/// <summary>
/// Extracts the filter definition once a leaf is found.
/// </summary>
/// <param name="info">QueryInformation being filled.</param>
/// <param name="binaryNode">BinaryOperatorNode the leaf belongs to.</param>
/// <param name="constantNode">ConstantNode with the parameter definition.</param>
private void ProcessLeafNode(QueryInformation info, BinaryOperatorNode binaryNode, ConstantNode constantNode)
{
try
{
// Necesary variables
SingleValuePropertyAccessNode propertyAccessNode = binaryNode.Left as SingleValuePropertyAccessNode;
SingleValueFunctionCallNode functioncall = binaryNode.Left as SingleValueFunctionCallNode;
// The filter definition that is going to be added.
FilterParameterDefinition filterdefinition = new FilterParameterDefinition();
// Populating common values.
filterdefinition.FilteringOperator = (FilteringOperator)binaryNode.OperatorKind;
filterdefinition.StringValue = constantNode.Value.ToString();
if (functioncall != null)
{
// it contains a function call
propertyAccessNode = ParseFunctionCall(propertyAccessNode, functioncall, filterdefinition);
}
if (propertyAccessNode != null)
{
//it is a simple equals
ParsePropertyAccessNode(info, propertyAccessNode, filterdefinition);
}
}
catch (Exception ex)
{
LogException(ex);
}
}
/// <summary>
/// Gets the SingleValuePropertyAccessNode from a function call.
/// </summary>
/// <param name="propertyAccessNode">Property access node the function call belongs to.</param>
/// <param name="functioncall">Function call being parsed.</param>
/// <param name="filterdefinition">Filter definition being filled.</param>
/// <returns>A SingleValuePropertyAccessNode to be parsed.</returns>
private static SingleValuePropertyAccessNode ParseFunctionCall(SingleValuePropertyAccessNode propertyAccessNode, SingleValueFunctionCallNode functioncall, FilterParameterDefinition filterdefinition)
{
StringBuilder builder = new StringBuilder();
var argumentEnumerator = functioncall.Arguments.GetEnumerator();
filterdefinition.Modifiers = functioncall.Name;
argumentEnumerator.MoveNext();
propertyAccessNode = argumentEnumerator.Current as SingleValuePropertyAccessNode;
return(propertyAccessNode);
}
/// <summary>
/// Parses a Property access node.
/// </summary>
/// <param name="info">QueryInformation being filled.</param>
/// <param name="propertyAccessNode">Property access node to be parsed.</param>
/// <param name="filterdefinition">Filter definition being filled.</param>
private static void ParsePropertyAccessNode(QueryInformation info, SingleValuePropertyAccessNode propertyAccessNode, FilterParameterDefinition filterdefinition)
{
filterdefinition.FieldName = propertyAccessNode.Property.Name;
info.FilterParameters.Add(filterdefinition);
}
