source: branches/Robocode/HeuristicLab.Problems.Robocode/Symbols/Branches/IfStatement.cs @ 9598

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)
        {
            this.Prefix = "if(";
            this.Suffix = ")";
        }

        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";
        }
    }
}