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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the Classpath exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
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package com.sun.btrace.aggregation;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Aggregation function for counting the number of values.
* <p>
*
* @author Christian Glencross
*/
class Count implements AggregationValue {
AtomicInteger value = new AtomicInteger();
@Override
public void clear() {
value.set(0);
}
public void add() {
value.incrementAndGet();
}
@Override
public void add(long delta) {
if (delta >= 0) {
value.incrementAndGet();
} else {
value.decrementAndGet();
}
}
@Override
public long getValue() {
return value.get();
}
@Override
public Object getData() {
return getValue();
}
}