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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.intent.model;
import java.util.Map;
/**
* A node in the intent model tree
*
* @author bratseth
*/
public abstract class Node implements Comparable<Node> {
/**
* The score, unless getScore/setScore is overridden which is the case with interpretations,
* so DO NOT ACCESS SCORE DIRECTLY, ALWAYS USE GET/SET
*/
private double score;
public Node(double score) {
this.score = score;
}
/** Returns the normalized (0-1) score of this node */
public double getScore() { return score; }
/** Sets the normalized (0-1) score of this node */
public void setScore(double score) { this.score = score; }
/** Increases this score by an increment and returns the new score */
public double increaseScore(double increment) {
setScore(getScore() + increment);
return getScore();
}
@Override
public int compareTo(Node other) {
if (this.getScore() < other.getScore()) return 1;
if (this.getScore() > other.getScore()) return -1;
return 0;
}
@Override
public boolean equals(Object other) {
if (other == this) return true;
if ( ! (other instanceof Node)) return false;
return this.getScore() == ((Node)other).getScore();
}
@Override
public int hashCode() {
return Double.hashCode(getScore());
}
/**
* Adds the sources at (and beneath) this node to the given
* sparsely represented source vector, weighted by the score of this node
* times the given weight from the parent path
*/
abstract void addSources(double weight, Map<Source, SourceNode> sources);
}
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