duke@1: /* jjg@1521: * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. duke@1: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. duke@1: * duke@1: * This code is free software; you can redistribute it and/or modify it duke@1: * under the terms of the GNU General Public License version 2 only, as ohair@554: * published by the Free Software Foundation. Oracle designates this duke@1: * particular file as subject to the "Classpath" exception as provided ohair@554: * by Oracle in the LICENSE file that accompanied this code. duke@1: * duke@1: * This code is distributed in the hope that it will be useful, but WITHOUT duke@1: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or duke@1: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License duke@1: * version 2 for more details (a copy is included in the LICENSE file that duke@1: * accompanied this code). duke@1: * duke@1: * You should have received a copy of the GNU General Public License version duke@1: * 2 along with this work; if not, write to the Free Software Foundation, duke@1: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. duke@1: * ohair@554: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA ohair@554: * or visit www.oracle.com if you need additional information or have any ohair@554: * questions. duke@1: */ duke@1: duke@1: package com.sun.tools.javac.tree; duke@1: duke@1: import com.sun.tools.javac.util.*; duke@1: import com.sun.tools.javac.tree.JCTree.*; duke@1: duke@1: /** A subclass of Tree.Visitor, this class defines duke@1: * a general tree scanner pattern. Translation proceeds recursively in duke@1: * left-to-right order down a tree. There is one visitor method in this class duke@1: * for every possible kind of tree node. To obtain a specific duke@1: * scanner, it suffices to override those visitor methods which duke@1: * do some interesting work. The scanner class itself takes care of all duke@1: * navigational aspects. duke@1: * jjg@581: *
This is NOT part of any supported API.
jjg@581: * If you write code that depends on this, you do so at your own risk.
duke@1: * This code and its internal interfaces are subject to change or
duke@1: * deletion without notice.
duke@1: */
duke@1: public class TreeScanner extends Visitor {
duke@1:
duke@1: /** Visitor method: Scan a single node.
duke@1: */
duke@1: public void scan(JCTree tree) {
duke@1: if(tree!=null) tree.accept(this);
duke@1: }
duke@1:
duke@1: /** Visitor method: scan a list of nodes.
duke@1: */
duke@1: public void scan(List extends JCTree> trees) {
duke@1: if (trees != null)
duke@1: for (List extends JCTree> l = trees; l.nonEmpty(); l = l.tail)
duke@1: scan(l.head);
duke@1: }
duke@1:
duke@1:
duke@1: /* ***************************************************************************
duke@1: * Visitor methods
duke@1: ****************************************************************************/
duke@1:
duke@1: public void visitTopLevel(JCCompilationUnit tree) {
duke@1: scan(tree.packageAnnotations);
duke@1: scan(tree.pid);
duke@1: scan(tree.defs);
duke@1: }
duke@1:
duke@1: public void visitImport(JCImport tree) {
duke@1: scan(tree.qualid);
duke@1: }
duke@1:
duke@1: public void visitClassDef(JCClassDecl tree) {
duke@1: scan(tree.mods);
duke@1: scan(tree.typarams);
duke@1: scan(tree.extending);
duke@1: scan(tree.implementing);
duke@1: scan(tree.defs);
duke@1: }
duke@1:
duke@1: public void visitMethodDef(JCMethodDecl tree) {
duke@1: scan(tree.mods);
duke@1: scan(tree.restype);
duke@1: scan(tree.typarams);
jjg@1521: scan(tree.recvparam);
duke@1: scan(tree.params);
duke@1: scan(tree.thrown);
jjg@181: scan(tree.defaultValue);
duke@1: scan(tree.body);
duke@1: }
duke@1:
duke@1: public void visitVarDef(JCVariableDecl tree) {
duke@1: scan(tree.mods);
duke@1: scan(tree.vartype);
jjg@1755: scan(tree.nameexpr);
duke@1: scan(tree.init);
duke@1: }
duke@1:
duke@1: public void visitSkip(JCSkip tree) {
duke@1: }
duke@1:
duke@1: public void visitBlock(JCBlock tree) {
duke@1: scan(tree.stats);
duke@1: }
duke@1:
duke@1: public void visitDoLoop(JCDoWhileLoop tree) {
duke@1: scan(tree.body);
duke@1: scan(tree.cond);
duke@1: }
duke@1:
duke@1: public void visitWhileLoop(JCWhileLoop tree) {
duke@1: scan(tree.cond);
duke@1: scan(tree.body);
duke@1: }
duke@1:
duke@1: public void visitForLoop(JCForLoop tree) {
duke@1: scan(tree.init);
duke@1: scan(tree.cond);
duke@1: scan(tree.step);
duke@1: scan(tree.body);
duke@1: }
duke@1:
duke@1: public void visitForeachLoop(JCEnhancedForLoop tree) {
duke@1: scan(tree.var);
duke@1: scan(tree.expr);
duke@1: scan(tree.body);
duke@1: }
duke@1:
duke@1: public void visitLabelled(JCLabeledStatement tree) {
duke@1: scan(tree.body);
duke@1: }
duke@1:
duke@1: public void visitSwitch(JCSwitch tree) {
duke@1: scan(tree.selector);
duke@1: scan(tree.cases);
duke@1: }
duke@1:
duke@1: public void visitCase(JCCase tree) {
duke@1: scan(tree.pat);
duke@1: scan(tree.stats);
duke@1: }
duke@1:
duke@1: public void visitSynchronized(JCSynchronized tree) {
duke@1: scan(tree.lock);
duke@1: scan(tree.body);
duke@1: }
duke@1:
duke@1: public void visitTry(JCTry tree) {
darcy@609: scan(tree.resources);
duke@1: scan(tree.body);
duke@1: scan(tree.catchers);
duke@1: scan(tree.finalizer);
duke@1: }
duke@1:
duke@1: public void visitCatch(JCCatch tree) {
duke@1: scan(tree.param);
duke@1: scan(tree.body);
duke@1: }
duke@1:
duke@1: public void visitConditional(JCConditional tree) {
duke@1: scan(tree.cond);
duke@1: scan(tree.truepart);
duke@1: scan(tree.falsepart);
duke@1: }
duke@1:
duke@1: public void visitIf(JCIf tree) {
duke@1: scan(tree.cond);
duke@1: scan(tree.thenpart);
duke@1: scan(tree.elsepart);
duke@1: }
duke@1:
duke@1: public void visitExec(JCExpressionStatement tree) {
duke@1: scan(tree.expr);
duke@1: }
duke@1:
duke@1: public void visitBreak(JCBreak tree) {
duke@1: }
duke@1:
duke@1: public void visitContinue(JCContinue tree) {
duke@1: }
duke@1:
duke@1: public void visitReturn(JCReturn tree) {
duke@1: scan(tree.expr);
duke@1: }
duke@1:
duke@1: public void visitThrow(JCThrow tree) {
duke@1: scan(tree.expr);
duke@1: }
duke@1:
duke@1: public void visitAssert(JCAssert tree) {
duke@1: scan(tree.cond);
duke@1: scan(tree.detail);
duke@1: }
duke@1:
duke@1: public void visitApply(JCMethodInvocation tree) {
jjg@489: scan(tree.typeargs);
duke@1: scan(tree.meth);
duke@1: scan(tree.args);
duke@1: }
duke@1:
duke@1: public void visitNewClass(JCNewClass tree) {
duke@1: scan(tree.encl);
jjg@1521: scan(tree.typeargs);
duke@1: scan(tree.clazz);
duke@1: scan(tree.args);
duke@1: scan(tree.def);
duke@1: }
duke@1:
duke@1: public void visitNewArray(JCNewArray tree) {
jjg@1521: scan(tree.annotations);
duke@1: scan(tree.elemtype);
duke@1: scan(tree.dims);
jjg@1521: for (List