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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 xor of the aggregating expression for all matching hits.
*
* @author baldersheim
* @author Simon Thoresen Hult
*/
public class XorAggregationResult extends AggregationResult {
public static final int classId = registerClass(0x4000 + 86, XorAggregationResult.class);
private long xor = 0;
/**
* Constructs an empty result node. <b>NOTE:</b> This instance is broken until non-optional member data is set.
*/
public XorAggregationResult() {
}
/**
* Constructs an instance of this class with given xor value.
*
* @param xor The initial xor value to set.
*/
public XorAggregationResult(long xor) {
setXor(xor);
}
/**
* Returns the current xor value.
*
* @return The value.
*/
public long getXor() {
return xor;
}
/**
* Sets the current xor value.
*
* @param xor The value to set.
* @return This, to allow chaining.
*/
public XorAggregationResult setXor(long xor) {
this.xor = xor;
return this;
}
@Override
public ResultNode getRank() {
return new IntegerResultNode(xor);
}
@Override
protected int onGetClassId() {
return classId;
}
@Override
protected void onSerialize(Serializer buf) {
super.onSerialize(buf);
buf.putLong(null, xor);
}
@Override
protected void onDeserialize(Deserializer buf) {
super.onDeserialize(buf);
xor = buf.getLong(null);
}
@Override
protected void onMerge(AggregationResult result) {
xor = xor ^ ((XorAggregationResult)result).xor;
}
@Override
protected boolean equalsAggregation(AggregationResult obj) {
return xor == ((XorAggregationResult)obj).xor;
}
@Override
public int hashCode() {
return super.hashCode() + (int)xor;
}
@Override
public void visitMembers(ObjectVisitor visitor) {
super.visitMembers(visitor);
visitor.visit("xor", xor);
}
}
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