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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.searchlib.aggregation;
import com.yahoo.searchlib.expression.ResultNode;
import com.yahoo.searchlib.expression.SingleResultNode;
import com.yahoo.vespa.objects.Deserializer;
import com.yahoo.vespa.objects.ObjectVisitor;
import com.yahoo.vespa.objects.Serializer;
/**
* This is an aggregated result holding the sum of the aggregating expression for all matching hits.
*
* @author baldersheim
* @author Simon Thoresen Hult
*/
public class SumAggregationResult extends AggregationResult {
public static final int classId = registerClass(0x4000 + 82, SumAggregationResult.class);
private SingleResultNode sum;
/**
* Constructs an empty result node. <b>NOTE:</b> This instance is broken until non-optional member data is set.
*/
public SumAggregationResult() {
}
/**
* Constructs an instance of this class with given sum.
*
* @param sum The initial sum to set.
*/
public SumAggregationResult(SingleResultNode sum) {
setSum(sum);
}
/**
* Returns the sum of all results in this.
*
* @return The numeric sum.
*/
public final SingleResultNode getSum() {
return sum;
}
/**
* Sets the sum of all results in this.
*
* @param sum The sum to set.
* @return This, to allow chaining.
*/
public final SumAggregationResult setSum(SingleResultNode sum) {
this.sum = sum;
return this;
}
@Override
public ResultNode getRank() {
return sum;
}
@Override
protected int onGetClassId() {
return classId;
}
@Override
protected void onSerialize(Serializer buf) {
super.onSerialize(buf);
serializeOptional(buf, sum);
}
@Override
protected void onDeserialize(Deserializer buf) {
super.onDeserialize(buf);
sum = (SingleResultNode)deserializeOptional(buf);
}
@Override
protected void onMerge(AggregationResult result) {
sum.add(((SumAggregationResult)result).sum);
}
@Override
public SumAggregationResult clone() {
SumAggregationResult obj = (SumAggregationResult)super.clone();
if (sum != null) {
obj.sum = (SingleResultNode)sum.clone();
}
return obj;
}
@Override
protected boolean equalsAggregation(AggregationResult obj) {
return equals(sum, ((SumAggregationResult)obj).sum);
}
@Override
public void visitMembers(ObjectVisitor visitor) {
super.visitMembers(visitor);
visitor.visit("sum", sum);
}
}
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