uk.ac.starlink.topcat

Class SubsetStarTable

java.lang.Object

uk.ac.starlink.table.WrapperStarTable

uk.ac.starlink.topcat.SubsetStarTable

All Implemented Interfaces:

Closeable, AutoCloseable, uk.ac.starlink.table.StarTable

public class SubsetStarTable
extends uk.ac.starlink.table.WrapperStarTable

StarTable that applies a row subset selection to a given input table. This implementation is not random access, but does supply a non-trivial RowSplittable.

Since:

14 Dec 2020

Author:

Mark Taylor

Field Summary

Fields inherited from class uk.ac.starlink.table.WrapperStarTable

baseTable

Constructor Summary

Constructors

Constructor and Description
SubsetStarTable(uk.ac.starlink.table.StarTable base, RowSubset rset) Constructor.

Method Summary

Modifier and Type	Method and Description
static uk.ac.starlink.table.StarTable	createTable(uk.ac.starlink.table.StarTable table, RowSubset rset) Returns a table with row selection characteristics matching those of the given subset.
Object	getCell(long irow, int icol)
Object[]	getRow(long irow)
uk.ac.starlink.table.RowAccess	getRowAccess()
long	getRowCount()
uk.ac.starlink.table.RowSequence	getRowSequence()
uk.ac.starlink.table.RowSplittable	getRowSplittable() Note the row index reflects the index in the underlying table, not that of the subset table.
boolean	isRandom()

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

checkedLongToInt, close, getBaseTable, getColumnAuxDataInfos, getColumnCount, getColumnInfo, getName, getParameterByName, getParameters, getURL, setName, setParameter, setURL, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SubsetStarTable

public SubsetStarTable(uk.ac.starlink.table.StarTable base,
                       RowSubset rset)

Constructor.

Parameters:

base - table supplying row data

rset - subset defining row inclusion

Method Detail

isRandom

public boolean isRandom()

Specified by:

isRandom in interface uk.ac.starlink.table.StarTable

Overrides:

isRandom in class uk.ac.starlink.table.WrapperStarTable

getRowCount

public long getRowCount()

Specified by:

getRowCount in interface uk.ac.starlink.table.StarTable

Overrides:

getRowCount in class uk.ac.starlink.table.WrapperStarTable

getCell

public Object getCell(long irow,
                      int icol)

Specified by:

getCell in interface uk.ac.starlink.table.StarTable

Overrides:

getCell in class uk.ac.starlink.table.WrapperStarTable

getRow

public Object[] getRow(long irow)

Specified by:

getRow in interface uk.ac.starlink.table.StarTable

Overrides:

getRow in class uk.ac.starlink.table.WrapperStarTable

getRowAccess

public uk.ac.starlink.table.RowAccess getRowAccess()

Specified by:

getRowAccess in interface uk.ac.starlink.table.StarTable

Overrides:

getRowAccess in class uk.ac.starlink.table.WrapperStarTable

getRowSequence

public uk.ac.starlink.table.RowSequence getRowSequence()
                                                throws IOException

Specified by:

getRowSequence in interface uk.ac.starlink.table.StarTable

Overrides:

getRowSequence in class uk.ac.starlink.table.WrapperStarTable

Throws:

IOException

getRowSplittable

public uk.ac.starlink.table.RowSplittable getRowSplittable()
                                                    throws IOException

Note the row index reflects the index in the underlying table, not that of the subset table.

Specified by:

getRowSplittable in interface uk.ac.starlink.table.StarTable

Overrides:

getRowSplittable in class uk.ac.starlink.table.WrapperStarTable

Throws:

IOException

createTable

public static uk.ac.starlink.table.StarTable createTable(uk.ac.starlink.table.StarTable table,
                                                         RowSubset rset)

Returns a table with row selection characteristics matching those of the given subset.