org.basex.query.iter
Class RangeIter

java.lang.Object
  org.basex.query.iter.Iter
      org.basex.query.iter.RangeIter

public final class RangeIter
extends Iter

Range iterator.

Author:

Workgroup DBIS, University of Konstanz 2005-10, ISC License, Christian Gruen

Field Summary

Fields inherited from class org.basex.query.iter.Iter

EMPTY

Constructor Summary

RangeIter(long mn, long mx)
Constructor.

Method Summary

Item	get(long i) Returns the specified item.
Item	next() Returns the next item or null if no other items are found.
boolean	reverse() Reverses the iterator and returns true.
int	size() Returns the number of entries.
String	toString()

Methods inherited from class org.basex.query.iter.Iter

finish, reset

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RangeIter

public RangeIter(long mn,
                 long mx)

Constructor.

Parameters:

mn - minimum value

mx - minimum value

Method Detail

next

public Item next()

Description copied from class: Iter

Returns the next item or null if no other items are found.

Specified by:

next in class Iter

Returns:

resulting item

size

public int size()

Description copied from class: Iter

Returns the number of entries. Note: -1 is returned if the number cannot be retrieved, so the returned value has to be checked. If this method is implemented, Iter.get(long) has to be implemented as well.

Overrides:

size in class Iter

Returns:

number of entries

get

public Item get(long i)

Description copied from class: Iter

Returns the specified item. Note: null is returned if the item cannot be retrieved, so the returned value has to be checked.

Overrides:

get in class Iter

Parameters:

i - value offset

Returns:

specified item

reverse

public boolean reverse()

Description copied from class: Iter

Reverses the iterator and returns true. Note: false is returned if the iterator cannot be reset, so the returned value has to be checked.

Overrides:

reverse in class Iter

Returns:

true if operator could be reversed

toString

public String toString()

Overrides:

toString in class Object