protected override CamlExpression VisitWhereUnaryComparisonExpression(CamlWhereUnaryComparisonExpression expression)
{
CamlLateBoundExpression lateBoundCond = expression as CamlLateBoundExpression;
if (lateBoundCond != null)
{
return(lateBoundCond.Bind(this.Bindings));
}
return(base.VisitWhereUnaryComparisonExpression(expression));
}
protected override CamlExpression VisitWhereUnaryComparisonExpression(CamlWhereUnaryComparisonExpression expression)
{
if (expression.Operator == CamlUnaryOperator.IsNull || expression.Operator == CamlUnaryOperator.IsNotNull)
{
if (transformFields.Contains(expression.FieldName.Bind(this.Bindings)))
{
return(UpdateExpression(expression, expression.FieldName, expression.Operator == CamlUnaryOperator.IsNull));
}
}
return(expression);
}
/// <summary>
/// Called when visiting a unary comparison expression inside a <Where/> element.
/// </summary>
/// <param name="expression">An instance of the <see cref="CamlWhereUnaryComparisonExpression"/> class representing the unary comparison expression.</param>
/// <returns>When overriden, returns an expression to replace the expression given in arguments.</returns>
protected virtual CamlExpression VisitWhereUnaryComparisonExpression(CamlWhereUnaryComparisonExpression expression)
{
return(expression);
}
protected override CamlExpression VisitWhereUnaryComparisonExpression(CamlWhereUnaryComparisonExpression expression)
{
throw new NotSupportedException(String.Format("Unsupported {0} unary operator", expression.Operator));
}
protected override CamlExpression VisitWhereUnaryComparisonExpression(CamlWhereUnaryComparisonExpression expression)
{
return(IsFieldAllowed(expression.FieldName.Bind(this.Bindings)) ? expression : Caml.False);
}
