org.basex.index
Class Values

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

All Implemented Interfaces:

Index

public final class Values
extends java.lang.Object
implements Index

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

Author:

Workgroup DBIS, University of Konstanz 2005-07, ISC License, Christian Gruen

Nested Class Summary

Nested classes/interfaces inherited from interface org.basex.index.Index

Index.TYPE

Field Summary

int	size Number of hash entries.

Constructor Summary

Values(Data d, java.lang.String db, boolean txt)
Constructor, initializing the index structure.

Method Summary

void	close() Close the index.
int[][]	idPos(byte[] tok, FTOption ftO) Returns all ids from index stored for tok with respect to ftO.
int[]	ids(byte[] tok) Returns the (approximate) number of ids for the specified token.
int[]	ids(byte[] tok, FTOption ftO) Returns all ids from index stored for tok with respect to ftO.
void	info(PrintOutput out) Returns information on the index structure.
int	nrIDs(byte[] tok) Returns the decompressed ids for the specified token.

Methods inherited from class java.lang.Object

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

Field Detail

size

public int size

Number of hash entries.

Constructor Detail

Values

public Values(Data d,
              java.lang.String db,
              boolean txt)
       throws java.io.IOException

Constructor, initializing the index structure.

Parameters:

d - data reference

db - name of the database

txt - value type (texts/attributes)

Throws:

java.io.IOException - IO Exception

Method Detail

close

public void close()
           throws java.io.IOException

Close the index.

Specified by:

close in interface Index

Throws:

java.io.IOException - in case of write errors

idPos

public int[][] idPos(byte[] tok,
                     FTOption ftO)

Returns all ids from index stored for tok with respect to ftO.

Specified by:

idPos in interface Index

Parameters:

tok - token to be found

ftO - FTOption for tok

Returns:

number of ids

ids

public int[] ids(byte[] tok)

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

Specified by:

ids in interface Index

Parameters:

tok - token to be found

Returns:

number of ids

ids

public int[] ids(byte[] tok,
                 FTOption ftO)

Returns all ids from index stored for tok with respect to ftO.

Specified by:

ids in interface Index

Parameters:

tok - token to be found

ftO - FTOption for tok

Returns:

number of ids

info

public void info(PrintOutput out)
          throws java.io.IOException

Returns information on the index structure.

Specified by:

info in interface Index

Parameters:

out - output stream

Throws:

java.io.IOException - in case of write errors

nrIDs

public int nrIDs(byte[] tok)

Returns the decompressed ids for the specified token.

Specified by:

nrIDs in interface Index

Parameters:

tok - token to be found

Returns:

ids