org.apache.pinot.segment.local.customobject.SerializedFrequentLongsSketch Maven / Gradle / Ivy

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.pinot.segment.local.customobject;

import java.util.Base64;
import org.apache.datasketches.frequencies.LongsSketch;


public class SerializedFrequentLongsSketch implements Comparable {
  private final LongsSketch _sketch;

  public SerializedFrequentLongsSketch(LongsSketch sketch) {
    _sketch = sketch;
  }

  @Override
  public int compareTo(LongsSketch other) {
    // There is no well-defined ordering for these sketches
    // numActiveItems is just a placeholder, which can be changed later
    return _sketch.getNumActiveItems() - other.getNumActiveItems();
  }

  @Override
  public String toString() {
    return Base64.getEncoder().encodeToString(_sketch.toByteArray());
  }
}