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* ownership. Elasticsearch licenses this file to you 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.search.aggregations.metrics.sum;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.aggregations.AggregationStreams;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.metrics.InternalNumericMetricsAggregation;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import org.elasticsearch.search.aggregations.support.format.ValueFormatter;
import org.elasticsearch.search.aggregations.support.format.ValueFormatterStreams;
import java.io.IOException;
import java.util.List;
import java.util.Map;
/**
*
*/
public class InternalSum extends InternalNumericMetricsAggregation.SingleValue implements Sum {
public final static Type TYPE = new Type("sum");
public final static AggregationStreams.Stream STREAM = new AggregationStreams.Stream() {
@Override
public InternalSum readResult(StreamInput in) throws IOException {
InternalSum result = new InternalSum();
result.readFrom(in);
return result;
}
};
public static void registerStreams() {
AggregationStreams.registerStream(STREAM, TYPE.stream());
}
private double sum;
InternalSum() {} // for serialization
InternalSum(String name, double sum, ValueFormatter formatter, List pipelineAggregators,
Map metaData) {
super(name, pipelineAggregators, metaData);
this.sum = sum;
this.valueFormatter = formatter;
}
@Override
public double value() {
return sum;
}
@Override
public double getValue() {
return sum;
}
@Override
public Type type() {
return TYPE;
}
@Override
public InternalSum doReduce(List aggregations, ReduceContext reduceContext) {
double sum = 0;
for (InternalAggregation aggregation : aggregations) {
sum += ((InternalSum) aggregation).sum;
}
return new InternalSum(name, sum, valueFormatter, pipelineAggregators(), getMetaData());
}
@Override
protected void doReadFrom(StreamInput in) throws IOException {
valueFormatter = ValueFormatterStreams.readOptional(in);
sum = in.readDouble();
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
ValueFormatterStreams.writeOptional(valueFormatter, out);
out.writeDouble(sum);
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
builder.field(CommonFields.VALUE, sum);
if (!(valueFormatter instanceof ValueFormatter.Raw)) {
builder.field(CommonFields.VALUE_AS_STRING, valueFormatter.format(sum));
}
return builder;
}
}