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:

Closeable, AutoCloseable, 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

Author:

Mark Taylor

Constructor Summary

Constructors

Constructor and Description
ConstantStarTable(ColumnInfo[] infos, Object[] cells, long nrow) Constructs a new constant star table.

Method Summary

Modifier and Type	Method and Description
Object	getCell(long lrow, int icol) Implementations of this method must be safe for concurrent calls from multiple threads.
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() Implementations must supply a non-negative return value.
boolean	isRandom() Returns true.

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

getRowAccess, getRowSequence

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

checkedLongToInt, close, getColumnAuxDataInfos, getName, getParameters, getRow, getRowSplittable, getURL, 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

Constructor Detail

ConstantStarTable

public ConstantStarTable(ColumnInfo[] infos,
                         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

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 Object getCell(long lrow,
                      int icol)

Description copied from class: RandomStarTable

Implementations of this method must be safe for concurrent calls from multiple threads.

Specified by:

getCell in interface StarTable

Specified by:

getCell in class RandomStarTable

Parameters:

lrow - the index of the cell's row

icol - the index of the cell's column

Returns:

the contents of this cell