ucar.nc2.dt.point
Class OldUnidataStationObsDataset

java.lang.Object
  ucar.nc2.dt.TypedDatasetImpl
      ucar.nc2.dt.point.PointObsDatasetImpl
          ucar.nc2.dt.point.StationObsDatasetImpl
              ucar.nc2.dt.point.OldUnidataStationObsDataset

All Implemented Interfaces:

PointCollection, PointObsDataset, StationCollection, StationObsDataset, TypedDataset, TypedDatasetFactoryIF

public class OldUnidataStationObsDataset
extends StationObsDatasetImpl
implements TypedDatasetFactoryIF

This handles datasets in the old metar2nc format. It identifies them by looking at the title, expecting "METAR definition", "SYNOPTIC definition", or "BUOY definition". It uses an NcML file to identify the names of the lat, lon, etc variables.

Since there is no other way to find what the stations are, or to find what data belongs to what station, we read through the entire dataset at open. We construct the list of StationObsDatatype records, but without the data cached.

Version:

$Revision: 51 $ $Date: 2006-07-12 17:13:13Z $

Author:

caron

Field Summary

Fields inherited from class ucar.nc2.dt.point.StationObsDatasetImpl

stationHelper, stations

Fields inherited from class ucar.nc2.dt.point.PointObsDatasetImpl

formatter, meterUnit, timeUnit

Fields inherited from class ucar.nc2.dt.TypedDatasetImpl

boundingBox, dataVariables, desc, endDate, location, ncfile, parseInfo, startDate, title

Constructor Summary

OldUnidataStationObsDataset()

OldUnidataStationObsDataset(NetcdfDataset ds)

OldUnidataStationObsDataset(NetcdfDataset ds, java.lang.String ncmlURL)

Method Summary

java.util.List	getData(CancelTask cancel) Get all data, allow user to cancel.
java.util.List	getData(LatLonRect boundingBox, CancelTask cancel) Get all data within the specified bounding box, allow user to cancel.
java.util.List	getData(LatLonRect boundingBox, java.util.Date start, java.util.Date end, CancelTask cancel) Get all data within the specified bounding box and date range, allow user to cancel.
java.util.List	getData(Station s, CancelTask cancel) Get all data for this Station, allow user to cancel.
int	getDataCount() Get estimate of number of data records (may not be exact).
DataIterator	getDataIterator(int bufferSize) Get an efficient iterator over all the data in the Collection.
int	getStationDataCount(Station s) How many Data objects are available for this Station?
protected void	init(java.lang.String ncmlURL)
boolean	isMine(NetcdfDataset ds) Determine if this dataset belongs to you
static boolean	isValidFile(NetcdfFile ds)
TypedDataset	open(NetcdfDataset ncd, CancelTask task, java.lang.StringBuffer errlog) Open a NetcdfDataset as a TypedDataset.
protected void	setBoundingBox()
protected void	setEndDate()
protected void	setStartDate()
protected void	setTimeUnits()

Methods inherited from class ucar.nc2.dt.point.StationObsDatasetImpl

getData, getData, getData, getData, getData, getData, getData, getDataClass, getDataIterator, getDataIterator, getDetailInfo, getScientificDataType, getStation, getStations, getStations, getStations, getStations, sortByTime

Methods inherited from class ucar.nc2.dt.point.PointObsDatasetImpl

getData, getData, getData, getMetersConversionFactor, getTime, getTimeUnits

Methods inherited from class ucar.nc2.dt.TypedDatasetImpl

close, findGlobalAttributeIgnoreCase, getBoundingBox, getDataVariable, getDataVariables, getDescription, getEndDate, getGlobalAttributes, getLocationURI, getNetcdfFile, getStartDate, getTitle, removeDataVariable, setDescription, setLocationURI, setTitle

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface ucar.nc2.dt.TypedDatasetFactoryIF

getScientificDataType

Methods inherited from interface ucar.nc2.dt.TypedDataset

close, findGlobalAttributeIgnoreCase, getBoundingBox, getDataVariable, getDataVariables, getDescription, getEndDate, getGlobalAttributes, getLocationURI, getNetcdfFile, getStartDate, getTitle

Methods inherited from interface ucar.nc2.dt.PointCollection

getData, getData, getData, getTimeUnits

Constructor Detail

OldUnidataStationObsDataset

public OldUnidataStationObsDataset()

OldUnidataStationObsDataset

public OldUnidataStationObsDataset(NetcdfDataset ds)
                            throws java.io.IOException

Throws:

java.io.IOException

OldUnidataStationObsDataset

public OldUnidataStationObsDataset(NetcdfDataset ds,
                                   java.lang.String ncmlURL)
                            throws java.io.IOException

Throws:

java.io.IOException

Method Detail

isValidFile

public static boolean isValidFile(NetcdfFile ds)

isMine

public boolean isMine(NetcdfDataset ds)

Description copied from interface: TypedDatasetFactoryIF

Determine if this dataset belongs to you

Specified by:

isMine in interface TypedDatasetFactoryIF

Parameters:

ds - examine this NetcdfDataset to see if it belongs to this class.

Returns:

true if this class knows how to create a TypedDataset out of this NetcdfDataset.

open

public TypedDataset open(NetcdfDataset ncd,
                         CancelTask task,
                         java.lang.StringBuffer errlog)
                  throws java.io.IOException

Description copied from interface: TypedDatasetFactoryIF

Open a NetcdfDataset as a TypedDataset.

Specified by:

open in interface TypedDatasetFactoryIF

Parameters:

ncd - already opened NetcdfDataset.

task - use may cancel

errlog - place errors here

Returns:

a subclass of TypedDataset

Throws:

java.io.IOException - on error

init

protected void init(java.lang.String ncmlURL)
             throws java.io.IOException

Throws:

java.io.IOException

setTimeUnits

protected void setTimeUnits()

Specified by:

setTimeUnits in class PointObsDatasetImpl

setStartDate

protected void setStartDate()

Specified by:

setStartDate in class TypedDatasetImpl

setEndDate

protected void setEndDate()

Specified by:

setEndDate in class TypedDatasetImpl

setBoundingBox

protected void setBoundingBox()

Specified by:

setBoundingBox in class TypedDatasetImpl

getData

public java.util.List getData(CancelTask cancel)
                       throws java.io.IOException

Description copied from interface: PointCollection

Get all data, allow user to cancel. Return null if too expensive to implement. Call getDataCount() to get estimate of size. This will return a list of getDataClass(), but the actual data may or may not already be read in to memory. In any case, you call dataType.getData() to get the data.

Specified by:

getData in interface PointCollection

Parameters:

cancel - allow user to cancel. Implementors should return ASAP.

Returns:

List of type getDataClass()

Throws:

java.io.IOException

See Also:

as a (possibly) more efficient alternative

getDataCount

public int getDataCount()

Description copied from interface: PointCollection

Get estimate of number of data records (may not be exact). Return -1 if not able to estimate.

Specified by:

getDataCount in interface PointCollection

getData

public java.util.List getData(LatLonRect boundingBox,
                              CancelTask cancel)
                       throws java.io.IOException

Description copied from interface: PointCollection

Get all data within the specified bounding box, allow user to cancel.

Specified by:

getData in interface PointCollection

Overrides:

getData in class StationObsDatasetImpl

cancel - allow user to cancel. Implementors should return ASAP.

Returns:

List of type getDataClass()

Throws:

java.io.IOException

See Also:

as a (possibly) more efficient alternative

getData

public java.util.List getData(LatLonRect boundingBox,
                              java.util.Date start,
                              java.util.Date end,
                              CancelTask cancel)
                       throws java.io.IOException

Description copied from interface: PointCollection

Get all data within the specified bounding box and date range, allow user to cancel.

Specified by:

getData in interface PointCollection

Overrides:

getData in class StationObsDatasetImpl

cancel - allow user to cancel. Implementors should return ASAP.

Returns:

List of type getDataClass()

Throws:

java.io.IOException

See Also:

as a (possibly) more efficient alternative

getStationDataCount

public int getStationDataCount(Station s)

Description copied from interface: StationCollection

How many Data objects are available for this Station?

Specified by:

getStationDataCount in interface StationCollection

Overrides:

getStationDataCount in class StationObsDatasetImpl

Parameters:

s - station

Returns:

count or -1 if unknown.

getData

public java.util.List getData(Station s,
                              CancelTask cancel)
                       throws java.io.IOException

Description copied from interface: StationCollection

Get all data for this Station, allow user to cancel.

Specified by:

getData in interface StationCollection

cancel - allow user to cancel. Implementors should return ASAP.

Returns:

List of getDataClass()

Throws:

java.io.IOException

getDataIterator

public DataIterator getDataIterator(int bufferSize)
                             throws java.io.IOException

Description copied from interface: PointCollection

Get an efficient iterator over all the data in the Collection. You must fully process the data, or copy it out of the StructureData, as you iterate over it. DO NOT KEEP ANY REFERENCES to the dataType object or the StructureData object. This is the efficient way to get all the data, it can be 100 times faster than getData(). This will return an iterator over type getDataClass(), and the actual data has already been read into memory, that is, dataType.getData() will not incur any I/O. This is accomplished by buffering bufferSize amount of data at once.

We dont need a cancelTask, just stop the iteration if the user want to cancel.

Example for point observations:

 Iterator iter = pointObsDataset.getDataIterator();
 while (iter.hasNext()) {
   PointObsDatatype pobs = (PointObsDatatype) iter.next();
   StructureData sdata = pobs.getData();
   // process fully
 }
 

Specified by:

getDataIterator in interface PointCollection

Parameters:

bufferSize - if > 0, the internal buffer size, else use the default. Typically 100k - 1M for best results.

Returns:

iterator over type getDataClass(), no guarenteed order.

Throws:

java.io.IOException