public DataSet GetDataSet()
{
ConstDataSetPoolEntry poolEntry = null;
if (!globalPool.TryGetValue(DataSetXml, out poolEntry))
{
poolEntry = new ConstDataSetPoolEntry()
{
OriginalDataSet = LoadDataSetFromXml(),
Pool = new ConcurrentBag <ConstDataSet>()
};
globalPool[DataSetXml] = poolEntry;
}
if (ReadOnly)
{
ConstDataSet constDs = null;
if (!poolEntry.Pool.TryTake(out constDs))
{
constDs = (ConstDataSet)poolEntry.OriginalDataSet.Copy();
newInstanceCount++;
constDs.MakeReadOnlyColumns();
constDs.SubscribeOnChangeEvents();
}
localInstances.Add(constDs);
return(constDs);
}
else
{
// global pool is not used in this case
var ds = poolEntry.OriginalDataSet.Copy();
newInstanceCount++;
return(ds);
}
}
internal ConstDataSet LoadDataSetFromXml()
{
var ds = new ConstDataSet();
ds.ReadXml(new StringReader(DataSetXml), XmlReadMode.Auto);
if (DataSetFactory != null)
{
var dsWithSchema = new ConstDataSet();
foreach (DataTable t in ds.Tables)
{
var schemaTblName = t.TableName;
if (SchemaMapping.ContainsKey(schemaTblName))
{
schemaTblName = SchemaMapping[schemaTblName];
}
var tblDs = DataSetFactory.GetDataSet(schemaTblName);
if (tblDs != null)
{
var schemaTbl = tblDs.Tables[schemaTblName].Clone();
schemaTbl.TableName = t.TableName;
dsWithSchema.Tables.Add(schemaTbl);
}
}
dsWithSchema.ReadXml(new StringReader(DataSetXml), XmlReadMode.Auto);
}
return(ds);
}
