public void Construct(ApplicationFieldDefinition field, DataMap dataMap, Action <Result> onCompletion, IEnumerable <FilterExpression> adHocFilters)
{
if (field == null)
{
throw new ArgumentNullException("field");
}
if (dataMap == null)
{
throw new ArgumentNullException("dataMap");
}
if (onCompletion == null)
{
throw new ArgumentNullException("onCompletion");
}
if (adHocFilters == null)
{
throw new ArgumentNullException("adHocFilters");
}
_field = field;
_widget = (LookupWidget)field.Widget();
_dataMap = dataMap;
_onCompletion = onCompletion;
_filters = InitializeFilters(_dataMap, _widget, adHocFilters);
}
public Result(ApplicationFieldDefinition field, LookupWidget widget, DataMap dataMap)
{
_field = field;
_widget = widget;
_dataMap = dataMap;
}
private static IEnumerable <FilterExpression> InitializeFilters(DataMap dataMap, LookupWidget widget, IEnumerable <FilterExpression> adHocFilters)
{
var filters = new List <FilterExpression>();
// Handles the metadata filters, which
// can be either literals ("hardcoded")
// or based on the data map current state.
foreach (var filter in widget.Filters)
{
var value = string.IsNullOrEmpty(filter.Literal)
? dataMap.Value(filter.TargetField)
: filter.Literal;
filters.Add(new Exactly(filter.SourceField, value));
}
// Now let's append all ad-hoc filter.
filters.AddRange(adHocFilters);
return(filters);
}
