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/*
 * Copyright (c) 1998-2018 University Corporation for Atmospheric Research/Unidata
 * See LICENSE for license information.
 */
package ucar.units;

/**
 * Provides support for an unknown base quantity.
 * 
 * @author Steven R. Emmerson
 */
public final class UnknownBaseQuantity extends BaseQuantity {
  private static final long serialVersionUID = 1L;

  /**
   * Constructs from nothing.
   */
  protected UnknownBaseQuantity() {
    super("Unknown", "x", true);
  }

  /**
   * Indicates if this quantity is semantically the same as an object. Unknown
   * quantities are never equal by definition -- not even to itself.
   * 
   * @param object
   *        The object.
   * @return false always.
   */
  @Override
  public boolean equals(final Object object) {
    return false;
  }

  /**
   * Returns the hash code of this instance.
   * 
   * @return The hash code of this instance.
   */
  @Override
  public int hashCode() {
    return System.identityHashCode(this);
  }

  /**
   * Indicates if this quantity is dimensionless. Unknown quantities are never
   * dimensionless by definition.
   * 
   * @return false always.
   */
  @Override
  public boolean isDimensionless() {
    return false;
  }
}