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<h1>Car</h1>
<p MadCap:conditions="Global.Primary:java" />
<p MadCap:conditions="Primary..NET,Primary.c#,Primary.All languages">
<pre class="prettyprint" xml:space="preserve">Car.cs
/** Copyright (C) 2004 - 2008 Versant Inc. http://www.db4o.com */
using System;
using Db4objects.Db4o.<span class="MCTextPopup"><a href="javascript:void(0);" class="MCTextPopupSpot" onclick="FMCTextPopup( event, this ); return false;">TA<img style="border: none;margin-left: 5px;" src="../../../../SkinSupport/ExpandingClosed.gif" MadCap:altsrc="../../../../SkinSupport/ExpandingOpen.gif" class="MCExpandingIcon" onload="if ( typeof( FMCPreloadImage ) == 'function' ) { FMCPreloadImage( '../../../../SkinSupport/ExpandingOpen.gif' ); }" /></a><span class="MCTextPopupBody" style="display: none; ">Transparent Activation</span></span>;
using Db4objects.Db4o.<span class="MCPopup"><a href="javascript:void(0);" class="MCPopupSpot" onclick="FMCPopup( event, this ); return false;" MadCap:src="../../../activation.htm">Activation<img style="border: none;margin-left: 5px;" src="../../../../SkinSupport/ExpandingClosed.gif" MadCap:altsrc="../../../../SkinSupport/ExpandingOpen.gif" class="MCExpandingIcon" onload="if ( typeof( FMCPreloadImage ) == 'function' ) { FMCPreloadImage( '../../../../SkinSupport/ExpandingOpen.gif' ); }" /></a></span>;
namespace Db4objects.Db4odoc.<span class="MCTextPopup"><a href="javascript:void(0);" class="MCTextPopupSpot" onclick="FMCTextPopup( event, this ); return false;">TP<img style="border: none;margin-left: 5px;" src="../../../../SkinSupport/ExpandingClosed.gif" MadCap:altsrc="../../../../SkinSupport/ExpandingOpen.gif" class="MCExpandingIcon" onload="if ( typeof( FMCPreloadImage ) == 'function' ) { FMCPreloadImage( '../../../../SkinSupport/ExpandingOpen.gif' ); }" /></a><span class="MCTextPopupBody" style="display: none; ">Transparent Persistence</span></span>.Rollback
{
public class Car : IActivatable
{
private string _model;
private Pilot _pilot;
/**//*activator registered for this class*/
[System.NonSerialized]
public IActivator _activator;
public Car(string model, Pilot pilot)
{
_model = model;
_pilot = pilot;
}
// end Car
/**//*Bind the class to the specified object container, create the activator*/
public void Bind(IActivator activator)
{
if (_activator == activator)
{
return;
}
if (activator != null && null != _activator)
{
throw new System.InvalidOperationException();
}
_activator = activator;
}
// end Bind
public void Activate(ActivationPurpose purpose)
{
if (_activator == null)
return;
_activator.Activate(purpose);
}
// end Activate
public string Model
{
get
{
Activate(ActivationPurpose.Read);
return _model;
}
set
{
Activate(ActivationPurpose.Write);
_model = value;
}
}
public Pilot Pilot
{
get
{
Activate(ActivationPurpose.Read);
return _pilot;
}
set
{
Activate(ActivationPurpose.Write);
_pilot = value;
}
}
public void ChangePilot(String name, int id)
{
_pilot.Name = name;
_pilot.Id.Change(id);
}
override public string ToString()
{
Activate(ActivationPurpose.Read);
return string.Format("{0}[{1}]", _model, _pilot);
}
// end ToString
}
}</pre>
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<p MadCap:conditions="Global.Primary:cs" />
<p MadCap:conditions="Primary..NET,Primary.VB.NET,Primary.All languages">
<pre class="prettyprint lang-vb" xml:space="preserve">Car.vb
' Copyright (C) 2004 - 2008 Versant Inc. http://www.db4o.com
Imports System
Imports Db4objects.Db4o
Imports Db4objects.Db4o.TA
Imports Db4objects.Db4o.Activation
Namespace Db4objects.Db4odoc.TP.Rollback
Public Class Car
Implements IActivatable
Private _model As String
Private _pilot As Pilot
'activator registered for this class
<Transient()> _
Public _activator As IActivator
Public Sub New(ByVal model As String, ByVal pilot As Pilot)
_model = model
_pilot = pilot
End Sub
' end Car
'Bind the class to the specified object container, create the activator
Public Sub Bind(ByVal activator As IActivator) Implements IActivatable.Bind
If _activator Is activator Then
Return
End If
If activator IsNot Nothing AndAlso _activator IsNot Nothing Then
Throw New System.InvalidOperationException()
End If
_activator = activator
End Sub
' end Bind
Public Sub Activate(ByVal purpose As ActivationPurpose) _
Implements IActivatable.Activate
If _activator Is Nothing Then
Return
End If
_activator.Activate(purpose)
End Sub
' end Activate
Public Property Model() As String
Get
Activate(ActivationPurpose.Read)
Return _model
End Get
Set(ByVal value As String)
Activate(ActivationPurpose.Write)
_model = value
End Set
End Property
Public Property Pilot() As Pilot
Get
Activate(ActivationPurpose.Read)
Return _pilot
End Get
Set(ByVal value As Pilot)
Activate(ActivationPurpose.Write)
_pilot = value
End Set
End Property
Public Sub ChangePilot(ByVal name As String, ByVal id As Integer)
_pilot.Name = name
_pilot.Id.Change(id)
End Sub
Public Overloads Overrides Function ToString() As String
Activate(ActivationPurpose.Read)
Return String.Format("{0}[{1}]", _model, _pilot)
End Function
' end ToString
End Class
End Namespace</pre>
</p>
<p MadCap:conditions="Global.Primary:vb" />
<p MadCap:conditions="Primary.Online">Download example code:</p>
<p MadCap:conditions="Primary.Online">
<MadCap:conditionalText MadCap:conditions="Primary..NET,Primary.VB.NET,Primary.All languages"><a href="rollbackvb.zip">VB.NET </a>
</MadCap:conditionalText>
<MadCap:conditionalText MadCap:conditions="Primary..NET,Primary.c#,Primary.All languages"><a href="rollbackcs.zip">c# </a>
</MadCap:conditionalText>
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