package com.tesora.dve.common;
/*
* #%L
* Tesora Inc.
* Database Virtualization Engine
* %%
* Copyright (C) 2011 - 2014 Tesora Inc.
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
* #L%
*/
import java.util.Collection;
public final class MathUtils {
public static Long sum(final Collection<Long> values) {
Long sum = 0l;
for (final Long value : values) {
sum += value;
}
return sum;
}
public static double mean(final Collection<Long> values) {
final double total = sum(values);
return total / values.size();
}
public static double round(final double value, final int numDecimals) {
final double factor = Math.pow(10.0, numDecimals);
return Math.round(value * factor) / factor;
}
public static boolean isInteger(final double value) {
return value == Math.rint(value);
}
public static double getOneAtLeast(final double value) {
return Math.max(value, 1);
}
public static long getOneAtLeast(final long value) {
return Math.max(value, 1);
}
}