public virtual string BuildCaml(ComplexExpression complexExpression)
{
if (complexExpression.Expressions.Count == 1)
{
return(BuildCaml(complexExpression.Expressions[0]));
}
if (complexExpression.Expressions.Count == 0)
{
throw new InvalidOperationException("Отсутствуют дочерние выражения");
}
if (complexExpression.Operator == Operator.Nothing)
{
throw new InvalidOperationException("Недопустимое значение оператора");
}
string template = "<{0}>{1}{2}</{0}>";
string result = BuildCaml(complexExpression.Expressions[0]);
for (int index = 1; index < complexExpression.Expressions.Count; index++)
{
result = string.Format(CultureInfo.CurrentCulture, template, complexExpression.Operator.ToString(), result, BuildCaml(complexExpression.Expressions[index]));
}
return(result);
}
public static ComplexExpression CreateExpression(IExpression expr1, IExpression expr2, Operator op)
{
ComplexExpression expr = new ComplexExpression();
expr.Operator = op;
expr.Expressions.Add(expr1);
expr.Expressions.Add(expr2);
return(expr);
}
public static ComplexExpression operator *(MembershipFilter filter1, IExpression filter2)
{
return(ComplexExpression.CreateExpression(filter1, filter2, Operator.And));
}
public static ComplexExpression operator +(Filter filter1, Filter filter2)
{
return(ComplexExpression.CreateExpression(filter1, filter2, Operator.Or));
}