/// <summary>
/// Retrieves data source information.
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
internal DataSourceInfo GetDataSourceInfo(Type type)
{
DataSourceInfo info;
if (type == null)
throw new ArgumentNullException("type");
try
{
CacheManager mappingCache = CacheFactory.GetCacheManager();
if (mappingCache.Contains(string.Format("GetDataSourceInfo({0})", type.FullName)))
return (DataSourceInfo)mappingCache[string.Format("GetDataSourceInfo({0})", type.FullName)];
Debug.WriteLine(string.Format("Getting data source information for type {0}", type.Name));
info = new DataSourceInfo();
DataSourceAttribute[] datasource = (DataSourceAttribute[])type.GetCustomAttributes(typeof(DataSourceAttribute), true);
info.DataSourceName = datasource.Length > 0 ? datasource[0].Name : string.Empty;
// Retrieving table name to map the object in the database.
TableAttribute[] tables = (TableAttribute[])type.GetCustomAttributes(typeof(TableAttribute), true);
info.DeleteCommandName = datasource.Length > 0 &&
!string.IsNullOrEmpty(datasource[0].DeleteCommandName) ?
datasource[0].DeleteCommandName : "Delete" + (tables.Length > 0 &&
!string.IsNullOrEmpty(tables[0].Name) ? tables[0].Name : type.Name);
info.InsertCommandName = datasource.Length > 0 &&
!string.IsNullOrEmpty(datasource[0].InsertCommandName) ?
datasource[0].InsertCommandName : "Insert" + (tables.Length > 0 &&
!string.IsNullOrEmpty(tables[0].Name) ? tables[0].Name : type.Name);
info.UpdateCommandName = datasource.Length > 0 &&
!string.IsNullOrEmpty(datasource[0].UpdateCommandName) ?
datasource[0].UpdateCommandName : "Update" + (tables.Length > 0 &&
!string.IsNullOrEmpty(tables[0].Name) ? tables[0].Name : type.Name);
info.SelectCommandName = datasource.Length > 0 &&
!string.IsNullOrEmpty(datasource[0].SelectCommandName) ?
datasource[0].SelectCommandName : "Select" + (tables.Length > 0 &&
!string.IsNullOrEmpty(tables[0].Name) ? tables[0].Name : type.Name);
info.DataSetAdapterName = datasource.Length > 0 &&
!string.IsNullOrEmpty(datasource[0].DataSetAdapterName) ?
datasource[0].DataSetAdapterName : (tables.Length > 0 &&
!string.IsNullOrEmpty(tables[0].Name) ? tables[0].Name : type.Name) + "Adapter";
mappingCache.Add(string.Format("GetDataSourceInfo({0})", type.FullName), info,
CacheItemPriority.None, null, new SlidingTime(TimeSpan.FromMinutes(15)));
}
catch (Exception ex)
{
throw ex;
}
return info;
}
internal DataObjectHolder(object item)
{
_top = item;
DataSet holder = new DataSet(item.GetType().Name);
// Recupera la información de la fuente de datos, select command, etc.
_dataSourceInfo = DataObjectManager.Current.GetDataSourceInfo(item.GetType());
// Recupera la información de la tabla, nombres de columnas, etc.
_table = DataObjectManager.Current.GetObjectSchema(item.GetType());
holder.Tables.Add(_table);
// enlaza los datos de la tabla al objeto.
DataObjectManager.Current.GetObjectData(_table, item);
}