/*
* SonarQube
* Copyright (C) 2009-2017 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.server.computation.task.projectanalysis.formula.counter;
import com.google.common.base.Optional;
import javax.annotation.CheckForNull;
import javax.annotation.Nullable;
import org.sonar.server.computation.task.projectanalysis.formula.CounterInitializationContext;
import org.sonar.server.computation.task.projectanalysis.measure.Measure;
import static java.util.Objects.requireNonNull;
/**
* Simple counter that do the sum of an integer measure
*/
public class LongSumCounter implements SumCounter<Long, LongSumCounter> {
private final String metricKey;
@CheckForNull
private final Long defaultInputValue;
private long value = 0;
private boolean initialized = false;
public LongSumCounter(String metricKey) {
this(metricKey, null);
}
public LongSumCounter(String metricKey, @Nullable Long defaultInputValue) {
this.metricKey = requireNonNull(metricKey, "metricKey can not be null");
this.defaultInputValue = defaultInputValue;
}
@Override
public void aggregate(LongSumCounter counter) {
if (counter.getValue().isPresent()) {
addValue(counter.getValue().get());
}
}
@Override
public void initialize(CounterInitializationContext context) {
Optional<Measure> measureOptional = context.getMeasure(metricKey);
if (measureOptional.isPresent()) {
addValue(measureOptional.get().getLongValue());
} else if (defaultInputValue != null) {
addValue(defaultInputValue);
}
}
private void addValue(long newValue) {
initialized = true;
value += newValue;
}
@Override
public Optional<Long> getValue() {
if (initialized) {
return Optional.of(value);
}
return Optional.absent();
}
}