org.basex.index.value

Class UpdatableDiskValues

java.lang.Object

org.basex.index.value.DiskValues

org.basex.index.value.UpdatableDiskValues

All Implemented Interfaces:

Index

public final class UpdatableDiskValues
extends DiskValues

This class provides access to attribute values and text contents stored on disk. The data structure is described in the ValueBuilder class.

Author:

BaseX Team 2005-12, BSD License, Christian Gruen

Constructor Summary

Constructors

Constructor and Description
UpdatableDiskValues(Data d, boolean txt) Constructor, initializing the index structure.

Method Summary

Methods

Modifier and Type	Method and Description
void	delete(TokenObjMap<IntList> m) Delete records from the index.
protected int	firstpre(long pos) Gets the first pre value from the id-list at the specified position.
void	flush() Flushes the buffered data.
protected IndexIterator	idRange(RangeToken tok) Performs a range query.
void	index(TokenObjMap<IntList> m) Add entries to the index.
protected IndexIterator	iter(int s, long ps) Iterator method.
void	replace(byte[] o, byte[] n, int id) Remove record from the index.

Methods inherited from class org.basex.index.value.DiskValues

close, count, entries, info, iter

Methods inherited from class java.lang.Object

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

Constructor Detail

UpdatableDiskValues

public UpdatableDiskValues(Data d,
                   boolean txt)
                    throws java.io.IOException

Constructor, initializing the index structure.

Parameters:

d - data reference

txt - value type (texts/attributes)

Throws:

java.io.IOException - I/O Exception

Method Detail

iter

protected IndexIterator iter(int s,
                 long ps)

Description copied from class: DiskValues

Iterator method.

Parameters:

s - number of values

ps - offset

Returns:

iterator

idRange

protected IndexIterator idRange(RangeToken tok)

Description copied from class: DiskValues

Performs a range query. All index values must be numeric.

Parameters:

tok - index term

Returns:

results

firstpre

protected int firstpre(long pos)

Description copied from class: DiskValues

Gets the first pre value from the id-list at the specified position.

Parameters:

pos - position of the id-list in DiskValues.idxl

Returns:

pre value

flush

public void flush()
           throws java.io.IOException

Description copied from class: DiskValues

Flushes the buffered data.

Overrides:

flush in class DiskValues

Throws:

java.io.IOException - I/O exception

index

public void index(TokenObjMap<IntList> m)

Description copied from class: DiskValues

Add entries to the index.

Overrides:

index in class DiskValues

Parameters:

m - a set of pairs

delete

public void delete(TokenObjMap<IntList> m)

Description copied from class: DiskValues

Delete records from the index.

Overrides:

delete in class DiskValues

Parameters:

m - a set of pairs

replace

public void replace(byte[] o,
           byte[] n,
           int id)

Description copied from class: DiskValues

Remove record from the index.

Overrides:

replace in class DiskValues

Parameters:

o - old record key

n - new record key

id - record id