/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* ConverterUtils.java
* Copyright (C) 2000 Mark Hall
*
*/
package weka.core.converters;
import java.io.StreamTokenizer;
import java.io.Serializable;
import java.io.IOException;
/**
* Utility routines for the converter package.
*
* @author Mark Hall (mhall@cs.waikato.ac.nz)
* @version $Revision 1.0 $
* @see Serializable
*/
public class ConverterUtils implements Serializable {
/**
* Gets token, skipping empty lines.
*
* @param tokenizer the stream tokenizer
* @exception IOException if reading the next token fails
*/
public static void getFirstToken(StreamTokenizer tokenizer)
throws IOException {
while (tokenizer.nextToken() == StreamTokenizer.TT_EOL){};
if ((tokenizer.ttype == '\'') ||
(tokenizer.ttype == '"')) {
tokenizer.ttype = StreamTokenizer.TT_WORD;
} else if ((tokenizer.ttype == StreamTokenizer.TT_WORD) &&
(tokenizer.sval.equals("?"))) {
tokenizer.ttype = '?';
}
}
/**
* Gets token.
*
* @param tokenizer the stream tokenizer
* @exception IOException if reading the next token fails
*/
public static void getToken(StreamTokenizer tokenizer) throws IOException {
tokenizer.nextToken();
if (tokenizer.ttype== StreamTokenizer.TT_EOL) {
return;
}
if ((tokenizer.ttype == '\'') ||
(tokenizer.ttype == '"')) {
tokenizer.ttype = StreamTokenizer.TT_WORD;
} else if ((tokenizer.ttype == StreamTokenizer.TT_WORD) &&
(tokenizer.sval.equals("?"))) {
tokenizer.ttype = '?';
}
}
/**
* Throws error message with line number and last token read.
*
* @param theMsg the error message to be thrown
* @param tokenizer the stream tokenizer
* @exception IOExcpetion containing the error message
*/
public static void errms(StreamTokenizer tokenizer, String theMsg)
throws IOException {
throw new IOException(theMsg + ", read " + tokenizer.toString());
}
}