private bool EvaluateOperatorMethod(MethodCallExpression node)
{
if (node.Method.DeclaringType != typeof(CqlOperator))
{
return(false);
}
var column = _pocoData.GetColumnByMemberName(_currentBindingName.Get());
object value = Expression.Lambda(node.Arguments[0]).Compile().DynamicInvoke();
ExpressionType expressionType;
switch (node.Method.Name)
{
case "Append":
expressionType = ExpressionType.AddAssign;
break;
case "Prepend":
expressionType = ExpressionType.PreIncrementAssign;
break;
case "SubstractAssign":
expressionType = ExpressionType.SubtractAssign;
break;
default:
return(false);
}
_projections.Add(Tuple.Create(column.ColumnName, value, expressionType));
return(true);
}
/// <summary>
/// Tries to evaluate the current expression and add it as a projection
/// </summary>
private Expression AddProjection(Expression node, PocoColumn column = null)
{
object value;
if (node is MemberExpression)
{
value = GetClosureValue((MemberExpression)node);
}
else
{
value = Expression.Lambda(node).Compile().DynamicInvoke();
}
if (column == null)
{
column = _pocoData.GetColumnByMemberName(_currentBindingName.Get());
if (column == null)
{
throw new CqlLinqNotSupportedException(node, _parsePhase.Get());
}
}
_projections.Add(Tuple.Create(column, value, ExpressionType.Assign));
return(node);
}