/// <summary>
/// This method tries to pull out the index name from
/// a given field expression.
/// </summary>
/// <param name="exprTree">the original expression tree</param>
/// <param name="fieldExpr">the field expression that should
/// contain the indexed field</param>
/// <returns></returns>
private static string GetIndexName(LambdaExpression exprTree, Type iGrainType, Expression fieldExpr)
{
ParameterExpression iGrainParam = exprTree.Parameters[0];
if (fieldExpr is MemberExpression)
{
Expression innerFieldExpr = ((MemberExpression)fieldExpr).Expression;
if ((innerFieldExpr.NodeType == ExpressionType.Parameter && innerFieldExpr.Equals(iGrainParam)) ||
(innerFieldExpr.NodeType == ExpressionType.Convert && ((UnaryExpression)innerFieldExpr).Operand.Equals(iGrainParam)))
{
return(IndexUtils.GetIndexNameOnInterfaceGetter(iGrainType, ((MemberExpression)fieldExpr).Member.Name));
}
}
throw new NotSupportedException(string.Format("The provided expression is not supported yet: {0}", exprTree));
}
