/// <summary>
/// Predicates for rule.
/// </summary>
/// <param name="condition">The condition.</param>
/// <param name="isResourceCondition">if set to <c>true</c> [is resource condition].</param>
/// <param name="gridResultColumn">The result column.</param>
/// <param name="conditionalFormatter">The conditional formatter column.</param>
/// <returns>Predicate{System.Object}.</returns>
private static Predicate <object> PredicateForRule(Condition condition, bool isResourceCondition, ResultColumn gridResultColumn, ConditionalFormatter conditionalFormatter)
{
try
{
Predicate <object> valueFilterPredicate = BuildValueFilterPredicateNoNulls(condition, gridResultColumn, conditionalFormatter);
return(value =>
{
try
{
// Handle nulls
// for now ANY type of filter on a column will reject null values
if (value == null || value is DBNull)
{
switch (condition.Operator)
{
case ConditionType.NotEqual:
value = "";
break;
case ConditionType.IsNull:
return true;
case ConditionType.IsNotNull:
return false;
case ConditionType.AnyExcept:
return true;
default:
return false;
}
}
// Handle transforms
if (isResourceCondition)
{
var xml = (string)value;
if (condition.Operator == ConditionType.AnyExcept ||
condition.Operator == ConditionType.AnyOf ||
condition.Operator == ConditionType.CurrentUser)
{
value = DatabaseTypeHelper.GetEntityXmlId(xml);
}
else
{
value = DatabaseTypeHelper.GetEntityXmlName(xml);
}
}
// Evaluate the specific predicate
return valueFilterPredicate(value);
}
catch
{
return false;
//throw new Exception( string.Format( "Predicate failed. Data={0} {1}. Expected={2}", value == null ? "null" : value.GetType( ).Name, value, condition.ColumnType ), ex );
}
});
}
catch (ArgumentException)
{
return(null); // argument does not exist .. return null
}
}
