Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2001, 2010, 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 scanner pattern. Translation proceeds recursively in

  *  left-to-right order down a tree. There is one visitor method in this class

  *  for every possible kind of tree node.  To obtain a specific

  *  scanner, it suffices to override those visitor methods which

  *  do some interesting work. The scanner 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 TreeScanner extends Visitor {

     /** Visitor method: Scan a single node.

      */

     public void scan(JCTree tree) {

         if(tree!=null) tree.accept(this);

     }

     /** Visitor method: scan a list of nodes.

      */

     public void scan(List<? extends JCTree> trees) {

         if (trees != null)

         for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail)

             scan(l.head);

     }

 /* ***************************************************************************

  * Visitor methods

  ****************************************************************************/

     public void visitTopLevel(JCCompilationUnit tree) {

         scan(tree.packageAnnotations);

         scan(tree.pid);

         scan(tree.defs);

     }

     public void visitImport(JCImport tree) {

         scan(tree.qualid);

     }

     public void visitClassDef(JCClassDecl tree) {

         scan(tree.mods);

         scan(tree.typarams);

         scan(tree.extending);

         scan(tree.implementing);

         scan(tree.defs);

     }

     public void visitMethodDef(JCMethodDecl tree) {

         scan(tree.mods);

         scan(tree.restype);

         scan(tree.typarams);

         scan(tree.params);

         scan(tree.receiverAnnotations);

         scan(tree.thrown);

         scan(tree.defaultValue);

         scan(tree.body);

     }

     public void visitVarDef(JCVariableDecl tree) {

         scan(tree.mods);

         scan(tree.vartype);

         scan(tree.init);

     }

     public void visitSkip(JCSkip tree) {

     }

     public void visitBlock(JCBlock tree) {

         scan(tree.stats);

     }

     public void visitDoLoop(JCDoWhileLoop tree) {

         scan(tree.body);

         scan(tree.cond);

     }

     public void visitWhileLoop(JCWhileLoop tree) {

         scan(tree.cond);

         scan(tree.body);

     }

     public void visitForLoop(JCForLoop tree) {

         scan(tree.init);

         scan(tree.cond);

         scan(tree.step);

         scan(tree.body);

     }

     public void visitForeachLoop(JCEnhancedForLoop tree) {

         scan(tree.var);

         scan(tree.expr);

         scan(tree.body);

     }

     public void visitLabelled(JCLabeledStatement tree) {

         scan(tree.body);

     }

     public void visitSwitch(JCSwitch tree) {

         scan(tree.selector);

         scan(tree.cases);

     }

     public void visitCase(JCCase tree) {

         scan(tree.pat);

         scan(tree.stats);

     }

     public void visitSynchronized(JCSynchronized tree) {

         scan(tree.lock);

         scan(tree.body);

     }

     public void visitTry(JCTry tree) {

         scan(tree.resources);

         scan(tree.body);

         scan(tree.catchers);

         scan(tree.finalizer);

     }

     public void visitCatch(JCCatch tree) {

         scan(tree.param);

         scan(tree.body);

     }

     public void visitConditional(JCConditional tree) {

         scan(tree.cond);

         scan(tree.truepart);

         scan(tree.falsepart);

     }

     public void visitIf(JCIf tree) {

         scan(tree.cond);

         scan(tree.thenpart);

         scan(tree.elsepart);

     }

     public void visitExec(JCExpressionStatement tree) {

         scan(tree.expr);

     }

     public void visitBreak(JCBreak tree) {

     }

     public void visitContinue(JCContinue tree) {

     }

     public void visitReturn(JCReturn tree) {

         scan(tree.expr);

     }

     public void visitThrow(JCThrow tree) {

         scan(tree.expr);

     }

     public void visitAssert(JCAssert tree) {

         scan(tree.cond);

         scan(tree.detail);

     }

     public void visitApply(JCMethodInvocation tree) {

         scan(tree.typeargs);

         scan(tree.meth);

         scan(tree.args);

     }

     public void visitNewClass(JCNewClass tree) {

         scan(tree.encl);

         scan(tree.clazz);

         scan(tree.typeargs);

         scan(tree.args);

         scan(tree.def);

     }

     public void visitNewArray(JCNewArray tree) {

         scan(tree.annotations);

         scan(tree.elemtype);

         scan(tree.dims);

         for (List<JCTypeAnnotation> annos : tree.dimAnnotations)

             scan(annos);

         scan(tree.elems);

     }

     public void visitParens(JCParens tree) {

         scan(tree.expr);

     }

     public void visitAssign(JCAssign tree) {

         scan(tree.lhs);

         scan(tree.rhs);

     }

     public void visitAssignop(JCAssignOp tree) {

         scan(tree.lhs);

         scan(tree.rhs);

     }

     public void visitUnary(JCUnary tree) {

         scan(tree.arg);

     }

     public void visitBinary(JCBinary tree) {

         scan(tree.lhs);

         scan(tree.rhs);

     }

     public void visitTypeCast(JCTypeCast tree) {

         scan(tree.clazz);

         scan(tree.expr);

     }

     public void visitTypeTest(JCInstanceOf tree) {

         scan(tree.expr);

         scan(tree.clazz);

     }

     public void visitIndexed(JCArrayAccess tree) {

         scan(tree.indexed);

         scan(tree.index);

     }

     public void visitSelect(JCFieldAccess tree) {

         scan(tree.selected);

     }

     public void visitIdent(JCIdent tree) {

     }

     public void visitLiteral(JCLiteral tree) {

     }

     public void visitTypeIdent(JCPrimitiveTypeTree tree) {

     }

     public void visitTypeArray(JCArrayTypeTree tree) {

         scan(tree.elemtype);

     }

     public void visitTypeApply(JCTypeApply tree) {

         scan(tree.clazz);

         scan(tree.arguments);

     }

     public void visitTypeDisjunction(JCTypeDisjunction tree) {

         scan(tree.alternatives);

     }

     public void visitTypeParameter(JCTypeParameter tree) {

         scan(tree.annotations);

         scan(tree.bounds);

     }

     @Override

     public void visitWildcard(JCWildcard tree) {

         scan(tree.kind);

         if (tree.inner != null)

             scan(tree.inner);

     }

     @Override

     public void visitTypeBoundKind(TypeBoundKind that) {

     }

     public void visitModifiers(JCModifiers tree) {

         scan(tree.annotations);

     }

     public void visitAnnotation(JCAnnotation tree) {

         scan(tree.annotationType);

         scan(tree.args);

     }

     public void visitAnnotatedType(JCAnnotatedType tree) {

         scan(tree.annotations);

         scan(tree.underlyingType);

     }

     public void visitErroneous(JCErroneous tree) {

     }

     public void visitLetExpr(LetExpr tree) {

         scan(tree.defs);

         scan(tree.expr);

     }

     public void visitTree(JCTree tree) {

         assert false;

     }

 }