ucar.bufr
Class BufrIndexer

java.lang.Object
  ucar.bufr.BufrIndexer

public class BufrIndexer
extends java.lang.Object

Creates an index of the internal contents for a given BUFR file. BUFR files can be large, so if an Index is created, then data access can be fast by using offsets into the file. These offsets are based on a ob or a set of obs in the file. Using the BufrDataExtractor class and the information from the Index fast data extraction can be accomplished. see IndexFormat.txt netcdf-java Common Data Model uses the Index to display information about data location, time, and parameter names without accessing the file. The file is not actually read until a data request is made.

Constructor Summary

BufrIndexer()

Method Summary

static void	main(java.lang.String[] args) creates a Bufr index for given Bufr file.
static Index	writeFileIndex(ucar.unidata.io.RandomAccessFile inputRaf, java.io.PrintStream ps, boolean makeIndex) Write a Bufr file index; optionally create an in-memory index.

Methods inherited from class java.lang.Object

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

Constructor Detail

BufrIndexer

public BufrIndexer()

Method Detail

writeFileIndex

public static final Index writeFileIndex(ucar.unidata.io.RandomAccessFile inputRaf,
                                         java.io.PrintStream ps,
                                         boolean makeIndex)
                                  throws java.io.IOException

Write a Bufr file index; optionally create an in-memory index.

Parameters:

inputRaf - BUFR file raf

ps - write output to here

makeIndex - make an in-memory index if true

Returns:

Index if makeIndex is true, else null

Throws:

java.io.IOException

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

creates a Bufr index for given Bufr file.

Parameters:

args - 2 if Bufr file and index file name given

Throws:

java.io.IOException