--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-backend/src/main/java/de/intevation/flys/importer/StaFileParser.java	Fri Sep 28 12:14:12 2012 +0200
@@ -0,0 +1,160 @@
+package de.intevation.flys.importer;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.LineNumberReader;
+import java.io.FileInputStream;
+import java.io.InputStreamReader;
+
+import java.math.BigDecimal;
+
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+
+import java.util.HashMap;
+import java.util.ArrayList;
+
+import org.apache.log4j.Logger;
+
+public class StaFileParser
+{
+    private static Logger log = Logger.getLogger(StaFileParser.class);
+
+    public static final String ENCODING = "ISO-8859-1";
+
+    public static final String TYPES =
+        System.getProperty("flys.backend.main.value.types", "QWTD");
+
+    public static final Pattern QWTD_ =
+        Pattern.compile("\\s*([^\\s]+)\\s+([^\\s]+)\\s+([" +
+            Pattern.quote(TYPES) + "]).*");
+
+    public StaFileParser() {
+    }
+
+    public boolean parse(ImportGauge gauge) throws IOException {
+
+        File file = gauge.getStaFile();
+
+        log.info("parsing STA file: " + file);
+        LineNumberReader in = null;
+        try {
+            in =
+                new LineNumberReader(
+                new InputStreamReader(
+                new FileInputStream(file), ENCODING));
+
+            String line = in.readLine();
+
+            if (line == null) {
+                log.warn("STA file is empty.");
+                return false;
+            }
+
+            if (line.length() < 37) {
+                log.warn("first line in STA file is too short.");
+                return false;
+            }
+
+            gauge.setName(line.substring(16, 37).trim());
+
+            String [] values = line.substring(38).trim().split("\\s+", 2);
+
+            if (values.length < 2) {
+                log.warn("Not enough columns for aeo and datum");
+            }
+            try {
+                gauge.setAeo(new BigDecimal(values[0].replace(",", ".")));
+                gauge.setDatum(new BigDecimal(values[1].replace(",", ".")));
+            }
+            catch (NumberFormatException nfe) {
+                log.warn("cannot parse aeo or datum");
+                return false;
+            }
+
+            line = in.readLine();
+
+            if (line == null) {
+                log.warn("STA file has not enough lines");
+                return false;
+            }
+
+            if (line.length() < 36) {
+                log.warn("second line is too short");
+                return false;
+            }
+
+            try {
+                gauge.setStation(
+                    new BigDecimal(line.substring(29, 36).trim()));
+            }
+            catch (NumberFormatException nfe) {
+                log.warn("parsing of the datum of the gauge failed");
+                return false;
+            }
+
+            // overread the next six lines
+            for (int i = 0; i < 6; ++i) {
+                if ((line = in.readLine()) == null) {
+                    log.warn("STA file is too short");
+                    return false;
+                }
+            }
+
+            HashMap<String, ImportMainValueType> types =
+                new HashMap<String, ImportMainValueType>();
+
+            ArrayList<ImportNamedMainValue> namedMainValues =
+                new ArrayList<ImportNamedMainValue>();
+
+            ArrayList<ImportMainValue> mainValues =
+                new ArrayList<ImportMainValue>();
+
+            while ((line = in.readLine()) != null) {
+                Matcher m = QWTD_.matcher(line);
+                if (m.matches()) {
+                    BigDecimal value;
+                    try {
+                        value = new BigDecimal(m.group(2).replace(",", "."));
+                    }
+                    catch (NumberFormatException nfe) {
+                        log.warn("value not parseable in line "
+                            + in.getLineNumber());
+                        continue;
+                    }
+                    String typeString = m.group(3);
+                    log.debug("\t type: " + typeString);
+                    ImportMainValueType type = types.get(typeString);
+                    if (type == null) {
+                        type = new ImportMainValueType(typeString);
+                        types.put(typeString, type);
+                    }
+                    String name = m.group(1);
+                    ImportNamedMainValue namedMainValue =
+                        new ImportNamedMainValue(type, name);
+                    namedMainValues.add(namedMainValue);
+
+                    ImportMainValue mainValue =
+                        new ImportMainValue(gauge, namedMainValue, value);
+
+                    mainValues.add(mainValue);
+                }
+                else {
+                    // TODO: treat as a comment
+                }
+            }
+            gauge.setMainValueTypes(
+                new ArrayList<ImportMainValueType>(types.values()));
+            gauge.setNamedMainValues(namedMainValues);
+            gauge.setMainValues(mainValues);
+        }
+        finally {
+            if (in != null) {
+                in.close();
+            }
+        }
+        log.info("finished parsing STA file: " + file);
+        return true;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :