 }
255
256 public void printAnnotations(List<JCAnnotation> trees) throws IOException {
257 for (List<JCAnnotation> l = trees; l.nonEmpty(); l = l.tail) {
258 printStat(l.head);
259 println();
260 align();
261 }
262 }
263
264 public void printTypeAnnotations(List<JCAnnotation> trees) throws IOException {
265 for (List<JCAnnotation> l = trees; l.nonEmpty(); l = l.tail) {
266 printExpr(l.head);
267 print(" ");
268 }
269 }
270
271 /** Print documentation comment, if it exists
272 * @param tree The tree for which a documentation comment should be printed.
273 */
274 public void printDocComment(JCTree tree) throws IOException {
275 if (docComments != null) {
276 String dc = docComments.getCommentText(tree);
277 if (dc != null) {
278 print("/**"); println();
279 int pos = 0;
280 int endpos = lineEndPos(dc, pos);
281 while (pos < dc.length()) {
282 align();
283 print(" *");
284 if (pos < dc.length() && dc.charAt(pos) > ' ') print(" ");
285 print(dc.substring(pos, endpos)); println();
286 pos = endpos + 1;
287 endpos = lineEndPos(dc, pos);
288 }
289 align(); print(" */"); println();
290 align();
291 }
292 }
293 }
294 //where
295 static int lineEndPos(String s, int start) {
296 int pos = s.indexOf('\n', start);
297 if (pos < 0) pos = s.length();
298 return pos;
299 }
300
301 /** If type parameter list is non-empty, print it enclosed in
302 * {@literal "<...>"} brackets.
303 */
304 public void printTypeParameters(List<JCTypeParameter> trees) throws IOException {
305 if (trees.nonEmpty()) {
306 print("<");
307 printExprs(trees);
308 print(">");
309 }
310 }
311
312 /** Print a block.
313 */
314 public void printBlock(List<? extends JCTree> stats) throws IOException {
315 print("{");
316 println();
317 indent();
318 printStats(stats);
319 undent();
320 align();
321 print("}");
322 }
323
324 /** Print a block.
325 */
326 public void printEnumBody(List<JCTree> stats) throws IOException {
327 print("{");
328 println();
329 indent();
330 boolean first = true;
331 for (List<JCTree> l = stats; l.nonEmpty(); l = l.tail) {
332 if (isEnumerator(l.head)) {
333 if (!first) {
334 print(",");
335 println();
336 }
337 align();
338 printStat(l.head);
339 first = false;
340 }
341 }
342 print(";");
343 println();
344 for (List<JCTree> l = stats; l.nonEmpty(); l = l.tail) {
345 if (!isEnumerator(l.head)) {
346 align();
347 printStat(l.head);
348 println();
349 }
350 }
351 undent();
352 align();
353 print("}");
354 }
355
356 /** Is the given tree an enumerator definition? */
357 boolean isEnumerator(JCTree t) {
358 return t.hasTag(VARDEF) && (((JCVariableDecl) t).mods.flags & ENUM) != 0;
359 }
360
361 /** Print unit consisting of package clause and import statements in toplevel,
362 * followed by class definition. if class definition == null,
363 * print all definitions in toplevel.
364 * @param tree The toplevel tree
365 * @param cdef The class definition, which is assumed to be part of the
366 * toplevel tree.
367 */
368 public void printUnit(JCCompilationUnit tree, JCClassDecl cdef) throws IOException {
369 docComments = tree.docComments;
370 printDocComment(tree);
371
372 boolean firstImport = true;
373 for (List<JCTree> l = tree.defs;
374 l.nonEmpty() &&
375 (cdef == null ||
376 l.head.hasTag(IMPORT) || l.head.hasTag(PACKAGEDEF));
377 l = l.tail) {
378 if (l.head.hasTag(IMPORT)) {
379 JCImport imp = (JCImport)l.head;
380 Name name = TreeInfo.name(imp.qualid);
381 if (name == name.table.names.asterisk ||
382 cdef == null ||
383 isUsed(TreeInfo.symbol(imp.qualid), cdef)) {
384 if (firstImport) {
385 firstImport = false;
386 println();
387 }
388 printStat(imp);
389 }
390 } else {
391 printStat(l.head);
392 }
393 }
394 if (cdef != null) {
395 printStat(cdef);
396 println();
397 }
398 }
399 // where
400 boolean isUsed(final Symbol t, JCTree cdef) {
401 class UsedVisitor extends TreeScanner {
402 public void scan(JCTree tree) {
403 if (tree!=null && !result) tree.accept(this);
404 }
405 boolean result = false;
406 public void visitIdent(JCIdent tree) {
407 if (tree.sym == t) result = true;
408 }
409 }
410 UsedVisitor v = new UsedVisitor();
411 v.scan(cdef);
412 return v.result;
413 }
414
415 /**************************************************************************
416 * Visitor methods
417 *************************************************************************/
418
419 public void visitTopLevel(JCCompilationUnit tree) {
420 try {
421 printUnit(tree, null);
422 } catch (IOException e) {
423 throw new UncheckedIOException(e);
424 }
425 }
426
427 public void visitPackageDef(JCPackageDecl tree) {
428 try {
429 printDocComment(tree);
430 printAnnotations(tree.annotations);
431 if (tree.pid != null) {
432 print("package ");
433 printExpr(tree.pid);
434 print(";");
435 println();
436 }
437 } catch (IOException e) {
438 throw new UncheckedIOException(e);
439 }
440 }
441
442 @Override
443 public void visitModuleDef(JCModuleDecl tree) {
444 try {
445 printDocComment(tree);
446 printAnnotations(tree.mods.annotations);
447 if (tree.getModuleType() == ModuleKind.OPEN) {
448 print("open ");
449 }
450 print("module ");
451 printExpr(tree.qualId);
452 if (tree.directives == null) {
453 print(";");
454 } else {
455 printBlock(tree.directives);
456 }
457 println();
458 } catch (IOException e) {
459 throw new UncheckedIOException(e);
460 }
461 }
462
463 @Override
464 public void visitExports(JCExports tree) {
465 try {
466 print("exports ");
467 printExpr(tree.qualid);
468 if (tree.moduleNames != null) {
469 print(" to ");
470 printExprs(tree.moduleNames);
471 }
472 print(";");
473 } catch (IOException e) {
474 throw new UncheckedIOException(e);
475 }
476 }
477
478 @Override
479 public void visitOpens(JCOpens tree) {
480 try {
481 print("opens ");
482 printExpr(tree.qualid);
483 if (tree.moduleNames != null) {
484 print(" to ");
485 printExprs(tree.moduleNames);
486 }
487 print(";");
488 } catch (IOException e) {
489 throw new UncheckedIOException(e);
490 }
491 }
492
493 @Override
494 public void visitProvides(JCProvides tree) {
495 try {
496 print("provides ");
497 printExpr(tree.serviceName);
498 print(" with ");
499 printExprs(tree.implNames);
500 print(";");
501 } catch (IOException e) {
502 throw new UncheckedIOException(e);
503 }
504 }
505
506 @Override
507 public void visitRequires(JCRequires tree) {
508 try {
509 print("requires ");
510 if (tree.isStaticPhase)
511 print("static ");
512 if (tree.isTransitive)
513 print("transitive ");
514 printExpr(tree.moduleName);
515 print(";");
516 } catch (IOException e) {
517 throw new UncheckedIOException(e);
518 }
519 }
520
521 @Override
522 public void visitUses(JCUses tree) {
523 try {
524 print("uses ");
525 printExpr(tree.qualid);
526 print(";");
527 } catch (IOException e) {
528 throw new UncheckedIOException(e);
529 }
530 }
531
532 public void visitImport(JCImport tree) {
533 try {
534 print("import ");
535 if (tree.staticImport) print("static ");
536 printExpr(tree.qualid);
537 print(";");
538 println();
539 } catch (IOException e) {
540 throw new UncheckedIOException(e);
541 }
542 }
543
544 public void visitClassDef(JCClassDecl tree) {
545 try {
546 println(); align();
547 printDocComment(tree);
548 printAnnotations(tree.mods.annotations);
549 printFlags(tree.mods.flags & ~INTERFACE);
550 Name enclClassNamePrev = enclClassName;
551 enclClassName = tree.name;
552 if ((tree.mods.flags & INTERFACE) != 0) {
553 print("interface " + tree.name);
554 printTypeParameters(tree.typarams);
555 if (tree.implementing.nonEmpty()) {
556 print(" extends ");
557 printExprs(tree.implementing);
558 }
559 } else {
560 if ((tree.mods.flags & ENUM) != 0)
561 print("enum " + tree.name);
562 else
563 print("class " + tree.name);
564 printTypeParameters(tree.typarams);
565 if (tree.extending != null) {
566 print(" extends ");
567 printExpr(tree.extending);
568 }
569 if (tree.implementing.nonEmpty()) {
570 print(" implements ");
571 printExprs(tree.implementing);
572 }
573 }
574 print(" ");
575 if ((tree.mods.flags & ENUM) != 0) {
576 printEnumBody(tree.defs);
577 } else {
578 printBlock(tree.defs);
579 }
580 enclClassName = enclClassNamePrev;
581 } catch (IOException e) {
582 throw new UncheckedIOException(e);
583 }
584 }
585
586 public void visitMethodDef(JCMethodDecl tree) {
587 try {
588 // when producing source output, omit anonymous constructors
589 if (tree.name == tree.name.table.names.init &&
590 enclClassName == null &&
591 sourceOutput) return;
592 println(); align();
593 printDocComment(tree);
594 printExpr(tree.mods);
595 printTypeParameters(tree.typarams);
596 if (tree.name == tree.name.table.names.init) {
597 print(enclClassName != null ? enclClassName : tree.name);
598 } else {
599 printExpr(tree.restype);
600 print(" " + tree.name);
601 }
602 print("(");
603 if (tree.recvparam!=null) {
604 printExpr(tree.recvparam);
605 if (tree.params.size() > 0) {
606 print(", ");
607 }
608 }
609 printExprs(tree.params);
610 print(")");
611 if (tree.thrown.nonEmpty()) {
612 print(" throws ");
613 printExprs(tree.thrown);
614 }
615 if (tree.defaultValue != null) {
616 print(" default ");
617 printExpr(tree.defaultValue);
618 }
619 if (tree.body != null) {
620 print(" ");
621 printStat(tree.body);
622 } else {
623 print(";");
624 }
625 } catch (IOException e) {
626 throw new UncheckedIOException(e);
627 }
628 }
629
630 public void visitVarDef(JCVariableDecl tree) {
631 try {
632 if (docComments != null && docComments.hasComment(tree)) {
633 println(); align();
634 }
635 printDocComment(tree);
636 if ((tree.mods.flags & ENUM) != 0) {
637 print("/*public static final*/ ");
638 print(tree.name);
639 if (tree.init != null) {
640 if (sourceOutput && tree.init.hasTag(NEWCLASS)) {
641 print(" /*enum*/ ");
642 JCNewClass init = (JCNewClass) tree.init;
643 if (init.args != null && init.args.nonEmpty()) {
644 print("(");
645 print(init.args);
646 print(")");
647 }
648 if (init.def != null && init.def.defs != null) {
649 print(" ");
650 printBlock(init.def.defs);
651 }
652 return;
653 }
654 print(" /* = ");
655 printExpr(tree.init);
656 print(" */");
657 }
658 } else {
659 printExpr(tree.mods);
660 if ((tree.mods.flags & VARARGS) != 0) {
661 JCTree vartype = tree.vartype;
662 List<JCAnnotation> tas = null;
663 if (vartype instanceof JCAnnotatedType) {
664 tas = ((JCAnnotatedType)vartype).annotations;
665 vartype = ((JCAnnotatedType)vartype).underlyingType;
666 }
667 printExpr(((JCArrayTypeTree) vartype).elemtype);
668 if (tas != null) {
669 print(' ');
670 printTypeAnnotations(tas);
671 }
672 print("... " + tree.name);
673 } else {
674 printExpr(tree.vartype);
675 print(" " + tree.name);
676 }
677 if (tree.init != null) {
678 print(" = ");
679 printExpr(tree.init);
680 }
681 if (prec == TreeInfo.notExpression) print(";");
682 }
683 } catch (IOException e) {
684 throw new UncheckedIOException(e);
685 }
686 }
687
688 public void visitSkip(JCSkip tree) {
689 try {
690 print(";");
691 } catch (IOException e) {
692 throw new UncheckedIOException(e);
693 }
694 }
695
696 public void visitBlock(JCBlock tree) {
697 try {
698 printFlags(tree.flags);
699 printBlock(tree.stats);
700 } catch (IOException e) {
701 throw new UncheckedIOException(e);
702 }
703 }
704
705 public void visitDoLoop(JCDoWhileLoop tree) {
706 try {
707 print("do ");
708 printStat(tree.body);
709 align();
710 print(" while ");
711 if (tree.cond.hasTag(PARENS)) {
712 printExpr(tree.cond);
713 } else {
714 print("(");
715 printExpr(tree.cond);
716 print(")");
717 }
718 print(";");
719 } catch (IOException e) {
720 throw new UncheckedIOException(e);
721 }
722 }
723
724 public void visitWhileLoop(JCWhileLoop tree) {
725 try {
726 print("while ");
727 if (tree.cond.hasTag(PARENS)) {
728 printExpr(tree.cond);
729 } else {
730 print("(");
731 printExpr(tree.cond);
732 print(")");
733 }
734 print(" ");
735 printStat(tree.body);
736 } catch (IOException e) {
737 throw new UncheckedIOException(e);
738 }
739 }
740
741 public void visitForLoop(JCForLoop tree) {
742 try {
743 print("for (");
744 if (tree.init.nonEmpty()) {
745 if (tree.init.head.hasTag(VARDEF)) {
746 printExpr(tree.init.head);
747 for (List<JCStatement> l = tree.init.tail; l.nonEmpty(); l = l.tail) {
748 JCVariableDecl vdef = (JCVariableDecl)l.head;
749 print(", " + vdef.name);
750 if (vdef.init != null) {
751 print(" = ");
752 printExpr(vdef.init);
753 }
754 }
755 } else {
756 printExprs(tree.init);
757 }
758 }
759 print("; ");
760 if (tree.cond != null) printExpr(tree.cond);
761 print("; ");
762 printExprs(tree.step);
763 print(") ");
764 printStat(tree.body);
765 } catch (IOException e) {
766 throw new UncheckedIOException(e);
767 }
768 }
769
770 public void visitForeachLoop(JCEnhancedForLoop tree) {
771 try {
772 print("for (");
773 printExpr(tree.var);
774 print(" : ");
775 printExpr(tree.expr);
776 print(") ");
777 printStat(tree.body);
778 } catch (IOException e) {
779 throw new UncheckedIOException(e);
780 }
781 }
782
783 public void visitLabelled(JCLabeledStatement tree) {
784 try {
785 print(tree.label + ": ");
786 printStat(tree.body);
787 } catch (IOException e) {
788 throw new UncheckedIOException(e);
789 }
790 }
791
792 public void visitSwitch(JCSwitch tree) {
793 try {
794 print("switch ");
795 if (tree.selector.hasTag(PARENS)) {
796 printExpr(tree.selector);
797 } else {
798 print("(");
799 printExpr(tree.selector);
800 print(")");
801 }
802 print(" {");
803 println();
804 printStats(tree.cases);
805 align();
806 print("}");
807 } catch (IOException e) {
808 throw new UncheckedIOException(e);
809 }
810 }
811
812 public void visitCase(JCCase tree) {
813 try {
814 if (tree.pat == null) {
815 print("default");
816 } else {
817 print("case ");
818 printExpr(tree.pat);
819 }
820 print(": ");
821 println();
822 indent();
823 printStats(tree.stats);
824 undent();
825 align();
826 } catch (IOException e) {
827 throw new UncheckedIOException(e);
828 }
829 }
830
831 public void visitSynchronized(JCSynchronized tree) {
832 try {
833 print("synchronized ");
834 if (tree.lock.hasTag(PARENS)) {
835 printExpr(tree.lock);
836 } else {
837 print("(");
838 printExpr(tree.lock);
839 print(")");
840 }
841 print(" ");
842 printStat(tree.body);
843 } catch (IOException e) {
844 throw new UncheckedIOException(e);
845 }
846 }
847
848 public void visitTry(JCTry tree) {
849 try {
850 print("try ");
851 if (tree.resources.nonEmpty()) {
852 print("(");
853 boolean first = true;
854 for (JCTree var : tree.resources) {
855 if (!first) {
856 println();
857 indent();
858 }
859 printStat(var);
860 first = false;
861 }
862 print(") ");
863 }
864 printStat(tree.body);
865 for (List<JCCatch> l = tree.catchers; l.nonEmpty(); l = l.tail) {
866 printStat(l.head);
867 }
868 if (tree.finalizer != null) {
869 print(" finally ");
870 printStat(tree.finalizer);
871 }
872 } catch (IOException e) {
873 throw new UncheckedIOException(e);
874 }
875 }
876
877 public void visitCatch(JCCatch tree) {
878 try {
879 print(" catch (");
880 printExpr(tree.param);
881 print(") ");
882 printStat(tree.body);
883 } catch (IOException e) {
884 throw new UncheckedIOException(e);
885 }
886 }
887
888 public void visitConditional(JCConditional tree) {
889 try {
890 open(prec, TreeInfo.condPrec);
891 printExpr(tree.cond, TreeInfo.condPrec + 1);
892 print(" ? ");
893 printExpr(tree.truepart);
894 print(" : ");
895 printExpr(tree.falsepart, TreeInfo.condPrec);
896 close(prec, TreeInfo.condPrec);
897 } catch (IOException e) {
898 throw new UncheckedIOException(e);
899 }
900 }
901
902 public void visitIf(JCIf tree) {
903 try {
904 print("if ");
905 if (tree.cond.hasTag(PARENS)) {
906 printExpr(tree.cond);
907 } else {
908 print("(");
909 printExpr(tree.cond);
910 print(")");
911 }
912 print(" ");
913 printStat(tree.thenpart);
914 if (tree.elsepart != null) {
915 print(" else ");
916 printStat(tree.elsepart);
917 }
918 } catch (IOException e) {
919 throw new UncheckedIOException(e);
920 }
921 }
922
923 public void visitExec(JCExpressionStatement tree) {
924 try {
925 printExpr(tree.expr);
926 if (prec == TreeInfo.notExpression) print(";");
927 } catch (IOException e) {
928 throw new UncheckedIOException(e);
929 }
930 }
931
932 public void visitBreak(JCBreak tree) {
933 try {
934 print("break");
935 if (tree.label != null) print(" " + tree.label);
936 print(";");
937 } catch (IOException e) {
938 throw new UncheckedIOException(e);
939 }
940 }
941
942 public void visitContinue(JCContinue tree) {
943 try {
944 print("continue");
945 if (tree.label != null) print(" " + tree.label);
946 print(";");
947 } catch (IOException e) {
948 throw new UncheckedIOException(e);
949 }
950 }
951
952 public void visitReturn(JCReturn tree) {
953 try {
954 print("return");
955 if (tree.expr != null) {
956 print(" ");
957 printExpr(tree.expr);
958 }
959 print(";");
960 } catch (IOException e) {
961 throw new UncheckedIOException(e);
962 }
963 }
964
965 public void visitThrow(JCThrow tree) {
966 try {
967 print("throw ");
968 printExpr(tree.expr);
969 print(";");
970 } catch (IOException e) {
971 throw new UncheckedIOException(e);
972 }
973 }
974
975 public void visitAssert(JCAssert tree) {
976 try {
977 print("assert ");
978 printExpr(tree.cond);
979 if (tree.detail != null) {
980 print(" : ");
981 printExpr(tree.detail);
982 }
983 print(";");
984 } catch (IOException e) {
985 throw new UncheckedIOException(e);
986 }
987 }
988
989 public void visitApply(JCMethodInvocation tree) {
990 try {
991 if (!tree.typeargs.isEmpty()) {
992 if (tree.meth.hasTag(SELECT)) {
993 JCFieldAccess left = (JCFieldAccess)tree.meth;
994 printExpr(left.selected);
995 print(".<");
996 printExprs(tree.typeargs);
997 print(">" + left.name);
998 } else {
999 print("<");
1000 printExprs(tree.typeargs);
1001 print(">");
1002 printExpr(tree.meth);
1003 }
1004 } else {
1005 printExpr(tree.meth);
1006 }
1007 print("(");
1008 printExprs(tree.args);
1009 print(")");
1010 } catch (IOException e) {
1011 throw new UncheckedIOException(e);
1012 }
1013 }
1014
1015 public void visitNewClass(JCNewClass tree) {
1016 try {
1017 if (tree.encl != null) {
1018 printExpr(tree.encl);
1019 print(".");
1020 }
1021 print("new ");
1022 if (!tree.typeargs.isEmpty()) {
1023 print("<");
1024 printExprs(tree.typeargs);
1025 print(">");
1026 }
1027 if (tree.def != null && tree.def.mods.annotations.nonEmpty()) {
1028 printTypeAnnotations(tree.def.mods.annotations);
1029 }
1030 printExpr(tree.clazz);
1031 print("(");
1032 printExprs(tree.args);
1033 print(")");
1034 if (tree.def != null) {
1035 Name enclClassNamePrev = enclClassName;
1036 enclClassName =
1037 tree.def.name != null ? tree.def.name :
1038 tree.type != null && tree.type.tsym.name != tree.type.tsym.name.table.names.empty
1039 ? tree.type.tsym.name : null;
1040 if ((tree.def.mods.flags & Flags.ENUM) != 0) print("/*enum*/");
1041 printBlock(tree.def.defs);
1042 enclClassName = enclClassNamePrev;
1043 }
1044 } catch (IOException e) {
1045 throw new UncheckedIOException(e);
1046 }
1047 }
1048
1049 public void visitNewArray(JCNewArray tree) {
1050 try {
1051 if (tree.elemtype != null) {
1052 print("new ");
1053 JCTree elem = tree.elemtype;
1054 printBaseElementType(elem);
1055
1056 if (!tree.annotations.isEmpty()) {
1057 print(' ');
1058 printTypeAnnotations(tree.annotations);
1059 }
1060 if (tree.elems != null) {
1061 print("[]");
1062 }
1063
1064 int i = 0;
1065 List<List<JCAnnotation>> da = tree.dimAnnotations;
1066 for (List<JCExpression> l = tree.dims; l.nonEmpty(); l = l.tail) {
1067 if (da.size() > i && !da.get(i).isEmpty()) {
1068 print(' ');
1069 printTypeAnnotations(da.get(i));
1070 }
1071 print("[");
1072 i++;
1073 printExpr(l.head);
1074 print("]");
1075 }
1076 printBrackets(elem);
1077 }
1078 if (tree.elems != null) {
1079 print("{");
1080 printExprs(tree.elems);
1081 print("}");
1082 }
1083 } catch (IOException e) {
1084 throw new UncheckedIOException(e);
1085 }
1086 }
1087
1088 public void visitLambda(JCLambda tree) {
1089 try {
1090 print("(");
1091 if (tree.paramKind == JCLambda.ParameterKind.EXPLICIT) {
1092 printExprs(tree.params);
1093 } else {
1094 String sep = "";
1095 for (JCVariableDecl param : tree.params) {
1096 print(sep);
1097 print(param.name);
1098 sep = ",";
1099 }
1100 }
1101 print(")->");
1102 printExpr(tree.body);
1103 } catch (IOException e) {
1104 throw new UncheckedIOException(e);
1105 }
1106 }
1107
1108 public void visitParens(JCParens tree) {
1109 try {
1110 print("(");
1111 printExpr(tree.expr);
1112 print(")");
1113 } catch (IOException e) {
1114 throw new UncheckedIOException(e);
1115 }
1116 }
1117
1118 public void visitAssign(JCAssign tree) {
1119 try {
1120 open(prec, TreeInfo.assignPrec);
1121 printExpr(tree.lhs, TreeInfo.assignPrec + 1);
1122 print(" = ");
1123 printExpr(tree.rhs, TreeInfo.assignPrec);
1124 close(prec, TreeInfo.assignPrec);
1125 } catch (IOException e) {
1126 throw new UncheckedIOException(e);
1127 }
1128 }
1129
1130 public String operatorName(JCTree.Tag tag) {
1131 switch(tag) {
1132 case POS: return "+";
1133 case NEG: return "-";
1134 case NOT: return "!";
1135 case COMPL: return "~";
1136 case PREINC: return "++";
1137 case PREDEC: return "--";
1138 case POSTINC: return "++";
1139 case POSTDEC: return "--";
1140 case NULLCHK: return "<*nullchk*>";
1141 case OR: return "||";
1142 case AND: return "&&";
1143 case EQ: return "==";
1144 case NE: return "!=";
1145 case LT: return "<";
1146 case GT: return ">";
1147 case LE: return "<=";
1148 case GE: return ">=";
1149 case BITOR: return "|";
1150 case BITXOR: return "^";
1151 case BITAND: return "&";
1152 case SL: return "<<";
1153 case SR: return ">>";
1154 case USR: return ">>>";
1155 case PLUS: return "+";
1156 case MINUS: return "-";
1157 case MUL: return "*";
1158 case DIV: return "/";
1159 case MOD: return "%";
1160 default: throw new Error();
1161 }
1162 }
1163
1164 public void visitAssignop(JCAssignOp tree) {
1165 try {
1166 open(prec, TreeInfo.assignopPrec);
1167 printExpr(tree.lhs, TreeInfo.assignopPrec + 1);
1168 print(" " + operatorName(tree.getTag().noAssignOp()) + "= ");
1169 printExpr(tree.rhs, TreeInfo.assignopPrec);
1170 close(prec, TreeInfo.assignopPrec);
1171 } catch (IOException e) {
1172 throw new UncheckedIOException(e);
1173 }
1174 }
1175
1176 public void visitUnary(JCUnary tree) {
1177 try {
1178 int ownprec = TreeInfo.opPrec(tree.getTag());
1179 String opname = operatorName(tree.getTag());
1180 open(prec, ownprec);
1181 if (!tree.getTag().isPostUnaryOp()) {
1182 print(opname);
1183 printExpr(tree.arg, ownprec);
1184 } else {
1185 printExpr(tree.arg, ownprec);
1186 print(opname);
1187 }
1188 close(prec, ownprec);
1189 } catch (IOException e) {
1190 throw new UncheckedIOException(e);
1191 }
1192 }
1193
1194 public void visitBinary(JCBinary tree) {
1195 try {
1196 int ownprec = TreeInfo.opPrec(tree.getTag());
1197 String opname = operatorName(tree.getTag());
1198 open(prec, ownprec);
1199 printExpr(tree.lhs, ownprec);
1200 print(" " + opname + " ");
1201 printExpr(tree.rhs, ownprec + 1);
1202 close(prec, ownprec);
1203 } catch (IOException e) {
1204 throw new UncheckedIOException(e);
1205 }
1206 }
1207
1208 public void visitTypeCast(JCTypeCast tree) {
1209 try {
1210 open(prec, TreeInfo.prefixPrec);
1211 print("(");
1212 printExpr(tree.clazz);
1213 print(")");
1214 printExpr(tree.expr, TreeInfo.prefixPrec);
1215 close(prec, TreeInfo.prefixPrec);
1216 } catch (IOException e) {
1217 throw new UncheckedIOException(e);
1218 }
1219 }
1220
1221 public void visitTypeTest(JCInstanceOf tree) {
1222 try {
1223 open(prec, TreeInfo.ordPrec);
1224 printExpr(tree.expr, TreeInfo.ordPrec);
1225 print(" instanceof ");
1226 printExpr(tree.clazz, TreeInfo.ordPrec + 1);
1227 close(prec, TreeInfo.ordPrec);
1228 } catch (IOException e) {
1229 throw new UncheckedIOException(e);
1230 }
1231 }
1232
1233 public void visitIndexed(JCArrayAccess tree) {
1234 try {
1235 printExpr(tree.indexed, TreeInfo.postfixPrec);
1236 print("[");
1237 printExpr(tree.index);
1238 print("]");
1239 } catch (IOException e) {
1240 throw new UncheckedIOException(e);
1241 }
1242 }
1243
1244 public void visitSelect(JCFieldAccess tree) {
1245 try {
1246 printExpr(tree.selected, TreeInfo.postfixPrec);
1247 print("." + tree.name);
1248 } catch (IOException e) {
1249 throw new UncheckedIOException(e);
1250 }
1251 }
1252
1253 public void visitReference(JCMemberReference tree) {
1254 try {
1255 printExpr(tree.expr);
1256 print("::");
1257 if (tree.typeargs != null) {
1258 print("<");
1259 printExprs(tree.typeargs);
1260 print(">");
1261 }
1262 print(tree.getMode() == ReferenceMode.INVOKE ? tree.name : "new");
1263 } catch (IOException e) {
1264 throw new UncheckedIOException(e);
1265 }
1266 }
1267
1268 public void visitIdent(JCIdent tree) {
1269 try {
1270 print(tree.name);
1271 } catch (IOException e) {
1272 throw new UncheckedIOException(e);
1273 }
1274 }
1275
1276 public void visitLiteral(JCLiteral tree) {
1277 try {
1278 switch (tree.typetag) {
1279 case INT:
1280 print(tree.value.toString());
1281 break;
1282 case LONG:
1283 print(tree.value + "L");
1284 break;
1285 case FLOAT:
1286 print(tree.value + "F");
1287 break;
1288 case DOUBLE:
1289 print(tree.value.toString());
1290 break;
1291 case CHAR:
1292 print("\'" +
1293 Convert.quote(
1294 String.valueOf((char)((Number)tree.value).intValue())) +
1295 "\'");
1296 break;
1297 case BOOLEAN:
1298 print(((Number)tree.value).intValue() == 1 ? "true" : "false");
1299 break;
1300 case BOT:
1301 print("null");
1302 break;
1303 default:
1304 print("\"" + Convert.quote(tree.value.toString()) + "\"");
1305 break;
1306 }
1307 } catch (IOException e) {
1308 throw new UncheckedIOException(e);
1309 }
1310 }
1311
1312 public void visitTypeIdent(JCPrimitiveTypeTree tree) {
1313 try {
1314 switch(tree.typetag) {
1315 case BYTE:
1316 print("byte");
1317 break;
1318 case CHAR:
1319 print("char");
1320 break;
1321 case SHORT:
1322 print("short");
1323 break;
1324 case INT:
1325 print("int");
1326 break;
1327 case LONG:
1328 print("long");
1329 break;
1330 case FLOAT:
1331 print("float");
1332 break;
1333 case DOUBLE:
1334 print("double");
1335 break;
1336 case BOOLEAN:
1337 print("boolean");
1338 break;
1339 case VOID:
1340 print("void");
1341 break;
1342 default:
1343 print("error");
1344 break;
1345 }
1346 } catch (IOException e) {
1347 throw new UncheckedIOException(e);
1348 }
1349 }
1350
1351 public void visitTypeArray(JCArrayTypeTree tree) {
1352 try {
1353 printBaseElementType(tree);
1354 printBrackets(tree);
1355 } catch (IOException e) {
1356 throw new UncheckedIOException(e);
1357 }
1358 }
1359
1360 // Prints the inner element type of a nested array
1361 private void printBaseElementType(JCTree tree) throws IOException {
1362 printExpr(TreeInfo.innermostType(tree, false));
1363 }
1364
1365 // prints the brackets of a nested array in reverse order
1366 // tree is either JCArrayTypeTree or JCAnnotatedTypeTree
1367 private void printBrackets(JCTree tree) throws IOException {
1368 JCTree elem = tree;
1369 while (true) {
1370 if (elem.hasTag(ANNOTATED_TYPE)) {
1371 JCAnnotatedType atype = (JCAnnotatedType) elem;
1372 elem = atype.underlyingType;
1373 if (elem.hasTag(TYPEARRAY)) {
1374 print(' ');
1375 printTypeAnnotations(atype.annotations);
1376 }
1377 }
1378 if (elem.hasTag(TYPEARRAY)) {
1379 print("[]");
1380 elem = ((JCArrayTypeTree)elem).elemtype;
1381 } else {
1382 break;
1383 }
1384 }
1385 }
1386
1387 public void visitTypeApply(JCTypeApply tree) {
1388 try {
1389 printExpr(tree.clazz);
1390 print("<");
1391 printExprs(tree.arguments);
1392 print(">");
1393 } catch (IOException e) {
1394 throw new UncheckedIOException(e);
1395 }
1396 }
1397
1398 public void visitTypeUnion(JCTypeUnion tree) {
1399 try {
1400 printExprs(tree.alternatives, " | ");
1401 } catch (IOException e) {
1402 throw new UncheckedIOException(e);
1403 }
1404 }
1405
1406 public void visitTypeIntersection(JCTypeIntersection tree) {
1407 try {
1408 printExprs(tree.bounds, " & ");
1409 } catch (IOException e) {
1410 throw new UncheckedIOException(e);
1411 }
1412 }
1413
1414 public void visitTypeParameter(JCTypeParameter tree) {
1415 try {
1416 if (tree.annotations.nonEmpty()) {
1417 this.printTypeAnnotations(tree.annotations);
1418 }
1419 print(tree.name);
1420 if (tree.bounds.nonEmpty()) {
1421 print(" extends ");
1422 printExprs(tree.bounds, " & ");
1423 }
1424 } catch (IOException e) {
1425 throw new UncheckedIOException(e);
1426 }
1427 }
1428
1429 @Override
1430 public void visitWildcard(JCWildcard tree) {
1431 try {
1432 print(tree.kind);
1433 if (tree.kind.kind != BoundKind.UNBOUND)
1434 printExpr(tree.inner);
1435 } catch (IOException e) {
1436 throw new UncheckedIOException(e);
1437 }
1438 }
1439
1440 @Override
1441 public void visitTypeBoundKind(TypeBoundKind tree) {
1442 try {
1443 print(String.valueOf(tree.kind));
1444 } catch (IOException e) {
1445 throw new UncheckedIOException(e);
1446 }
1447 }
1448
1449 public void visitErroneous(JCErroneous tree) {
1450 try {
1451 print("(ERROR)");
1452 } catch (IOException e) {
1453 throw new UncheckedIOException(e);
1454 }
1455 }
1456
1457 public void visitLetExpr(LetExpr tree) {
1458 try {
1459 print("(let " + tree.defs + " in " + tree.expr + ")");
1460 } catch (IOException e) {
1461 throw new UncheckedIOException(e);
1462 }
1463 }
1464
1465 public void visitModifiers(JCModifiers mods) {
1466 try {
1467 printAnnotations(mods.annotations);
1468 printFlags(mods.flags);
1469 } catch (IOException e) {
1470 throw new UncheckedIOException(e);
1471 }
1472 }
1473
1474 public void visitAnnotation(JCAnnotation tree) {
1475 try {
1476 print("@");
1477 printExpr(tree.annotationType);
1478 print("(");
1479 printExprs(tree.args);
1480 print(")");
1481 } catch (IOException e) {
1482 throw new UncheckedIOException(e);
1483 }
1484 }
1485
1486 public void visitAnnotatedType(JCAnnotatedType tree) {
1487 try {
1488 if (tree.underlyingType.hasTag(SELECT)) {
1489 JCFieldAccess access = (JCFieldAccess) tree.underlyingType;
1490 printExpr(access.selected, TreeInfo.postfixPrec);
1491 print(".");
1492 printTypeAnnotations(tree.annotations);
1493 print(access.name);
1494 } else if (tree.underlyingType.hasTag(TYPEARRAY)) {
1495 printBaseElementType(tree);
1496 printBrackets(tree);
1497 } else {
1498 printTypeAnnotations(tree.annotations);
1499 printExpr(tree.underlyingType);
1500 }
1501 } catch (IOException e) {
1502 throw new UncheckedIOException(e);
1503 }
1504 }
1505
1506 public void visitTree(JCTree tree) {
1507 try {
1508 print("(UNKNOWN: " + tree.getTag() + ")");
1509 println();
1510 } catch (IOException e) {
1511 throw new UncheckedIOException(e);
1512 }
1513 }
1514
1515 }