org.basex.index
Class Values

java.lang.Object
  org.basex.index.Values

All Implemented Interfaces:

Index

public final class Values
extends Object
implements Index

This class provides access to attribute values and text contents stored on disk.

Author:

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

Constructor Summary

Values(Data d, boolean txt)
Constructor, initializing the index structure.

Method Summary

void	close() Closes the index.
IndexIterator	ids(IndexToken tok) Returns an iterator for the index results.
byte[]	info() Returns information on the index structure.
byte[]	nextPres() Returns next pre values.
int	nrIDs(IndexToken it) Returns the (approximate/estimated) number of ids for the specified token.

Methods inherited from class java.lang.Object

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

Constructor Detail

Values

public Values(Data d,
              boolean txt)
       throws IOException

Constructor, initializing the index structure.

Parameters:

d - data reference

txt - value type (texts/attributes)

Throws:

IOException - IO Exception

Method Detail

info

public byte[] info()

Description copied from interface: Index

Returns information on the index structure.

Specified by:

info in interface Index

Returns:

info

ids

public IndexIterator ids(IndexToken tok)

Description copied from interface: Index

Returns an iterator for the index results.

Specified by:

ids in interface Index

Parameters:

tok - token to be found

Returns:

ids

nrIDs

public int nrIDs(IndexToken it)

Description copied from interface: Index

Returns the (approximate/estimated) number of ids for the specified token.

Specified by:

nrIDs in interface Index

Parameters:

it - token to be found

Returns:

number of ids

nextPres

public byte[] nextPres()

Returns next pre values.

Returns:

compressed pre values

close

public void close()
           throws IOException

Description copied from interface: Index

Closes the index.

Specified by:

close in interface Index

Throws:

IOException - I/O exception