Package noaa.coastwatch.io

Class CWNCReader

java.lang.Object

noaa.coastwatch.io.EarthDataReader

noaa.coastwatch.io.NCReader

noaa.coastwatch.io.CWNCReader

All Implemented Interfaces:

GridSubsetReader, NCSD

public class CWNCReader
extends NCReader

The CWNCReader class reads Java NetCDF accessible datasets and uses the CoastWatch HDF metadata conventions to parse the attribute and variable data.

Since:

3.2.0

Author:

Peter Hollemans

Field Summary

Fields inherited from class noaa.coastwatch.io.NCReader

dataset

Fields inherited from class noaa.coastwatch.io.EarthDataReader

dataProjection, info, rawMetadataMap, variables

Constructor Summary

Constructors

Constructor	Description
CWNCReader(String name)	Creates a new reader from the specified file.

Method Summary

Modifier and Type	Method	Description
protected DataVariable	getActualVariable(int index)	Gets the actual variable with data.
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.
protected void	initializeReader()	Performs reader initialization after the dataset has been opened.

Methods inherited from class noaa.coastwatch.io.NCReader

close, convertAttributeValue, getAttribute, getAttribute, getAttribute, getAttributeAsArray, getAttributeAsArray, getAttributeAsArray, getCoordinateSystems, getDataset, getFilename, getGridSubset, getRawMetadata, getReferencedFile, getVariable, getVariablesForSystem, isNetwork

Methods inherited from class noaa.coastwatch.io.EarthDataReader

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

Methods inherited from class java.lang.Object

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

Constructor Details

CWNCReader

public CWNCReader(String name)
           throws IOException

Creates a new reader from the specified file.

Parameters:

name - the file name or URL to read.

Throws:

IOException - if an error occurred reading the metadata.

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.

initializeReader

protected void initializeReader()
                         throws IOException

Description copied from class: NCReader

Performs reader initialization after the dataset has been opened.

Overrides:

initializeReader in class NCReader

Throws:

IOException - if an error occurred on initialization.

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)

getActualVariable

protected DataVariable getActualVariable(int index)
                                  throws IOException

Description copied from class: NCReader

Gets the actual variable with data. This method should be implemented in the child class and is only called if the variable is not already in the cache. See NCReader.getVariable(int) for the required behaviour.

Specified by:

getActualVariable in class NCReader

Throws:

IOException