org.aksw.limes.core.measures.mapper.space.blocking

Class VariableGranularityBlocker

java.lang.Object

org.aksw.limes.core.measures.mapper.space.blocking.VariableGranularityBlocker

All Implemented Interfaces:

IBlockingModule

public class VariableGranularityBlocker
extends Object
implements IBlockingModule

Author:

Axel-C. Ngonga Ngomo (ngonga@informatik.uni-leipzig.de)

Constructor Summary

Constructors

Constructor and Description
VariableGranularityBlocker(String props, String measureName, double threshold)
VariableGranularityBlocker(String props, String measureName, double threshold, int _granularity)

Method Summary

Modifier and Type	Method and Description
static ArrayList<ArrayList<Double>>	addIdsToList(ArrayList<ArrayList<Double>> keys, TreeSet<String> propValues)
static ArrayList<Double>	copyList(ArrayList<Double> list)
ArrayList<ArrayList<Integer>>	getAllBlockIds(Instance a) Computes all the block ids for a given instance.
ArrayList<ArrayList<Integer>>	getAllSourceIds(Instance a, String props) Computes all the block ids for a given instance.
ArrayList<Integer>	getBlockId(Instance a)
ArrayList<ArrayList<Integer>>	getBlocksToCompare(ArrayList<Integer> blockId) Computes the block ID for a given instance a.
void	setGranularity(int n)

Methods inherited from class java.lang.Object

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

Constructor Detail

VariableGranularityBlocker

public VariableGranularityBlocker(String props,
                                  String measureName,
                                  double threshold)

VariableGranularityBlocker

public VariableGranularityBlocker(String props,
                                  String measureName,
                                  double threshold,
                                  int _granularity)

Method Detail

copyList

public static ArrayList<Double> copyList(ArrayList<Double> list)

addIdsToList

public static ArrayList<ArrayList<Double>> addIdsToList(ArrayList<ArrayList<Double>> keys,
                                                        TreeSet<String> propValues)

setGranularity

public void setGranularity(int n)

getBlocksToCompare

public ArrayList<ArrayList<Integer>> getBlocksToCompare(ArrayList<Integer> blockId)

Computes the block ID for a given instance a. The idea behind the blocking is to tile the target space into blocks of dimension thresdhold^dimensions. Each instance s from the source space is then compared with the blocks lying directly around s's block and the block where s is.

Specified by:

getBlocksToCompare in interface IBlockingModule

Parameters:

blockId - The instance whose blockId is to be computed

Returns:

The ID for the block of a

getBlockId

public ArrayList<Integer> getBlockId(Instance a)

Specified by:

getBlockId in interface IBlockingModule

getAllBlockIds

public ArrayList<ArrayList<Integer>> getAllBlockIds(Instance a)

Computes all the block ids for a given instance. If it is known that the coordinates of an instance are unique, then use getBlockId. If not, use this method.

Specified by:

getAllBlockIds in interface IBlockingModule

Parameters:

a - Instance, whose ids are to be returned

Returns:

An ArrayList of blockids

getAllSourceIds

public ArrayList<ArrayList<Integer>> getAllSourceIds(Instance a,
                                                     String props)

Computes all the block ids for a given instance. If it is known that the coordinates of an instance are unique, then use getBlockId. If not, use this method.

Specified by:

getAllSourceIds in interface IBlockingModule

Parameters:

a - Instance, whose ids are to be returned

Returns:

An ArrayList of blockids