/// <summary>
/// Gets the delete work units.
/// </summary>
/// <param name="entity"></param>
/// <param name="et"></param>
/// <param name="modifiedFields"></param>
/// <returns></returns>
public override IWorkUnit[] GetDeleteWorkUnits(object entity, EntityType et, EntityField[] modifiedFields)
{
if (entity == null)
{
throw new ArgumentNullException("entity");
}
if (et == null)
{
throw new ArgumentNullException("et");
}
if (modifiedFields == null)
{
throw new ArgumentNullException("modifiedFields");
}
// create...
WorkUnitCollection units = new WorkUnitCollection();
if (FlatTableWorkUnit.DoesExtendedTableExist(et))
{
// Create a delete work unit for extended properties, we may not have any field changes
// get all of the fields...
EntityField[] keyFields = et.GetKeyFields();
object[] values = et.Storage.GetValues(entity, keyFields);
// add...
units.Add(new FlatTableDeleteAllWorkUnit(et, entity, keyFields, values));
}
// return...
return(units.ToArray());
}
/// <summary>
/// Gets the insert work units.
/// </summary>
/// <param name="entity"></param>
/// <param name="et"></param>
/// <param name="modifiedFields"></param>
/// <returns></returns>
public override IWorkUnit[] GetInsertWorkUnits(object entity, EntityType et, EntityField[] modifiedFields)
{
// results...
WorkUnitCollection units = new WorkUnitCollection();
// check...
if (FlatTableWorkUnit.DoesExtendedTableExist(et))
{
// keys...
EntityField[] keyFields = et.GetKeyFields();
if (keyFields == null)
{
throw new InvalidOperationException("keyFields is null.");
}
// create...
foreach (EntityField field in modifiedFields)
{
ArrayList unitFields = new ArrayList(keyFields);
unitFields.Add(field);
EntityField[] workUnitFields = (EntityField[])unitFields.ToArray(typeof(EntityField));
object[] values = et.Storage.GetValues(entity, workUnitFields);
// create...
units.Add(new FlatTableInsertWorkUnit(et, entity, workUnitFields, values));
}
}
// return...
return(units.ToArray());
}
/// <summary>
/// Gets the work units to use with an update.
/// </summary>
/// <param name="entity"></param>
/// <param name="et"></param>
/// <param name="modifiedFields"></param>
/// <returns></returns>
public override IWorkUnit[] GetUpdateWorkUnits(object entity, EntityType et, EntityField[] modifiedFields)
{
if (entity == null)
{
throw new ArgumentNullException("entity");
}
if (et == null)
{
throw new ArgumentNullException("et");
}
if (modifiedFields == null)
{
throw new ArgumentNullException("modifiedFields");
}
// key fields...
EntityField[] keyFields = et.GetKeyFields();
if (keyFields == null)
{
throw new InvalidOperationException("'keyFields' is null.");
}
if (keyFields.Length == 0)
{
throw new InvalidOperationException("'keyFields' is zero-length.");
}
// get...
WorkUnitCollection units = new WorkUnitCollection();
if (FlatTableWorkUnit.DoesExtendedTableExist(et))
{
// create...
foreach (EntityField field in modifiedFields)
{
// mbr - 17-03-2006 - check that we don't actually have null... if we do, we actually need to delete the row...
if (et.Storage.IsDBNull(entity, field))
{
// add...
object[] keyValues = et.Storage.GetValues(entity, keyFields);
units.Add(new FlatTableDeleteOneWorkUnit(et, entity, keyFields, keyValues, field.NativeName.Name));;
}
else
{
ArrayList unitFields = new ArrayList(keyFields);
unitFields.Add(field);
EntityField[] workUnitFields = (EntityField[])unitFields.ToArray(typeof(EntityField));
object[] values = et.Storage.GetValues(entity, workUnitFields);
// create...
units.Add(new FlatTableUpdateWorkUnit(et, entity, workUnitFields, values));
}
}
}
// return...
return(units.ToArray());
}
