uk.ac.starlink.table
Class ConstantStarTable

java.lang.Object
  uk.ac.starlink.table.AbstractStarTable
      uk.ac.starlink.table.RandomStarTable
          uk.ac.starlink.table.ConstantStarTable

All Implemented Interfaces:

StarTable

public class ConstantStarTable
extends RandomStarTable

Table implementation representing a table in which every row is the same as every other.

Since:

3 Jul 2006

Constructor Summary

ConstantStarTable(ColumnInfo[] infos, java.lang.Object[] cells, long nrow)
Constructs a new constant star table.

Method Summary

java.lang.Object	getCell(long lrow, int icol) The AbstractStarTable implementation of this method throws an UnsupportedOperationException, since unless otherwise provided there is no random access.
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() The number of rows in this table.
boolean	isRandom() Returns true.

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

getRowSequence

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

checkedLongToInt, getColumnAuxDataInfos, getName, getParameterByName, getParameters, getRow, getURL, setName, setParameter, setParameters, setURL

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantStarTable

public ConstantStarTable(ColumnInfo[] infos,
                         java.lang.Object[] cells,
                         long nrow)

Constructs a new constant star table.

Parameters:

infos - array of column metadata objects (one for each column)

cells - row data - the same for every row

nrow - number of rows in this table

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

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

getRowCount

public long getRowCount()

Description copied from class: RandomStarTable

The number of rows in this table. Implementations must supply a non-negative return value.

Specified by:

getRowCount in interface StarTable

Specified by:

getRowCount in class RandomStarTable

Returns:

the number of rows in the table

isRandom

public boolean isRandom()

Description copied from class: RandomStarTable

Returns true.

Specified by:

isRandom in interface StarTable

Overrides:

isRandom in class RandomStarTable

Returns:

true

getCell

public java.lang.Object getCell(long lrow,
                                int icol)

Description copied from class: AbstractStarTable

The AbstractStarTable implementation of this method throws an UnsupportedOperationException, since unless otherwise provided there is no random access.

Specified by:

getCell in interface StarTable

Overrides:

getCell in class AbstractStarTable

Parameters:

lrow - the index of the cell's row

icol - the index of the cell's column

Returns:

the contents of this cell