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package ca.pfv.spmf.algorithms.sequentialpatterns.gsp_AGP.items.creators;
import ca.pfv.spmf.algorithms.sequentialpatterns.gsp_AGP.items.Item;
import ca.pfv.spmf.algorithms.sequentialpatterns.gsp_AGP.items.abstractions.Abstraction_Generic;
import ca.pfv.spmf.algorithms.sequentialpatterns.gsp_AGP.items.abstractions.ItemAbstractionPair;
/**
* Class that implements the pair <item,abstraction> that is used in a pattern implementation.
*
* Copyright Antonio Gomariz PeƱalver 2013
*
* 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/>.
*
* @author agomariz
*/
public class ItemAbstractionPairCreator {
/**
* Static reference for make this class Singleton
*/
private static ItemAbstractionPairCreator instance = null;
//private static Map<Item, Map<Abstraction_Generic, ItemAbstractionPair>> pairPool = new HashMap<Item, Map<Abstraction_Generic, ItemAbstractionPair>>();
private ItemAbstractionPairCreator() {
}
public static void clear(){
instance=null;
//pairPool.clear();
}
/**
* Get the static instance of the class (a singleton).
* @return the instance
*/
public static ItemAbstractionPairCreator getInstance() {
if (instance == null) {
instance = new ItemAbstractionPairCreator();
}
return instance;
}
/**
* It returns a pair composed by an item and an abstraction
* @param item the given item
* @param abstraction the given abstraction
* @return the duple <item, abstraction>
*/
public ItemAbstractionPair getItemAbstractionPair(Item item, Abstraction_Generic abstraction) {
/*Map<Abstraction_Generic, ItemAbstractionPair> itemPair = pairPool.get(item);*/
ItemAbstractionPair pair;
/*if (itemPair != null) {
pair = itemPair.get(abstraction);
if (pair == null) {*/
pair = new ItemAbstractionPair(item, abstraction);
/*itemPair.put(abstraction, pair);
}
} else {
itemPair = new HashMap<Abstraction_Generic, ItemAbstractionPair>();
pair = new ItemAbstractionPair(item, abstraction);
itemPair.put(abstraction, pair);
pairPool.put(item, itemPair);
}*/
return pair;
}
}