org.axiondb.engine.rowiterators
Class AbstractAcceptingRowIterator

java.lang.Object
  org.axiondb.engine.rowiterators.BaseRowIterator
      org.axiondb.engine.rowiterators.AbstractFilteringRowIterator
          org.axiondb.engine.rowiterators.AbstractAcceptingRowIterator

All Implemented Interfaces:

RowIterator

Direct Known Subclasses:

DistinctRowIterator, FilteringRowIterator

public abstract class AbstractAcceptingRowIterator
extends AbstractFilteringRowIterator

Abstract base DelegatingRowIteratorthat excludes Rows that are not acceptable.

Version:

$Revision: 1.5 $ $Date: 2005/04/08 13:40:43 $

Constructor Summary

AbstractAcceptingRowIterator(RowIterator iterator)

Method Summary

protected abstract boolean	acceptable(int rowindex, Row row) My filtering method.
protected boolean	determineNextRow()
protected boolean	determinePreviousRow()
void	set(Row row) Not supported in the base implementation.

Methods inherited from class org.axiondb.engine.rowiterators.AbstractFilteringRowIterator

clearNextRow, clearPreviousRow, current, currentIndex, getDelegate, hasCurrent, hasNext, hasPrevious, isNextAvailable, isPreviousAvailable, next, nextIndex, previous, previousIndex, remove, reset, setNext, setPrevious

Methods inherited from class org.axiondb.engine.rowiterators.BaseRowIterator

add, first, isEmpty, last, next, peekNext, peekPrevious, previous, size

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractAcceptingRowIterator

public AbstractAcceptingRowIterator(RowIterator iterator)

Method Detail

set

public void set(Row row)
         throws AxionException

Description copied from class: BaseRowIterator

Not supported in the base implementation.

Specified by:

set in interface RowIterator

Overrides:

set in class AbstractFilteringRowIterator

Throws:

AxionException

acceptable

protected abstract boolean acceptable(int rowindex,
                                      Row row)
                               throws AxionException

My filtering method. Return true if the given Rowshould be included in the iteration, false otherwise.

Throws:

AxionException

determineNextRow

protected boolean determineNextRow()
                            throws AxionException

Specified by:

determineNextRow in class AbstractFilteringRowIterator

Throws:

AxionException

determinePreviousRow

protected boolean determinePreviousRow()
                                throws AxionException

Specified by:

determinePreviousRow in class AbstractFilteringRowIterator

Throws:

AxionException