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src/share/classes/com/sun/tools/javac/tree/TreeTranslator.java@71f35e4b93a5
src/share/classes/com/sun/tools/javac/tree/TreeTranslator.java
Wed, 23 Jan 2013 13:27:24 -0800
- author
- jjg
- date
- Wed, 23 Jan 2013 13:27:24 -0800
- changeset 1521
- 71f35e4b93a5
- parent 1436
- f6f1fd261f57
- child 1755
- ddb4a2bfcd82
- permissions
- -rw-r--r--
8006775: JSR 308: Compiler changes in JDK8
Reviewed-by: jjg
Contributed-by: mernst@cs.washington.edu, wmdietl@cs.washington.edu, mpapi@csail.mit.edu, mahmood@notnoop.com
1 /*
2 * Copyright (c) 1999, 2013, 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 */
26 package com.sun.tools.javac.tree;
28 import com.sun.tools.javac.util.*;
29 import com.sun.tools.javac.tree.JCTree.*;
31 /** A subclass of Tree.Visitor, this class defines
32 * a general tree translator pattern. Translation proceeds recursively in
33 * left-to-right order down a tree, constructing translated nodes by
34 * overwriting existing ones. There is one visitor method in this class
35 * for every possible kind of tree node. To obtain a specific
36 * translator, it suffices to override those visitor methods which
37 * do some interesting work. The translator class itself takes care of all
38 * navigational aspects.
39 *
40 * <p><b>This is NOT part of any supported API.
41 * If you write code that depends on this, you do so at your own risk.
42 * This code and its internal interfaces are subject to change or
43 * deletion without notice.</b>
44 */
45 public class TreeTranslator extends JCTree.Visitor {
47 /** Visitor result field: a tree
48 */
49 protected JCTree result;
51 /** Visitor method: Translate a single node.
52 */
53 @SuppressWarnings("unchecked")
54 public <T extends JCTree> T translate(T tree) {
55 if (tree == null) {
56 return null;
57 } else {
58 tree.accept(this);
59 JCTree result = this.result;
60 this.result = null;
61 return (T)result; // XXX cast
62 }
63 }
65 /** Visitor method: translate a list of nodes.
66 */
67 public <T extends JCTree> List<T> translate(List<T> trees) {
68 if (trees == null) return null;
69 for (List<T> l = trees; l.nonEmpty(); l = l.tail)
70 l.head = translate(l.head);
71 return trees;
72 }
74 /** Visitor method: translate a list of variable definitions.
75 */
76 public List<JCVariableDecl> translateVarDefs(List<JCVariableDecl> trees) {
77 for (List<JCVariableDecl> l = trees; l.nonEmpty(); l = l.tail)
78 l.head = translate(l.head);
79 return trees;
80 }
82 /** Visitor method: translate a list of type parameters.
83 */
84 public List<JCTypeParameter> translateTypeParams(List<JCTypeParameter> trees) {
85 for (List<JCTypeParameter> l = trees; l.nonEmpty(); l = l.tail)
86 l.head = translate(l.head);
87 return trees;
88 }
90 /** Visitor method: translate a list of case parts of switch statements.
91 */
92 public List<JCCase> translateCases(List<JCCase> trees) {
93 for (List<JCCase> l = trees; l.nonEmpty(); l = l.tail)
94 l.head = translate(l.head);
95 return trees;
96 }
98 /** Visitor method: translate a list of catch clauses in try statements.
99 */
100 public List<JCCatch> translateCatchers(List<JCCatch> trees) {
101 for (List<JCCatch> l = trees; l.nonEmpty(); l = l.tail)
102 l.head = translate(l.head);
103 return trees;
104 }
106 /** Visitor method: translate a list of catch clauses in try statements.
107 */
108 public List<JCAnnotation> translateAnnotations(List<JCAnnotation> trees) {
109 for (List<JCAnnotation> l = trees; l.nonEmpty(); l = l.tail)
110 l.head = translate(l.head);
111 return trees;
112 }
114 /* ***************************************************************************
115 * Visitor methods
116 ****************************************************************************/
118 public void visitTopLevel(JCCompilationUnit tree) {
119 tree.pid = translate(tree.pid);
120 tree.defs = translate(tree.defs);
121 result = tree;
122 }
124 public void visitImport(JCImport tree) {
125 tree.qualid = translate(tree.qualid);
126 result = tree;
127 }
129 public void visitClassDef(JCClassDecl tree) {
130 tree.mods = translate(tree.mods);
131 tree.typarams = translateTypeParams(tree.typarams);
132 tree.extending = translate(tree.extending);
133 tree.implementing = translate(tree.implementing);
134 tree.defs = translate(tree.defs);
135 result = tree;
136 }
138 public void visitMethodDef(JCMethodDecl tree) {
139 tree.mods = translate(tree.mods);
140 tree.restype = translate(tree.restype);
141 tree.typarams = translateTypeParams(tree.typarams);
142 tree.recvparam = translate(tree.recvparam);
143 tree.params = translateVarDefs(tree.params);
144 tree.thrown = translate(tree.thrown);
145 tree.body = translate(tree.body);
146 result = tree;
147 }
149 public void visitVarDef(JCVariableDecl tree) {
150 tree.mods = translate(tree.mods);
151 tree.vartype = translate(tree.vartype);
152 tree.init = translate(tree.init);
153 result = tree;
154 }
156 public void visitSkip(JCSkip tree) {
157 result = tree;
158 }
160 public void visitBlock(JCBlock tree) {
161 tree.stats = translate(tree.stats);
162 result = tree;
163 }
165 public void visitDoLoop(JCDoWhileLoop tree) {
166 tree.body = translate(tree.body);
167 tree.cond = translate(tree.cond);
168 result = tree;
169 }
171 public void visitWhileLoop(JCWhileLoop tree) {
172 tree.cond = translate(tree.cond);
173 tree.body = translate(tree.body);
174 result = tree;
175 }
177 public void visitForLoop(JCForLoop tree) {
178 tree.init = translate(tree.init);
179 tree.cond = translate(tree.cond);
180 tree.step = translate(tree.step);
181 tree.body = translate(tree.body);
182 result = tree;
183 }
185 public void visitForeachLoop(JCEnhancedForLoop tree) {
186 tree.var = translate(tree.var);
187 tree.expr = translate(tree.expr);
188 tree.body = translate(tree.body);
189 result = tree;
190 }
192 public void visitLabelled(JCLabeledStatement tree) {
193 tree.body = translate(tree.body);
194 result = tree;
195 }
197 public void visitSwitch(JCSwitch tree) {
198 tree.selector = translate(tree.selector);
199 tree.cases = translateCases(tree.cases);
200 result = tree;
201 }
203 public void visitCase(JCCase tree) {
204 tree.pat = translate(tree.pat);
205 tree.stats = translate(tree.stats);
206 result = tree;
207 }
209 public void visitSynchronized(JCSynchronized tree) {
210 tree.lock = translate(tree.lock);
211 tree.body = translate(tree.body);
212 result = tree;
213 }
215 public void visitTry(JCTry tree) {
216 tree.resources = translate(tree.resources);
217 tree.body = translate(tree.body);
218 tree.catchers = translateCatchers(tree.catchers);
219 tree.finalizer = translate(tree.finalizer);
220 result = tree;
221 }
223 public void visitCatch(JCCatch tree) {
224 tree.param = translate(tree.param);
225 tree.body = translate(tree.body);
226 result = tree;
227 }
229 public void visitConditional(JCConditional tree) {
230 tree.cond = translate(tree.cond);
231 tree.truepart = translate(tree.truepart);
232 tree.falsepart = translate(tree.falsepart);
233 result = tree;
234 }
236 public void visitIf(JCIf tree) {
237 tree.cond = translate(tree.cond);
238 tree.thenpart = translate(tree.thenpart);
239 tree.elsepart = translate(tree.elsepart);
240 result = tree;
241 }
243 public void visitExec(JCExpressionStatement tree) {
244 tree.expr = translate(tree.expr);
245 result = tree;
246 }
248 public void visitBreak(JCBreak tree) {
249 result = tree;
250 }
252 public void visitContinue(JCContinue tree) {
253 result = tree;
254 }
256 public void visitReturn(JCReturn tree) {
257 tree.expr = translate(tree.expr);
258 result = tree;
259 }
261 public void visitThrow(JCThrow tree) {
262 tree.expr = translate(tree.expr);
263 result = tree;
264 }
266 public void visitAssert(JCAssert tree) {
267 tree.cond = translate(tree.cond);
268 tree.detail = translate(tree.detail);
269 result = tree;
270 }
272 public void visitApply(JCMethodInvocation tree) {
273 tree.meth = translate(tree.meth);
274 tree.args = translate(tree.args);
275 result = tree;
276 }
278 public void visitNewClass(JCNewClass tree) {
279 tree.encl = translate(tree.encl);
280 tree.clazz = translate(tree.clazz);
281 tree.args = translate(tree.args);
282 tree.def = translate(tree.def);
283 result = tree;
284 }
286 public void visitLambda(JCLambda tree) {
287 tree.params = translate(tree.params);
288 tree.body = translate(tree.body);
289 result = tree;
290 }
292 public void visitNewArray(JCNewArray tree) {
293 tree.annotations = translate(tree.annotations);
294 List<List<JCAnnotation>> dimAnnos = List.nil();
295 for (List<JCAnnotation> origDimAnnos : tree.dimAnnotations)
296 dimAnnos = dimAnnos.append(translate(origDimAnnos));
297 tree.dimAnnotations = dimAnnos;
298 tree.elemtype = translate(tree.elemtype);
299 tree.dims = translate(tree.dims);
300 tree.elems = translate(tree.elems);
301 result = tree;
302 }
304 public void visitParens(JCParens tree) {
305 tree.expr = translate(tree.expr);
306 result = tree;
307 }
309 public void visitAssign(JCAssign tree) {
310 tree.lhs = translate(tree.lhs);
311 tree.rhs = translate(tree.rhs);
312 result = tree;
313 }
315 public void visitAssignop(JCAssignOp tree) {
316 tree.lhs = translate(tree.lhs);
317 tree.rhs = translate(tree.rhs);
318 result = tree;
319 }
321 public void visitUnary(JCUnary tree) {
322 tree.arg = translate(tree.arg);
323 result = tree;
324 }
326 public void visitBinary(JCBinary tree) {
327 tree.lhs = translate(tree.lhs);
328 tree.rhs = translate(tree.rhs);
329 result = tree;
330 }
332 public void visitTypeCast(JCTypeCast tree) {
333 tree.clazz = translate(tree.clazz);
334 tree.expr = translate(tree.expr);
335 result = tree;
336 }
338 public void visitTypeTest(JCInstanceOf tree) {
339 tree.expr = translate(tree.expr);
340 tree.clazz = translate(tree.clazz);
341 result = tree;
342 }
344 public void visitIndexed(JCArrayAccess tree) {
345 tree.indexed = translate(tree.indexed);
346 tree.index = translate(tree.index);
347 result = tree;
348 }
350 public void visitSelect(JCFieldAccess tree) {
351 tree.selected = translate(tree.selected);
352 result = tree;
353 }
355 public void visitReference(JCMemberReference tree) {
356 tree.expr = translate(tree.expr);
357 result = tree;
358 }
360 public void visitIdent(JCIdent tree) {
361 result = tree;
362 }
364 public void visitLiteral(JCLiteral tree) {
365 result = tree;
366 }
368 public void visitTypeIdent(JCPrimitiveTypeTree tree) {
369 result = tree;
370 }
372 public void visitTypeArray(JCArrayTypeTree tree) {
373 tree.elemtype = translate(tree.elemtype);
374 result = tree;
375 }
377 public void visitTypeApply(JCTypeApply tree) {
378 tree.clazz = translate(tree.clazz);
379 tree.arguments = translate(tree.arguments);
380 result = tree;
381 }
383 public void visitTypeUnion(JCTypeUnion tree) {
384 tree.alternatives = translate(tree.alternatives);
385 result = tree;
386 }
388 public void visitTypeIntersection(JCTypeIntersection tree) {
389 tree.bounds = translate(tree.bounds);
390 result = tree;
391 }
393 public void visitTypeParameter(JCTypeParameter tree) {
394 tree.annotations = translate(tree.annotations);
395 tree.bounds = translate(tree.bounds);
396 result = tree;
397 }
399 @Override
400 public void visitWildcard(JCWildcard tree) {
401 tree.kind = translate(tree.kind);
402 tree.inner = translate(tree.inner);
403 result = tree;
404 }
406 @Override
407 public void visitTypeBoundKind(TypeBoundKind tree) {
408 result = tree;
409 }
411 public void visitErroneous(JCErroneous tree) {
412 result = tree;
413 }
415 public void visitLetExpr(LetExpr tree) {
416 tree.defs = translateVarDefs(tree.defs);
417 tree.expr = translate(tree.expr);
418 result = tree;
419 }
421 public void visitModifiers(JCModifiers tree) {
422 tree.annotations = translateAnnotations(tree.annotations);
423 result = tree;
424 }
426 public void visitAnnotation(JCAnnotation tree) {
427 tree.annotationType = translate(tree.annotationType);
428 tree.args = translate(tree.args);
429 result = tree;
430 }
432 public void visitAnnotatedType(JCAnnotatedType tree) {
433 tree.annotations = translate(tree.annotations);
434 tree.underlyingType = translate(tree.underlyingType);
435 result = tree;
436 }
438 public void visitTree(JCTree tree) {
439 throw new AssertionError(tree);
440 }
441 }
