ingo@2815: package de.intevation.flys.importer.parsers;
ingo@2815: 
ingo@2815: import java.io.File;
ingo@2815: 
ingo@4193: import java.text.DateFormat;
ingo@4193: import java.text.NumberFormat;
ingo@4193: import java.text.ParseException;
ingo@4193: import java.text.SimpleDateFormat;
ingo@2815: import java.util.Calendar;
ingo@2815: import java.util.Date;
ingo@2815: import java.util.Locale;
ingo@2815: 
ingo@2815: import java.io.IOException;
ingo@2815: import java.io.LineNumberReader;
ingo@2815: import java.io.FileInputStream;
ingo@2815: import java.io.InputStreamReader;
ingo@2815: 
ingo@2815: import org.apache.log4j.Logger;
ingo@2815: 
ingo@2815: 
felix@4679: /**
felix@4679:  * Base-Class for prasers for line-based file formats.
felix@4679:  * Calls reset(), then read line by line, calling handleLine() for each,
felix@4679:  * then calls finish().
felix@4679:  */
ingo@2815: public abstract class LineParser {
ingo@2815: 
felix@4679:     /** Private logger. */
ingo@2815:     private static final Logger log = Logger.getLogger(LineParser.class);
ingo@2815: 
ingo@2815:     public static final String ENCODING = "ISO-8859-1";
ingo@2815: 
ingo@2815:     public static final Locale DEFAULT_LOCALE = Locale.GERMAN;
ingo@2815: 
ingo@2815:     public static final String START_META_CHAR = "#";
ingo@2815:     public static final String SEPERATOR_CHAR  = ";";
ingo@2815: 
ingo@2815: 
ingo@4193:     protected abstract void handleLine(int lineNum, String line);
ingo@2815: 
ingo@2815:     protected abstract void reset();
ingo@2815: 
ingo@2815:     protected abstract void finish();
ingo@2815: 
felix@4721:     /** Name of file parsed. */
felix@4721:     protected String fileName;
felix@4721: 
ingo@2815: 
ingo@2815:     /**
ingo@2815:      * This method reads each line of <i>file</i>. At the beginning,
felix@4679:      * <i>reset()</i> is called; afterwards for each line <i>handleLine()</i> is
ingo@2815:      * called; at the end <i>finish</i> is called.
ingo@2815:      *
ingo@2815:      * @param file The file which should be parsed.
ingo@2815:      */
ingo@2815:     public void parse(File file) throws IOException {
ingo@2815:         log.info("Parsing file '" + file + "'");
ingo@2815: 
felix@4721:         fileName = file.getName();
felix@4721: 
ingo@2815:         reset();
ingo@2815: 
ingo@2815:         LineNumberReader in = null;
ingo@2815:         try {
ingo@2815:             in =
ingo@2815:                 new LineNumberReader(
ingo@2815:                 new InputStreamReader(
ingo@2815:                 new FileInputStream(file), ENCODING));
ingo@2815: 
ingo@4193:             String line    = null;
ingo@4193:             int    lineNum = 1;
ingo@2815:             while ((line = in.readLine()) != null) {
ingo@2815:                 if ((line = line.trim()).length() == 0) {
ingo@4193:                     lineNum++;
ingo@2815:                     continue;
ingo@2815:                 }
ingo@2815: 
ingo@4193:                 handleLine(lineNum++, line);
ingo@2815:             }
ingo@2815:         }
ingo@2815:         finally {
ingo@2815:             if (in != null) {
ingo@2815:                 in.close();
ingo@2815:             }
ingo@2815:         }
ingo@2815: 
ingo@2815:         finish();
ingo@2815:     }
ingo@2815: 
ingo@2815: 
felix@4721:     /** Returns the name of the file parsed. */
felix@4721:     protected String getFileName() {
felix@4721:         return fileName;
felix@4721:     }
felix@4721: 
felix@4721: 
ingo@2815:     protected static String stripMetaLine(String line) {
ingo@2815:         String tmp = line.substring(1, line.length());
ingo@2815: 
ingo@2815:         if (tmp.startsWith(" ")) {
ingo@2815:             return tmp.substring(1, tmp.length());
ingo@2815:         }
ingo@2815:         else {
ingo@2815:             return tmp;
ingo@2815:         }
ingo@2815:     }
ingo@2815: 
ingo@4193:     public static double getDouble(String doubleString) throws ParseException {
ingo@4193:         NumberFormat nf = NumberFormat.getInstance(DEFAULT_LOCALE);
ingo@4193:         Number value = nf.parse(doubleString);
ingo@4193: 
ingo@4193:         return value.doubleValue();
ingo@4193:     }
ingo@4193: 
ingo@4193:     public static Date getDate(String dateString) throws ParseException {
ingo@4193:         DateFormat df = SimpleDateFormat.getDateInstance(
ingo@4193:             SimpleDateFormat.MEDIUM, DEFAULT_LOCALE);
ingo@4193: 
ingo@4193:         return df.parse(dateString);
ingo@4193:     }
ingo@4193: 
ingo@2815: 
ingo@2815:     public static Date getDateFromYear(int year) {
ingo@2815:         Calendar cal = Calendar.getInstance();
ingo@2815:         cal.set(year, 0, 1);
ingo@2815: 
ingo@2815:         return cal.getTime();
ingo@2815:     }
ingo@2815: }
ingo@2815: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :