source: branches/Robocode/HeuristicLab.Problems.Robocode/Symbols/Branches/IfStatement.cs @ 11813

using HeuristicLab.Common;
using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.Problems.Robocode {
  [StorableClass]
  public class IfStatement : CodeNode {
    public override int MinimumArity { get { return 2; } }
    public override int MaximumArity { get { return 3; } }

    [Storable]
    public override string Prefix { get; set; }

    [Storable]
    public override string Suffix { get; set; }

    [StorableConstructor]
    private IfStatement(bool deserializing) : base(deserializing) { }
    private IfStatement(IfStatement original, Cloner cloner)
      : base(original, cloner) {
    }

    public IfStatement()
      : base("IfStatement", "An IfStatement.") {
      this.Prefix = "if(";
      this.Suffix = ")";
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      return new IfStatement(this, cloner);
    }

    public override string Interpret(ISymbolicExpressionTreeNode node, System.Collections.Generic.IEnumerable<ISymbolicExpressionTreeNode> children) {
      string condition = "", ifTrue = "", ifElse = "";
      foreach (ISymbolicExpressionTreeNode c in children) {
        if (c.Symbol is LogicalExpression)
          condition = ((CodeNode)c.Symbol).Interpret(c, c.Subtrees);
        else if (c.Symbol is Block)
          ifTrue = ((CodeNode)c.Symbol).Interpret(c, c.Subtrees);
        else if (c.Symbol is ElseStatement || c.Symbol is DoNothing)
          ifElse = ((CodeNode)c.Symbol).Interpret(c, c.Subtrees);
        else
          throw new System.Exception("Unexpected Child node.");
      }
      return this.Prefix + " " + condition + " " + this.Suffix +
          "\r\n" + ifTrue + "\r\n" + ifElse + "\r\n";
    }
  }
}