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comparison: src/share/classes/com/sun/tools/javac/tree/TreeCopier.java

src/share/classes/com/sun/tools/javac/tree/TreeCopier.java

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1 /*
2 * Copyright (c) 2006, 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 */
25
26 package com.sun.tools.javac.tree;
27
28 import com.sun.source.tree.*;
29 import com.sun.tools.javac.tree.JCTree.*;
30 import com.sun.tools.javac.util.List;
31 import com.sun.tools.javac.util.ListBuffer;
32
33 /**
34 * Creates a copy of a tree, using a given TreeMaker.
35 * Names, literal values, etc are shared with the original.
36 *
37 * <p><b>This is NOT part of any supported API.
38 * If you write code that depends on this, you do so at your own risk.
39 * This code and its internal interfaces are subject to change or
40 * deletion without notice.</b>
41 */
42 public class TreeCopier<P> implements TreeVisitor<JCTree,P> {
43 private TreeMaker M;
44
45 /** Creates a new instance of TreeCopier */
46 public TreeCopier(TreeMaker M) {
47 this.M = M;
48 }
49
50 public <T extends JCTree> T copy(T tree) {
51 return copy(tree, null);
52 }
53
54 @SuppressWarnings("unchecked")
55 public <T extends JCTree> T copy(T tree, P p) {
56 if (tree == null)
57 return null;
58 return (T) (tree.accept(this, p));
59 }
60
61 public <T extends JCTree> List<T> copy(List<T> trees) {
62 return copy(trees, null);
63 }
64
65 public <T extends JCTree> List<T> copy(List<T> trees, P p) {
66 if (trees == null)
67 return null;
68 ListBuffer<T> lb = new ListBuffer<T>();
69 for (T tree: trees)
70 lb.append(copy(tree, p));
71 return lb.toList();
72 }
73
74 public JCTree visitAnnotatedType(AnnotatedTypeTree node, P p) {
75 JCAnnotatedType t = (JCAnnotatedType) node;
76 List<JCAnnotation> annotations = copy(t.annotations, p);
77 JCExpression underlyingType = copy(t.underlyingType, p);
78 return M.at(t.pos).AnnotatedType(annotations, underlyingType);
79 }
80
81 public JCTree visitAnnotation(AnnotationTree node, P p) {
82 JCAnnotation t = (JCAnnotation) node;
83 JCTree annotationType = copy(t.annotationType, p);
84 List<JCExpression> args = copy(t.args, p);
85 if (t.getKind() == Tree.Kind.TYPE_ANNOTATION) {
86 JCAnnotation newTA = M.at(t.pos).TypeAnnotation(annotationType, args);
87 newTA.attribute = t.attribute;
88 return newTA;
89 } else {
90 JCAnnotation newT = M.at(t.pos).Annotation(annotationType, args);
91 newT.attribute = t.attribute;
92 return newT;
93 }
94 }
95
96 public JCTree visitAssert(AssertTree node, P p) {
97 JCAssert t = (JCAssert) node;
98 JCExpression cond = copy(t.cond, p);
99 JCExpression detail = copy(t.detail, p);
100 return M.at(t.pos).Assert(cond, detail);
101 }
102
103 public JCTree visitAssignment(AssignmentTree node, P p) {
104 JCAssign t = (JCAssign) node;
105 JCExpression lhs = copy(t.lhs, p);
106 JCExpression rhs = copy(t.rhs, p);
107 return M.at(t.pos).Assign(lhs, rhs);
108 }
109
110 public JCTree visitCompoundAssignment(CompoundAssignmentTree node, P p) {
111 JCAssignOp t = (JCAssignOp) node;
112 JCTree lhs = copy(t.lhs, p);
113 JCTree rhs = copy(t.rhs, p);
114 return M.at(t.pos).Assignop(t.getTag(), lhs, rhs);
115 }
116
117 public JCTree visitBinary(BinaryTree node, P p) {
118 JCBinary t = (JCBinary) node;
119 JCExpression lhs = copy(t.lhs, p);
120 JCExpression rhs = copy(t.rhs, p);
121 return M.at(t.pos).Binary(t.getTag(), lhs, rhs);
122 }
123
124 public JCTree visitBlock(BlockTree node, P p) {
125 JCBlock t = (JCBlock) node;
126 List<JCStatement> stats = copy(t.stats, p);
127 return M.at(t.pos).Block(t.flags, stats);
128 }
129
130 public JCTree visitBreak(BreakTree node, P p) {
131 JCBreak t = (JCBreak) node;
132 return M.at(t.pos).Break(t.label);
133 }
134
135 public JCTree visitCase(CaseTree node, P p) {
136 JCCase t = (JCCase) node;
137 JCExpression pat = copy(t.pat, p);
138 List<JCStatement> stats = copy(t.stats, p);
139 return M.at(t.pos).Case(pat, stats);
140 }
141
142 public JCTree visitCatch(CatchTree node, P p) {
143 JCCatch t = (JCCatch) node;
144 JCVariableDecl param = copy(t.param, p);
145 JCBlock body = copy(t.body, p);
146 return M.at(t.pos).Catch(param, body);
147 }
148
149 public JCTree visitClass(ClassTree node, P p) {
150 JCClassDecl t = (JCClassDecl) node;
151 JCModifiers mods = copy(t.mods, p);
152 List<JCTypeParameter> typarams = copy(t.typarams, p);
153 JCExpression extending = copy(t.extending, p);
154 List<JCExpression> implementing = copy(t.implementing, p);
155 List<JCTree> defs = copy(t.defs, p);
156 return M.at(t.pos).ClassDef(mods, t.name, typarams, extending, implementing, defs);
157 }
158
159 public JCTree visitConditionalExpression(ConditionalExpressionTree node, P p) {
160 JCConditional t = (JCConditional) node;
161 JCExpression cond = copy(t.cond, p);
162 JCExpression truepart = copy(t.truepart, p);
163 JCExpression falsepart = copy(t.falsepart, p);
164 return M.at(t.pos).Conditional(cond, truepart, falsepart);
165 }
166
167 public JCTree visitContinue(ContinueTree node, P p) {
168 JCContinue t = (JCContinue) node;
169 return M.at(t.pos).Continue(t.label);
170 }
171
172 public JCTree visitDoWhileLoop(DoWhileLoopTree node, P p) {
173 JCDoWhileLoop t = (JCDoWhileLoop) node;
174 JCStatement body = copy(t.body, p);
175 JCExpression cond = copy(t.cond, p);
176 return M.at(t.pos).DoLoop(body, cond);
177 }
178
179 public JCTree visitErroneous(ErroneousTree node, P p) {
180 JCErroneous t = (JCErroneous) node;
181 List<? extends JCTree> errs = copy(t.errs, p);
182 return M.at(t.pos).Erroneous(errs);
183 }
184
185 public JCTree visitExpressionStatement(ExpressionStatementTree node, P p) {
186 JCExpressionStatement t = (JCExpressionStatement) node;
187 JCExpression expr = copy(t.expr, p);
188 return M.at(t.pos).Exec(expr);
189 }
190
191 public JCTree visitEnhancedForLoop(EnhancedForLoopTree node, P p) {
192 JCEnhancedForLoop t = (JCEnhancedForLoop) node;
193 JCVariableDecl var = copy(t.var, p);
194 JCExpression expr = copy(t.expr, p);
195 JCStatement body = copy(t.body, p);
196 return M.at(t.pos).ForeachLoop(var, expr, body);
197 }
198
199 public JCTree visitForLoop(ForLoopTree node, P p) {
200 JCForLoop t = (JCForLoop) node;
201 List<JCStatement> init = copy(t.init, p);
202 JCExpression cond = copy(t.cond, p);
203 List<JCExpressionStatement> step = copy(t.step, p);
204 JCStatement body = copy(t.body, p);
205 return M.at(t.pos).ForLoop(init, cond, step, body);
206 }
207
208 public JCTree visitIdentifier(IdentifierTree node, P p) {
209 JCIdent t = (JCIdent) node;
210 return M.at(t.pos).Ident(t.name);
211 }
212
213 public JCTree visitIf(IfTree node, P p) {
214 JCIf t = (JCIf) node;
215 JCExpression cond = copy(t.cond, p);
216 JCStatement thenpart = copy(t.thenpart, p);
217 JCStatement elsepart = copy(t.elsepart, p);
218 return M.at(t.pos).If(cond, thenpart, elsepart);
219 }
220
221 public JCTree visitImport(ImportTree node, P p) {
222 JCImport t = (JCImport) node;
223 JCTree qualid = copy(t.qualid, p);
224 return M.at(t.pos).Import(qualid, t.staticImport);
225 }
226
227 public JCTree visitArrayAccess(ArrayAccessTree node, P p) {
228 JCArrayAccess t = (JCArrayAccess) node;
229 JCExpression indexed = copy(t.indexed, p);
230 JCExpression index = copy(t.index, p);
231 return M.at(t.pos).Indexed(indexed, index);
232 }
233
234 public JCTree visitLabeledStatement(LabeledStatementTree node, P p) {
235 JCLabeledStatement t = (JCLabeledStatement) node;
236 JCStatement body = copy(t.body, p);
237 return M.at(t.pos).Labelled(t.label, body);
238 }
239
240 public JCTree visitLiteral(LiteralTree node, P p) {
241 JCLiteral t = (JCLiteral) node;
242 return M.at(t.pos).Literal(t.typetag, t.value);
243 }
244
245 public JCTree visitMethod(MethodTree node, P p) {
246 JCMethodDecl t = (JCMethodDecl) node;
247 JCModifiers mods = copy(t.mods, p);
248 JCExpression restype = copy(t.restype, p);
249 List<JCTypeParameter> typarams = copy(t.typarams, p);
250 List<JCVariableDecl> params = copy(t.params, p);
251 JCVariableDecl recvparam = copy(t.recvparam, p);
252 List<JCExpression> thrown = copy(t.thrown, p);
253 JCBlock body = copy(t.body, p);
254 JCExpression defaultValue = copy(t.defaultValue, p);
255 return M.at(t.pos).MethodDef(mods, t.name, restype, typarams, recvparam, params, thrown, body, defaultValue);
256 }
257
258 public JCTree visitMethodInvocation(MethodInvocationTree node, P p) {
259 JCMethodInvocation t = (JCMethodInvocation) node;
260 List<JCExpression> typeargs = copy(t.typeargs, p);
261 JCExpression meth = copy(t.meth, p);
262 List<JCExpression> args = copy(t.args, p);
263 return M.at(t.pos).Apply(typeargs, meth, args);
264 }
265
266 public JCTree visitModifiers(ModifiersTree node, P p) {
267 JCModifiers t = (JCModifiers) node;
268 List<JCAnnotation> annotations = copy(t.annotations, p);
269 return M.at(t.pos).Modifiers(t.flags, annotations);
270 }
271
272 public JCTree visitNewArray(NewArrayTree node, P p) {
273 JCNewArray t = (JCNewArray) node;
274 JCExpression elemtype = copy(t.elemtype, p);
275 List<JCExpression> dims = copy(t.dims, p);
276 List<JCExpression> elems = copy(t.elems, p);
277 return M.at(t.pos).NewArray(elemtype, dims, elems);
278 }
279
280 public JCTree visitNewClass(NewClassTree node, P p) {
281 JCNewClass t = (JCNewClass) node;
282 JCExpression encl = copy(t.encl, p);
283 List<JCExpression> typeargs = copy(t.typeargs, p);
284 JCExpression clazz = copy(t.clazz, p);
285 List<JCExpression> args = copy(t.args, p);
286 JCClassDecl def = copy(t.def, p);
287 return M.at(t.pos).NewClass(encl, typeargs, clazz, args, def);
288 }
289
290 public JCTree visitLambdaExpression(LambdaExpressionTree node, P p) {
291 JCLambda t = (JCLambda) node;
292 List<JCVariableDecl> params = copy(t.params, p);
293 JCTree body = copy(t.body, p);
294 return M.at(t.pos).Lambda(params, body);
295 }
296
297 public JCTree visitParenthesized(ParenthesizedTree node, P p) {
298 JCParens t = (JCParens) node;
299 JCExpression expr = copy(t.expr, p);
300 return M.at(t.pos).Parens(expr);
301 }
302
303 public JCTree visitReturn(ReturnTree node, P p) {
304 JCReturn t = (JCReturn) node;
305 JCExpression expr = copy(t.expr, p);
306 return M.at(t.pos).Return(expr);
307 }
308
309 public JCTree visitMemberSelect(MemberSelectTree node, P p) {
310 JCFieldAccess t = (JCFieldAccess) node;
311 JCExpression selected = copy(t.selected, p);
312 return M.at(t.pos).Select(selected, t.name);
313 }
314
315 public JCTree visitMemberReference(MemberReferenceTree node, P p) {
316 JCMemberReference t = (JCMemberReference) node;
317 JCExpression expr = copy(t.expr, p);
318 List<JCExpression> typeargs = copy(t.typeargs, p);
319 return M.at(t.pos).Reference(t.mode, t.name, expr, typeargs);
320 }
321
322 public JCTree visitEmptyStatement(EmptyStatementTree node, P p) {
323 JCSkip t = (JCSkip) node;
324 return M.at(t.pos).Skip();
325 }
326
327 public JCTree visitSwitch(SwitchTree node, P p) {
328 JCSwitch t = (JCSwitch) node;
329 JCExpression selector = copy(t.selector, p);
330 List<JCCase> cases = copy(t.cases, p);
331 return M.at(t.pos).Switch(selector, cases);
332 }
333
334 public JCTree visitSynchronized(SynchronizedTree node, P p) {
335 JCSynchronized t = (JCSynchronized) node;
336 JCExpression lock = copy(t.lock, p);
337 JCBlock body = copy(t.body, p);
338 return M.at(t.pos).Synchronized(lock, body);
339 }
340
341 public JCTree visitThrow(ThrowTree node, P p) {
342 JCThrow t = (JCThrow) node;
343 JCExpression expr = copy(t.expr, p);
344 return M.at(t.pos).Throw(expr);
345 }
346
347 public JCTree visitCompilationUnit(CompilationUnitTree node, P p) {
348 JCCompilationUnit t = (JCCompilationUnit) node;
349 List<JCAnnotation> packageAnnotations = copy(t.packageAnnotations, p);
350 JCExpression pid = copy(t.pid, p);
351 List<JCTree> defs = copy(t.defs, p);
352 return M.at(t.pos).TopLevel(packageAnnotations, pid, defs);
353 }
354
355 public JCTree visitTry(TryTree node, P p) {
356 JCTry t = (JCTry) node;
357 List<JCTree> resources = copy(t.resources, p);
358 JCBlock body = copy(t.body, p);
359 List<JCCatch> catchers = copy(t.catchers, p);
360 JCBlock finalizer = copy(t.finalizer, p);
361 return M.at(t.pos).Try(resources, body, catchers, finalizer);
362 }
363
364 public JCTree visitParameterizedType(ParameterizedTypeTree node, P p) {
365 JCTypeApply t = (JCTypeApply) node;
366 JCExpression clazz = copy(t.clazz, p);
367 List<JCExpression> arguments = copy(t.arguments, p);
368 return M.at(t.pos).TypeApply(clazz, arguments);
369 }
370
371 public JCTree visitUnionType(UnionTypeTree node, P p) {
372 JCTypeUnion t = (JCTypeUnion) node;
373 List<JCExpression> components = copy(t.alternatives, p);
374 return M.at(t.pos).TypeUnion(components);
375 }
376
377 public JCTree visitIntersectionType(IntersectionTypeTree node, P p) {
378 JCTypeIntersection t = (JCTypeIntersection) node;
379 List<JCExpression> bounds = copy(t.bounds, p);
380 return M.at(t.pos).TypeIntersection(bounds);
381 }
382
383 public JCTree visitArrayType(ArrayTypeTree node, P p) {
384 JCArrayTypeTree t = (JCArrayTypeTree) node;
385 JCExpression elemtype = copy(t.elemtype, p);
386 return M.at(t.pos).TypeArray(elemtype);
387 }
388
389 public JCTree visitTypeCast(TypeCastTree node, P p) {
390 JCTypeCast t = (JCTypeCast) node;
391 JCTree clazz = copy(t.clazz, p);
392 JCExpression expr = copy(t.expr, p);
393 return M.at(t.pos).TypeCast(clazz, expr);
394 }
395
396 public JCTree visitPrimitiveType(PrimitiveTypeTree node, P p) {
397 JCPrimitiveTypeTree t = (JCPrimitiveTypeTree) node;
398 return M.at(t.pos).TypeIdent(t.typetag);
399 }
400
401 public JCTree visitTypeParameter(TypeParameterTree node, P p) {
402 JCTypeParameter t = (JCTypeParameter) node;
403 List<JCAnnotation> annos = copy(t.annotations, p);
404 List<JCExpression> bounds = copy(t.bounds, p);
405 return M.at(t.pos).TypeParameter(t.name, bounds, annos);
406 }
407
408 public JCTree visitInstanceOf(InstanceOfTree node, P p) {
409 JCInstanceOf t = (JCInstanceOf) node;
410 JCExpression expr = copy(t.expr, p);
411 JCTree clazz = copy(t.clazz, p);
412 return M.at(t.pos).TypeTest(expr, clazz);
413 }
414
415 public JCTree visitUnary(UnaryTree node, P p) {
416 JCUnary t = (JCUnary) node;
417 JCExpression arg = copy(t.arg, p);
418 return M.at(t.pos).Unary(t.getTag(), arg);
419 }
420
421 public JCTree visitVariable(VariableTree node, P p) {
422 JCVariableDecl t = (JCVariableDecl) node;
423 JCModifiers mods = copy(t.mods, p);
424 JCExpression vartype = copy(t.vartype, p);
425 if (t.nameexpr == null) {
426 JCExpression init = copy(t.init, p);
427 return M.at(t.pos).VarDef(mods, t.name, vartype, init);
428 } else {
429 JCExpression nameexpr = copy(t.nameexpr, p);
430 return M.at(t.pos).ReceiverVarDef(mods, nameexpr, vartype);
431 }
432 }
433
434 public JCTree visitWhileLoop(WhileLoopTree node, P p) {
435 JCWhileLoop t = (JCWhileLoop) node;
436 JCStatement body = copy(t.body, p);
437 JCExpression cond = copy(t.cond, p);
438 return M.at(t.pos).WhileLoop(cond, body);
439 }
440
441 public JCTree visitWildcard(WildcardTree node, P p) {
442 JCWildcard t = (JCWildcard) node;
443 TypeBoundKind kind = M.at(t.kind.pos).TypeBoundKind(t.kind.kind);
444 JCTree inner = copy(t.inner, p);
445 return M.at(t.pos).Wildcard(kind, inner);
446 }
447
448 public JCTree visitOther(Tree node, P p) {
449 JCTree tree = (JCTree) node;
450 switch (tree.getTag()) {
451 case LETEXPR: {
452 LetExpr t = (LetExpr) node;
453 List<JCVariableDecl> defs = copy(t.defs, p);
454 JCTree expr = copy(t.expr, p);
455 return M.at(t.pos).LetExpr(defs, expr);
456 }
457 default:
458 throw new AssertionError("unknown tree tag: " + tree.getTag());
459 }
460 }
461
462 }

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