public bool CheckCamlElement(XElement element, ListItemEmulator item)
{
string operationName = "" + element.Name;
switch (operationName)
{
case "And":
return
(CheckCamlElement(element.Elements().ElementAt(0), item) &&
CheckCamlElement(element.Elements().ElementAt(1), item));
case "Or":
return
(CheckCamlElement(element.Elements().ElementAt(0), item) ||
CheckCamlElement(element.Elements().ElementAt(1), item));
case "IsNull":
case "IsNotNull":
return(CheckCamlNullOperation(element, item));
default:
return(CheckCamlCompareOperation(element, item));
}
return(false);
}
private bool CheckCamlNullOperation(XElement element, ListItemEmulator listItem)
{
var fieldName = "" + element.Element("FieldRef").Attribute("Name");
var fieldValue = listItem[fieldName];
if (element.Name == "IsNull")
{
return(fieldValue == null);
}
if (element.Name == "IsNotNull")
{
return(fieldValue != null);
}
return(false);
}
private bool CheckCamlCompareOperation(XElement node, ListItemEmulator listItem)
{
var operation = OperationHelper.ParseOperation(node);
var leftOperand = listItem[operation.FieldName];
var parsedValue = SpecialConvert(operation.ValueType, operation.Value);
var typeFromModel = new ConvertationHelper <T>().GetType(operation.FieldName);
var rightOperand = Convert.ChangeType(parsedValue, typeFromModel);
var operationType = operation.OperationType;
if (operationType == "Contains" || operationType == "BeginsWith" || (operationType == "Eq" && typeFromModel == typeof(string)))
{
if (operationType == "Contains")
{
return(("" + leftOperand).IndexOf("" + rightOperand, StringComparison.OrdinalIgnoreCase) >= 0);
}
if (operationType == "BeginsWith")
{
return(("" + leftOperand).IndexOf("" + rightOperand, StringComparison.OrdinalIgnoreCase) == 0);
}
if (operationType == "Eq")
{
return(("" + leftOperand).ToUpper() == ("" + rightOperand).ToUpper());
}
}
if (operationType == "Eq" || operationType == "Neq")
{
if (operationType == "Eq")
{
return(rightOperand.Equals(leftOperand));
}
else
{
return(!rightOperand.Equals(leftOperand));
}
}
else
{
var rightComparible = (IComparable)rightOperand;
var index = rightComparible.CompareTo(leftOperand);
if (operationType == "Gt")
{
return(index < 0);
}
if (operationType == "Geq")
{
return(index <= 0);
}
if (operationType == "Lt")
{
return(index > 0);
}
if (operationType == "Leq")
{
return(index >= 0);
}
}
return(false);
}
public bool CheckWhere(ListItemEmulator item)
{
return(CheckCamlElement(where, item));
}