org.elasticsearch.search.aggregations.metrics.Cardinality Maven / Gradle / Ivy

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/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

package org.elasticsearch.search.aggregations.metrics;

/**
 * An aggregation that computes approximate numbers of unique terms.
 */
public interface Cardinality extends NumericMetricsAggregation.SingleValue {

    /**
     * The number of unique terms.
     */
    long getValue();

}