Examples of ucar.nc2.util.TableParser$DerivedField

ucar.nc2.util.TableParser
Describes one field in the record.

      throw new FileNotFoundException("No forecast date of " + time);  // we dont got it
    }


    @Override
    public String getName() {
      DateFormatter df = new DateFormatter();
      return "Constant Forecast " + df.toDateTimeStringISO(FmrcInv.makeOffsetDate(base, offset));
    }

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      boundingBox = geoCoverage.getBoundingBox();
    else // otherwise, stationHelper constructs from the station locations
      boundingBox = stationHelper.getBoundingBox();


    // get the date range if possible
    DateRange timeCoverage = invds.getTimeCoverage();
    if (timeCoverage != null) {
      startDate = timeCoverage.getStart().getDate();
      endDate = timeCoverage.getEnd().getDate();
    } else {
      startDate = new Date(0); // fake
      endDate = new Date();
    }

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    Attribute versionAtt = startElement.getAttributeByName( CatalogElementNames.CatalogElement_Version );
    String versionString = versionAtt != null ? versionAtt.getValue() : null;
    Attribute expiresAtt = startElement.getAttributeByName( CatalogElementNames.CatalogElement_Expires );
    String expiresString = expiresAtt != null ? expiresAtt.getValue() : null;
    DateType expires = null;
    try {
      expires = expiresString != null ? new DateType( expiresString, null, null ) : null;
    }
    catch ( ParseException e )
    {
      String msg = "Failed to parse catalog expires date [" + expiresString + "].";
      ThreddsXmlParserIssue issue = StaxThreddsXmlParserUtils.createIssueForException( msg, this.reader, e );
      log.warn( "parseStartElement(): " + issue.getMessage(), e );
      // ToDo Gather issues rather than throw exception.
      throw new ThreddsXmlParserException( issue );
    }
    Attribute lastModifiedAtt = startElement.getAttributeByName( CatalogElementNames.CatalogElement_LastModified );
    String lastModifiedString = lastModifiedAtt != null ? lastModifiedAtt.getValue() : null;
    DateType lastModified = null;
    try {
      lastModified = lastModifiedString != null ? new DateType( lastModifiedString, null, null ) : null;
    }
    catch ( ParseException e )
    {
      String msg = "Failed to parse catalog lastModified date [" + lastModifiedString + "].";
      ThreddsXmlParserIssue issue = StaxThreddsXmlParserUtils.createIssueForException( msg, this.reader, e );

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      Variable time = ds.findVariable("time_offset");
      if (time != null) {
        Variable base = ds.findVariable("base_time");
        int base_time = base.readScalarInt();
        try {
          DateUnit dunit = new DateUnit("seconds since 1970-01-01 00:00");
          String time_units = "seconds since " + dunit.makeStandardDateString(base_time);
          time.addAttribute(new Attribute("units", time_units));
          time.addAttribute(new Attribute(_Coordinate.AxisType, AxisType.Time.name()));
        } catch (Exception e) {
          e.printStackTrace();
        }

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    return " ";
  }


 private String isUdunits(String unit) {
    try {
      new DateUnit(unit);
      return "date";
    } catch (Exception e) {
      // ok
    }

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                uStart = description.lastIndexOf("(");
                if (uStart >= 0 && uEnd > uStart) {
                    String possibleUnitName = description.substring(uStart
                                                  + 1, uEnd);
                    try {
                        SimpleUnit u = SimpleUnit.factoryWithExceptions(
                                           possibleUnitName);
                        unitName = possibleUnitName;
                    } catch (Exception e) {
                        unitName = null;
                    }

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      return "time";
    } catch (Exception e) {
      // ok
    }


    SimpleUnit su = SimpleUnit.factory(unit);
    if (null == su) return "false";
    return su.getCanonicalString();
  }

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   */
  private double getGridSpacingInKm(String type) {
    double value = gds.getDouble(type);
    if (Double.isNaN(value)) return value;
    String gridUnit = gds.getParam(GridDefRecord.GRID_UNITS);
    SimpleUnit unit = null;


    if (gridUnit == null || gridUnit.length() == 0) {
      unit = SimpleUnit.meterUnit;
    } else {
      unit = SimpleUnit.factory(gridUnit);
    }
    if (unit != null && SimpleUnit.isCompatible(unit.getUnitString(), "km")) {
      value = unit.convertTo(value, SimpleUnit.kmUnit);
    }
    return value;


  }

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    } catch (Exception e) {
      // ok
    }


    try {
      new TimeUnit(unit);
      return "time";
    } catch (Exception e) {
      // ok
    }

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          ID: 11 digit identifier, digits 1-3=Country Code, digits 4-8 represent
              the WMO stnId if the station is a WMO station.  It is a WMO station if
              digits 9-11="000".
     */


    TableParser dataParser = new TableParser("11L,15i,19,24i,25,26,27");
    Structure dataSeq = new Sequence(ncfile, null, null, RECORD);
    ncfile.addVariable(null, dataSeq);
    ncfile.addDimension(null, new Dimension(DIM_NAME, 12));
    Variable v;


    makeMember(dataSeq, STNID, DataType.LONG, null, "station stnId", null, null, null);
    makeMember(dataSeq, YEAR, DataType.INT, null, "year of the station record", null, null, null);
    v = makeMember(dataSeq, VALUE, DataType.FLOAT, DIM_NAME, "monthly mean temperature", "Celsius", null, null);
    v.addAttribute(new Attribute(CF.MISSING_VALUE, -9999));
    dataParser.getField(3).setScale(.01f);
    makeMember(dataSeq, DMFLAG, DataType.CHAR, DIM_NAME, "data management flag", null, null, null);
    makeMember(dataSeq, QCFLAG, DataType.CHAR, DIM_NAME, "quality control flag", null, null, null);
    makeMember(dataSeq, DSFLAG, DataType.CHAR, DIM_NAME, "data source flag", null, null, null);


    // synthetic time variable
    v = makeMember(dataSeq, TIME, DataType.STRING, null, "starting time of the record", null, null, AxisType.Time);
    v.addAttribute(new Attribute(CF.MISSING_VALUE, "missing"));


    StructureMembers dataSm = dataSeq.makeStructureMembers();
    dataSm.findMember(STNID).setDataObject(dataParser.getField(0));
    dataSm.findMember(YEAR).setDataObject(dataParser.getField(1));
    dataSm.findMember(VALUE).setDataObject(dataParser.getField(3));
    dataSm.findMember(DMFLAG).setDataObject(dataParser.getField(4));
    dataSm.findMember(QCFLAG).setDataObject(dataParser.getField(5));
    dataSm.findMember(DSFLAG).setDataObject(dataParser.getField(6));
    dataSeq.setSPobject(new Vinfo(this.raf, dataSm));
    stnIdFromData = dataParser.getField(0);


    // synthetic time variable
    TableParser.Field org = dataParser.getField(1); // YEAR
    TableParser.Field derived = dataParser.addDerivedField(org, new TableParser.Transform() {
      public Object derive(Object org) {
        int year = (Integer) org;
        return year+"-01-01T00:00:00Z";
      }
    }, String.class);
    dataSm.findMember(TIME).setDataObject(derived);




    /*
       ID                 1-11        Integer
       LATITUDE          13-20        Real
       LONGITUDE         22-30        Real
       STNELEV           32-37        Real
       NAME              39-68        Character
       GRELEV            70-73        Integer
       POPCLS            74-74        Character
       POPSIZ            76-79        Integer
       TOPO              80-81        Character
       STVEG             82-83        Character
       STLOC             84-85        Character
       OCNDIS            86-87        Integer
       AIRSTN            88-88        Character
       TOWNDIS           89-90        Integer
       GRVEG             91-106       Character
       POPCSS            107-107      Character
      */


    TableParser stnParser = new TableParser("11L,20d,30d,37d,68,73i,74,79i,81,83,85,87i,88,90i,106,107");
    Structure stnSeq = new Sequence(ncfile, null, null, STNS);
    ncfile.addVariable(null, stnSeq);


    v = makeMember(stnSeq, STNID, DataType.LONG, null, "station id", null, null, null);
    v.addAttribute(new Attribute(CF.STANDARD_NAME, CF.STATION_ID));
    makeMember(stnSeq, LAT, DataType.FLOAT, null, "latitude", "degrees_north", null, null);
    makeMember(stnSeq, LON, DataType.FLOAT, null, "longitude", "degrees_east", null, null);
    makeMember(stnSeq, STELEV, DataType.FLOAT, null, "elevation", "m", null, null);
    v = makeMember(stnSeq, NAME, DataType.STRING, null, "station name", null, null, null);
    v.addAttribute(new Attribute(CF.STANDARD_NAME, CF.STATION_DESC));
    makeMember(stnSeq, GRELEV, DataType.INT, null, "elevation estimated from gridded digital terrain data", "m", null, null);
    makeMember(stnSeq, POPCLS, DataType.CHAR, null, "population class", null, null, null);
    v = makeMember(stnSeq, POPSIZ, DataType.INT, null, "population of the city or town the station is located in", "thousands of persons", null, null);
    v.addAttribute(new Attribute(CF.MISSING_VALUE, -9));
    makeMember(stnSeq, TOPO, DataType.STRING, null, "type of topography in the environment surrounding the station", null, null, null);
    makeMember(stnSeq, STVEG, DataType.STRING, null, "type of vegetation in environment of station", null, null, null);
    makeMember(stnSeq, STLOC, DataType.STRING, null, "station is near lake or ocean", null, null, null);
    v = makeMember(stnSeq, OCNDIS, DataType.INT, null, "distance to nearest ocean/lake", "km", null, null);
    v.addAttribute(new Attribute(CF.MISSING_VALUE, -9));
    makeMember(stnSeq, AIRSTN, DataType.CHAR, null, "airport station indicator", null, null, null);
    v = makeMember(stnSeq, TOWNDIS, DataType.INT, null, "distance from airport to center of associated city or town", "km", null, null);
    v.addAttribute(new Attribute(CF.MISSING_VALUE, -9));
    makeMember(stnSeq, GRVEG, DataType.STRING, null, "vegetation type at nearest 0.5 deg x 0.5 deg gridded data point of vegetation dataset", null, null, null);
    makeMember(stnSeq, POPCSS, DataType.CHAR, null, "population class as determined by satellite night lights", null, null, null);


    // nested sequence - just the data for this station
    Structure nestedSeq = new Sequence(ncfile, null, stnSeq, STN_DATA);
    stnSeq.addMemberVariable(nestedSeq);


    v = makeMember(nestedSeq, YEAR, DataType.INT, null, "year", null, null, null);
    v.addAttribute(new Attribute(CF.UNITS, "years since 0000-01-01T00:00"));
    v = makeMember(nestedSeq, VALUE, DataType.FLOAT, DIM_NAME, "monthly mean temperature", "Celsius", null, null);
    v.addAttribute(new Attribute(CF.MISSING_VALUE, -9999));
    dataParser.getField(3).setScale(.01f);
    makeMember(nestedSeq, DMFLAG, DataType.CHAR, DIM_NAME, "data management flag", null, null, null);
    makeMember(nestedSeq, QCFLAG, DataType.CHAR, DIM_NAME, "quality control flag", null, null, null);
    makeMember(nestedSeq, DSFLAG, DataType.CHAR, DIM_NAME, "data source flag", null, null, null);


    // synthetic time variable in nested seq
    v = makeMember(nestedSeq, TIME, DataType.STRING, null, "starting time of the record", null, null, AxisType.Time);
    v.addAttribute(new Attribute(CF.MISSING_VALUE, "missing"));


    StructureMembers nestedSm = nestedSeq.makeStructureMembers();
    nestedSm.findMember(YEAR).setDataObject(dataParser.getField(1));
    nestedSm.findMember(VALUE).setDataObject(dataParser.getField(3));
    nestedSm.findMember(DMFLAG).setDataObject(dataParser.getField(4));
    nestedSm.findMember(QCFLAG).setDataObject(dataParser.getField(5));
    nestedSm.findMember(DSFLAG).setDataObject(dataParser.getField(6));
    nestedSeq.setSPobject(new Vinfo(this.raf, nestedSm));
    stnDataMembers = nestedSm;


    // synthetic time variable in nested seq
    TableParser.Field org2 = dataParser.getField(1); // YEAR
    TableParser.Field derived2 = dataParser.addDerivedField(org2, new TableParser.Transform() {
      public Object derive(Object org) {
        int year = (Integer) org;
        return year+"-01-01T00:00:00Z";
      }
    }, String.class);
    nestedSm.findMember(TIME).setDataObject(derived2);


    //// finish the stn sequence


    // synthetic wmo variable in station
    v = makeMember(stnSeq, WMO, DataType.INT, null, "WMO station id", null, null, null);
    v.addAttribute(new Attribute(CF.MISSING_VALUE, -9999));
    v.addAttribute(new Attribute(CF.STANDARD_NAME, CF.STATION_WMOID));


    StructureMembers stnSm = stnSeq.makeStructureMembers();
    int count = 0;
    int n = stnParser.getNumberOfFields();
    for (StructureMembers.Member m : stnSm.getMembers()) {
      if (count < n)
        m.setDataObject(stnParser.getField(count++));
    }
    stnSeq.setSPobject(new Vinfo(stnRaf, stnSm));


    // synthetic wmo variable in station
    /* ID: 11 digit identifier, digits 1-3=Country Code, digits 4-8 represent
           the WMO id if the station is a WMO station.  It is a WMO station if
           digits 9-11="000". */
    TableParser.Field org3 = stnParser.getField(0); // STNID
    TableParser.Field derived3 = stnParser.addDerivedField(org3, new TableParser.Transform() {
      public Object derive(Object org) {
        long stnid = (Long) org;
        return (stnid % 1000 == 0) ? new Integer((int)(stnid/1000) % 100000) : new Integer(-9999);
      }
    }, int.class);

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