uk.ac.starlink.table
Class RandomStarTable

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

All Implemented Interfaces:

StarTable

Direct Known Subclasses:

BeanStarTable, ColumnStarTable, ConstantStarTable, RandomResultSetStarTable, RowListStarTable

public abstract class RandomStarTable
extends AbstractStarTable

Implements a StarTable based on random access. The isRandom method always returns true, and the getRowSequence method is implemented using the table's (abstract) getCell and getRow methods.

Implementations of this object must supply a non-negative return value for getColumnCount method, because the RowSequence method requires this knowledge.

Constructor Summary

RandomStarTable()

Method Summary

abstract long	getRowCount() The number of rows in this table.
RowSequence	getRowSequence() Returns a RowSequence object based on the random data access methods of this table.
boolean	isRandom() Returns true.

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

checkedLongToInt, getCell, getColumnAuxDataInfos, getColumnCount, getColumnInfo, 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

RandomStarTable

public RandomStarTable()

Method Detail

isRandom

public boolean isRandom()

Returns true.

Specified by:

isRandom in interface StarTable

Overrides:

isRandom in class AbstractStarTable

Returns:

true

getRowSequence

public RowSequence getRowSequence()

Returns a RowSequence object based on the random data access methods of this table.

Specified by:

getRowSequence in interface StarTable

Specified by:

getRowSequence in class AbstractStarTable

Returns:

a row iterator

getRowCount

public abstract long getRowCount()

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 AbstractStarTable

Returns:

the number of rows in the table