IntegerChromosome.cs

using GeneticSharp.Domain.Randomizations;
using System.Collections;
using System.Linq;

namespace GeneticSharp.Domain.Chromosomes
{
	/// <summary>
	/// Integer chromosome with binary values (0 and 1).
	/// </summary>
	public class IntegerChromosome : BinaryChromosomeBase
	{
		private int m_minValue;
		private int m_maxValue;
		private BitArray m_originalValue;

		/// <summary>
		/// Initializes a new instance of the <see cref="T:GeneticSharp.Domain.Chromosomes.IntegerChromosome"/> class.
		/// </summary>
		/// <param name="minValue">Minimum value.</param>
		/// <param name="maxValue">Maximum value.</param>
		public IntegerChromosome(int minValue, int maxValue) : base(32)
		{
			m_minValue = minValue;
			m_maxValue = maxValue;
			var intValue = RandomizationProvider.Current.GetInt(m_minValue, m_maxValue);
			m_originalValue = new BitArray(new int[] { intValue });

			CreateGenes();
		}

		#region implemented abstract members of ChromosomeBase
		/// <summary>
		/// Generates the gene.
		/// </summary>
		/// <returns>The gene.</returns>
		/// <param name="geneIndex">Gene index.</param>
		public override Gene GenerateGene(int geneIndex)
		{
			var value = m_originalValue[geneIndex];

			return new Gene(value);
		}

		/// <summary>
		/// Creates the new.
		/// </summary>
		/// <returns>The new.</returns>
		public override IChromosome CreateNew()
		{
			return new IntegerChromosome(m_minValue, m_maxValue);
		}

		#endregion

		/// <summary>
		/// Converts the chromosome to its integer representation.
		/// </summary>
		/// <returns>The integer.</returns>
		public int ToInteger()
		{
			var array = new int[1];
			var genes = GetGenes().Select(g => (bool)g.Value).ToArray();
			var bitArray = new BitArray(genes);
			bitArray.CopyTo(array, 0);

			return array[0];
		}
	}
}