ca.pfv.spmf.patterns.itemset_array_integers_with_tids_bitset

Class Itemset

java.lang.Object

ca.pfv.spmf.patterns.AbstractItemset

ca.pfv.spmf.patterns.AbstractOrderedItemset

ca.pfv.spmf.patterns.itemset_array_integers_with_tids_bitset.Itemset

public class Itemset
extends AbstractOrderedItemset

This class represents an itemset (a set of items) where the itemset is an array of integers sorted by lexical order, an item should not appear more than once, the ids of transactions/sequences containing this itemset is represented as a bitset.

See Also:

AbstractOrderedItemset

Field Summary

Fields

Modifier and Type	Field and Description
int	cardinality
int[]	itemset The list of items contained in this itemset, ordered by lexical order

Constructor Summary

Constructors

Constructor and Description
Itemset() Constructor of an empty itemset
Itemset(int item) Constructor
Itemset(int[] items) Constructor
Itemset(int[] itemset, java.util.BitSet bitset, int support) Constructor of an empty itemset

Method Summary

Modifier and Type	Method and Description
java.lang.Integer	get(int index) Get the item at a given position of this itemset
int	getAbsoluteSupport() Get the support of this itemset
int[]	getItems() Get the list of items in this itemset
java.util.BitSet	getTransactionsIds() Get the list of transactions/sequences containing this itemset.
void	setTIDs(java.util.BitSet listTransactionIds, int cardinality) Set the list of transaction/sequence ids containing this itemset.
int	size() Get the size of this itemset.

Methods inherited from class ca.pfv.spmf.patterns.AbstractOrderedItemset

allTheSameExceptLastItem, allTheSameExceptLastItemV2, contains, containsAll, getLastItem, getRelativeSupport, isEqualTo, isEqualTo, toString

Methods inherited from class ca.pfv.spmf.patterns.AbstractItemset

getRelativeSupportAsString, print

Methods inherited from class java.lang.Object

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

Field Detail

itemset

public int[] itemset

The list of items contained in this itemset, ordered by lexical order

cardinality

public int cardinality

Constructor Detail

Itemset

public Itemset()

Constructor of an empty itemset

Itemset

public Itemset(int[] itemset,
               java.util.BitSet bitset,
               int support)

Constructor of an empty itemset

Parameters:

itemset - the itemset

the - tidset of the itemset

the - tidset cardinality (support)

Itemset

public Itemset(int item)

Constructor

Parameters:

item - an item that should be added to the new itemset

Itemset

public Itemset(int[] items)

Constructor

Parameters:

items - an array of items that should be added to the new itemset

Method Detail

getAbsoluteSupport

public int getAbsoluteSupport()

Get the support of this itemset

Specified by:

getAbsoluteSupport in class AbstractOrderedItemset

Returns:

the support of this itemset

getItems

public int[] getItems()

Get the list of items in this itemset

Returns:

the list of items

get

public java.lang.Integer get(int index)

Get the item at a given position of this itemset

Specified by:

get in class AbstractOrderedItemset

Parameters:

index - the position of the item to be returned

Returns:

the item

setTIDs

public void setTIDs(java.util.BitSet listTransactionIds,
                    int cardinality)

Set the list of transaction/sequence ids containing this itemset.

Parameters:

listTransactionIds - the list of transaction/sequence ids.

cardinality - the cardinality of the list.

size

public int size()

Get the size of this itemset.

Specified by:

size in class AbstractOrderedItemset

Returns:

the size of this itemset

getTransactionsIds

public java.util.BitSet getTransactionsIds()

Get the list of transactions/sequences containing this itemset.

Returns:

the list as a bitset.