org.basex.index
Class FTNode

java.lang.Object
  org.basex.index.FTNode

public final class FTNode
extends java.lang.Object

XPath Value representing a full-text Node.

Author:

Workgroup DBIS, University of Konstanz 2005-08, ISC License, Sebastian Gath

Field Summary

boolean	not Flag for negative node.
IntList	p Pointer for idpos - each idpos has a pointer at its search string position in the xpath query.
int	size Number of stored values..

Constructor Summary

FTNode()
Constructor.

FTNode(int[] idpos, int[] pointer)
Constructor.

Method Summary

IntList[]	convertPos() Converts the pos values in the following style.
void	genPointer(int v) Generates pointer with value v.
int[]	getFTNode() Returns the complete ftnode.
int	getNumTokens() Get number of tokens from query for this node.
int	getPre() Getter for the prevalue.
FTTokenizer[]	getToken() Getter for the FTTokenizer.
byte[]	getTokens() Convert all tokens to one byte[].
boolean	hasPos() Checks if node has position values.
boolean	merge(FTNode n, int w) Merges n to the current FTNode.
boolean	morePos() Test is any pos value is remaining.
int	nextPoi() Get next pointer.
int	nextPos() Get next pos value.
void	removePos() Removes current position value.
void	reset() Reset position iterator.
void	setToken(FTTokenizer[] token) Setter for FTTokenizer.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

p

public IntList p

Pointer for idpos - each idpos has a pointer at its search string position in the xpath query. poi[0] = max. max pointer value in poi

not

public boolean not

Flag for negative node.

size

public int size

Number of stored values..

Constructor Detail

FTNode

public FTNode()

Constructor.

FTNode

public FTNode(int[] idpos,
              int[] pointer)

Constructor.

Parameters:

idpos - ftdata, pre, pos1, ..., posn

pointer - pointer on query tokens

Method Detail

genPointer

public void genPointer(int v)

Generates pointer with value v.

Parameters:

v - value

getPre

public int getPre()

Getter for the prevalue.

Returns:

pre value

morePos

public boolean morePos()

Test is any pos value is remaining.

Returns:

boolean

reset

public void reset()

Reset position iterator.

setToken

public void setToken(FTTokenizer[] token)

Setter for FTTokenizer.

Parameters:

token - FTTokenizer

getToken

public FTTokenizer[] getToken()

Getter for the FTTokenizer.

Returns:

FTTokenizer

getTokens

public byte[] getTokens()

Convert all tokens to one byte[].

Returns:

byte[] tokens

nextPos

public int nextPos()

Get next pos value.

Returns:

pos value

removePos

public void removePos()

Removes current position value.

hasPos

public boolean hasPos()

Checks if node has position values.

Returns:

boolean has position values

getNumTokens

public int getNumTokens()

Get number of tokens from query for this node.

Returns:

number of tokens

merge

public boolean merge(FTNode n,
                     int w)

Merges n to the current FTNode. Pointer are node updated.

Parameters:

n - ftnode to be merged

w - distance between the pos values

Returns:

boolean

convertPos

public IntList[] convertPos()

Converts the pos values in the following style. [poi0]: pos0, ..., posk [poi1]: pos0, ..., posj

Returns:

IntList[]

nextPoi

public int nextPoi()

Get next pointer.

Returns:

next pointer

getFTNode

public int[] getFTNode()

Returns the complete ftnode.

Returns:

current ftnode

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object