org.basex.index
Class IndexArrayIterator

java.lang.Object
  org.basex.index.IndexArrayIterator

All Implemented Interfaces:

IndexIterator

public class IndexArrayIterator
extends java.lang.Object
implements IndexIterator

This interface provides methods for returning index results.

Author:

Workgroup DBIS, University of Konstanz 2005-09, ISC License, Christian Gruen

Field Summary

static IndexArrayIterator

EMP Empty iterator.

Fields inherited from interface org.basex.index.IndexIterator

EMPTY

Constructor Summary

IndexArrayIterator(int s)
Constructor.

IndexArrayIterator(int[][] res, boolean c)
Constructor.

Method Summary

static IndexArrayIterator	and(IndexArrayIterator iai1, IndexArrayIterator iai2, int w) Merges two index array iterators.
static IndexArrayIterator	merge(IndexArrayIterator iai1, IndexArrayIterator iai2) Merges two index array iterators.
boolean	more() Checks if more results are available.
int	next() Returns the next result.
FTNode	nextFTNode() Returns the next FTNode.
void	setToken(FTTokenizer[] token) Sets the tokenizer.
void	setTokenNum(int tn) Sets the unique token number.
int	size() Returns the number of index results.

Methods inherited from class java.lang.Object

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

Field Detail

EMP

public static final IndexArrayIterator EMP

Empty iterator.

Constructor Detail

IndexArrayIterator

public IndexArrayIterator(int s)

Constructor.

Parameters:

s - size

IndexArrayIterator

public IndexArrayIterator(int[][] res,
                          boolean c)

Constructor.

Parameters:

res - pre array

c - Flag for data converting

Method Detail

more

public boolean more()

Checks if more results are available.

Returns:

result

nextFTNode

public FTNode nextFTNode()

Returns the next FTNode.

Returns:

FTNode next FTNode

next

public int next()

Description copied from interface: IndexIterator

Returns the next result.

Specified by:

next in interface IndexIterator

Returns:

result

size

public int size()

Description copied from interface: IndexIterator

Returns the number of index results.

Specified by:

size in interface IndexIterator

Returns:

size

setTokenNum

public void setTokenNum(int tn)

Sets the unique token number. Used for visualization.

Parameters:

tn - number of tokens

setToken

public void setToken(FTTokenizer[] token)

Sets the tokenizer.

Parameters:

token - FTTokenizer

merge

public static IndexArrayIterator merge(IndexArrayIterator iai1,
                                       IndexArrayIterator iai2)

Merges two index array iterators.

Parameters:

iai1 - first index array iterator to merge

iai2 - second index array iterator to merge

Returns:

IndexArrayIterator

and

public static IndexArrayIterator and(IndexArrayIterator iai1,
                                     IndexArrayIterator iai2,
                                     int w)

Merges two index array iterators.

Parameters:

iai1 - first index array iterator to merge

iai2 - second index array iterator to merge

w - distance between two pos values

Returns:

IndexArrayIterator