//
// Authors:
// Ben Maurer (bmaurer@users.sourceforge.net)
+// Sanjay Gupta (gsanjay@novell.com)
//
// (C) 2003 Ben Maurer
+// (C) 2004-2010 Novell, Inc. (http://www.novell.com)
+//
+
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
-#if NET_2_0
using System.Collections;
using System.Collections.Specialized;
using System.Text;
+using System.ComponentModel;
namespace System.Web.UI {
public abstract class DataSourceView
{
- protected DataSourceView ()
+ //IDataSource dataSourceOwner;
+ string viewName = String.Empty;
+
+ protected DataSourceView (IDataSource owner, string viewName)
{
+ if (owner == null)
+ throw new ArgumentNullException ("owner");
+
+ //this.dataSourceOwner = owner;
+ this.viewName = viewName;
+ owner.DataSourceChanged += new EventHandler (OnDataSourceChanged);
}
-
- public virtual int Delete (IDictionary keys)
+
+ void OnDataSourceChanged (object sender, EventArgs e) {
+ OnDataSourceViewChanged (EventArgs.Empty);
+ }
+
+ public virtual void Delete (IDictionary keys, IDictionary oldValues,
+ DataSourceViewOperationCallback callback)
{
- throw new NotSupportedException ();
+ if (callback == null)
+ throw new ArgumentNullException ("callBack");
+
+ int rowAffected;
+ try {
+ rowAffected = ExecuteDelete (keys, oldValues);
+ }
+ catch (Exception e) {
+ if (!callback (0, e))
+ throw;
+ return;
+ }
+ callback (rowAffected, null);
}
-
- public virtual int Insert (IDictionary values)
+
+ protected virtual int ExecuteDelete(IDictionary keys, IDictionary oldValues)
{
throw new NotSupportedException ();
}
-
- public virtual int Update (IDictionary keys, IDictionary values)
+
+ protected virtual int ExecuteInsert (IDictionary values)
+ {
+ throw new NotSupportedException();
+ }
+
+ protected internal abstract IEnumerable ExecuteSelect (
+ DataSourceSelectArguments arguments);
+
+ protected virtual int ExecuteUpdate (IDictionary keys, IDictionary values,
+ IDictionary oldValues )
{
throw new NotSupportedException ();
}
+
+ public virtual void Insert (IDictionary values,
+ DataSourceViewOperationCallback callback)
+ {
+ if (callback == null)
+ throw new ArgumentNullException("callback");
+
+ int rowAffected;
+ try {
+ rowAffected = ExecuteInsert (values);
+ } catch (Exception e) {
+ if (!callback (0, e))
+ throw;
+ return;
+ }
+
+ callback (rowAffected, null);
+ }
+
+ protected virtual void OnDataSourceViewChanged (EventArgs e)
+ {
+ if (eventsList != null) {
+ EventHandler evtHandler = eventsList [EventDataSourceViewChanged] as EventHandler;
+ if (evtHandler != null)
+ evtHandler(this, e);
+ }
+ }
- public abstract IEnumerable Select ();
+ protected internal virtual void RaiseUnsupportedCapabilityError (
+ DataSourceCapabilities capability)
+ {
+ if ((capability & DataSourceCapabilities.Sort) != 0)
+ if (!CanSort)
+ throw new NotSupportedException ("Sort Capabilites");
+
+ if ((capability & DataSourceCapabilities.Page) != 0)
+ if (!CanPage)
+ throw new NotSupportedException("Page Capabilites");
+
+ if ((capability & DataSourceCapabilities.RetrieveTotalRowCount) != 0)
+ if (!CanRetrieveTotalRowCount)
+ throw new NotSupportedException("RetrieveTotalRowCount Capabilites");
+
+ return;
+ }
+
+ public virtual void Select (DataSourceSelectArguments arguments,
+ DataSourceViewSelectCallback callback)
+ {
+ if (callback == null)
+ throw new ArgumentNullException("callBack");
+
+ arguments.RaiseUnsupportedCapabilitiesError (this);
+
+ IEnumerable selectList = ExecuteSelect (arguments);
+ callback (selectList);
+ }
+
+ public virtual void Update(IDictionary keys, IDictionary values,
+ IDictionary oldValues, DataSourceViewOperationCallback callback)
+ {
+ if (callback == null)
+ throw new ArgumentNullException ("callback");
+ int rowAffected;
+ try {
+ rowAffected = ExecuteUpdate (keys, values, oldValues);
+ } catch (Exception e) {
+ if (!callback (0, e))
+ throw;
+ return;
+ }
+
+ callback (rowAffected, null);
+ }
+
public virtual bool CanDelete { get { return false; } }
public virtual bool CanInsert { get { return false; } }
+ public virtual bool CanPage { get { return false; } }
+ public virtual bool CanRetrieveTotalRowCount { get { return false; } }
public virtual bool CanSort { get { return false; } }
public virtual bool CanUpdate { get { return false; } }
+
+ EventHandlerList eventsList;
+ protected EventHandlerList Events {
+ get {
+ if (eventsList == null)
+ eventsList = new EventHandlerList();
+
+ return eventsList;
+ }
+ }
- public virtual string Name { get { return ""; } }
- public virtual string SortExpression {
- get { throw new NotSupportedException (); }
- set { throw new NotSupportedException (); }
+ internal bool HasEvents ()
+ {
+ return eventsList != null;
}
+
+ public string Name {
+ get { return viewName; }
+ }
+
+ static readonly object EventDataSourceViewChanged = new object ();
+
+ public event EventHandler DataSourceViewChanged
+ {
+ add { Events.AddHandler (EventDataSourceViewChanged, value); }
+ remove { Events.RemoveHandler (EventDataSourceViewChanged, value); }
+ }
+
}
}
-#endif
projects / mono.git / blobdiff