Promoter.execNode C# (CSharp) Method

    private float execNode(TreeNode<PromoterNodeData> node, ArrayList molecules)
    {
        if (node != null)
          {
        if (node.getData().token == PromoterParser.eNodeType.OR)
          return Math.Max(execNode(node.getLeftNode(), molecules), execNode(node.getRightNode(), molecules));
        else if (node.getData().token == PromoterParser.eNodeType.AND)
          return Math.Min(execNode(node.getLeftNode(), molecules), execNode(node.getRightNode(), molecules));
        else if (node.getData().token == PromoterParser.eNodeType.NOT)
          return 1f - execNode(node.getLeftNode(), molecules);
        else if (node.getData().token == PromoterParser.eNodeType.CONSTANT)
          return execConstant(node, molecules);
        else if (node.getData().token == PromoterParser.eNodeType.BOOL)
          return execBool(node);
        else if (node.getData().token == PromoterParser.eNodeType.WORD)
          {
            Molecule mol = ReactionEngine.getMoleculeFromName(node.getData().value, molecules);
            if (mol != null)
              return mol.getConcentration();
          }
        else if (node.getData().token == PromoterParser.eNodeType.NUM)
          return float.Parse(node.getData().value.Replace(",", "."));
          }
        return 1.0f;
    }