ca.pfv.spmf.input.transaction_database_list_integers

Class TransactionDatabase

java.lang.Object

ca.pfv.spmf.input.transaction_database_list_integers.TransactionDatabase

public class TransactionDatabase
extends java.lang.Object

This class represents a transaction database (a.k.a. binary context), implemented as a list of integers. It can read a transaction database directly from a file. See the ca.pfv.spmf.test folder for some examples of files that can be read.

Constructor Summary

Constructors

Constructor and Description
TransactionDatabase()

Method Summary

Modifier and Type	Method and Description
void	addTransaction(java.util.List<java.lang.Integer> transaction) Method to add a new transaction to this database.
java.util.Set<java.lang.Integer>	getItems() Get the set of items contained in this database.
java.util.List<java.util.List<java.lang.Integer>>	getTransactions() Get the list of transactions in this database
void	loadFile(java.lang.String path) Method to load a file containing a transaction database into memory
void	printDatabase() Method to print the content of the transaction database to the console.
int	size() Get the number of transactions in this transaction database.

Methods inherited from class java.lang.Object

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

Constructor Detail

TransactionDatabase

public TransactionDatabase()

Method Detail

addTransaction

public void addTransaction(java.util.List<java.lang.Integer> transaction)

Method to add a new transaction to this database.

Parameters:

transaction - the transaction to be added

loadFile

public void loadFile(java.lang.String path)
              throws java.io.IOException

Method to load a file containing a transaction database into memory

Parameters:

path - the path of the file

Throws:

java.io.IOException - exception if error reading the file

printDatabase

public void printDatabase()

Method to print the content of the transaction database to the console.

size

public int size()

Get the number of transactions in this transaction database.

Returns:

the number of transactions.

getTransactions

public java.util.List<java.util.List<java.lang.Integer>> getTransactions()

Get the list of transactions in this database

Returns:

A list of transactions (a transaction is a list of Integer).

getItems

public java.util.Set<java.lang.Integer> getItems()

Get the set of items contained in this database.

Returns:

The set of items.