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API to query the OpenStreetMap History Database. Includes MapReduce functionality to filter, analyze and aggregate data.

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package org.heigit.ohsome.oshdb.api.generic;

import java.io.Serializable;
import org.jetbrains.annotations.NotNull;

/**
 * A utility class for common numeric operations on arbitrary number types.
 */
public class NumberUtils implements Serializable {
  private NumberUtils() {}

  /**
   * Add two numeric values and return the sum in the smallest common type.
   *
   * Supports Integer, Float and Double values
   *
   * @param x a numeric value
   * @param y a numeric value
   * @param  a numeric data type
   * @return the sum of x and y
   */
  @SuppressWarnings("unchecked") // manual type checking is performed in method body
  @NotNull
  public static  T add(T x, T y) {
    if (x instanceof Integer && y instanceof Integer) {
      return (T) (Integer) (x.intValue() + y.intValue());
    } else if (x instanceof Float && (y instanceof Float || y instanceof Integer)) {
      return (T) (Float) (x.floatValue() + y.floatValue());
    } else {
      return (T) (Double) (x.doubleValue() + y.doubleValue());
    }
  }
}