sascha@189: package de.intevation.flys.importer;
sascha@189: 
sascha@189: import java.io.File;
sascha@189: import java.io.IOException;
sascha@189: import java.io.LineNumberReader;
sascha@189: import java.io.FileInputStream;
sascha@189: import java.io.InputStreamReader;
sascha@189: 
sascha@189: import java.math.BigDecimal;
sascha@189: 
sascha@189: import java.util.regex.Pattern;
sascha@189: import java.util.regex.Matcher;
sascha@189: 
sascha@189: import java.util.HashMap;
sascha@189: 
sascha@189: import org.apache.log4j.Logger;
sascha@189: 
sascha@189: public class StaFileParser
sascha@189: {
sascha@189:     private static Logger log = Logger.getLogger(StaFileParser.class);
sascha@189: 
sascha@189:     public static final String ENCODING = "ISO-8859-1";
sascha@189: 
sascha@189:     public static final Pattern QWTD_ =
sascha@189:         Pattern.compile("\\s*([^\\s]+)\\s+([^\\s]+)\\s+([QWTD-]).*");
sascha@189: 
sascha@189:     public StaFileParser() {
sascha@189:     }
sascha@189: 
sascha@189:     public boolean parse(ImportGauge gauge) throws IOException {
sascha@189: 
sascha@189:         File file = gauge.getStaFile();
sascha@189: 
sascha@189:         log.info("parsing STA file: " + file);
sascha@189:         LineNumberReader in = null;
sascha@189:         try {
sascha@189:             in =
sascha@189:                 new LineNumberReader(
sascha@189:                 new InputStreamReader(
sascha@189:                 new FileInputStream(file), ENCODING));
sascha@189: 
sascha@189:             String line = in.readLine();
sascha@189: 
sascha@189:             if (line == null) {
sascha@189:                 log.warn("STA file is empty.");
sascha@189:                 return false;
sascha@189:             }
sascha@189: 
sascha@189:             if (line.length() < 37) {
sascha@189:                 log.warn("first line in STA file is too short.");
sascha@189:                 return false;
sascha@189:             }
sascha@189: 
sascha@189:             gauge.setName(line.substring(16, 37).trim());
sascha@189: 
sascha@189:             String [] values = line.substring(38).trim().split("\\s+", 2);
sascha@189: 
sascha@189:             if (values.length < 2) {
sascha@189:                 log.warn("Not enough columns for aeo and datum");
sascha@189:             }
sascha@189:             try {
sascha@189:                 gauge.setAeo(new BigDecimal(values[0].replace(",", ".")));
sascha@189:                 gauge.setDatum(new BigDecimal(values[1].replace(",", ".")));
sascha@189:             }
sascha@189:             catch (NumberFormatException nfe) {
sascha@189:                 log.warn("cannot parse aeo or datum");
sascha@189:                 return false;
sascha@189:             }
sascha@189: 
sascha@189:             line = in.readLine();
sascha@189: 
sascha@189:             if (line == null) {
sascha@189:                 log.warn("STA file has not enough lines");
sascha@189:                 return false;
sascha@189:             }
sascha@189: 
sascha@189:             if (line.length() < 36) {
sascha@189:                 log.warn("second line is too short");
sascha@189:                 return false;
sascha@189:             }
sascha@189: 
sascha@189:             try {
sascha@192:                 gauge.setStation(
sascha@189:                     new BigDecimal(line.substring(29, 36).trim()));
sascha@189:             }
sascha@189:             catch (NumberFormatException nfe) {
sascha@189:                 log.warn("parsing of the datum of the gauge failed");
sascha@189:                 return false;
sascha@189:             }
sascha@189: 
sascha@189:             // overread the next six lines
sascha@189:             for (int i = 0; i < 6; ++i) {
sascha@189:                 if ((line = in.readLine()) == null) {
sascha@189:                     log.warn("STA file is too short");
sascha@189:                     return false;
sascha@189:                 }
sascha@189:             }
sascha@189: 
sascha@189:             HashMap<String, ImportMainValueType> types =
sascha@189:                 new HashMap<String, ImportMainValueType>();
sascha@189: 
sascha@189:             while ((line = in.readLine()) != null) {
sascha@189:                 Matcher m = QWTD_.matcher(line);
sascha@189:                 if (m.matches()) {
sascha@189:                     BigDecimal value;
sascha@189:                     try {
sascha@189:                         value = new BigDecimal(m.group(2).replace(",", "."));
sascha@189:                     }
sascha@189:                     catch (NumberFormatException nfe) {
sascha@189:                         log.warn("value not parseable in line "
sascha@189:                             + in.getLineNumber());
sascha@189:                         continue;
sascha@189:                     }
sascha@189:                     String typeString = m.group(3);
sascha@189:                     log.debug("\t type: " + typeString);
sascha@189:                     ImportMainValueType type = types.get(typeString);
sascha@189:                     if (type == null) {
sascha@189:                         type = new ImportMainValueType(typeString);
sascha@189:                         types.put(typeString, type);
sascha@189:                     }
sascha@189:                 }
sascha@189:                 else {
sascha@189:                     // TODO: treat as a comment
sascha@189:                 }
sascha@189:             }
sascha@189:         }
sascha@189:         finally {
sascha@189:             if (in != null) {
sascha@189:                 in.close();
sascha@189:             }
sascha@189:         }
sascha@189:         log.info("finished parsing STA file: " + file);
sascha@189:         return true;
sascha@189:     }
sascha@189: }
sascha@189: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :