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(); } }