ucar.nc2.iosp.gempak
Class GempakGrib2Data

java.lang.Object
  ucar.nc2.iosp.gempak.GempakGrib2Data

public final class GempakGrib2Data
extends Object

A class used to extract Grib2 data from a Gempak file. see IndexFormat.txt

Author:

Robb Kambic

Constructor Summary

GempakGrib2Data(RandomAccessFile raf)
Constructs a GempakGrib2Data object for a RandomAccessFile.

GempakGrib2Data(RandomAccessFile raf, boolean expandQuasi)
Constructs a GempakGrib2Data object for a RandomAccessFile.

Method Summary

float[]

getData(long start, long refTime) Reads the Grib data with a certain offsets in the file.

Methods inherited from class java.lang.Object

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

Constructor Detail

GempakGrib2Data

public GempakGrib2Data(RandomAccessFile raf)

Constructs a GempakGrib2Data object for a RandomAccessFile.

Parameters:

raf - ucar.unidata.io.RandomAccessFile with GRIB content

GempakGrib2Data

public GempakGrib2Data(RandomAccessFile raf,
                       boolean expandQuasi)

Constructs a GempakGrib2Data object for a RandomAccessFile.

Parameters:

raf - ucar.unidata.io.RandomAccessFile with GRIB content.

expandQuasi - whether to expand Quasi grids, default is true.

Method Detail

getData

public final float[] getData(long start,
                             long refTime)
                      throws IOException

Reads the Grib data with a certain offsets in the file.

Parameters:

start - starting point for reads

refTime - reference time in msecs

Returns:

float[]

Throws:

IOException - if raf does not contain a valid GRIB record.