/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.api.common.accumulators;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
public class DoubleCounter implements SimpleAccumulator<Double> {
private static final long serialVersionUID = 1L;
private double localValue = 0;
@Override
public void add(Double value) {
localValue += value;
}
@Override
public Double getLocalValue() {
return localValue;
}
@Override
public void merge(Accumulator<Double, Double> other) {
this.localValue += ((DoubleCounter) other).getLocalValue();
}
@Override
public void resetLocal() {
this.localValue = 0;
}
@Override
public void write(DataOutput out) throws IOException {
out.writeDouble(localValue);
}
@Override
public void read(DataInput in) throws IOException {
this.localValue = in.readDouble();
}
@Override
public String toString() {
return "DoubleCounter object. Local value: " + this.localValue;
}
}