package jalview.datamodel;

/**
 * An enumeration of the kinds of mapping (from nucleotide or peptide, to
 * nucleotide or peptide), and the corresponding word lengths
 */
public enum MappingType
{
  NucleotideToPeptide(3, 1)
  {
    @Override
    public MappingType getInverse()
    {
      return PeptideToNucleotide;
    }
  },
  PeptideToNucleotide(1, 3)
  {
    @Override
    public MappingType getInverse()
    {
      return NucleotideToPeptide;
    }
  },
  NucleotideToNucleotide(1, 1)
  {
    @Override
    public MappingType getInverse()
    {
      return NucleotideToNucleotide;
    }
  },
  PeptideToPeptide(1, 1)
  {
    @Override
    public MappingType getInverse()
    {
      return PeptideToPeptide;
    }
  };

  private int fromRatio;

  private int toRatio;

  private MappingType(int fromSize, int toSize)
  {
    fromRatio = fromSize;
    toRatio = toSize;
  }

  public abstract MappingType getInverse();

  public int getFromRatio()
  {
    return fromRatio;
  }

  public int getToRatio()
  {
    return toRatio;
  }
}