package ca.pfv.spmf.input.sequence_database_array_integers;
/* Copyright (c) 2008-2013 Philippe Fournier-Viger
*
* This file is part of the SPMF DATA MINING SOFTWARE
* (http://www.philippe-fournier-viger.com/spmf).
*
* SPMF is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* SPMF is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* SPMF. If not, see <http://www.gnu.org/licenses/>.
*/
import java.util.ArrayList;
import java.util.List;
/**
* Implementation of a sequence as a list of itemsets, where itemsets are array of integers.
*
* @see SequenceDatabase
* @author Philipe-Fournier-Viger
**/
public class Sequence{
// A sequence is a list of itemsets, where an itemset is an array of integers
private final List<Integer[]> itemsets = new ArrayList<Integer[]>();
/**
* Add an itemset to this sequence.
* @param itemset An itemset (array of integers)
*/
public void addItemset(Object[] itemset) {
Integer[] itemsetInt = new Integer[itemset.length];
System.arraycopy(itemset, 0, itemsetInt, 0, itemset.length);
itemsets.add(itemsetInt);
}
/**
* Print this sequence to System.out.
*/
public void print() {
System.out.print(toString());
}
/**
* Return a string representation of this sequence.
*/
public String toString() {
StringBuilder r = new StringBuilder("");
// for each itemset
for(Integer[] itemset : itemsets){
r.append('(');
// for each item in the current itemset
for(int i=0; i< itemset.length; i++){
String string = itemset[i].toString();
r.append(string);
r.append(' ');
}
r.append(')');
}
return r.append(" ").toString();
}
/**
* Get the list of itemsets in this sequence.
* @return the list of itemsets.
*/
public List<Integer[]> getItemsets() {
return itemsets;
}
/**
* Get the itemset at a given position in this sequence.
* @param index the position
* @return the itemset as an array of integers.
*/
public Integer[] get(int index) {
return itemsets.get(index);
}
/**
* Get the size of this sequence (number of itemsets).
* @return the size (an integer).
*/
public int size(){
return itemsets.size();
}
}