private IEnumerable <SearchIndexEntry> ProcessCompositeSearchParameter(SearchParameter searchParameter, Base resource, FhirEvaluationContext context)
{
Debug.Assert(searchParameter?.Type == SearchParamType.Composite, "The search parameter must be composite.");
SearchParameterInfo compositeSearchParameterInfo = searchParameter.ToInfo();
IEnumerable <Base> rootObjects = resource.Select(searchParameter.Expression, context);
foreach (var rootObject in rootObjects)
{
int numberOfComponents = searchParameter.Component.Count;
bool skip = false;
var componentValues = new IReadOnlyList <ISearchValue> [numberOfComponents];
// For each object extracted from the expression, we will need to evaluate each component.
for (int i = 0; i < numberOfComponents; i++)
{
SearchParameter.ComponentComponent component = searchParameter.Component[i];
// First find the type of the component.
SearchParameter componentSearchParameterDefinition = _searchParameterDefinitionManager.GetSearchParameter(component.Definition.Url);
IReadOnlyList <ISearchValue> extractedComponentValues = ExtractSearchValues(
componentSearchParameterDefinition.Url,
componentSearchParameterDefinition.Type.Value,
componentSearchParameterDefinition.Target,
rootObject,
component.Expression,
context);
// Filter out any search value that's not valid as a composite component.
extractedComponentValues = extractedComponentValues
.Where(sv => sv.IsValidAsCompositeComponent)
.ToArray();
if (!extractedComponentValues.Any())
{
// One of the components didn't have any value and therefore it will not be indexed.
skip = true;
break;
}
componentValues[i] = extractedComponentValues;
}
if (skip)
{
continue;
}
yield return(new SearchIndexEntry(compositeSearchParameterInfo, new CompositeSearchValue(componentValues)));
}
}
public static Uri GetComponentDefinitionUri(this SearchParameter.ComponentComponent component)
{
return(component?.Definition?.Url);
}
public static Uri GetComponentDefinitionUri(this SearchParameter.ComponentComponent component)
{
return(!string.IsNullOrEmpty(component.Definition) ? new Uri(component.Definition) : null);
}
