fr.cnes.sirius.patrius.signalpropagation.ionosphere

Class USKLoader

java.lang.Object

fr.cnes.sirius.patrius.signalpropagation.ionosphere.USKLoader

All Implemented Interfaces:

DataLoader, USKProvider

public final class USKLoader
extends Object
implements USKProvider, DataLoader

Reader for the USK data file (file of the "NEWUSK" type). Note : the code is ported from Fortran and not optimized. Since the file is not big, and its format is not meant to change often, it was decided an optimization pass was not needed.

Since:

1.3

Version:

$Id$

Author:

Thomas Trapier

Concurrency :

conditionally thread-safe

Concurrency comment :

the instance is mutable, but no longer changes after the first call to getData() (the first call triggers the DataProvidersManager on the instance). This means : an instance can be shared and used in several threads, if getData() is called once in a single thread context first.

Constructor Summary

Constructors

Constructor and Description
USKLoader(String fileName) Creates a USK data file reader and load the file.

Method Summary

Modifier and Type	Method and Description
fr.cnes.sirius.patrius.signalpropagation.ionosphere.USKData	getData(AbsoluteDate date, double r12) Returns the USK data for the Bent model.
void	loadData(InputStream input, String name) Load data from a stream.
boolean	stillAcceptsData() Check if the loader still accepts new data.

Methods inherited from class java.lang.Object

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

Constructor Detail

USKLoader

public USKLoader(String fileName)
          throws PatriusException

Creates a USK data file reader and load the file.

Parameters:

fileName - name of the file

Throws:

PatriusException - if a problem occurs during the file loading.

Method Detail

stillAcceptsData

public boolean stillAcceptsData()

Check if the loader still accepts new data.

This method is used to speed up data loading by interrupting crawling the data sets as soon as a loader has found the data it was waiting for. For loaders that can merge data from any number of sources (for example JPL ephemerides or Earth Orientation Parameters that are split among several files), this method should always return true to make sure no data is left over.

Specified by:

stillAcceptsData in interface DataLoader

Returns:

true while the loader still accepts new data

loadData

public void loadData(InputStream input,
                     String name)
              throws IOException,
                     ParseException,
                     PatriusException

Load data from a stream.

Specified by:

loadData in interface DataLoader

Parameters:

input - data input stream

name - name of the file (or zip entry)

Throws:

IOException - if data can't be read

ParseException - if data can't be parsed

PatriusException - if some data is missing or if some loader specific error occurs

getData

public fr.cnes.sirius.patrius.signalpropagation.ionosphere.USKData getData(AbsoluteDate date,
                                                                           double r12)
                                                                    throws PatriusException

Returns the USK data for the Bent model.

Specified by:

getData in interface USKProvider

Parameters:

date - the date

r12 - R12 constant value

Returns:

the USK data for the Bent model

Throws:

PatriusException - if a problem occurs in time scales management