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1 files changed, 48 insertions, 0 deletions

diff --git a/container-search/src/main/java/com/yahoo/search/intent/model/Node.java b/container-search/src/main/java/com/yahoo/search/intent/model/Node.java
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+++ b/container-search/src/main/java/com/yahoo/search/intent/model/Node.java
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+// Copyright 2016 Yahoo Inc. 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 <a href="TODO">intent model tree</a>
+ *
+ * @author <a href="mailto:bratseth@yahoo-inc.com">Jon Bratseth</a>
+ */
+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();
+    }
+
+    public int compareTo(Node other) {
+        if (this.getScore()<other.getScore()) return 1;
+        if (this.getScore()>other.getScore()) return -1;
+        return 0;
+    }
+
+    /**
+     * 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);
+
+}