public void AddAlias(Guid dlId, string parentColumn, string parentNamespace, string childColumn, out ErrorResultTO errors)
{
errors = new ErrorResultTO();
// TODO : This needs to change so we can track at all levels what the root alias is ;)
IDataListCompiler compiler = DataListFactory.CreateDataListCompiler();
Guid masterId = dlId;
string masterRs = parentNamespace;
string masterCol = parentColumn;
Guid searchId = dlId;
IBinaryDataListEntry masterEntry = null;
int aliasSearchRounds = 0;
BinaryDataListAlias binaryDataListAlias = null;
while (searchId != Guid.Empty)
{
ErrorResultTO invokeErrors;
var bdl = compiler.FetchBinaryDataList(searchId, out invokeErrors);
errors.MergeErrors(invokeErrors);
if (bdl != null)
{
string error;
bdl.TryGetEntry(masterRs, out masterEntry, out error);
errors.AddError(error);
if (masterEntry != null)
{
var aliases = masterEntry.FetchAlias();
if (aliases.TryGetValue(masterCol, out binaryDataListAlias))
{
// we have a hit ;)
masterId = binaryDataListAlias.MasterKeyID;
searchId = masterId;
masterRs = binaryDataListAlias.MasterNamespace;
masterCol = binaryDataListAlias.MasterColumn;
aliasSearchRounds++;
}
else
{
// ensure we copy over the alias entry's keys ;)
if (IsEmtpy)
{
var keyItr = masterEntry.FetchRecordsetIndexes();
_myKeys = new IndexList(keyItr.FetchGaps(), keyItr.MaxIndex(), keyItr.MinIndex());
IsEmtpy = false;
}
searchId = Guid.Empty; // signal end ;)
}
}
else
{
if (aliasSearchRounds == 0)
{
throw new Exception("Missing Entry");
}
// we hit the bottom earlier, handle it ;)
if (binaryDataListAlias != null)
{
masterEntry = binaryDataListAlias.MasterEntry;
}
searchId = Guid.Empty; // signal end ;)
}
}
else
{
throw new Exception("Missing DataList");
}
}
// Check MasterKeyID to see if it contains an alias, if so keep bubbling until we at end ;)
_keyToAliasMap[childColumn] = new BinaryDataListAlias {
MasterKeyID = masterId, ChildKey = GenerateKeyPrefix(Namespace, DataListKey), MasterKey = GenerateKeyPrefix(masterRs, masterId), MasterColumn = masterCol, MasterNamespace = masterRs, MasterEntry = masterEntry
};
}
