public Type GetByType(Type type, SoftwareVersion version)
{
Type returnType = null;
// Type type = typeof(T);
VersionLookup versionLookup;
try
{
if (!_TypeLookup.TryGetValue(type, out versionLookup))
{
_typeLock.Lock();
versionLookup = new VersionLookup();
_TypeLookup.Add(type, versionLookup);
List <Type> types = new List <Type>(type.Assembly.GetTypes().Where(asmType => asmType.IsClass && !asmType.IsAbstract && (asmType.IsSubclassOf(type) || asmType == type)));
// Find all descendants
// TODO: Add functionality to add additional assemblies where datasources may be found,
// outside of the assembly containing the base, which is where all searches are currently conducted
foreach (Type subType in types)
{
DatabaseVersionAttribute[] attribs = (DatabaseVersionAttribute[])subType.GetCustomAttributes(typeof(DatabaseVersionAttribute), false);
if (attribs.Length > 0)
{
foreach (DatabaseVersionAttribute attr in attribs)
{
foreach (SoftwareVersion attributeVersion in attr.Versions)
{
if (versionLookup.ContainsKey(attributeVersion))
{
versionLookup[attributeVersion] = subType;
}
else
{
versionLookup.Add(attributeVersion, subType);
}
}
}
}
}
}
}
finally
{
_typeLock.Unlock();
}
// At this point, all versioned types realted to the requested type are indexed by version number in the lookup for this type
if (!versionLookup.TryGetValue(version, out returnType))
{
// Couldn't find an exact match of the datasource requested. Look for the most recent one prior to this database version
SoftwareVersion lastVersion = null;
List <SoftwareVersion> keys = new List <SoftwareVersion>(versionLookup.Keys);
keys.Sort();
keys.Reverse();
foreach (SoftwareVersion key in keys)
{
if (key > version)
{
continue;
}
lastVersion = key;
break;
}
if (lastVersion != null)
{
returnType = versionLookup[lastVersion];
versionLookup.Add(version, returnType);
// Warn if our datasource is not marked for the current version?
}
}
return(returnType);
}
public static void Parse(Token token, ref VCard vcard)
{
string version = token.Values[0];
vcard.Version = VersionLookup.Parse(version);
}
