Package org.orekit.files.spice.binary.daf.generic

Class DAF

java.lang.Object

org.orekit.files.spice.binary.daf.generic.DAF

public class DAF
extends Object

Class representing a generic DAF file, containing file-wide metadata, optional comments, and multiple DAFArray. DAF (Double Precision Array File) is a binary file architecture designed to store arrays of double precision arrays used by SPICE, NAIF toolkit software library. The architecture forms the basis of multiple file formats used to store different data related to astrodynamics, such as SPK, PCK and CK files (https://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/req/daf.html). DAF files provide a generic architecture onto which more specific file formats are implemented. They are organized in records of fixed length (1024 bytes) containing different information. The first record is called the file record, and contains global metadata for the file. This is followed by an optional block comprising any number of comment records. After this, the file consits of sets of summary records, name records and element records. These are structured as blocks of 1 summary record (which contains multiple array summaries, providing metadata about each array), followed by 1 name record (comprising names for the corresponding arrays whose summaries were in the previous summary record) and finally by as many element records as required to store the arrays described in the corresponding summary records. For a detailed description of the DAF architecture, see NAIF documentation (https://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/req/daf.html).

Since:

XX.XX

Author:

Rafael Ayala

Constructor Summary

Constructors

Constructor	Description
DAF(DAFFileRecord metadata, String comments, List<DAFArray> arrays)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
List<DAFArray>	getArrays()	Get the arrays contained in the DAF file.
String	getComments()	Get the comments from the DAF file.
DAFFileRecord	getMetadata()	Get thefile record, storing global file-wide metadata.

Methods inherited from class java.lang.Object

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

Constructor Details

DAF

public DAF(DAFFileRecord metadata,
 String comments,
 List<DAFArray> arrays)

Simple constructor.

Parameters:

metadata - global file-wide metadata for the DAF file contained in the file record

comments - comments from the DAF file. Not always present

arrays - list of DAFArray (each comprising an array summary, an array name and array elements)

Method Details

getMetadata

public DAFFileRecord getMetadata()

Get thefile record, storing global file-wide metadata.

Returns:

the DAFFileRecord

getComments

public String getComments()

Get the comments from the DAF file.

Returns:

comments from the DAF file

getArrays

public List<DAFArray> getArrays()

Get the arrays contained in the DAF file.

Returns:

list of DAFArray