ca.pfv.spmf.algorithms.frequentpatterns.two_phase

Class ItemsetsTP

java.lang.Object

ca.pfv.spmf.algorithms.frequentpatterns.two_phase.ItemsetsTP

public class ItemsetsTP
extends java.lang.Object

This class represents a set of high utility itemsets found by the Two-Phase algorithm. They are ordered by size. For example, "level 1" means the itemsets of size 1 (containing 1 item).

See Also:

ItemsetTP, AlgoTwoPhase

Constructor Summary

Constructors

Constructor and Description
ItemsetsTP(java.lang.String name) Constructor.

Method Summary

Modifier and Type	Method and Description
void	addItemset(ItemsetTP itemset, int k) Add an itemset to these itemsets.
void	decreaseCount() Decrease the total number of itemsets by 1.
int	getItemsetsCount() Get the total number of itemsets.
java.util.List<java.util.List<ItemsetTP>>	getLevels() Get the itemsets stored in this structure as a List of List where position i contains the list of itemsets of size i.
void	printItemsets(int transactionCount) Print all itemsets to System.out
void	saveResultsToFile(java.lang.String output, int transactionCount) Save the itemsets to the file

Methods inherited from class java.lang.Object

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

Constructor Detail

ItemsetsTP

public ItemsetsTP(java.lang.String name)

Constructor.

Parameters:

name - a name to give to these itemsets

Method Detail

printItemsets

public void printItemsets(int transactionCount)

Print all itemsets to System.out

Parameters:

transactionCount - the number of transaction in the database

saveResultsToFile

public void saveResultsToFile(java.lang.String output,
                              int transactionCount)
                       throws java.io.IOException

Save the itemsets to the file

Parameters:

output - the output file path

transactionCount - the number of transactions in the database

Throws:

java.io.IOException - exception if error while writing the file

addItemset

public void addItemset(ItemsetTP itemset,
                       int k)

Add an itemset to these itemsets.

Parameters:

itemset - the itemset to be added

k - the size of the itemset

getLevels

public java.util.List<java.util.List<ItemsetTP>> getLevels()

Get the itemsets stored in this structure as a List of List where position i contains the list of itemsets of size i.

Returns:

the itemsets.

getItemsetsCount

public int getItemsetsCount()

Get the total number of itemsets.

Returns:

the itemset count.

decreaseCount

public void decreaseCount()

Decrease the total number of itemsets by 1.