public static IItemsProvider <T> GetVirtualProvider <T>(this TableInfo tableInfo) where T : class, IFreeDocument
{
var enumable = tableInfo.Connector as IEnumerableProvider <T>;
IItemsProvider <T> vir = null;
if (enumable != null && enumable.CanSkip(tableInfo.Name) == false)
{
vir = new EnumableVirtualProvider <T>(
enumable.GetEnumerable(tableInfo.Name), tableInfo.Size);
}
else
{
vir = new DataBaseVirtualProvider <T>(tableInfo.Connector, tableInfo.Name);
}
return(vir);
}
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);
}
}
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;
}
}
