TokenLineColumnNumberExtractor.java Source File

00001 package edu.ksu.cis.bandera.jjjc.codegenerator;
00002 
00003 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
00004  * Bandera, a Java(TM) analysis and transformation toolkit           *
00005  * Copyright (C) 2002   Robby (robby@cis.ksu.edu)                    *
00006  * All rights reserved.                                              *
00007  *                                                                   *
00008  * This work was done as a project in the SAnToS Laboratory,         *
00009  * Department of Computing and Information Sciences, Kansas State    *
00010  * University, USA (http://www.cis.ksu.edu/santos).                  *
00011  * It is understood that any modification not identified as such is  *
00012  * not covered by the preceding statement.                           *
00013  *                                                                   *
00014  * This work is free software; you can redistribute it and/or        *
00015  * modify it under the terms of the GNU Library General Public       *
00016  * License as published by the Free Software Foundation; either      *
00017  * version 2 of the License, or (at your option) any later version.  *
00018  *                                                                   *
00019  * This work is distributed in the hope that it will be useful,      *
00020  * but WITHOUT ANY WARRANTY; without even the implied warranty of    *
00021  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU *
00022  * Library General Public License for more details.                  *
00023  *                                                                   *
00024  * You should have received a copy of the GNU Library General Public *
00025  * License along with this toolkit; if not, write to the             *
00026  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,      *
00027  * Boston, MA  02111-1307, USA.                                      *
00028  *                                                                   *
00029  * Java is a trademark of Sun Microsystems, Inc.                     *
00030  *                                                                   *
00031  * To submit a bug report, send a comment, or get the latest news on *
00032  * this project and other SAnToS projects, please visit the web-site *
00033  *                http://www.cis.ksu.edu/santos                      *
00034  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
00035 import java.util.*;
00036 import edu.ksu.cis.bandera.jjjc.node.*;
00037 import edu.ksu.cis.bandera.jjjc.analysis.*;
00038 class TokenLineColumnNumberExtractor {
00039     private static  DepthFirstAdapter fte = new DepthFirstAdapter() {
00040         public void defaultCase(Node node) {
00041             if (node instanceof Token) {
00042                 Token t = (Token) node;
00043                 if (t.getLine() == 0 && t.getPos() == 0) return;
00044                 throw new RuntimeException(t.getLine() + " " + t.getPos());
00045             }
00046         }
00047     };
00048     private static ReversedDepthFirstAdapter lte = new ReversedDepthFirstAdapter() {
00049         public void defaultCase(Node node) {
00050             if (node instanceof Token) {
00051                 Token t = (Token) node;
00052                 if (t.getLine() == 0 && t.getPos() == 0) return;
00053                 throw new RuntimeException(t.getLine() + " " + t.getPos());
00054             }
00055         }
00056     };
00057     private static TokenLineColumnNumberExtractor tlcne = new TokenLineColumnNumberExtractor();
00058 /**
00059  * 
00060  */
00061 private TokenLineColumnNumberExtractor() {}
00062 /**
00063  * 
00064  * @return edu.ksu.cis.bandera.jjjc.codegenerator.LineColumn
00065  * @param node edu.ksu.cis.bandera.jjjc.node.Node
00066  */
00067 public static LineColumn getLineColumn(Node node) {
00068     int firstLine = 0, firstColumn = 0, lastLine = 0, lastColumn = 0;
00069     try {
00070         node.apply(fte);
00071     } catch (RuntimeException re) {
00072         StringTokenizer t = new StringTokenizer(re.getMessage());
00073         firstLine = Integer.parseInt(t.nextToken());
00074         firstColumn = Integer.parseInt(t.nextToken());
00075     }
00076     try {
00077         node.apply(lte);
00078     } catch (RuntimeException re) {
00079         StringTokenizer t = new StringTokenizer(re.getMessage());
00080         lastLine = Integer.parseInt(t.nextToken());
00081         lastColumn = Integer.parseInt(t.nextToken());
00082     }
00083     return new LineColumn(firstLine, firstColumn, lastLine, lastColumn);
00084 }
00085 }