private DataLayers GetDataLayers()
{
DataLayers dataLayers = new DataLayers();
// Load NHibernate data layer
Type nhType = typeof(NHibernateDataLayer);
string nhLibrary = nhType.Assembly.GetName().Name;
string nhAssembly = string.Format("{0}, {1}", nhType.FullName, nhLibrary);
DataLayer nhDataLayer = new DataLayer {
Assembly = nhAssembly, Name = nhLibrary, Configurable = true
};
dataLayers.Add(nhDataLayer);
// Load Spreadsheet data layer
Type ssType = typeof(SpreadsheetDatalayer);
string ssLibrary = ssType.Assembly.GetName().Name;
string ssAssembly = string.Format("{0}, {1}", ssType.FullName, ssLibrary);
DataLayer ssDataLayer = new DataLayer {
Assembly = ssAssembly, Name = ssLibrary, Configurable = true
};
dataLayers.Add(ssDataLayer);
try
{
Assembly[] domainAssemblies = AppDomain.CurrentDomain.GetAssemblies();
GetDataLayerTypes(ref dataLayers, domainAssemblies);
}
catch (Exception ex)
{
_logger.Error(string.Format("Error loading data layer: {0}" + ex));
}
return(dataLayers);
}
private void GetDataLayerTypes(ref DataLayers dataLayers, Assembly[] domainAssemblies)
{
foreach (Assembly asm in domainAssemblies)
{
Type[] asmTypes = null;
try
{
asmTypes = asm.GetTypes().Where(a => a != null && (
(typeof(IDataLayer).IsAssignableFrom(a) && !(a.IsInterface || a.IsAbstract)) ||
(typeof(ILightweightDataLayer).IsAssignableFrom(a) && !(a.IsInterface || a.IsAbstract)))
).ToArray();
}
catch (ReflectionTypeLoadException e)
{
// if we are running the the iRing site under Anonymous authentication with the DefaultApplicationPool Identity we
// can run into ReflectionPermission issues but as our datalayer assemblies are in our web site's bin folder we
// should be able to ignore the exceptions and work with the accessibe types loaded in e.Types.
asmTypes = e.Types.Where(a => a != null && (
(typeof(IDataLayer).IsAssignableFrom(a) && !(a.IsInterface || a.IsAbstract)) ||
(typeof(ILightweightDataLayer).IsAssignableFrom(a) && !(a.IsInterface || a.IsAbstract)))
).ToArray();
_logger.Warn("GetTypes() for " + asm.FullName + " cannot access all types, but datalayer loading is continuing: " + e);
}
try
{
if (asmTypes.Any())
{
_logger.Debug("assembly:" + asm.FullName);
foreach (System.Type asmType in asmTypes)
{
_logger.Debug("asmType:" + asmType.ToString());
bool isLW = typeof(ILightweightDataLayer).IsAssignableFrom(asmType) && !(asmType.IsInterface || asmType.IsAbstract);
bool configurable = asmType.BaseType.Equals(typeof(BaseConfigurableDataLayer));
string name = asm.FullName.Split(',')[0];
if (name.ToLower() == "NHibernateExtension".ToLower())
{
continue;
}
if (!dataLayers.Exists(x => x.Name.ToLower() == name.ToLower()))
{
string assembly = string.Format("{0}, {1}", asmType.FullName, name);
DataLayer dataLayer = new DataLayer
{
Assembly = assembly,
Name = name,
IsLightweight = isLW,
Configurable = configurable
};
dataLayers.Add(dataLayer);
}
}
}
}
catch (Exception e)
{
_logger.Error("Error loading data layer (while getting assemblies): " + e);
}
}
}
