/// <summary>
/// Retrieves objects of a specified type by an foreign-key column, with ordering specified by another column
/// </summary>
/// <typeparam name="T">The type of the objects to be retrieved.</typeparam>
/// <param name="session">The currently active persistence session.</param>
/// <param name="key">The name of the key property/field.</param>
/// <param name="value">The value that the named property must hold.</param>
/// <param name="sortKey">The property/field by which to sort</param>
/// <param name="dir">The direction of the sorting</param>
/// <returns>A list of all objects meeting the specified criteria.</returns>
public static IList <T> RetrieveByForeignKey <T>(MPRSession session, string key, Int64 value, string sortKey, Direction dir)
{
return(session.Session.CreateCriteria(typeof(T))
.Add(Expression.Eq(key + ".Id", value))
.AddOrder(dir == Direction.Ascending ? Order.Asc(sortKey) : Order.Desc(sortKey))
.List <T>());
}
/// <summary>
/// Deletes objects of a specified type.
/// </summary>
/// <param name="session">The currently active persistence session.</param>
/// <param name="itemsToDelete">The items to delete.</param>
/// <typeparam name="T">The type of objects to delete.</typeparam>
public static void Delete <T>(MPRSession session, IList <T> itemsToDelete)
{
foreach (T item in itemsToDelete)
{
session.Session.Delete(item);
}
}
public static MPRSession StartSession()
{
MPRSession session = new MPRSession();
session.Session = DatabaseHelper.GetCurrentSession();
session.Transaction = session.Session.BeginTransaction();
return(session);
}
public static void EndSession(MPRSession session, bool commit)
{
if ((session != null) && (session.Transaction != null))
{
if (commit)
{
session.Transaction.Commit();
}
else
{
session.Transaction.Rollback();
}
session.Transaction = null;
}
}
/// <summary>
///
/// </summary>
/// <typeparam name="T">The type of the objects to be retrieved. Must implement DisplayObject</typeparam>
/// <param name="orderField"></param>
/// <param name="direction"></param>
/// <returns></returns>
public static IList <T> RetrieveAll <T>(MPRSession session, string orderField, SortDirection direction)
where T : IDisplayObject, new()
{
// Get the query string of type T.
// TODO: I would be really happy to find a way to do that without an instance
T displayObject = new T();
string sql = ((IDisplayObject)displayObject).QueryStringSelect;
if (orderField != null)
{
sql += " order by " + orderField + (direction == SortDirection.Ascending ? " asc " : " desc ");
}
IList <T> items = session.Session.CreateSQLQuery(sql)
.SetResultTransformer(Transformers.AliasToBean(typeof(T)))
.List <T>();
return(items);
}
public static ISet <MPTag> GetTags(MPRSession session, string tagNameList)
{
string[] tagNames = tagNameList.Split(',');
IList <MPTag> tags = session.Session.CreateCriteria(typeof(MPTag))
.Add(Expression.In("Name", tagNames))
.List <MPTag>();
Set <string> tagNamesExisting = new HashedSet <string>();
foreach (MPTag tag in tags)
{
tagNamesExisting.Add(tag.Name);
}
ISet <MPTag> results = new HashedSet <MPTag>(tags);
foreach (string tagName in (new HashedSet <string>(tagNames)).Minus(tagNamesExisting))
{
MPTag tag = new MPTag {
Name = tagName
};
session.Session.Save(tag);
results.Add(tag);
}
return(results);
}
protected void FillCategoriesForSelectedItemType(MPRSession session)
{
if (typesList.SelectedValue == null)
{
return;
}
// Remove the previous categories
categoriesList.Items.Clear();
// Fill the categories for the selected type
Int64 typeId;
Int64.TryParse(typesList.SelectedValue, out typeId);
IList<MPCategory> categories = MPRController.RetrieveByForeignKey<MPCategory>(session, "Type", typeId);
foreach (MPCategory category in categories)
{
categoriesList.Items.Add(new ListItem(category.Name, category.Id.ToString()));
}
}
public static IList <T> RetrieveAll <T>(MPRSession session)
where T : IDisplayObject, new()
{
return(RetrieveAll <T>(session, null, SortDirection.Ascending));
}
/// <summary>
/// Deletes an object of a specified type.
/// </summary>
/// <param name="session">The currently active persistence session.</param>
/// <param name="itemsToDelete">The items to delete.</param>
/// <typeparam name="T">The type of objects to delete.</typeparam>
public static void Delete <T>(MPRSession session, T item)
{
session.Session.Delete(item);
}
public static void Save <T>(MPRSession session, T item, out Int64 newId)
{
newId = (Int64)session.Session.Save(item);
}
/// <summary>
/// Saves an object and its persistent children.
/// </summary>
public static void Save <T>(MPRSession session, T item)
{
session.Session.SaveOrUpdate(item);
}
public static IList <T> RetrieveByIdList <T>(MPRSession session, List <Int64> ids)
{
return(session.Session.CreateCriteria(typeof(T))
.Add(Expression.In("Id", ids))
.List <T>());
}
/// <summary>
/// Retrieves object of a specified type by its Id field
/// </summary>
/// <typeparam name="T">The type of the objects to be retrieved.</typeparam>
/// <param name="session">The currently active persistence session.</param>
/// <param name="id">The id of the object.</param>
/// <returns>The object or null if not found</returns>
public static T RetrieveById <T>(MPRSession session, Int64 id)
{
return(session.Session.Get <T>(id));
}
/// <summary>
/// Retrieves objects of a specified type by an foreign-key column
/// </summary>
/// <typeparam name="T">The type of the objects to be retrieved.</typeparam>
/// <param name="session">The currently active persistence session.</param>
/// <param name="key">The name of the column to be tested.</param>
/// <param name="value">The value that the named property must hold.</param>
/// <returns>A list of all objects meeting the specified criteria.</returns>
public static IList <T> RetrieveByForeignKey <T>(MPRSession session, string key, Int64 value)
{
return(session.Session.CreateCriteria(typeof(T))
.Add(Expression.Eq(key + ".Id", value))
.List <T>());
}
/// <summary>
/// Retrieves objects of a specified type where a specified property equals a specified value.
/// </summary>
/// <typeparam name="T">The type of the objects to be retrieved.</typeparam>
/// <param name="session">The currently active persistence session.</param>
/// <param name="propertyName">The name of the property to be tested.</param>
/// <param name="propertyValue">The value that the named property must hold.</param>
/// <returns>A list of all objects meeting the specified criteria.</returns>
public static IList <T> RetrieveEquals <T>(MPRSession session, string propertyName, object propertyValue)
{
return(session.Session.CreateCriteria(typeof(T))
.Add(Expression.Eq(propertyName, propertyValue))
.List <T>());
}
/// <summary>
/// Retrieves all objects of a given type.
/// </summary>
/// <param name="session">The currently active persistence session.</param>
/// <typeparam name="T">The type of the objects to be retrieved.</typeparam>
/// <returns>A list of all objects of the specified type.</returns>
public static IList <T> RetrieveAll <T>(MPRSession session)
{
// Retrieve all objects of the type passed in
return(session.Session.CreateCriteria(typeof(T))
.List <T>());
}
