uk.ac.starlink.ttools.scheme

Class AttractorStarTable

java.lang.Object

uk.ac.starlink.table.AbstractStarTable

uk.ac.starlink.ttools.scheme.AttractorStarTable

All Implemented Interfaces:

Closeable, AutoCloseable, StarTable

public class AttractorStarTable
extends AbstractStarTable

StarTable implementation based on an Attractor.

Since:

20 Jul 2020

Author:

Mark Taylor

Field Summary

Fields

Modifier and Type	Field and Description
static ValueInfo	ATTRACTOR_INFO
static ValueInfo	FILL_INFO

Constructor Summary

Constructors

Constructor and Description
AttractorStarTable(AttractorFamily.Attractor att, long nrow) Constructor.

Method Summary

Modifier and Type	Method and Description
int	getColumnCount() Returns the number of columns in this table.
ColumnInfo	getColumnInfo(int icol) Returns the object describing the data in a given column.
long	getRowCount() Returns the number of rows in this table, if known.
RowSequence	getRowSequence() Returns an object which can iterate over all the rows in the table sequentially.
static void	main(String[] args) Writes some example attractor tables to stdout.
static void	writeFiles(AttractorFamily family, int nrow, int nfile) Utility/example method that can generate example tables corresponding to interesting (strange) attractors.

Methods inherited from class uk.ac.starlink.table.AbstractStarTable

checkedLongToInt, close, getCell, getColumnAuxDataInfos, getName, getParameters, getRow, getRowAccess, getRowSplittable, getURL, isRandom, setName, setParameters, setURL

Methods inherited from class java.lang.Object

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

Methods inherited from interface uk.ac.starlink.table.StarTable

getParameterByName, setParameter

Field Detail

ATTRACTOR_INFO

public static final ValueInfo ATTRACTOR_INFO

FILL_INFO

public static final ValueInfo FILL_INFO

Constructor Detail

AttractorStarTable

public AttractorStarTable(AttractorFamily.Attractor att,
                          long nrow)

Constructor.

Parameters:

att - attractor

nrow - row count

Method Detail

getColumnCount

public int getColumnCount()

Description copied from interface: StarTable

Returns the number of columns in this table.

Specified by:

getColumnCount in interface StarTable

Specified by:

getColumnCount in class AbstractStarTable

Returns:

the number of columns

getRowCount

public long getRowCount()

Description copied from interface: StarTable

Returns the number of rows in this table, if known. If the number of rows cannot be (easily) determined, a value of -1 will be returned.

Specified by:

getRowCount in interface StarTable

Specified by:

getRowCount in class AbstractStarTable

Returns:

the number of rows, or -1

getColumnInfo

public ColumnInfo getColumnInfo(int icol)

Description copied from interface: StarTable

Returns the object describing the data in a given column.

Specified by:

getColumnInfo in interface StarTable

Specified by:

getColumnInfo in class AbstractStarTable

Parameters:

icol - the column for which header information is required

Returns:

a ValueInfo object for column icol

getRowSequence

public RowSequence getRowSequence()

Description copied from interface: StarTable

Returns an object which can iterate over all the rows in the table sequentially. Each such returned object is safe for use within a single thread, but not in general from multiple threads concurrently.

Specified by:

getRowSequence in interface StarTable

Specified by:

getRowSequence in class AbstractStarTable

Returns:

new RowSequence

writeFiles

public static void writeFiles(AttractorFamily family,
                              int nrow,
                              int nfile)
                       throws IOException

Utility/example method that can generate example tables corresponding to interesting (strange) attractors. There is informative output to stdout, and the tables are written to the current directory.

Parameters:

family - attractor family

nrow - numer of rows in each output table

nfile - number of output table files to write

Throws:

IOException

main

public static void main(String[] args)
                 throws IOException

Writes some example attractor tables to stdout. Use -h for usage.

Throws:

IOException