aoqi@0: /* aoqi@0: * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. aoqi@0: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. aoqi@0: * aoqi@0: * This code is free software; you can redistribute it and/or modify it aoqi@0: * under the terms of the GNU General Public License version 2 only, as aoqi@0: * published by the Free Software Foundation. Oracle designates this aoqi@0: * particular file as subject to the "Classpath" exception as provided aoqi@0: * by Oracle in the LICENSE file that accompanied this code. aoqi@0: * aoqi@0: * This code is distributed in the hope that it will be useful, but WITHOUT aoqi@0: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or aoqi@0: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License aoqi@0: * version 2 for more details (a copy is included in the LICENSE file that aoqi@0: * accompanied this code). aoqi@0: * aoqi@0: * You should have received a copy of the GNU General Public License version aoqi@0: * 2 along with this work; if not, write to the Free Software Foundation, aoqi@0: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. aoqi@0: * aoqi@0: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA aoqi@0: * or visit www.oracle.com if you need additional information or have any aoqi@0: * questions. aoqi@0: */ aoqi@0: aoqi@0: package com.sun.tools.javac.tree; aoqi@0: aoqi@0: import com.sun.tools.javac.util.*; aoqi@0: import com.sun.tools.javac.tree.JCTree.*; aoqi@0: aoqi@0: /** A subclass of Tree.Visitor, this class defines aoqi@0: * a general tree scanner pattern. Translation proceeds recursively in aoqi@0: * left-to-right order down a tree. There is one visitor method in this class aoqi@0: * for every possible kind of tree node. To obtain a specific aoqi@0: * scanner, it suffices to override those visitor methods which aoqi@0: * do some interesting work. The scanner class itself takes care of all aoqi@0: * navigational aspects. aoqi@0: * aoqi@0: *

This is NOT part of any supported API. aoqi@0: * If you write code that depends on this, you do so at your own risk. aoqi@0: * This code and its internal interfaces are subject to change or aoqi@0: * deletion without notice. aoqi@0: */ aoqi@0: public class TreeScanner extends Visitor { aoqi@0: aoqi@0: /** Visitor method: Scan a single node. aoqi@0: */ aoqi@0: public void scan(JCTree tree) { aoqi@0: if(tree!=null) tree.accept(this); aoqi@0: } aoqi@0: aoqi@0: /** Visitor method: scan a list of nodes. aoqi@0: */ aoqi@0: public void scan(List trees) { aoqi@0: if (trees != null) aoqi@0: for (List l = trees; l.nonEmpty(); l = l.tail) aoqi@0: scan(l.head); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: /* *************************************************************************** aoqi@0: * Visitor methods aoqi@0: ****************************************************************************/ aoqi@0: aoqi@0: public void visitTopLevel(JCCompilationUnit tree) { aoqi@0: scan(tree.packageAnnotations); aoqi@0: scan(tree.pid); aoqi@0: scan(tree.defs); aoqi@0: } aoqi@0: aoqi@0: public void visitImport(JCImport tree) { aoqi@0: scan(tree.qualid); aoqi@0: } aoqi@0: aoqi@0: public void visitClassDef(JCClassDecl tree) { aoqi@0: scan(tree.mods); aoqi@0: scan(tree.typarams); aoqi@0: scan(tree.extending); aoqi@0: scan(tree.implementing); aoqi@0: scan(tree.defs); aoqi@0: } aoqi@0: aoqi@0: public void visitMethodDef(JCMethodDecl tree) { aoqi@0: scan(tree.mods); aoqi@0: scan(tree.restype); aoqi@0: scan(tree.typarams); aoqi@0: scan(tree.recvparam); aoqi@0: scan(tree.params); aoqi@0: scan(tree.thrown); aoqi@0: scan(tree.defaultValue); aoqi@0: scan(tree.body); aoqi@0: } aoqi@0: aoqi@0: public void visitVarDef(JCVariableDecl tree) { aoqi@0: scan(tree.mods); aoqi@0: scan(tree.vartype); aoqi@0: scan(tree.nameexpr); aoqi@0: scan(tree.init); aoqi@0: } aoqi@0: aoqi@0: public void visitSkip(JCSkip tree) { aoqi@0: } aoqi@0: aoqi@0: public void visitBlock(JCBlock tree) { aoqi@0: scan(tree.stats); aoqi@0: } aoqi@0: aoqi@0: public void visitDoLoop(JCDoWhileLoop tree) { aoqi@0: scan(tree.body); aoqi@0: scan(tree.cond); aoqi@0: } aoqi@0: aoqi@0: public void visitWhileLoop(JCWhileLoop tree) { aoqi@0: scan(tree.cond); aoqi@0: scan(tree.body); aoqi@0: } aoqi@0: aoqi@0: public void visitForLoop(JCForLoop tree) { aoqi@0: scan(tree.init); aoqi@0: scan(tree.cond); aoqi@0: scan(tree.step); aoqi@0: scan(tree.body); aoqi@0: } aoqi@0: aoqi@0: public void visitForeachLoop(JCEnhancedForLoop tree) { aoqi@0: scan(tree.var); aoqi@0: scan(tree.expr); aoqi@0: scan(tree.body); aoqi@0: } aoqi@0: aoqi@0: public void visitLabelled(JCLabeledStatement tree) { aoqi@0: scan(tree.body); aoqi@0: } aoqi@0: aoqi@0: public void visitSwitch(JCSwitch tree) { aoqi@0: scan(tree.selector); aoqi@0: scan(tree.cases); aoqi@0: } aoqi@0: aoqi@0: public void visitCase(JCCase tree) { aoqi@0: scan(tree.pat); aoqi@0: scan(tree.stats); aoqi@0: } aoqi@0: aoqi@0: public void visitSynchronized(JCSynchronized tree) { aoqi@0: scan(tree.lock); aoqi@0: scan(tree.body); aoqi@0: } aoqi@0: aoqi@0: public void visitTry(JCTry tree) { aoqi@0: scan(tree.resources); aoqi@0: scan(tree.body); aoqi@0: scan(tree.catchers); aoqi@0: scan(tree.finalizer); aoqi@0: } aoqi@0: aoqi@0: public void visitCatch(JCCatch tree) { aoqi@0: scan(tree.param); aoqi@0: scan(tree.body); aoqi@0: } aoqi@0: aoqi@0: public void visitConditional(JCConditional tree) { aoqi@0: scan(tree.cond); aoqi@0: scan(tree.truepart); aoqi@0: scan(tree.falsepart); aoqi@0: } aoqi@0: aoqi@0: public void visitIf(JCIf tree) { aoqi@0: scan(tree.cond); aoqi@0: scan(tree.thenpart); aoqi@0: scan(tree.elsepart); aoqi@0: } aoqi@0: aoqi@0: public void visitExec(JCExpressionStatement tree) { aoqi@0: scan(tree.expr); aoqi@0: } aoqi@0: aoqi@0: public void visitBreak(JCBreak tree) { aoqi@0: } aoqi@0: aoqi@0: public void visitContinue(JCContinue tree) { aoqi@0: } aoqi@0: aoqi@0: public void visitReturn(JCReturn tree) { aoqi@0: scan(tree.expr); aoqi@0: } aoqi@0: aoqi@0: public void visitThrow(JCThrow tree) { aoqi@0: scan(tree.expr); aoqi@0: } aoqi@0: aoqi@0: public void visitAssert(JCAssert tree) { aoqi@0: scan(tree.cond); aoqi@0: scan(tree.detail); aoqi@0: } aoqi@0: aoqi@0: public void visitApply(JCMethodInvocation tree) { aoqi@0: scan(tree.typeargs); aoqi@0: scan(tree.meth); aoqi@0: scan(tree.args); aoqi@0: } aoqi@0: aoqi@0: public void visitNewClass(JCNewClass tree) { aoqi@0: scan(tree.encl); aoqi@0: scan(tree.typeargs); aoqi@0: scan(tree.clazz); aoqi@0: scan(tree.args); aoqi@0: scan(tree.def); aoqi@0: } aoqi@0: aoqi@0: public void visitNewArray(JCNewArray tree) { aoqi@0: scan(tree.annotations); aoqi@0: scan(tree.elemtype); aoqi@0: scan(tree.dims); aoqi@0: for (List annos : tree.dimAnnotations) aoqi@0: scan(annos); aoqi@0: scan(tree.elems); aoqi@0: } aoqi@0: aoqi@0: public void visitLambda(JCLambda tree) { aoqi@0: scan(tree.body); aoqi@0: scan(tree.params); aoqi@0: } aoqi@0: aoqi@0: public void visitParens(JCParens tree) { aoqi@0: scan(tree.expr); aoqi@0: } aoqi@0: aoqi@0: public void visitAssign(JCAssign tree) { aoqi@0: scan(tree.lhs); aoqi@0: scan(tree.rhs); aoqi@0: } aoqi@0: aoqi@0: public void visitAssignop(JCAssignOp tree) { aoqi@0: scan(tree.lhs); aoqi@0: scan(tree.rhs); aoqi@0: } aoqi@0: aoqi@0: public void visitUnary(JCUnary tree) { aoqi@0: scan(tree.arg); aoqi@0: } aoqi@0: aoqi@0: public void visitBinary(JCBinary tree) { aoqi@0: scan(tree.lhs); aoqi@0: scan(tree.rhs); aoqi@0: } aoqi@0: aoqi@0: public void visitTypeCast(JCTypeCast tree) { aoqi@0: scan(tree.clazz); aoqi@0: scan(tree.expr); aoqi@0: } aoqi@0: aoqi@0: public void visitTypeTest(JCInstanceOf tree) { aoqi@0: scan(tree.expr); aoqi@0: scan(tree.clazz); aoqi@0: } aoqi@0: aoqi@0: public void visitIndexed(JCArrayAccess tree) { aoqi@0: scan(tree.indexed); aoqi@0: scan(tree.index); aoqi@0: } aoqi@0: aoqi@0: public void visitSelect(JCFieldAccess tree) { aoqi@0: scan(tree.selected); aoqi@0: } aoqi@0: aoqi@0: public void visitReference(JCMemberReference tree) { aoqi@0: scan(tree.expr); aoqi@0: scan(tree.typeargs); aoqi@0: } aoqi@0: aoqi@0: public void visitIdent(JCIdent tree) { aoqi@0: } aoqi@0: aoqi@0: public void visitLiteral(JCLiteral tree) { aoqi@0: } aoqi@0: aoqi@0: public void visitTypeIdent(JCPrimitiveTypeTree tree) { aoqi@0: } aoqi@0: aoqi@0: public void visitTypeArray(JCArrayTypeTree tree) { aoqi@0: scan(tree.elemtype); aoqi@0: } aoqi@0: aoqi@0: public void visitTypeApply(JCTypeApply tree) { aoqi@0: scan(tree.clazz); aoqi@0: scan(tree.arguments); aoqi@0: } aoqi@0: aoqi@0: public void visitTypeUnion(JCTypeUnion tree) { aoqi@0: scan(tree.alternatives); aoqi@0: } aoqi@0: aoqi@0: public void visitTypeIntersection(JCTypeIntersection tree) { aoqi@0: scan(tree.bounds); aoqi@0: } aoqi@0: aoqi@0: public void visitTypeParameter(JCTypeParameter tree) { aoqi@0: scan(tree.annotations); aoqi@0: scan(tree.bounds); aoqi@0: } aoqi@0: aoqi@0: @Override aoqi@0: public void visitWildcard(JCWildcard tree) { aoqi@0: scan(tree.kind); aoqi@0: if (tree.inner != null) aoqi@0: scan(tree.inner); aoqi@0: } aoqi@0: aoqi@0: @Override aoqi@0: public void visitTypeBoundKind(TypeBoundKind that) { aoqi@0: } aoqi@0: aoqi@0: public void visitModifiers(JCModifiers tree) { aoqi@0: scan(tree.annotations); aoqi@0: } aoqi@0: aoqi@0: public void visitAnnotation(JCAnnotation tree) { aoqi@0: scan(tree.annotationType); aoqi@0: scan(tree.args); aoqi@0: } aoqi@0: aoqi@0: public void visitAnnotatedType(JCAnnotatedType tree) { aoqi@0: scan(tree.annotations); aoqi@0: scan(tree.underlyingType); aoqi@0: } aoqi@0: aoqi@0: public void visitErroneous(JCErroneous tree) { aoqi@0: } aoqi@0: aoqi@0: public void visitLetExpr(LetExpr tree) { aoqi@0: scan(tree.defs); aoqi@0: scan(tree.expr); aoqi@0: } aoqi@0: aoqi@0: public void visitTree(JCTree tree) { aoqi@0: Assert.error(); aoqi@0: } aoqi@0: }