/// <summary>
/// Gets the custom value for a Property that is decorated with a derived attribute
/// </summary>
/// <param name="originalObject">the original object that is applied to a viewmodel</param>
/// <param name="requestInstance"></param>
/// <returns>the value to assign to the target-property on a viewmodel</returns>
protected override object GetCustomValueFor(object originalObject, Func <Type, object> requestInstance)
{
var dbContext = ContextHelper.GetDbContextFromEntity(originalObject);
if (dbContext == null)
{
dbContext = (DbContext)requestInstance(typeof(DbContext));
}
if (dbContext != null)
{
var src = originalObject;
if (DeciderMode != DeciderMode.This)
{
src = ExpressionParser.Parse(PropertyName, originalObject);
}
var deciderName = DeciderName;
int deciderId = -1;
Type entityType = typeof(object);
string table = null, schema = null;
if (string.IsNullOrEmpty(deciderName) && src != null)
{
table = dbContext.GetTableName(src.GetType(), out entityType, out schema);
string fqName = $"[{schema}].[{table}]";
var td = dbContext.Set <TableDecider>().FirstOrDefault(n => n.TableName == fqName);
deciderId = td?.DeciderId ?? -1;
}
else
{
deciderId = dbContext.Set <Decider>().FirstOrDefault(n => n.DisplayName == deciderName)?.DeciderId ?? -1;
}
if (deciderId != -1)
{
IConstraintFactory factory = RepoConstraintsInitializer.GetFactory(dbContext);
var deciderRecord = dbContext.Set <Decider>().First(n => n.DeciderId == deciderId);
var decider = GetSimpleDecider(deciderRecord, entityType, factory, table, schema, (s, t) => { return(null); });
DeciderResult retVal = new DeciderResult();
retVal.Result = decider.Decide(src, DecisionMethod.Full, out var msg);
retVal.Messages = msg;
return(retVal);
}
if (src == null)
{
return(new DeciderResult {
Messages = EntityNullMessage, Result = EntityNullResult
});
}
LogEnvironment.LogDebugEvent(null, "No capable decider was found.", (int)LogSeverity.Warning, null);
return(null);
}
LogEnvironment.LogDebugEvent(null, "Unable to resolve the DbContext for provided model.", (int)LogSeverity.Warning, null);
return(null);
}
/// <summary>
/// Refreshes the constraints that are registered in this Factory
/// </summary>
private void RefreshConstraints()
{
DbContext repo;
using (contextProvider.AcquireContext(out repo))
{
RepoConstraintsInitializer.InitializeConstraints(this, this.Factory, repo);
}
}