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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.vespa.objects.Deserializer;
import com.yahoo.vespa.objects.Identifiable;
import com.yahoo.vespa.objects.ObjectVisitor;
import com.yahoo.vespa.objects.Serializer;
/**
* This class represents a generic hit with a rank value. Actual hits are represented using subclasses of this class.
*
* @author havardpe
*/
public abstract class Hit extends Identifiable {
public static final int classId = registerClass(0x4000 + 94, Hit.class); // shared with c++
private Object context = null;
private double rank = 0.0;
/**
* Constructs an empty result node.
*/
public Hit() {
// empty
}
/**
* Create a new hit with the given rank
*
* @param rank generic rank value
*/
public Hit(double rank) {
this.rank = rank;
}
/**
* Obtain the rank of this hit. This is a comparable rank to allow multilevel sorting on arbitrary rank type.
*
* @return generic rank value
*/
public double getRank() {
return rank;
}
/**
* Returns the context object of this hit.
*
* @return The context object.
*/
public Object getContext() {
return context;
}
/**
* Sets the context object of this hit. This is not serialized, and is merely a tag used by the QRS.
*
* @param context The context to set.
* @return This, to allow chaining.
*/
public Hit setContext(Object context) {
this.context = context;
return this;
}
@Override
protected void onSerialize(Serializer buf) {
super.onSerialize(buf);
buf.putDouble(null, rank);
}
@Override
protected void onDeserialize(Deserializer buf) {
super.onDeserialize(buf);
rank = buf.getDouble(null);
}
@Override
public int hashCode() {
return super.hashCode() + (int)rank;
}
@SuppressWarnings({ "RedundantIfStatement" })
@Override
public boolean equals(Object obj) {
if (!super.equals(obj)) {
return false;
}
Hit rhs = (Hit)obj;
if (Double.compare(rank, rhs.rank) != 0) {
return false;
}
if (!equals(context, rhs.context)) {
return false;
}
return true;
}
@Override
public void visitMembers(ObjectVisitor visitor) {
super.visitMembers(visitor);
visitor.visit("rank", rank);
visitor.visit("context", context);
}
}
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