ucar.nc2.ft
Interface PointFeatureCollection

All Superinterfaces:

FeatureCollection

All Known Subinterfaces:

ProfileFeature, StationTimeSeriesFeature, TrajectoryFeature

public interface PointFeatureCollection
extends FeatureCollection

A collection of PointFeatures.

Since:

Mar 1, 2008

Author:

caron

Method Summary

void	calcBounds() Caclulate date range and bounding box, and size, even if the data has to be scanned.
void	finish() Make sure that the internal iterator is complete, and recover resources.
ucar.unidata.geoloc.LatLonRect	getBoundingBox() The boundingBox for the FeatureCollection.
DateRange	getDateRange() Date range for the FeatureCollection.
PointFeatureIterator	getPointFeatureIterator(int bufferSize) Get an iterator over the PointFeatures of this collection
boolean	hasNext() Use the internal iterator to check if there is another PointFeature in the iteration.
PointFeature	next() Use the internal iterator to get the next PointFeature in the iteration.
void	resetIteration() Reset the internal iterator for another iteration over the PointFeatures in this Collection.
void	setBoundingBox(ucar.unidata.geoloc.LatLonRect bb) Set the boundingBox for the FeatureCollection.
void	setDateRange(DateRange range) Set the date range for the FeatureCollection.
void	setSize(int npts) Set the size of the FeatureCollection.
int	size() The number of points in the collection.
PointFeatureCollection	subset(ucar.unidata.geoloc.LatLonRect boundingBox, DateRange dateRange) Subset this collection by boundingBox and/or dateRange

Methods inherited from interface ucar.nc2.ft.FeatureCollection

getCollectionFeatureType, getName

Method Detail

hasNext

boolean hasNext()
                throws java.io.IOException

Use the internal iterator to check if there is another PointFeature in the iteration. Note that this is not thread-safe; use getPointFeatureIterator() for a threadsafe iterator.

Returns:

true is there is another PointFeature in the iteration.

Throws:

java.io.IOException - on read error

See Also:

PointFeatureIterator.hasNext()

next

PointFeature next()
                  throws java.io.IOException

Use the internal iterator to get the next PointFeature in the iteration. You must call hasNext() before you call this.

Returns:

the next PointFeature in the iteration

Throws:

java.io.IOException - on read error

See Also:

PointFeatureIterator.next()

resetIteration

void resetIteration()
                    throws java.io.IOException

Reset the internal iterator for another iteration over the PointFeatures in this Collection.

Throws:

java.io.IOException - on read error

finish

void finish()

Make sure that the internal iterator is complete, and recover resources. You must complete the iteration (until hasNext() returns false) or call finish().

See Also:

PointFeatureIterator.finish()

size

int size()

The number of points in the collection. May not be known until after iterating through the collection.

Returns:

number of points in the collection, or -1 if not known.

getDateRange

DateRange getDateRange()

Date range for the FeatureCollection. May not be known until after iterating through the collection.

Returns:

the date range for the entire collection, or null if unknown

getBoundingBox

ucar.unidata.geoloc.LatLonRect getBoundingBox()

The boundingBox for the FeatureCollection. May not be known until after iterating through the collection.

Returns:

the lat/lon boundingBox for the entire collection, or null if unknown.

setDateRange

void setDateRange(DateRange range)

Set the date range for the FeatureCollection.

Parameters:

range - the date range for the entire collection

setBoundingBox

void setBoundingBox(ucar.unidata.geoloc.LatLonRect bb)

Set the boundingBox for the FeatureCollection.

Parameters:

bb - the lat/lon boundingBox for the entire collection.

setSize

void setSize(int npts)

Set the size of the FeatureCollection.

Parameters:

npts - size of the collection

calcBounds

void calcBounds()
                throws java.io.IOException

Caclulate date range and bounding box, and size, even if the data has to be scanned. This ensures that getDateRange() and getBoundingBox() return non-null. If the collection already knows its size, date range and bounding box, then this has no effect.

Throws:

java.io.IOException - or read error.

getPointFeatureIterator

PointFeatureIterator getPointFeatureIterator(int bufferSize)
                                             throws java.io.IOException

Get an iterator over the PointFeatures of this collection

Parameters:

bufferSize - how many bytes can be used to buffer data, use -1 to use default.

Returns:

iterator over the PointFeatures of this collection

Throws:

java.io.IOException - on read error

subset

PointFeatureCollection subset(ucar.unidata.geoloc.LatLonRect boundingBox,
                              DateRange dateRange)
                              throws java.io.IOException

Subset this collection by boundingBox and/or dateRange

Parameters:

boundingBox - only points in this lat/lon bounding box. may be null.

dateRange - only points in this date range. may be null.

Returns:

subsetted collection, may be null if empty

Throws:

java.io.IOException - on read error