1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/share/classes/com/sun/tools/javac/tree/TreeTranslator.java Sat Dec 01 00:00:00 2007 +0000 1.3 @@ -0,0 +1,406 @@ 1.4 +/* 1.5 + * Copyright 1999-2006 Sun Microsystems, Inc. All Rights Reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. Sun designates this 1.11 + * particular file as subject to the "Classpath" exception as provided 1.12 + * by Sun in the LICENSE file that accompanied this code. 1.13 + * 1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.17 + * version 2 for more details (a copy is included in the LICENSE file that 1.18 + * accompanied this code). 1.19 + * 1.20 + * You should have received a copy of the GNU General Public License version 1.21 + * 2 along with this work; if not, write to the Free Software Foundation, 1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.23 + * 1.24 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 1.25 + * CA 95054 USA or visit www.sun.com if you need additional information or 1.26 + * have any questions. 1.27 + */ 1.28 + 1.29 +package com.sun.tools.javac.tree; 1.30 + 1.31 +import com.sun.tools.javac.util.*; 1.32 +import com.sun.tools.javac.tree.JCTree.*; 1.33 + 1.34 +/** A subclass of Tree.Visitor, this class defines 1.35 + * a general tree translator pattern. Translation proceeds recursively in 1.36 + * left-to-right order down a tree, constructing translated nodes by 1.37 + * overwriting existing ones. There is one visitor method in this class 1.38 + * for every possible kind of tree node. To obtain a specific 1.39 + * translator, it suffices to override those visitor methods which 1.40 + * do some interesting work. The translator class itself takes care of all 1.41 + * navigational aspects. 1.42 + * 1.43 + * <p><b>This is NOT part of any API supported by Sun Microsystems. If 1.44 + * you write code that depends on this, you do so at your own risk. 1.45 + * This code and its internal interfaces are subject to change or 1.46 + * deletion without notice.</b> 1.47 + */ 1.48 +public class TreeTranslator extends JCTree.Visitor { 1.49 + 1.50 + /** Visitor result field: a tree 1.51 + */ 1.52 + protected JCTree result; 1.53 + 1.54 + /** Visitor method: Translate a single node. 1.55 + */ 1.56 + @SuppressWarnings("unchecked") 1.57 + public <T extends JCTree> T translate(T tree) { 1.58 + if (tree == null) { 1.59 + return null; 1.60 + } else { 1.61 + tree.accept(this); 1.62 + JCTree result = this.result; 1.63 + this.result = null; 1.64 + return (T)result; // XXX cast 1.65 + } 1.66 + } 1.67 + 1.68 + /** Visitor method: translate a list of nodes. 1.69 + */ 1.70 + public <T extends JCTree> List<T> translate(List<T> trees) { 1.71 + if (trees == null) return null; 1.72 + for (List<T> l = trees; l.nonEmpty(); l = l.tail) 1.73 + l.head = translate(l.head); 1.74 + return trees; 1.75 + } 1.76 + 1.77 + /** Visitor method: translate a list of variable definitions. 1.78 + */ 1.79 + public List<JCVariableDecl> translateVarDefs(List<JCVariableDecl> trees) { 1.80 + for (List<JCVariableDecl> l = trees; l.nonEmpty(); l = l.tail) 1.81 + l.head = translate(l.head); 1.82 + return trees; 1.83 + } 1.84 + 1.85 + /** Visitor method: translate a list of type parameters. 1.86 + */ 1.87 + public List<JCTypeParameter> translateTypeParams(List<JCTypeParameter> trees) { 1.88 + for (List<JCTypeParameter> l = trees; l.nonEmpty(); l = l.tail) 1.89 + l.head = translate(l.head); 1.90 + return trees; 1.91 + } 1.92 + 1.93 + /** Visitor method: translate a list of case parts of switch statements. 1.94 + */ 1.95 + public List<JCCase> translateCases(List<JCCase> trees) { 1.96 + for (List<JCCase> l = trees; l.nonEmpty(); l = l.tail) 1.97 + l.head = translate(l.head); 1.98 + return trees; 1.99 + } 1.100 + 1.101 + /** Visitor method: translate a list of catch clauses in try statements. 1.102 + */ 1.103 + public List<JCCatch> translateCatchers(List<JCCatch> trees) { 1.104 + for (List<JCCatch> l = trees; l.nonEmpty(); l = l.tail) 1.105 + l.head = translate(l.head); 1.106 + return trees; 1.107 + } 1.108 + 1.109 + /** Visitor method: translate a list of catch clauses in try statements. 1.110 + */ 1.111 + public List<JCAnnotation> translateAnnotations(List<JCAnnotation> trees) { 1.112 + for (List<JCAnnotation> l = trees; l.nonEmpty(); l = l.tail) 1.113 + l.head = translate(l.head); 1.114 + return trees; 1.115 + } 1.116 + 1.117 +/* *************************************************************************** 1.118 + * Visitor methods 1.119 + ****************************************************************************/ 1.120 + 1.121 + public void visitTopLevel(JCCompilationUnit tree) { 1.122 + tree.pid = translate(tree.pid); 1.123 + tree.defs = translate(tree.defs); 1.124 + result = tree; 1.125 + } 1.126 + 1.127 + public void visitImport(JCImport tree) { 1.128 + tree.qualid = translate(tree.qualid); 1.129 + result = tree; 1.130 + } 1.131 + 1.132 + public void visitClassDef(JCClassDecl tree) { 1.133 + tree.mods = translate(tree.mods); 1.134 + tree.typarams = translateTypeParams(tree.typarams); 1.135 + tree.extending = translate(tree.extending); 1.136 + tree.implementing = translate(tree.implementing); 1.137 + tree.defs = translate(tree.defs); 1.138 + result = tree; 1.139 + } 1.140 + 1.141 + public void visitMethodDef(JCMethodDecl tree) { 1.142 + tree.mods = translate(tree.mods); 1.143 + tree.restype = translate(tree.restype); 1.144 + tree.typarams = translateTypeParams(tree.typarams); 1.145 + tree.params = translateVarDefs(tree.params); 1.146 + tree.thrown = translate(tree.thrown); 1.147 + tree.body = translate(tree.body); 1.148 + result = tree; 1.149 + } 1.150 + 1.151 + public void visitVarDef(JCVariableDecl tree) { 1.152 + tree.mods = translate(tree.mods); 1.153 + tree.vartype = translate(tree.vartype); 1.154 + tree.init = translate(tree.init); 1.155 + result = tree; 1.156 + } 1.157 + 1.158 + public void visitSkip(JCSkip tree) { 1.159 + result = tree; 1.160 + } 1.161 + 1.162 + public void visitBlock(JCBlock tree) { 1.163 + tree.stats = translate(tree.stats); 1.164 + result = tree; 1.165 + } 1.166 + 1.167 + public void visitDoLoop(JCDoWhileLoop tree) { 1.168 + tree.body = translate(tree.body); 1.169 + tree.cond = translate(tree.cond); 1.170 + result = tree; 1.171 + } 1.172 + 1.173 + public void visitWhileLoop(JCWhileLoop tree) { 1.174 + tree.cond = translate(tree.cond); 1.175 + tree.body = translate(tree.body); 1.176 + result = tree; 1.177 + } 1.178 + 1.179 + public void visitForLoop(JCForLoop tree) { 1.180 + tree.init = translate(tree.init); 1.181 + tree.cond = translate(tree.cond); 1.182 + tree.step = translate(tree.step); 1.183 + tree.body = translate(tree.body); 1.184 + result = tree; 1.185 + } 1.186 + 1.187 + public void visitForeachLoop(JCEnhancedForLoop tree) { 1.188 + tree.var = translate(tree.var); 1.189 + tree.expr = translate(tree.expr); 1.190 + tree.body = translate(tree.body); 1.191 + result = tree; 1.192 + } 1.193 + 1.194 + public void visitLabelled(JCLabeledStatement tree) { 1.195 + tree.body = translate(tree.body); 1.196 + result = tree; 1.197 + } 1.198 + 1.199 + public void visitSwitch(JCSwitch tree) { 1.200 + tree.selector = translate(tree.selector); 1.201 + tree.cases = translateCases(tree.cases); 1.202 + result = tree; 1.203 + } 1.204 + 1.205 + public void visitCase(JCCase tree) { 1.206 + tree.pat = translate(tree.pat); 1.207 + tree.stats = translate(tree.stats); 1.208 + result = tree; 1.209 + } 1.210 + 1.211 + public void visitSynchronized(JCSynchronized tree) { 1.212 + tree.lock = translate(tree.lock); 1.213 + tree.body = translate(tree.body); 1.214 + result = tree; 1.215 + } 1.216 + 1.217 + public void visitTry(JCTry tree) { 1.218 + tree.body = translate(tree.body); 1.219 + tree.catchers = translateCatchers(tree.catchers); 1.220 + tree.finalizer = translate(tree.finalizer); 1.221 + result = tree; 1.222 + } 1.223 + 1.224 + public void visitCatch(JCCatch tree) { 1.225 + tree.param = translate(tree.param); 1.226 + tree.body = translate(tree.body); 1.227 + result = tree; 1.228 + } 1.229 + 1.230 + public void visitConditional(JCConditional tree) { 1.231 + tree.cond = translate(tree.cond); 1.232 + tree.truepart = translate(tree.truepart); 1.233 + tree.falsepart = translate(tree.falsepart); 1.234 + result = tree; 1.235 + } 1.236 + 1.237 + public void visitIf(JCIf tree) { 1.238 + tree.cond = translate(tree.cond); 1.239 + tree.thenpart = translate(tree.thenpart); 1.240 + tree.elsepart = translate(tree.elsepart); 1.241 + result = tree; 1.242 + } 1.243 + 1.244 + public void visitExec(JCExpressionStatement tree) { 1.245 + tree.expr = translate(tree.expr); 1.246 + result = tree; 1.247 + } 1.248 + 1.249 + public void visitBreak(JCBreak tree) { 1.250 + result = tree; 1.251 + } 1.252 + 1.253 + public void visitContinue(JCContinue tree) { 1.254 + result = tree; 1.255 + } 1.256 + 1.257 + public void visitReturn(JCReturn tree) { 1.258 + tree.expr = translate(tree.expr); 1.259 + result = tree; 1.260 + } 1.261 + 1.262 + public void visitThrow(JCThrow tree) { 1.263 + tree.expr = translate(tree.expr); 1.264 + result = tree; 1.265 + } 1.266 + 1.267 + public void visitAssert(JCAssert tree) { 1.268 + tree.cond = translate(tree.cond); 1.269 + tree.detail = translate(tree.detail); 1.270 + result = tree; 1.271 + } 1.272 + 1.273 + public void visitApply(JCMethodInvocation tree) { 1.274 + tree.meth = translate(tree.meth); 1.275 + tree.args = translate(tree.args); 1.276 + result = tree; 1.277 + } 1.278 + 1.279 + public void visitNewClass(JCNewClass tree) { 1.280 + tree.encl = translate(tree.encl); 1.281 + tree.clazz = translate(tree.clazz); 1.282 + tree.args = translate(tree.args); 1.283 + tree.def = translate(tree.def); 1.284 + result = tree; 1.285 + } 1.286 + 1.287 + public void visitNewArray(JCNewArray tree) { 1.288 + tree.elemtype = translate(tree.elemtype); 1.289 + tree.dims = translate(tree.dims); 1.290 + tree.elems = translate(tree.elems); 1.291 + result = tree; 1.292 + } 1.293 + 1.294 + public void visitParens(JCParens tree) { 1.295 + tree.expr = translate(tree.expr); 1.296 + result = tree; 1.297 + } 1.298 + 1.299 + public void visitAssign(JCAssign tree) { 1.300 + tree.lhs = translate(tree.lhs); 1.301 + tree.rhs = translate(tree.rhs); 1.302 + result = tree; 1.303 + } 1.304 + 1.305 + public void visitAssignop(JCAssignOp tree) { 1.306 + tree.lhs = translate(tree.lhs); 1.307 + tree.rhs = translate(tree.rhs); 1.308 + result = tree; 1.309 + } 1.310 + 1.311 + public void visitUnary(JCUnary tree) { 1.312 + tree.arg = translate(tree.arg); 1.313 + result = tree; 1.314 + } 1.315 + 1.316 + public void visitBinary(JCBinary tree) { 1.317 + tree.lhs = translate(tree.lhs); 1.318 + tree.rhs = translate(tree.rhs); 1.319 + result = tree; 1.320 + } 1.321 + 1.322 + public void visitTypeCast(JCTypeCast tree) { 1.323 + tree.clazz = translate(tree.clazz); 1.324 + tree.expr = translate(tree.expr); 1.325 + result = tree; 1.326 + } 1.327 + 1.328 + public void visitTypeTest(JCInstanceOf tree) { 1.329 + tree.expr = translate(tree.expr); 1.330 + tree.clazz = translate(tree.clazz); 1.331 + result = tree; 1.332 + } 1.333 + 1.334 + public void visitIndexed(JCArrayAccess tree) { 1.335 + tree.indexed = translate(tree.indexed); 1.336 + tree.index = translate(tree.index); 1.337 + result = tree; 1.338 + } 1.339 + 1.340 + public void visitSelect(JCFieldAccess tree) { 1.341 + tree.selected = translate(tree.selected); 1.342 + result = tree; 1.343 + } 1.344 + 1.345 + public void visitIdent(JCIdent tree) { 1.346 + result = tree; 1.347 + } 1.348 + 1.349 + public void visitLiteral(JCLiteral tree) { 1.350 + result = tree; 1.351 + } 1.352 + 1.353 + public void visitTypeIdent(JCPrimitiveTypeTree tree) { 1.354 + result = tree; 1.355 + } 1.356 + 1.357 + public void visitTypeArray(JCArrayTypeTree tree) { 1.358 + tree.elemtype = translate(tree.elemtype); 1.359 + result = tree; 1.360 + } 1.361 + 1.362 + public void visitTypeApply(JCTypeApply tree) { 1.363 + tree.clazz = translate(tree.clazz); 1.364 + tree.arguments = translate(tree.arguments); 1.365 + result = tree; 1.366 + } 1.367 + 1.368 + public void visitTypeParameter(JCTypeParameter tree) { 1.369 + tree.bounds = translate(tree.bounds); 1.370 + result = tree; 1.371 + } 1.372 + 1.373 + @Override 1.374 + public void visitWildcard(JCWildcard tree) { 1.375 + tree.kind = translate(tree.kind); 1.376 + tree.inner = translate(tree.inner); 1.377 + result = tree; 1.378 + } 1.379 + 1.380 + @Override 1.381 + public void visitTypeBoundKind(TypeBoundKind tree) { 1.382 + result = tree; 1.383 + } 1.384 + 1.385 + public void visitErroneous(JCErroneous tree) { 1.386 + result = tree; 1.387 + } 1.388 + 1.389 + public void visitLetExpr(LetExpr tree) { 1.390 + tree.defs = translateVarDefs(tree.defs); 1.391 + tree.expr = translate(tree.expr); 1.392 + result = tree; 1.393 + } 1.394 + 1.395 + public void visitModifiers(JCModifiers tree) { 1.396 + tree.annotations = translateAnnotations(tree.annotations); 1.397 + result = tree; 1.398 + } 1.399 + 1.400 + public void visitAnnotation(JCAnnotation tree) { 1.401 + tree.annotationType = translate(tree.annotationType); 1.402 + tree.args = translate(tree.args); 1.403 + result = tree; 1.404 + } 1.405 + 1.406 + public void visitTree(JCTree tree) { 1.407 + throw new AssertionError(tree); 1.408 + } 1.409 +}