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FloatingPointSumAggregator.java
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FloatingPointSumAggregator.java
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/*
* Copyright (c) 2008, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.aggregation.impl;
import com.hazelcast.aggregation.Aggregator;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import java.io.IOException;
public final class FloatingPointSumAggregator<I> extends AbstractAggregator<I, Number, Double>
implements IdentifiedDataSerializable {
private double sum;
public FloatingPointSumAggregator() {
super();
}
public FloatingPointSumAggregator(String attributePath) {
super(attributePath);
}
@Override
public void accumulateExtracted(Number value) {
sum += value.doubleValue();
}
@Override
public void combine(Aggregator aggregator) {
FloatingPointSumAggregator longSumAggregator = (FloatingPointSumAggregator) aggregator;
this.sum += longSumAggregator.sum;
}
@Override
public Double aggregate() {
return sum;
}
@Override
public int getFactoryId() {
return AggregatorDataSerializerHook.F_ID;
}
@Override
public int getId() {
return AggregatorDataSerializerHook.FLOATING_POINT_SUM;
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
out.writeUTF(attributePath);
out.writeDouble(sum);
}
@Override
public void readData(ObjectDataInput in) throws IOException {
this.attributePath = in.readUTF();
this.sum = in.readDouble();
}
}