public object SearchScalar(string query)
{
string typeName, primaryKeyName, primaryKeyStrValue;
if (_query_process(query, out typeName, out primaryKeyName, out primaryKeyStrValue))
{
Type t = _get_type_by_name(typeName);
ClassInfo schemeInfo = m_catalogTree.Search(t.FullName);
if (schemeInfo != null)
{
object keyValue = Types.GetValue(primaryKeyStrValue, Types.GetInternalType(Types.GetClassFieldType(t, primaryKeyName)));
OOD.Imp.Storage.ObjectTree ot = _get_object_tree(schemeInfo.TopNodeSId);
ObjectInfo oInfo = ot.SearchObject(keyValue);
if (oInfo != null)
{
object result = _get_object_from_storage(oInfo, primaryKeyName, t, schemeInfo);
return(result);
}
else
{
return(null);
}
}
else
{
return(null);
}
}
else
{
return(null);
}
}
/**** User related operations *****/
public void Put(object persistentObject)
{
System.Type t = persistentObject.GetType();
string primaryKeyName = _get_primary_key_name(t);
ClassInfo schemeInfo = SearchClassInfo(t.FullName);
uint cid = 0;
uint topNodeSid = 0;
if (schemeInfo == null)
{
//insert it first
InsertClassIno(t.FullName, _get_other_fields_name(t, primaryKeyName), ref cid, ref topNodeSid);
schemeInfo = new ClassInfo(cid, t.FullName, _get_other_fields_name(t, primaryKeyName), topNodeSid);
}
else
{
cid = schemeInfo.CId;
topNodeSid = schemeInfo.TopNodeSId;
}
Debug.Assert(topNodeSid > 0);
OOD.Imp.Storage.ObjectTree ot = _get_object_tree(topNodeSid);
//get the primary key value
object keyValue = new object();
//get the serialzed all othe fieldValues
string[] otherFields;
_get_data_for_storage(persistentObject, primaryKeyName, schemeInfo.FieldNames, out keyValue, out otherFields);
Debug.Assert(otherFields != null);
if (ot.InsertObject(keyValue, otherFields) == false)
{
throw new OOD.Exception.DuplicatedPrimaryKey(
this,
"primary key is dupicated, insertion failed.");
}
if (topNodeSid != ot.TopNodeSId)
{
//update the top node segment id needed
m_catalogTree.UpdateTopNodeSId(t.FullName, ot.TopNodeSId);
}
}
public ObjectTree _get_object_tree(uint topNodeSId)
{
if (!m_objectTreeCache.Exists(topNodeSId))
{
ObjectTree ot = new ObjectTree(topNodeSId, m_dbSegmentManager);
m_objectTreeCache.Insert(topNodeSId, ot);
}
return (ObjectTree)m_objectTreeCache.Retrive(topNodeSId);
}