public override IEnumerable<FreeDocument> Generate(IFreeDocument document = null)
{
var mount = 0;
if (Mount < 0)
mount = int.MaxValue;
TableInfo table = TableNames.SelectItem;
if (table != null)
{
var con = new VirtualDataCollection(table.GetVirtualProvider<IFreeDocument>());
foreach (var item in con.ComputeData.Skip(Position).Take(mount).Select(d => d.DictSerialize()))
{
yield return item;
}
}
}
public DataCollection ReadCollection(IDataBaseConnector connector, string tableName, bool isVirtual)
{
if (isVirtual)
{
IItemsProvider<IFreeDocument> vir = null;
TableInfo tableInfo = connector.RefreshTableNames().FirstOrDefault(d => d.Name == tableName);
var enumable = connector as IEnumerableProvider<IFreeDocument>;
if (enumable != null && enumable.CanSkip(tableInfo.Name) == false)
{
vir = new EnumableVirtualProvider<IFreeDocument>(
enumable.GetEnumerable(tableInfo.Name), tableInfo.Size);
}
else
{
vir = new DataBaseVirtualProvider<IFreeDocument>(tableInfo.Connector, tableInfo.Name);
}
int count = 1000;
if (connector.TypeName == "网页爬虫连接器")
count = 100;
var col = new VirtualDataCollection( vir, count)
{
Name = tableInfo.Name
};
AddDataCollection(col);
return col;
}
else
{
Task<List<IFreeDocument>> datas = GetDataFromDB(connector, tableName, true);
DataCollection col = AddDataCollection(datas.Result);
return col;
}
}