public static async Task <CompositeDataMap> Expand(ApplicationSchemaDefinition compositeApplication, DataMap compositeDataMap)
{
var repository = new DataRepository();
var components = new List <Component>();
foreach (var composition in compositeApplication.Compositions)
{
var filters = new List <FilterExpression>();
// Handles the composition criteria, which can
// be either literals ("hardcoded") values or
// based on the data map current state.
foreach (var criterion in composition.EntityAssociation.Attributes)
{
var value = string.IsNullOrEmpty(criterion.Literal)
? compositeDataMap.Value(criterion.From)
: criterion.Literal;
filters.Add(new Exactly(criterion.To, value));
}
// Fetches all data maps ("components") that
// satisfies the composition criteria.
var componentApplication = composition.To();
var componentDataMaps = (await repository
.LoadAsync(componentApplication, filters))
.ToList();
components.Add(new Component(componentApplication, componentDataMaps));
}
return(new CompositeDataMap(compositeApplication, compositeDataMap, components));
}
public static string Id(this DataMap dataMap, IApplicationIdentifier application)
{
return(dataMap.Value(application.IdFieldName));
}
public static T Id <T>(this DataMap dataMap, IApplicationIdentifier application)
{
return(dataMap.Value <T>(application.IdFieldName));
}