//HashAlgorithm hash = MD5.Create();
public IDynamicEvaluator GetEvaluator(BuildMethod method)
{
IDynamicEvaluator stored;
int key = method.GetHashCode();//Convert.ToBase64String(hash.ComputeHash(System.Text.Encoding.Unicode.GetBytes(methods.ToString())));
if (evaluators.ContainsKey(key))
{
evaluators.TryGetValue(key, out stored);
}
else
{
stored = new ReflectionEvaluator(method);
evaluators.Add(key, stored);
}
return stored;
}
private Expression EvaluateSubtree(Expression subtree)
{
subtree = ReflectionEvaluator.Evaluate(subtree);
if (subtree.NodeType == ExpressionType.Constant)
{
// we don't want to partially evaluate constants...
var constant = (ConstantExpression)subtree;
var queryableValue = constant.Value as IQueryable;
if (queryableValue != null && queryableValue.Expression != constant)
{
return(queryableValue.Expression);
}
return(subtree);
}
Expression <Func <object> > lambda = Expression.Lambda <Func <object> >(Expression.Convert(subtree, typeof(object)));
var compiledLambda = lambda.Compile();
return(Expression.Constant(compiledLambda(), subtree.Type));
}
public static Expression Evaluate(Expression node)
{
var evaluator = new ReflectionEvaluator();
return(evaluator.Visit(node));
}
public static Expression Evaluate(Expression node)
{
var evaluator = new ReflectionEvaluator();
return evaluator.Visit(node);
}
