/// <summary>
/// Retrieves collection of data objects.
/// </summary>
/// <returns>
/// Collection of generic data objects. Empty collection is returned
/// if no data objects found.
/// </returns>
protected IEnumerable <T> FindAllObjects <T, TEntity>()
where T : DataObject
where TEntity : EntityObject
{
return(FindObjects <T, TEntity>(
SqlFormatHelper.FormatObjName(_entitySet)));
}
protected IEnumerable <T> FindObjects <T, TEntity>(Expression <Func <TEntity, bool> > whereClause)
where T : DataObject
where TEntity : EntityObject
{
Debug.Assert(whereClause != null);
// get objects query
ObjectQuery <TEntity> query = _context.CreateQuery <TEntity>(SqlFormatHelper.FormatObjName(_entitySet));
// find objects
IQueryable <TEntity> resultQuery = query.Where(whereClause);
List <T> list = new List <T>(_FindObjects <T, TEntity>(resultQuery));
return(list.AsReadOnly());
}
/// <summary>
/// Removes all data objects from object context.
/// </summary>
protected void RemoveAllObjects <TEntity>()
where TEntity : EntityObject
{
// remove data object from cache
//_context.Cache.Clear();
// remove entity objects from context
// EF 1.0 does not support RemoveAll functionality
// TODO: use entity SQL
ObjectQuery <TEntity> query = _context.CreateQuery <TEntity>(
SqlFormatHelper.FormatObjName(_entitySet));
foreach (TEntity entity in query)
{
_context.DeleteObject(entity);
}
}
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
public ObjectQuery <TEntity> CreateDefaultQuery <TEntity>()
{
return(_context.CreateQuery <TEntity>(
SqlFormatHelper.FormatObjName(_entitySet)));
}
