package OT;

import java.io.*;
import java.net.*;
import java.util.*;

/**
 * Parse data file into vectors of data.
 * @version 1999-01-03
 * @author Andrea Heiberg, University of Arizona
*/
public class DataFile {
	URL url;

public DataFile(URL url) {
	this.url = url;
} //end constructor

public Vector createVectors() {
	InputStream is = null;
	StreamTokenizer st;
	Vector lines = new Vector();
	Vector rawline = new Vector();
	Double temp;

		try {
			is = url.openStream();
			BufferedInputStream b = new BufferedInputStream(is, 4000);
			
			st = new StreamTokenizer(b);
            st.wordChars('+', '+');
            st.wordChars('-', '-');
            st.wordChars('*', '*');
			st.commentChar('%');
			st.quoteChar('"');
			st.eolIsSignificant(true);
			try {
 				while( st.ttype != StreamTokenizer.TT_EOF ) {
					switch ( st.nextToken() ) {
 	 		  		case StreamTokenizer.TT_EOF: 
 	 		  			break;
 	 		 	  	case StreamTokenizer.TT_WORD: //found a word; read in one raw line
						rawline.addElement(new String(st.sval));
						while( st.ttype != StreamTokenizer.TT_EOF && st.ttype != StreamTokenizer.TT_EOL ) {
							switch ( st.nextToken() ) {
 							case StreamTokenizer.TT_EOF: 
 								break;
 							case StreamTokenizer.TT_EOL: 
 								break;
 		 					case StreamTokenizer.TT_WORD:
								rawline.addElement(new String(st.sval));
								break;
							case StreamTokenizer.TT_NUMBER:
								if (st.nval != 0) {
									Double d = new Double(st.nval); //convert number to string							
									String t = new String(d.toString());
									String s = new String();
									if (t.length()>=3) {
										//java 1.1
										s = t.substring(0,t.length()-2);
									} else {
										//java 1.0
										s = t;
									} //end if
									rawline.addElement(s);
								} //end if
 								break;
 							case '"':
 								rawline.addElement(new String(st.sval));
							default: //ignore everything else
								break;
 							} // end switch
						} //end while
						lines.addElement(rawline.clone()); //add this rawline to the vector of lines
						rawline.removeAllElements();
						break;
					default: //ignore everything else
						break;
 					} // end switch
 				} // end while
 				is.close();
				return lines;
		 	} catch( Exception e) {
				System.out.println("DataFile: " + e);
				return null;
			} //end try
		} catch (Exception e) {
			System.out.println("DataFile: " + e);
			return null;
		} //end try

} //end createVectors

} //end class