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Java > Open Source Codes > org > aspectj > compiler > base > ast > Walker


1 /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2  *
3  * This file is part of the compiler and core tools for the AspectJ(tm)
4  * programming language; see http://aspectj.org
5  *
6  * The contents of this file are subject to the Mozilla Public License
7  * Version 1.1 (the "License"); you may not use this file except in
8  * compliance with the License. You may obtain a copy of the License at
9  * either http://www.mozilla.org/MPL/ or http://aspectj.org/MPL/.
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is AspectJ.
17  *
18  * The Initial Developer of the Original Code is Xerox Corporation. Portions
19  * created by Xerox Corporation are Copyright (C) 1999-2002 Xerox Corporation.
20  * All Rights Reserved.
21  *
22  * Contributor(s):
23  */
24
25 package org.aspectj.compiler.base.ast;
26 import org.aspectj.compiler.base.JavaCompiler;
27 import org.aspectj.compiler.base.CompilerObject;
28 import org.aspectj.compiler.base.InternalCompilerError;
29
30 /**
31   * INSERT EXAMPLE process methods here
32   *
33   *
34   */
35 public abstract class Walker extends CompilerObject {
36
37     public Walker(JavaCompiler compiler) {
38         super(compiler);
39     }
40
41     protected boolean preProcess(ASTObject object) { return true; }
42     protected void postProcess(ASTObject object) { }
43
44     public ASTObject process(ASTObject object) {
45         if (!preProcess(object)) return object;
46         object.walk(this);
47         postProcess(object);
48         return object;
49     }
50 }
51
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