Package noaa.coastwatch.io

Class CWOpendapReader

java.lang.Object

noaa.coastwatch.io.EarthDataReader

noaa.coastwatch.io.OpendapReader

noaa.coastwatch.io.CWOpendapReader

public class CWOpendapReader
extends OpendapReader

The CWOpendapReader class reads OPeNDAP accessible datasets and uses the CoastWatch HDF metadata conventions to parse the attribute and variable data.

Since:

3.2.1

Author:

Peter Hollemans

Field Summary

Fields inherited from class noaa.coastwatch.io.OpendapReader

connect, das, dds

Fields inherited from class noaa.coastwatch.io.EarthDataReader

dataProjection, info, rawMetadataMap, variables

Constructor Summary

Constructors

Constructor	Description
CWOpendapReader(String url)	Creates a new reader using the specified URL.

Method Summary

Modifier and Type	Method	Description
String	getDataFormat()	Gets the data format description.
double	getMetaVersion()	Gets the CoastWatch HDF metadata version for this dataset.
protected DataVariable	getPreviewImpl(int index)	Implementation for the subclass.
DataVariable	getVariable(int index)	Creates a data variable object.
static void	main(String[] argv)	Tests this class.

Methods inherited from class noaa.coastwatch.io.OpendapReader

close, getAttributeMap, getPrimitiveClassType, isUnsigned

Methods inherited from class noaa.coastwatch.io.EarthDataReader

canUpdateNavigation, containsVariable, finalize, findVariable, getAllGrids, getAllVariables, getChunkProducer, getCoordinateSystems, getIndex, getInfo, getName, getPreview, getPreview, getRawMetadata, getRawMetadata, getSceneTime, getSource, getStatistics, getStatisticsVariables, getVariable, getVariables, getVariablesForSystem, putStatistics, setDataProjection, setUnitsMap, updateNavigation

Methods inherited from class java.lang.Object

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

Constructor Details

CWOpendapReader

public CWOpendapReader(String url)
                throws IOException

Creates a new reader using the specified URL.

Parameters:

url - the network location.

Throws:

IOException - if the an error occurred accessing the dataset.

Method Details

getDataFormat

public String getDataFormat()

Gets the data format description.

Specified by:

getDataFormat in class EarthDataReader

getMetaVersion

public double getMetaVersion()

Gets the CoastWatch HDF metadata version for this dataset.

Returns:

the metadata version. If no metadata attribute can be found, the metadata version is assumed to be 2.3.

getPreviewImpl

protected DataVariable getPreviewImpl(int index)
                               throws IOException

Description copied from class: EarthDataReader

Implementation for the subclass.

Specified by:

getPreviewImpl in class EarthDataReader

Throws:

IOException

See Also:

• EarthDataReader.getPreview(int)

getVariable

public DataVariable getVariable(int index)
                         throws IOException

Description copied from class: EarthDataReader

Creates a data variable object. The full data is read into the object.

Specified by:

getVariable in class EarthDataReader

Parameters:

index - the index of the variable to get. Indexing starts at 0.

Returns:

a data variable object with full data value array.

Throws:

IOException - if the data source had I/O errors.

See Also:

• EarthDataReader.getPreview(int)

main

public static void main(String[] argv)
                 throws Exception

Tests this class.

Parameters:

argv - the array of command line parameters.

Throws:

Exception