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src/share/classes/com/sun/tools/javac/tree/TreeTranslator.java@959103a6100f
src/share/classes/com/sun/tools/javac/tree/TreeTranslator.java
Wed, 27 Apr 2016 01:34:52 +0800
- author
- aoqi
- date
- Wed, 27 Apr 2016 01:34:52 +0800
- changeset 0
- 959103a6100f
- child 2525
- 2eb010b6cb22
- permissions
- -rw-r--r--
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/langtools/
changeset: 2573:53ca196be1ae
tag: jdk8u25-b17
1 /*
2 * Copyright (c) 1999, 2014, 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 tmpResult = this.result;
60 this.result = null;
61 return (T)tmpResult; // 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.nameexpr = translate(tree.nameexpr);
152 tree.vartype = translate(tree.vartype);
153 tree.init = translate(tree.init);
154 result = tree;
155 }
157 public void visitSkip(JCSkip tree) {
158 result = tree;
159 }
161 public void visitBlock(JCBlock tree) {
162 tree.stats = translate(tree.stats);
163 result = tree;
164 }
166 public void visitDoLoop(JCDoWhileLoop tree) {
167 tree.body = translate(tree.body);
168 tree.cond = translate(tree.cond);
169 result = tree;
170 }
172 public void visitWhileLoop(JCWhileLoop tree) {
173 tree.cond = translate(tree.cond);
174 tree.body = translate(tree.body);
175 result = tree;
176 }
178 public void visitForLoop(JCForLoop tree) {
179 tree.init = translate(tree.init);
180 tree.cond = translate(tree.cond);
181 tree.step = translate(tree.step);
182 tree.body = translate(tree.body);
183 result = tree;
184 }
186 public void visitForeachLoop(JCEnhancedForLoop tree) {
187 tree.var = translate(tree.var);
188 tree.expr = translate(tree.expr);
189 tree.body = translate(tree.body);
190 result = tree;
191 }
193 public void visitLabelled(JCLabeledStatement tree) {
194 tree.body = translate(tree.body);
195 result = tree;
196 }
198 public void visitSwitch(JCSwitch tree) {
199 tree.selector = translate(tree.selector);
200 tree.cases = translateCases(tree.cases);
201 result = tree;
202 }
204 public void visitCase(JCCase tree) {
205 tree.pat = translate(tree.pat);
206 tree.stats = translate(tree.stats);
207 result = tree;
208 }
210 public void visitSynchronized(JCSynchronized tree) {
211 tree.lock = translate(tree.lock);
212 tree.body = translate(tree.body);
213 result = tree;
214 }
216 public void visitTry(JCTry tree) {
217 tree.resources = translate(tree.resources);
218 tree.body = translate(tree.body);
219 tree.catchers = translateCatchers(tree.catchers);
220 tree.finalizer = translate(tree.finalizer);
221 result = tree;
222 }
224 public void visitCatch(JCCatch tree) {
225 tree.param = translate(tree.param);
226 tree.body = translate(tree.body);
227 result = tree;
228 }
230 public void visitConditional(JCConditional tree) {
231 tree.cond = translate(tree.cond);
232 tree.truepart = translate(tree.truepart);
233 tree.falsepart = translate(tree.falsepart);
234 result = tree;
235 }
237 public void visitIf(JCIf tree) {
238 tree.cond = translate(tree.cond);
239 tree.thenpart = translate(tree.thenpart);
240 tree.elsepart = translate(tree.elsepart);
241 result = tree;
242 }
244 public void visitExec(JCExpressionStatement tree) {
245 tree.expr = translate(tree.expr);
246 result = tree;
247 }
249 public void visitBreak(JCBreak tree) {
250 result = tree;
251 }
253 public void visitContinue(JCContinue tree) {
254 result = tree;
255 }
257 public void visitReturn(JCReturn tree) {
258 tree.expr = translate(tree.expr);
259 result = tree;
260 }
262 public void visitThrow(JCThrow tree) {
263 tree.expr = translate(tree.expr);
264 result = tree;
265 }
267 public void visitAssert(JCAssert tree) {
268 tree.cond = translate(tree.cond);
269 tree.detail = translate(tree.detail);
270 result = tree;
271 }
273 public void visitApply(JCMethodInvocation tree) {
274 tree.meth = translate(tree.meth);
275 tree.args = translate(tree.args);
276 result = tree;
277 }
279 public void visitNewClass(JCNewClass tree) {
280 tree.encl = translate(tree.encl);
281 tree.clazz = translate(tree.clazz);
282 tree.args = translate(tree.args);
283 tree.def = translate(tree.def);
284 result = tree;
285 }
287 public void visitLambda(JCLambda tree) {
288 tree.params = translate(tree.params);
289 tree.body = translate(tree.body);
290 result = tree;
291 }
293 public void visitNewArray(JCNewArray tree) {
294 tree.annotations = translate(tree.annotations);
295 List<List<JCAnnotation>> dimAnnos = List.nil();
296 for (List<JCAnnotation> origDimAnnos : tree.dimAnnotations)
297 dimAnnos = dimAnnos.append(translate(origDimAnnos));
298 tree.dimAnnotations = dimAnnos;
299 tree.elemtype = translate(tree.elemtype);
300 tree.dims = translate(tree.dims);
301 tree.elems = translate(tree.elems);
302 result = tree;
303 }
305 public void visitParens(JCParens tree) {
306 tree.expr = translate(tree.expr);
307 result = tree;
308 }
310 public void visitAssign(JCAssign tree) {
311 tree.lhs = translate(tree.lhs);
312 tree.rhs = translate(tree.rhs);
313 result = tree;
314 }
316 public void visitAssignop(JCAssignOp tree) {
317 tree.lhs = translate(tree.lhs);
318 tree.rhs = translate(tree.rhs);
319 result = tree;
320 }
322 public void visitUnary(JCUnary tree) {
323 tree.arg = translate(tree.arg);
324 result = tree;
325 }
327 public void visitBinary(JCBinary tree) {
328 tree.lhs = translate(tree.lhs);
329 tree.rhs = translate(tree.rhs);
330 result = tree;
331 }
333 public void visitTypeCast(JCTypeCast tree) {
334 tree.clazz = translate(tree.clazz);
335 tree.expr = translate(tree.expr);
336 result = tree;
337 }
339 public void visitTypeTest(JCInstanceOf tree) {
340 tree.expr = translate(tree.expr);
341 tree.clazz = translate(tree.clazz);
342 result = tree;
343 }
345 public void visitIndexed(JCArrayAccess tree) {
346 tree.indexed = translate(tree.indexed);
347 tree.index = translate(tree.index);
348 result = tree;
349 }
351 public void visitSelect(JCFieldAccess tree) {
352 tree.selected = translate(tree.selected);
353 result = tree;
354 }
356 public void visitReference(JCMemberReference tree) {
357 tree.expr = translate(tree.expr);
358 result = tree;
359 }
361 public void visitIdent(JCIdent tree) {
362 result = tree;
363 }
365 public void visitLiteral(JCLiteral tree) {
366 result = tree;
367 }
369 public void visitTypeIdent(JCPrimitiveTypeTree tree) {
370 result = tree;
371 }
373 public void visitTypeArray(JCArrayTypeTree tree) {
374 tree.elemtype = translate(tree.elemtype);
375 result = tree;
376 }
378 public void visitTypeApply(JCTypeApply tree) {
379 tree.clazz = translate(tree.clazz);
380 tree.arguments = translate(tree.arguments);
381 result = tree;
382 }
384 public void visitTypeUnion(JCTypeUnion tree) {
385 tree.alternatives = translate(tree.alternatives);
386 result = tree;
387 }
389 public void visitTypeIntersection(JCTypeIntersection tree) {
390 tree.bounds = translate(tree.bounds);
391 result = tree;
392 }
394 public void visitTypeParameter(JCTypeParameter tree) {
395 tree.annotations = translate(tree.annotations);
396 tree.bounds = translate(tree.bounds);
397 result = tree;
398 }
400 @Override
401 public void visitWildcard(JCWildcard tree) {
402 tree.kind = translate(tree.kind);
403 tree.inner = translate(tree.inner);
404 result = tree;
405 }
407 @Override
408 public void visitTypeBoundKind(TypeBoundKind tree) {
409 result = tree;
410 }
412 public void visitErroneous(JCErroneous tree) {
413 result = tree;
414 }
416 public void visitLetExpr(LetExpr tree) {
417 tree.defs = translateVarDefs(tree.defs);
418 tree.expr = translate(tree.expr);
419 result = tree;
420 }
422 public void visitModifiers(JCModifiers tree) {
423 tree.annotations = translateAnnotations(tree.annotations);
424 result = tree;
425 }
427 public void visitAnnotation(JCAnnotation tree) {
428 tree.annotationType = translate(tree.annotationType);
429 tree.args = translate(tree.args);
430 result = tree;
431 }
433 public void visitAnnotatedType(JCAnnotatedType tree) {
434 tree.annotations = translate(tree.annotations);
435 tree.underlyingType = translate(tree.underlyingType);
436 result = tree;
437 }
439 public void visitTree(JCTree tree) {
440 throw new AssertionError(tree);
441 }
442 }
