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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.searchlib.treenet.rule;
/**
* @author Simon Thoresen Hult
*/
public abstract class TreeNode {
// The parent tree of this.
private Tree parent = null;
/**
* Returns the parent tree of this.
*/
public Tree getParent() {
return parent;
}
/**
* Sets the parent tree net of this.
*
* @param parent The parent tree net.
* @return This, to allow chaining.
*/
public TreeNode setParent(Tree parent) {
this.parent = parent;
return this;
}
/**
* Returns a ranking expression equivalent of this net.
*/
public abstract String toRankingExpression();
}
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