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package nl.wldelft.fews.system.plugin.dataImporttimeseriesparsers;
 
 
import nl.wldelft.util.TextUtils;
import nl.wldelft.util.TimeZoneUtils;
import nl.wldelft.util.io.LineReader;
import nl.wldelft.util.io.TextParser;
import nl.wldelft.util.timeseries.DefaultTimeSeriesHeader;
import nl.wldelft.util.timeseries.TimeSeriesContentHandler;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.LogManager;

import java.io.IOException;
import java.util.TimeZone;
 
import org.apache.log4j.Logger;
 
public class WiskiTimeSeriesParser implements TextParser<TimeSeriesContentHandler> {
 
    private static final Logger log = Logger.getLogger(WiskiTimeSeriesParser.class);
 
    private LineReader reader = null;
    private TimeSeriesContentHandler contentHandler = null;
    private DefaultTimeSeriesHeader header = new DefaultTimeSeriesHeader();
    private TimeZone headerTimeZone; //timeZone read from the file header
    private String virtualFileName;
 
    @Override
    public void parse(LineReader reader, String virtualFileName, TimeSeriesContentHandler contentHandler) throws Exception {
        this.virtualFileName = virtualFileName;
        this.contentHandler = contentHandler;
        this.contentHandler.addMissingValue(-777.0f);
 
        this.reader = reader;
        this.reader.setCommentLinePrefix('?');
        this.reader.setSkipEmptyLines(true);
 
        this.header.clear
/**
 * This parser supports two formats:  WISKI7 and the previous format of WISKI (number unknown)
 * Recognizing the formats:
 * a) If the header contains the keyword TSPATH, then it is WISKI7.
 * The event rows wil be parsed according to the format as specified with the keyword LAYOUT. If no  LAYOUT specified, the defaults wil be used.
 * b) otherwise it is older Wiski format.
 * The event rows wil be parsed as follows: the first column is timestamp, the second column is value
 */
public class WiskiTimeSeriesParser implements TextParser<TimeSeriesContentHandler> {

    private static final Logger log = LogManager.getLogger();
    private static final char remarkSepar = '"';

    private boolean anyHeaderInvalid = false;
    private LineReader reader = null;
    private TimeSeriesContentHandler contentHandler = null;
    private DefaultTimeSeriesHeader header = new DefaultTimeSeriesHeader();
    private TimeZone headerTimeZone; //timeZone read this.headerTimeZonefrom =the null;
file header
    private    reader.mark(500)String virtualFileName;

    //Fields <name>Index specify the String[]column bufferof =the new String[2];
        for (String line; (line = reader.readLine()) != null; reader.mark(500)) {
            line = line.trim()timestamp, value, status ,....  in the event row.
    //With  the keyword LAYOUT an another sequence of the data can be specified.
    private int timestampIndex;
    private int valueIndex;
    private  if (line.equals("ENDOFFILE")) returnint statusIndex;
 
   private int interpolation_typeIndex;
    private int remarkIndex;

 if (line.charAt(0) == '#') {
    private boolean defaultWiski7LayoutUsed = true;

    @Override
    public void parse(LineReader reader,  reader.reset();
     String virtualFileName, TimeSeriesContentHandler contentHandler) throws Exception {
        this.virtualFileName =  parseHeader()virtualFileName;
        this.contentHandler        continue= contentHandler;
         this.contentHandler.addMissingValue(-777.0f);

   }
  
   this.reader = reader;
       if (this.headerreader.getLocationIdsetCommentLinePrefix('?') == null &&;
        this.headerreader.getParameterIdsetSkipEmptyLines(true);

 == null)
      this.header.clear();
        this.headerTimeZone = null;
 throw new Exception("Not a valid wiski file, REXCHANGE, CNAME, SANR tags are all missing in the file header");
 
     //Initialized the columns to read data from the event rows.
        initializeWiski7RowLayout();

        if (this.contentHandler.isCurrentTimeSeriesHeaderForAllTimesRejected()) continueanyHeaderInvalid = false;
 
       boolean headerValid = false;

   TextUtils.split(line, ' ', buffer     reader.mark(500);
        String[] buffer = new  if (this.headerTimeZoneString[5];
        for (String line; (line = reader.readLine()) != null; reader.mark(500)) {
            line =   contentHandlerline.setTime(this.headerTimeZone, "yyyyMMddHHmmss", buffer[0]trim();
            } else {if (line.equals("ENDOFFILE")) return;

                contentHandler.setTime(contentHandler.getDefaultTimeZone(), "yyyyMMddHHmmss", buffer[0]);if (line.charAt(0) == '#') {
            }    reader.reset();
            contentHandler.setValue('.', buffer[1]    headerValid = parseHeader();
            contentHandler.applyCurrentFields()    continue;
        }
    }
 
    /**
     * Read metadata from the #-records. Metadata block is followed by the timeseries-records
if (!headerValid) {
             * but the anyHeaderInvalid timeseries-records may be also omitted. In this case the Metadata block MUST start
= true;
                *continue;
 with a record that begins with ## !
     * Empty records wil be ignored.}

     * <p/>
     * The meaning of the keys is:if (this.header.getLocationId() == null && this.header.getParameterId() == null)
     * TZ : time zone. TZ are UTC0 and UTC+/-x (e.g. UTC+1 or UTC-2).
     * TSPATH :  /site id/location id/parameter id/ts shortname
 throw new Exception("Not a valid wiski file, REXCHANGE, CNAME, SANR tags are all missing in the file header");

       *   example   TSPATH/160/160_1/WATHTE/cmd.pif (this.contentHandler.isCurrentTimeSeriesHeaderForAllTimesRejected()) continue;

     * only location id and parameter id is//If parseddefault andlayout used
, the remarks (if any) *must SANRbe :specified locationlast id.in Usedthe onlyline ifand notstart specified with  TSPATH"-token
     * CNAME: parameter id. Used only if notString specifiedremarksDefaultLayout;
 with  TSPATH
     * CUNIT: unit
  if (this.defaultWiski7LayoutUsed  * RINVAL: missing value&& line.indexOf(remarkSepar) != -1) {
     * REXCHANGE: location-parameter. Wil be used only if the metadata block does//extract notremarks containfirst keys(if TSPATHany), SANRso orthat CNAME.
they cannot be confused with *the Thestatus string specified by keyword REXCHANGE represents location Id and also parameter-id (so locations Id and parameter Id equals)
     *or interp.type
                String leftStr = TextUtils.leftFrom(line, remarkSepar);
     * @throws IOException if the header format is incorrect
   remarksDefaultLayout  */
= TextUtils.rightFrom(line, remarkSepar).replace(remarkSepar, ' ');
       private void parseHeader() throws IOException {
        this.header.clear();
        this.headerTimeZone = null;
 
         TextUtils.split(leftStr, ' ', buffer);
            } else {
                remarksDefaultLayout = null;
                TextUtils.split(line, ' ', buffer);
            }

            if (this.headerTimeZone != null) {
                contentHandler.setTime(this.headerTimeZone, "yyyyMMddHHmmss", buffer[this.timestampIndex]);
            } else {
                contentHandler.setTime(contentHandler.getDefaultTimeZone(), "yyyyMMddHHmmss", buffer[this.timestampIndex]);
            }

            int flag = getFlag(this.defaultWiski7LayoutUsed, this.statusIndex, this.interpolation_typeIndex, buffer, line);
            if (flag != Integer.MIN_VALUE) {
                contentHandler.setFlag(flag);
            }

            contentHandler.setValue('.', buffer[this.valueIndex]);

            contentHandler.setComment(null); //reset
            if (remarksDefaultLayout != null) {
                if (!remarksDefaultLayout.isEmpty()) contentHandler.setComment(remarksDefaultLayout);
            } else {
                if (this.remarkIndex != -1) {
                    String remark = buffer[this.remarkIndex].replace(remarkSepar, ' ');
                    if (!remark.isEmpty()) contentHandler.setComment(remark);

                }
            }
            contentHandler.applyCurrentFields();

        }
        if (anyHeaderInvalid) throw new IOException(" the file has one or more invalid headers"); // throw exception since the file should be marked as not fully successful
    }

    /**
     * Read metadata from the #-records. Metadata block is followed by the timeseries-records
     * but the  timeseries-records may be also omitted. In this case the Metadata block MUST start
     * with a record that begins with ## !
     * Empty records wil be ignored.
     * <p/>
     * The meaning of the keys is:
     * TZ : time zone. TZ are UTC0 and UTC+/-x (e.g. UTC+1 or UTC-2).
     * TSPATH :  /site id/location id/parameter id/ts shortname
     * example   TSPATH/160/160_1/WATHTE/cmd.p
     * only location id and parameter id is parsed and used
     * SANR : location id. Used only if not specified with  TSPATH
     * CNAME: parameter id. Used only if not specified with  TSPATH
     * CUNIT: unit
     * RINVAL: missing value
     * REXCHANGE: location-parameter. Wil be used only if the metadata block does not contain keys TSPATH, SANR or CNAME.
     * The string specified by keyword REXCHANGE represents location Id and also parameter-id (so locations Id and parameter Id equals)
     *
     * @throws IOException if the header format is incorrect
     */
    private boolean parseHeader() throws IOException {
        this.header.clear();
        this.headerTimeZone = null;

        //Initialized the columns to read data from the event rows.
        initializeWiski7RowLayout();

        String tspathPar = null;
        String tspathQual = null;
        String tspathLoc = null;
        String fallbackParLoc = null;

        for (String line; (line = this.reader.readLine()) != null; reader.mark(500)) {
            line = line.trim();
            if (line.charAt(0) != '#') {
                reader.reset();
                break;
            }

            String layoutString = parseKeyValue("LAYOUT", line);
            if (layoutString != null) {
                defaultWiski7LayoutUsed = false;
                //Obtain information how to parse event rows
                parseEventRowLayout(layoutString.trim());
            }

            String tzString = parseKeyValue("|TZ", line);
            if (tzString != null) {
                this.headerTimeZone = parseTimeZone(tzString, this.virtualFileName, this.contentHandler.getDefaultTimeZone().getID());
            }

            //Parse location id and parameter specified with keyword TSPATH
            //format: TSPATH/<site id>/<station id>/<parameter shortname>/<ts shortname>
            //example: TSPATH/160/160_1/WATHTE/cmd.p  (contains always all these 4 elements )
            //<ts shortname> is read as qualifier
            String tspath = parseKeyValue("TSPATH", line);
            int index = line.contains("TSPATH/") ? 1 : 0;
            if (tspath != null && !tspath.trim().equals("/")) {
                //TSPATH available and not empty
                String[] buffer = TextUtils.split(tspath, '/');
                if (buffer.length != 4 + index || buffer[1 + index].length() < 1 || buffer[2+index].length() < 1) {
                    throw new IOException("Not a valid wiski file, TSPATH has a incorrect format: " + tspath +
                            "   expected: TSPATH/<site id>/<station id>/<parameter shortname>/<ts shortname>");
                }
                tspathLoc = buffer[1+index];
                tspathPar = buffer[2+index];
                tspathQual = buffer[3+index].replace('.', '_'); // dots are not allowed in fews as internal qualifiers, replace dots with underscores
            }
            String locationId = parseKeyValue("SANR", line);
            if (locationId != null && !locationId.isBlank()) header.setLocationId(locationId);
            if (log.isDebugEnabled() && locationId != null && locationId.isBlank()) {
                log.debug("Location id is blank, skipping current line.");
            }
            String parameterId = parseKeyValue("CNAME", line);
            if (parameterId != null && !parameterId.isBlank()) header.setParameterId(parameterId);
            if (log.isDebugEnabled() && parameterId != null && parameterId.isBlank()) {
                log.debug("Parameter id is blank, skipping current line.");
            }
            String unit = parseKeyValue("CUNIT", line);
            if (unit != null) header.setUnit(unit);
            String missingValue = parseKeyValue("RINVAL", line);
            if (missingValue != null) contentHandler.addMissingValue(missingValue);
            String parLoc = parseKeyValue("REXCHANGE", line);
            if (parLoc != null) fallbackParLoc = parLoc;

        }

        if (tspathPar != null && tspathLoc != null) {
            //If par id, qualifier id and loc are specified with  TSPATH, use them , even if the keywords SANR and SNAME are also present in the file
            header.setParameterId(tspathPar);
            header.setQualifierIds(tspathQual);
            header.setLocationId(tspathLoc);
        } else {
            //The header has an OLD format (no WISKI7), if any LAYOUT specifid, it wil be ignored !
            //Re-initialized the columns to read data from the event rows (no flags reading !).
            initializeRowLayout();
            if (header.getParameterId() == null || header.getLocationId() == null) {
                if (fallbackParLoc != null && !fallbackParLoc.isEmpty()) {
                    header.setParameterId(fallbackParLoc);
                    header.setLocationId(fallbackParLoc);
                } else {
                    log.warn(this.reader.getFileAndLineNumber()+"   parameter/location is missing next to the keyword REXCHANGE");
                    return false;
                }
            }
        }
        if (log.isDebugEnabled()) log.debug("Reading data for " + header.toString());
        if (header.getLocationId() != null || header.getParameterId() != null) contentHandler.setTimeSeriesHeader(header);
        return true;
    }


    private void initializeWiski7RowLayout() {
        defaultWiski7LayoutUsed = true;

        timestampIndex = 0;           //  timestamp wil be read from column 1 by default
        valueIndex = 1;               //  value wil be read from column 2 by default
        statusIndex = 2;             //   status wil be read from column 3 by default
        interpolation_typeIndex = 3; //   interpolation_type wil be read from column 4 by default
        remarkIndex = 4;             //   remark wil be read from column 5 by default
    }

    private void initializeRowLayout() {
        defaultWiski7LayoutUsed = false;

        timestampIndex = 0;           //  timestamp is always read from column 1
        valueIndex = 1;               //  value is always read from column 2
        statusIndex = -1;             //   status  NOT read
        interpolation_typeIndex = -1; //   interpolation_type NOT read
        remarkIndex = -1;             //   remark NOT read
    }

    //Some examples of the buffer, that is parsed from the header line LAYOUT:
    //(timestamp,value)
    //(timestamp,value,status,interpolationm_type,remark)
    private void parseEventRowLayout(String bufferIn) throws IOException {

        //Check the passed  buffer, remove brackets from buffer
        String buffer = null;
        if (bufferIn.length() > 5) {
            if (bufferIn.charAt(0) == '(' && bufferIn.charAt(bufferIn.length() - 1) == ')') {
                buffer = bufferIn.substring(1, bufferIn.length() - 1).trim();
            }
        }
        if (buffer == null)
            throw new IOException("String specified with the LAYOUT-keyword has wrong format:" + bufferIn);

        String[] keywords = new String[5]; //max. 5 keywords expected , as specified in the second example
        TextUtils.split(buffer, ',', keywords);

        //-1 = data not specified in the file  (accorning to the header keyword LAYOUT)
        timestampIndex = -1;
        valueIndex = -1;
        statusIndex = -1;
        interpolation_typeIndex = -1;
        remarkIndex = -1;

        for (int i = 0; i < 5; i++) {

            String keyword = keywords[i].trim();

            if (keyword.isEmpty())
                continue; //not all keywords must be specified, however at least 2:  timestamp and value

            if (keyword.equals("timestamp")) {
                if (timestampIndex != -1)
                    throw new IOException("Keyword '" + keyword + "' specified more than once in the header line LAYOUT");
                timestampIndex = i;
            } else if (keyword.equals("value")) {
                if (valueIndex != -1)
                    throw new IOException("Keyword '" + keyword + "' specified more than once in the header line LAYOUT");
                valueIndex = i;
            } else if (keyword.equals("status") || keyword.equals("primary_status")) {
                if (statusIndex != -1)
                    throw new IOException("Keyword '" + keyword + "' specified more than once in the header line LAYOUT");
                statusIndex = i;
            } else if (keyword.equals("interpolation_type")) {
                if (interpolation_typeIndex != -1)
                    throw new IOException("Keyword '" + keyword + "' specified more than once in the header line LAYOUT");
                interpolation_typeIndex = i;
            } else if (keyword.equals("remark")) {
                if (remarkIndex != -1)
                    throw new IOException("Keyword '" + keyword + "' specified more than once in the header line LAYOUT");
                remarkIndex = i;
            } else if (isKnownKeyword(keyword)) {
                // Ignore
            } else {
                throw new IOException("Wrong keyword '" + keyword + "' specified in the header line #LAYOUT ");
            }
        }

        if (timestampIndex == -1 || valueIndex == -1) {
            throw new IOException("Keywords timestamp and/or value are not specified in the header line LAYOUT !");
        }

    }

    private static boolean isKnownKeyword(String key) {
        if (key.equals("timestampoccurence")) return true;
        if (key.equals("forecast")) return true;
        if (key.equals("member")) return true;
        if (key.equals("dispatch_info")) return true;
        return false;
    }

    //Returns value or null if the key not found in the buffer
    private static String parseKeyValue(String key, String buffer) {
        int keyPos = buffer.indexOf(key);
        if (keyPos == -1) return null;
        int endValuePos = buffer.indexOf(";*;", keyPos + key.length());
        if (endValuePos == -1) endValuePos = buffer.indexOf("|*|", keyPos + key.length());
        if (endValuePos == -1) return null;
        return buffer.substring(keyPos + key.length(), endValuePos);
    }

    private static TimeZone parseTimeZone(String buffer, String fileName, String defaultTimeZone) throws IOException {
        if (buffer.equals("MEZ")) return TimeZone.getTimeZone("GMT+1");
        if (buffer.equals("MESZ")) return TimeZone.getTimeZone("CET");
        if (buffer.equals("CET")) return TimeZone.getTimeZone("CET");
        if (buffer.equals("CEST")) return TimeZone.getTimeZone("GMT+2");
        if (buffer.equals("Europe/Amsterdam") || buffer.equals("Europe/Berlin") || buffer.equals("Europe/Brussels") || buffer.equals("Europe/Luxembourg") ||
                buffer.equals("Europe/Madrid") || buffer.equals("Europe/Paris") || buffer.equals("Europe/Rome") || buffer.equals("Europe/Vienna") || buffer.equals("Europe/Zurich")) {
          String tspathPar = nullreturn TimeZone.getTimeZone("CET");
        String tspathQual = null;
        String tspathLoc = null;}

        String fallbackParLocstrOffset = nullgetUtcGmtOffset(buffer);
 
       if for (String line; (line = this.reader.readLine()) != null; reader.mark(500)(strOffset == null) {
            line = line.trim();
            if (line.charAt(0) != '#') {
                reader.reset(log.warn(fileName + ": invalid timezone specified with TZ keyword - " + buffer + " , " + defaultTimeZone + " will be used.");
            return    breaknull;
            }
 
       TimeZone timeZone;
    String  tzString = parseKeyValue("TZ", line); try {
            ifdouble (tzStringoffset != null) {Double.parseDouble(strOffset);
                this.headerTimeZone = parseTimeZone(tzString, this.virtualFileName, this.contentHandler.getDefaultTimeZone().getID())timeZone = TimeZoneUtils.createTimeZoneFromDouble(offset);
        } catch (NumberFormatException e) }
 {
            //Parsethrow location id and parameternew IOException("Invalid timeZone specified with TZ keyword TSPATH:" + buffer, e);
        }
    //format: TSPATH/<site id>/<station id>/<parameter shortname>/<ts shortname>    return timeZone;
    }

    private static String getUtcGmtOffset(String buffer) {
        if ((buffer.startsWith("UTC") ||  //example: TSPATH/160/160_1/WATHTE/cmd.p  (contains always all these 4 elements )
buffer.startsWith("GMT")) && buffer.length() >= 4) {
            return buffer.substring(3);
    //<ts shortname> is read as qualifier}
        if ((buffer.startsWith("Etc/UTC") ||  String tspath = parseKeyValue("TSPATH", line);buffer.startsWith("Etc/GMT")) && buffer.length() >= 8) {
            ifreturn (tspath != null) {
buffer.substring(7);
        }
         String[] buffer = TextUtils.split(tspath, '/');return null;
    }

    //Parse flags from the line.
    //First flag is 'status', if (buffer.length != 5 || buffer[2].length() < 1 || buffer[3].length() < 1) {
                    throw new IOException("Not a valid wiski file, TSPATH has a incorrect format: " + tspath +
                            "   expected: TSPATH/<site id>/<station id>/<parameter shortname>/<ts shortname>");
                }
        the second one is interpolation type.
    //Two optional flags are composed to one flag as follows: flag1*1000+flag2
    //Flag2 must be between 0 and 999
    //Line examples and the composed flags:
    //20100227000709 3.0 200 103   -> 200103
    //20100227000709 3.0 0 103     -> 103
    //20100227000709 3.0 200 0     -> 200000
    //20100227000709 3.0 200       -> 200000
    private static int getFlag(boolean defaultLayout, int statusColumnIndex, int interpTypeColumnIndex, String[] buffer, String fileLine) {

        tspathLocint statusFlag = buffer[2];
       Integer.MIN_VALUE;

        if tspathPar(statusColumnIndex != buffer[3];-1) {
            String    tspathQualstatus = buffer[4].replace('.', '_'); // dots are not allowed in fews as internal qualifiers, replace dots with underscoresstatusColumnIndex];

            if (status.isEmpty()) {
            }
    if (!defaultLayout) {
      String locationId = parseKeyValue("SANR", line);
          //status not ifspecified (locationIdaccording !=to null)the header.setLocationId(locationId);, give message
            String      parameterId = parseKeyValuelog.error("CNAME", lineStatus expected, but is ommited in the line: " + fileLine);
            if (parameterId != null) header.setParameterId(parameterId); }
            String  unit = parseKeyValue("CUNIT", line);
     return Integer.MIN_VALUE; //no status specified in defaultLayout
        if (unit != null) header.setUnit(unit); }
            StringstatusFlag missingValue = parseKeyValue("RINVAL", lineparseIntFlag(status);
            if (missingValuestatusFlag !== nullInteger.MIN_VALUE) contentHandler.addMissingValue(missingValue);
{
                log.error("Wrong status Stringspecified parLocin =the parseKeyValue("REXCHANGE", lineline:" + fileLine);
            if (parLoc != null) fallbackParLoc = parLoc;
 
        }
 
        if (tspathPar != null && tspathLoc != null) {
   return Integer.MIN_VALUE;   //flag cannot be converted to integer, so no flags wil be set (for this timestep)
            }
         //If par id, qualifier id and loc are specified with  TSPATH, use them , even if the keywords SANR and SNAME are also present in the file}

        if (statusFlag != Integer.MIN_VALUE) statusFlag *= 1000;

        int interpTypeFlag = Integer.MIN_VALUE;

        if (interpTypeColumnIndex !=  header.setParameterId(tspathPar);
-1) {
            String  header.setQualifierIds(tspathQual)interpType = buffer[interpTypeColumnIndex];
            header.setLocationId(tspathLoc);if (interpType.isEmpty()) {
        } else if (header.getParameterId() == null || header.getLocationId() == null if (!defaultLayout) {
            header.setParameterId(fallbackParLoc);
        //Interpolation type not  header.setLocationId(fallbackParLoc);
        }specified according to the header , give message
        contentHandler.setTimeSeriesHeader(header);
     }
 
    //Returns value or null if the key not found log.error("Interpolation type expected, but is ommited in the buffer
  line: " + fileLine);
  private static String parseKeyValue(String key, String buffer) {
       }
 int keyPos = buffer.indexOf(key);
        if (keyPos == -1) return nullstatusFlag;
   
     int endValuePos = buffer.indexOf(";*;", keyPos + key.length());
   }
     if (endValuePos == -1) endValuePos = buffer.indexOf("|*|", keyPos + key.length()) interpTypeFlag = parseIntFlag(interpType);
            if (endValuePosinterpTypeFlag == -1) return null;
        return buffer.substring(keyPos + key.length(), endValuePos);
Integer.MIN_VALUE || interpTypeFlag < 0 || interpTypeFlag > 999) {
         }
 
    //Parse time zonelog. Note: UTC always expected , since no other code wil occur according to the Wiski 7 format
    //Allowed formats are: UTC0 and UTC+/-x (e.g. UTC+1 or UTC-2).
    private static TimeZone parseTimeZone(String buffer, String fileName, String defaultTimeZone) throws IOException {
 error("Wrong interpolation type specified, it should be between 0 and 999. Line: " + fileLine);
                return Integer.MIN_VALUE;
            }
        }

        if (buffer.indexOf("UTC") != 0 || buffer.length() < 4) {
statusFlag == Integer.MIN_VALUE) {
            return interpTypeFlag;   log.warn(fileName + ": invalid timezone specified with TZ keyword - " + buffer + " , " + defaultTimeZone + " wil be used.");//only the interpolation type  flag specified
        }
        if (interpTypeFlag == Integer.MIN_VALUE) {
            return nullstatusFlag;
  //only the status flag type specified
 }
       }
   String strOffset = buffer.substring(3);
  return statusFlag + interpTypeFlag;
   TimeZone timeZone;}

    private static int parseIntFlag(String trybuffer) {
        int flag;
      double offset = Double.parseDouble(strOffset);try {
            timeZoneflag = TimeZoneUtilsTextUtils.createTimeZoneFromDoubleparseInt(offsetbuffer);
        } catch (NumberFormatException e) {
            throwflag new IOException("Invalid timeZone specified with TZ keyword:" + buffer, e)= Integer.MIN_VALUE;
        }
        return timeZoneflag;
    }
}