org.wandora.query2

Class ResultIterator

java.lang.Object

org.wandora.query2.ResultIterator

Direct Known Subclasses:

AllTopics.AllTopicsIterator, First.FirstIterator, From.FromIterator, Join.JoinIterator, Recursive.RecursionIterator, ResultIterator.BufferedIterator, ResultIterator.CachedIterator, ResultIterator.EmptyIterator, ResultIterator.ListIterator, ResultIterator.SingleIterator, Union.StaticUnionIterator, Union.UnionIterator, Unique.UniqueIterator

public abstract class ResultIterator
extends java.lang.Object

Author:

olli

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ResultIterator.BufferedIterator
static class	ResultIterator.CachedIterator
static class	ResultIterator.EmptyIterator
static class	ResultIterator.ListIterator
static class	ResultIterator.SingleIterator

Constructor Summary

Constructors

Constructor and Description
ResultIterator()

Method Summary

Modifier and Type	Method and Description
abstract void	dispose() Finalizes the iterator and performs any cleanup needed.
abstract boolean	hasNext() Checks if there is another row available.
abstract ResultRow	next() Gets the next row in the results and moves the iterator forward one row.
abstract void	reset() Resets the iterator to its initial position.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResultIterator

public ResultIterator()

Method Detail

next

public abstract ResultRow next()
                        throws QueryException,
                               java.util.NoSuchElementException

Gets the next row in the results and moves the iterator forward one row. If there are no more rows NoSuchElementException is thrown.

Throws:

QueryException

java.util.NoSuchElementException

hasNext

public abstract boolean hasNext()
                         throws QueryException

Checks if there is another row available.

Throws:

QueryException

dispose

public abstract void dispose()
                      throws QueryException

Finalizes the iterator and performs any cleanup needed. This iterator cannot be used at all after a call to this.

Throws:

QueryException

reset

public abstract void reset()
                    throws QueryException

Resets the iterator to its initial position.

Throws:

QueryException