| /* |
| * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.tools.javac.tree; |
| |
| import com.sun.tools.javac.util.*; |
| import com.sun.tools.javac.tree.JCTree.*; |
| |
| /** A subclass of Tree.Visitor, this class defines |
| * a general tree translator pattern. Translation proceeds recursively in |
| * left-to-right order down a tree, constructing translated nodes by |
| * overwriting existing ones. There is one visitor method in this class |
| * for every possible kind of tree node. To obtain a specific |
| * translator, it suffices to override those visitor methods which |
| * do some interesting work. The translator class itself takes care of all |
| * navigational aspects. |
| * |
| * <p><b>This is NOT part of any supported API. |
| * If you write code that depends on this, you do so at your own risk. |
| * This code and its internal interfaces are subject to change or |
| * deletion without notice.</b> |
| */ |
| public class TreeTranslator extends JCTree.Visitor { |
| |
| /** Visitor result field: a tree |
| */ |
| protected JCTree result; |
| |
| /** Visitor method: Translate a single node. |
| */ |
| @SuppressWarnings("unchecked") |
| public <T extends JCTree> T translate(T tree) { |
| if (tree == null) { |
| return null; |
| } else { |
| tree.accept(this); |
| JCTree tmpResult = this.result; |
| this.result = null; |
| return (T)tmpResult; // XXX cast |
| } |
| } |
| |
| /** Visitor method: translate a list of nodes. |
| */ |
| public <T extends JCTree> List<T> translate(List<T> trees) { |
| if (trees == null) return null; |
| for (List<T> l = trees; l.nonEmpty(); l = l.tail) |
| l.head = translate(l.head); |
| return trees; |
| } |
| |
| /** Visitor method: translate a list of variable definitions. |
| */ |
| public List<JCVariableDecl> translateVarDefs(List<JCVariableDecl> trees) { |
| for (List<JCVariableDecl> l = trees; l.nonEmpty(); l = l.tail) |
| l.head = translate(l.head); |
| return trees; |
| } |
| |
| /** Visitor method: translate a list of type parameters. |
| */ |
| public List<JCTypeParameter> translateTypeParams(List<JCTypeParameter> trees) { |
| for (List<JCTypeParameter> l = trees; l.nonEmpty(); l = l.tail) |
| l.head = translate(l.head); |
| return trees; |
| } |
| |
| /** Visitor method: translate a list of case parts of switch statements. |
| */ |
| public List<JCCase> translateCases(List<JCCase> trees) { |
| for (List<JCCase> l = trees; l.nonEmpty(); l = l.tail) |
| l.head = translate(l.head); |
| return trees; |
| } |
| |
| /** Visitor method: translate a list of catch clauses in try statements. |
| */ |
| public List<JCCatch> translateCatchers(List<JCCatch> trees) { |
| for (List<JCCatch> l = trees; l.nonEmpty(); l = l.tail) |
| l.head = translate(l.head); |
| return trees; |
| } |
| |
| /** Visitor method: translate a list of catch clauses in try statements. |
| */ |
| public List<JCAnnotation> translateAnnotations(List<JCAnnotation> trees) { |
| for (List<JCAnnotation> l = trees; l.nonEmpty(); l = l.tail) |
| l.head = translate(l.head); |
| return trees; |
| } |
| |
| /* *************************************************************************** |
| * Visitor methods |
| ****************************************************************************/ |
| |
| public void visitTopLevel(JCCompilationUnit tree) { |
| tree.defs = translate(tree.defs); |
| result = tree; |
| } |
| |
| public void visitPackageDef(JCPackageDecl tree) { |
| tree.annotations = translate(tree.annotations); |
| tree.pid = translate(tree.pid); |
| result = tree; |
| } |
| |
| public void visitImport(JCImport tree) { |
| tree.qualid = translate(tree.qualid); |
| result = tree; |
| } |
| |
| public void visitClassDef(JCClassDecl tree) { |
| tree.mods = translate(tree.mods); |
| tree.typarams = translateTypeParams(tree.typarams); |
| tree.extending = translate(tree.extending); |
| tree.implementing = translate(tree.implementing); |
| tree.defs = translate(tree.defs); |
| result = tree; |
| } |
| |
| public void visitMethodDef(JCMethodDecl tree) { |
| tree.mods = translate(tree.mods); |
| tree.restype = translate(tree.restype); |
| tree.typarams = translateTypeParams(tree.typarams); |
| tree.recvparam = translate(tree.recvparam); |
| tree.params = translateVarDefs(tree.params); |
| tree.thrown = translate(tree.thrown); |
| tree.body = translate(tree.body); |
| result = tree; |
| } |
| |
| public void visitVarDef(JCVariableDecl tree) { |
| tree.mods = translate(tree.mods); |
| tree.nameexpr = translate(tree.nameexpr); |
| tree.vartype = translate(tree.vartype); |
| tree.init = translate(tree.init); |
| result = tree; |
| } |
| |
| public void visitSkip(JCSkip tree) { |
| result = tree; |
| } |
| |
| public void visitBlock(JCBlock tree) { |
| tree.stats = translate(tree.stats); |
| result = tree; |
| } |
| |
| public void visitDoLoop(JCDoWhileLoop tree) { |
| tree.body = translate(tree.body); |
| tree.cond = translate(tree.cond); |
| result = tree; |
| } |
| |
| public void visitWhileLoop(JCWhileLoop tree) { |
| tree.cond = translate(tree.cond); |
| tree.body = translate(tree.body); |
| result = tree; |
| } |
| |
| public void visitForLoop(JCForLoop tree) { |
| tree.init = translate(tree.init); |
| tree.cond = translate(tree.cond); |
| tree.step = translate(tree.step); |
| tree.body = translate(tree.body); |
| result = tree; |
| } |
| |
| public void visitForeachLoop(JCEnhancedForLoop tree) { |
| tree.var = translate(tree.var); |
| tree.expr = translate(tree.expr); |
| tree.body = translate(tree.body); |
| result = tree; |
| } |
| |
| public void visitLabelled(JCLabeledStatement tree) { |
| tree.body = translate(tree.body); |
| result = tree; |
| } |
| |
| public void visitSwitch(JCSwitch tree) { |
| tree.selector = translate(tree.selector); |
| tree.cases = translateCases(tree.cases); |
| result = tree; |
| } |
| |
| public void visitCase(JCCase tree) { |
| tree.pat = translate(tree.pat); |
| tree.stats = translate(tree.stats); |
| result = tree; |
| } |
| |
| public void visitSynchronized(JCSynchronized tree) { |
| tree.lock = translate(tree.lock); |
| tree.body = translate(tree.body); |
| result = tree; |
| } |
| |
| public void visitTry(JCTry tree) { |
| tree.resources = translate(tree.resources); |
| tree.body = translate(tree.body); |
| tree.catchers = translateCatchers(tree.catchers); |
| tree.finalizer = translate(tree.finalizer); |
| result = tree; |
| } |
| |
| public void visitCatch(JCCatch tree) { |
| tree.param = translate(tree.param); |
| tree.body = translate(tree.body); |
| result = tree; |
| } |
| |
| public void visitConditional(JCConditional tree) { |
| tree.cond = translate(tree.cond); |
| tree.truepart = translate(tree.truepart); |
| tree.falsepart = translate(tree.falsepart); |
| result = tree; |
| } |
| |
| public void visitIf(JCIf tree) { |
| tree.cond = translate(tree.cond); |
| tree.thenpart = translate(tree.thenpart); |
| tree.elsepart = translate(tree.elsepart); |
| result = tree; |
| } |
| |
| public void visitExec(JCExpressionStatement tree) { |
| tree.expr = translate(tree.expr); |
| result = tree; |
| } |
| |
| public void visitBreak(JCBreak tree) { |
| result = tree; |
| } |
| |
| public void visitContinue(JCContinue tree) { |
| result = tree; |
| } |
| |
| public void visitReturn(JCReturn tree) { |
| tree.expr = translate(tree.expr); |
| result = tree; |
| } |
| |
| public void visitThrow(JCThrow tree) { |
| tree.expr = translate(tree.expr); |
| result = tree; |
| } |
| |
| public void visitAssert(JCAssert tree) { |
| tree.cond = translate(tree.cond); |
| tree.detail = translate(tree.detail); |
| result = tree; |
| } |
| |
| public void visitApply(JCMethodInvocation tree) { |
| tree.meth = translate(tree.meth); |
| tree.args = translate(tree.args); |
| result = tree; |
| } |
| |
| public void visitNewClass(JCNewClass tree) { |
| tree.encl = translate(tree.encl); |
| tree.clazz = translate(tree.clazz); |
| tree.args = translate(tree.args); |
| tree.def = translate(tree.def); |
| result = tree; |
| } |
| |
| public void visitLambda(JCLambda tree) { |
| tree.params = translate(tree.params); |
| tree.body = translate(tree.body); |
| result = tree; |
| } |
| |
| public void visitNewArray(JCNewArray tree) { |
| tree.annotations = translate(tree.annotations); |
| List<List<JCAnnotation>> dimAnnos = List.nil(); |
| for (List<JCAnnotation> origDimAnnos : tree.dimAnnotations) |
| dimAnnos = dimAnnos.append(translate(origDimAnnos)); |
| tree.dimAnnotations = dimAnnos; |
| tree.elemtype = translate(tree.elemtype); |
| tree.dims = translate(tree.dims); |
| tree.elems = translate(tree.elems); |
| result = tree; |
| } |
| |
| public void visitParens(JCParens tree) { |
| tree.expr = translate(tree.expr); |
| result = tree; |
| } |
| |
| public void visitAssign(JCAssign tree) { |
| tree.lhs = translate(tree.lhs); |
| tree.rhs = translate(tree.rhs); |
| result = tree; |
| } |
| |
| public void visitAssignop(JCAssignOp tree) { |
| tree.lhs = translate(tree.lhs); |
| tree.rhs = translate(tree.rhs); |
| result = tree; |
| } |
| |
| public void visitUnary(JCUnary tree) { |
| tree.arg = translate(tree.arg); |
| result = tree; |
| } |
| |
| public void visitBinary(JCBinary tree) { |
| tree.lhs = translate(tree.lhs); |
| tree.rhs = translate(tree.rhs); |
| result = tree; |
| } |
| |
| public void visitTypeCast(JCTypeCast tree) { |
| tree.clazz = translate(tree.clazz); |
| tree.expr = translate(tree.expr); |
| result = tree; |
| } |
| |
| public void visitTypeTest(JCInstanceOf tree) { |
| tree.expr = translate(tree.expr); |
| tree.clazz = translate(tree.clazz); |
| result = tree; |
| } |
| |
| public void visitIndexed(JCArrayAccess tree) { |
| tree.indexed = translate(tree.indexed); |
| tree.index = translate(tree.index); |
| result = tree; |
| } |
| |
| public void visitSelect(JCFieldAccess tree) { |
| tree.selected = translate(tree.selected); |
| result = tree; |
| } |
| |
| public void visitReference(JCMemberReference tree) { |
| tree.expr = translate(tree.expr); |
| result = tree; |
| } |
| |
| public void visitIdent(JCIdent tree) { |
| result = tree; |
| } |
| |
| public void visitLiteral(JCLiteral tree) { |
| result = tree; |
| } |
| |
| public void visitTypeIdent(JCPrimitiveTypeTree tree) { |
| result = tree; |
| } |
| |
| public void visitTypeArray(JCArrayTypeTree tree) { |
| tree.elemtype = translate(tree.elemtype); |
| result = tree; |
| } |
| |
| public void visitTypeApply(JCTypeApply tree) { |
| tree.clazz = translate(tree.clazz); |
| tree.arguments = translate(tree.arguments); |
| result = tree; |
| } |
| |
| public void visitTypeUnion(JCTypeUnion tree) { |
| tree.alternatives = translate(tree.alternatives); |
| result = tree; |
| } |
| |
| public void visitTypeIntersection(JCTypeIntersection tree) { |
| tree.bounds = translate(tree.bounds); |
| result = tree; |
| } |
| |
| public void visitTypeParameter(JCTypeParameter tree) { |
| tree.annotations = translate(tree.annotations); |
| tree.bounds = translate(tree.bounds); |
| result = tree; |
| } |
| |
| @Override |
| public void visitWildcard(JCWildcard tree) { |
| tree.kind = translate(tree.kind); |
| tree.inner = translate(tree.inner); |
| result = tree; |
| } |
| |
| @Override |
| public void visitTypeBoundKind(TypeBoundKind tree) { |
| result = tree; |
| } |
| |
| public void visitErroneous(JCErroneous tree) { |
| result = tree; |
| } |
| |
| public void visitLetExpr(LetExpr tree) { |
| tree.defs = translateVarDefs(tree.defs); |
| tree.expr = translate(tree.expr); |
| result = tree; |
| } |
| |
| public void visitModifiers(JCModifiers tree) { |
| tree.annotations = translateAnnotations(tree.annotations); |
| result = tree; |
| } |
| |
| public void visitAnnotation(JCAnnotation tree) { |
| tree.annotationType = translate(tree.annotationType); |
| tree.args = translate(tree.args); |
| result = tree; |
| } |
| |
| public void visitAnnotatedType(JCAnnotatedType tree) { |
| tree.annotations = translate(tree.annotations); |
| tree.underlyingType = translate(tree.underlyingType); |
| result = tree; |
| } |
| |
| public void visitTree(JCTree tree) { |
| throw new AssertionError(tree); |
| } |
| } |