/*
Copyright 2008-2010 Gephi
Authors : Cezary Bartosiak
Website : http://www.gephi.org
This file is part of Gephi.
Gephi is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
Gephi 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with Gephi. If not, see <http://www.gnu.org/licenses/>.
*/
package org.gephi.data.attributes.type;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Hashtable;
import java.util.List;
import org.gephi.data.attributes.api.Estimator;
/**
* Represents {@link BigDecimal} type which can have got different values in
* different time intervals.
*
* @author Cezary Bartosiak
*/
public final class DynamicBigDecimal extends DynamicType<BigDecimal> {
/**
* Constructs a new {@code DynamicType} instance with no intervals.
*/
public DynamicBigDecimal() {
super();
}
/**
* Constructs a new {@code DynamicType} instance that contains a given
* {@code Interval<T>} in.
*
* @param in interval to add (could be null)
*/
public DynamicBigDecimal(Interval<BigDecimal> in) {
super(in);
}
/**
* Constructs a new {@code DynamicType} instance with intervals given by
* {@code List<Interval<T>>} in.
*
* @param in intervals to add (could be null)
*/
public DynamicBigDecimal(List<Interval<BigDecimal>> in) {
super(in);
}
/**
* Constructs a deep copy of {@code source}.
*
* @param source an object to copy from (could be null, then completely new
* instance is created)
*/
public DynamicBigDecimal(DynamicBigDecimal source) {
super(source);
}
/**
* Constructs a deep copy of {@code source} that contains a given
* {@code Interval<T>} in.
*
* @param source an object to copy from (could be null, then completely new
* instance is created)
* @param in interval to add (could be null)
*/
public DynamicBigDecimal(DynamicBigDecimal source, Interval<BigDecimal> in) {
super(source, in);
}
/**
* Constructs a deep copy of {@code source} that contains a given
* {@code Interval<T>} in. Before add it removes from the newly created
* object all intervals that overlap with a given {@code Interval<T>} out.
*
* @param source an object to copy from (could be null, then completely new
* instance is created)
* @param in interval to add (could be null)
* @param out interval to remove (could be null)
*/
public DynamicBigDecimal(DynamicBigDecimal source, Interval<BigDecimal> in, Interval<BigDecimal> out) {
super(source, in, out);
}
/**
* Constructs a deep copy of {@code source} with additional intervals
* given by {@code List<Interval<T>>} in.
*
* @param source an object to copy from (could be null, then completely new
* instance is created)
* @param in intervals to add (could be null)
*/
public DynamicBigDecimal(DynamicBigDecimal source, List<Interval<BigDecimal>> in) {
super(source, in);
}
/**
* Constructs a deep copy of {@code source} with additional intervals
* given by {@code List<Interval<T>>} in. Before add it removes from the
* newly created object all intervals that overlap with intervals given by
* {@code List<Interval<T>>} out.
*
* @param source an object to copy from (could be null, then completely new
* instance is created)
* @param in intervals to add (could be null)
* @param out intervals to remove (could be null)
*/
public DynamicBigDecimal(DynamicBigDecimal source, List<Interval<BigDecimal>> in, List<Interval<BigDecimal>> out) {
super(source, in, out);
}
@Override
public BigDecimal getValue(Interval interval, Estimator estimator) {
List<BigDecimal> values = getValues(interval);
if (values.isEmpty())
return null;
switch (estimator) {
case AVERAGE:
if (values.size() == 1)
return values.get(0);
BigDecimal total = new BigDecimal(0);
for (int i = 0; i < values.size(); ++i)
total = total.add(values.get(i));
return total.divide(BigDecimal.valueOf(values.size()), RoundingMode.HALF_UP);
case MEDIAN:
if (values.size() % 2 == 1)
return values.get(values.size() / 2);
BigDecimal bd = values.get(values.size() / 2 - 1);
bd = bd.add(values.get(values.size() / 2));
return bd.divide(new BigDecimal(2));
case MODE:
Hashtable<Integer, Integer> map =
new Hashtable<Integer, Integer>();
for (int i = 0; i < values.size(); ++i) {
int prev = 0;
if (map.containsKey(values.get(i).hashCode()))
prev = map.get(values.get(i).hashCode());
map.put(values.get(i).hashCode(), prev + 1);
}
int max = map.get(values.get(0).hashCode());
int index = 0;
for (int i = 1; i < values.size(); ++i)
if (max < map.get(values.get(i).hashCode())) {
max = map.get(values.get(i).hashCode());
index = i;
}
return values.get(index);
case SUM:
BigDecimal sum = new BigDecimal(0);
for (int i = 0; i < values.size(); ++i)
sum = sum.add(values.get(i));
return sum;
case MIN:
BigDecimal minimum = values.get(0);
for (int i = 1; i < values.size(); ++i)
if (minimum.compareTo(values.get(i)) > 0)
minimum = values.get(i);
return minimum;
case MAX:
BigDecimal maximum = values.get(0);
for (int i = 1; i < values.size(); ++i)
if (maximum.compareTo(values.get(i)) < 0)
maximum = values.get(i);
return maximum;
case FIRST:
return values.get(0);
case LAST:
return values.get(values.size() - 1);
default:
throw new IllegalArgumentException("Unknown estimator.");
}
}
@Override
public Class getUnderlyingType() {
return BigDecimal.class;
}
}