org.axiondb.engine.rowiterators
Class TransformingRowIterator

java.lang.Object
  org.axiondb.engine.rowiterators.DelegatingRowIterator
      org.axiondb.engine.rowiterators.TransformingRowIterator

All Implemented Interfaces:

RowIterator

public abstract class TransformingRowIterator

extends DelegatingRowIterator

A DelegatingRowIterator that transforms each returned Row.

Version:

$Revision: 1.4 $ $Date: 2002/12/16 23:34:54 $

Constructor Summary

TransformingRowIterator(RowIterator iter)

Method Summary

Row	current() Returns the last Rowreturned by me (by next(),previous(), first(),last(), etc.).
Row	first() Returns the first Rowin the list, positioning the cursor to just before the first Rowin the list.
Row	last() Returns the last Rowin the list, positioning the cursor to just after the last Rowin the list.
Row	next() Returns the next Rowin the list, or throws NoSuchElementExceptionif no next Row exists.
Row	previous() Returns the previous Rowin the list, or throws NoSuchElementExceptionif no next Row exists.
protected abstract Row	transform(Row row)

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

add, currentIndex, getDelegate, hasCurrent, hasNext, hasPrevious, isEmpty, nextIndex, peekNext, peekPrevious, previousIndex, remove, reset, set, setDelegate

Methods inherited from class java.lang.Object

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

Constructor Detail

TransformingRowIterator

public TransformingRowIterator(RowIterator iter)

Method Detail

transform

protected abstract Row transform(Row row)

current

public Row current()

Description copied from interface: RowIterator

Returns the last Rowreturned by me (by RowIterator.next(),RowIterator.previous(), RowIterator.first(),RowIterator.last(), etc.).

Specified by:

current in interface RowIterator

Overrides:

current in class DelegatingRowIterator

first

public Row first()
          throws AxionException

Description copied from interface: RowIterator

Returns the first Rowin the list, positioning the cursor to just before the first Rowin the list. (In other words, after first is called both RowIterator.next()and RowIterator.current()will return the first row in the list.)

Specified by:

first in interface RowIterator

Overrides:

first in class DelegatingRowIterator

Throws:

AxionException

last

public Row last()
         throws AxionException

Description copied from interface: RowIterator

Returns the last Rowin the list, positioning the cursor to just after the last Rowin the list. (In other words, after last is called both RowIterator.previous()and RowIterator.current()will return the last row in the list.)

Specified by:

last in interface RowIterator

Overrides:

last in class DelegatingRowIterator

Throws:

AxionException

next

public Row next()
         throws AxionException

Description copied from interface: RowIterator

Returns the next Rowin the list, or throws NoSuchElementExceptionif no next Row exists.

Specified by:

next in interface RowIterator

Overrides:

next in class DelegatingRowIterator

Throws:

AxionException

previous

public Row previous()
             throws AxionException

Description copied from interface: RowIterator

Returns the previous Rowin the list, or throws NoSuchElementExceptionif no next Row exists.

Specified by:

previous in interface RowIterator

Overrides:

previous in class DelegatingRowIterator

Throws:

AxionException