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A module that is everything required to understands Druid Segments

There is a newer version: 30.0.1

/*
 * 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.druid.collections.spatial;

import org.apache.druid.collections.bitmap.BitmapFactory;
import org.apache.druid.collections.bitmap.MutableBitmap;

import java.util.ArrayList;
import java.util.List;

/**
 */
public class Point extends Node
{
  private final float[] coords;
  private final MutableBitmap bitmap;

  public Point(float[] coords, int entry, BitmapFactory bitmapFactory)
  {
    super(
        coords,
        coords.clone(),
        null,
        true,
        null,
        makeBitmap(entry, bitmapFactory)
    );

    this.coords = coords;
    this.bitmap = bitmapFactory.makeEmptyMutableBitmap();
    this.bitmap.add(entry);
  }

  public Point(float[] coords, MutableBitmap entry)
  {
    super(coords, coords.clone(), null, true, null, entry);

    this.coords = coords;
    this.bitmap = entry;
  }

  private static MutableBitmap makeBitmap(int entry, BitmapFactory bitmapFactory)
  {
    MutableBitmap retVal = bitmapFactory.makeEmptyMutableBitmap();
    retVal.add(entry);
    return retVal;
  }

  public float[] getCoords()
  {
    return coords;
  }

  @Override
  public MutableBitmap getBitmap()
  {
    return bitmap;
  }

  @Override
  public void addChild(Node node)
  {
    throw new UnsupportedOperationException();
  }

  @Override
  public List getChildren()
  {
    return new ArrayList<>();
  }

  @Override
  public boolean isLeaf()
  {
    return true;
  }

  @Override
  public double getArea()
  {
    return 0;
  }

  @Override
  public boolean enclose()
  {
    return false;
  }
}