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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.IntegerResultNode;
import com.yahoo.searchlib.expression.ResultNode;
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 number of aggregated hits.
*
* @author baldersheim
* @author Simon Thoresen Hult
*/
public class CountAggregationResult extends AggregationResult {
public static final int classId = registerClass(0x4000 + 81, CountAggregationResult.class);
private long count = 0;
/** Constructs an empty result node. <b>NOTE:</b> This instance is broken until non-optional member data is set. */
public CountAggregationResult() {
}
/**
* Constructs an instance of this class with given count value.
*
* @param count the initial number of hits
*/
public CountAggregationResult(long count) {
setCount(count);
}
/** Returns the number of aggregated hits. */
public final long getCount() {
return count;
}
/**
* Sets the number of aggregated hits.
*
* @param count the count
* @return this, to allow chaining
*/
public final CountAggregationResult setCount(long count) {
this.count = count;
return this;
}
@Override
public ResultNode getRank() {
return new IntegerResultNode(count);
}
@Override
protected void onMerge(AggregationResult result) {
count += ((CountAggregationResult)result).count;
}
@Override
protected int onGetClassId() {
return classId;
}
@Override
protected void onSerialize(Serializer buf) {
super.onSerialize(buf);
buf.putLong(null, count);
}
@Override
protected void onDeserialize(Deserializer buf) {
super.onDeserialize(buf);
count = buf.getLong(null);
}
@Override
protected boolean equalsAggregation(AggregationResult obj) {
return count == ((CountAggregationResult)obj).count;
}
@Override
public int hashCode() {
return super.hashCode() + (int)count;
}
@Override
public void visitMembers(ObjectVisitor visitor) {
super.visitMembers(visitor);
visitor.visit("count", count);
}
}
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