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package ca.pfv.spmf.algorithms.sequentialpatterns.gsp_AGP.items.abstractions;
import java.util.HashMap;
import java.util.Map;
/**
* Class that implements a qualitative abstraction. Two different values are
* possible: to be with an equal relation with respect to a previous pair (if
* occurs at the same time), or to be with an after relation with respect to that
* previous pair (the previous pair have a before relation with respect to this one)
*
* 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 Abstraction_Qualitative extends Abstraction_Generic {
/**
* Two options: to have and equal relation respect the previous one, or not to have it
*/
private boolean equalRelation;
private static Map<Boolean, Abstraction_Qualitative> pool = new HashMap<Boolean, Abstraction_Qualitative>(4);
static{
Abstraction_Qualitative trueValue = new Abstraction_Qualitative(true);
Abstraction_Qualitative falseValue = new Abstraction_Qualitative(false);
pool.put(Boolean.TRUE, trueValue);
pool.put(Boolean.FALSE, falseValue);
}
public Abstraction_Qualitative(boolean equalRelation) {
super();
this.equalRelation = equalRelation;
}
public static Abstraction_Qualitative create(boolean equalRelation) {
return pool.get(equalRelation);
//return new Abstraction_Qualitative(mismoItemset);
}
@Override
public boolean equals(Object arg) {
Abstraction_Qualitative aq = (Abstraction_Qualitative) arg;
if (equalRelation == aq.hasEqualRelation()) {
return true;
}
return false;
}
@Override
public int hashCode() {
int hash = 7;
hash = 17 * hash + (this.equalRelation ? 1 : 0);
return hash;
}
public int compareTo(Abstraction_Generic o) {
Abstraction_Qualitative aq = (Abstraction_Qualitative) o;
if (equalRelation == aq.hasEqualRelation()) {
return 0;
} else if (!equalRelation) {
return -1;
}
return 1;
}
public boolean hasEqualRelation() {
return equalRelation;
}
/**
* Get the string representation of this object.
* @return the string representation.
*/
@Override
public String toString() {
StringBuilder result = new StringBuilder();
if (!hasEqualRelation()) {
result.append(" ->");
}
return result.toString();
}
public static void clear() {
//pool.clear();
}
/**
* Get a string representation in SPMF format.
* @return the string representation
*/
@Override
public String toStringToFile() {
StringBuilder result = new StringBuilder();
if (!hasEqualRelation()) {
result.append(" -1");
}
return result.toString();
}
}