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<h1>Creating your own reflector</h1>
<p>By default db4o uses the <span MadCap:conditions="Primary..NET">NetReflector</span>. As alternative you can create your own reflector and use it with db4o. In order to do so you need to implement the <span MadCap:conditions="Primary..NET">I</span>Reflector interface. And then pass an instance of your implementation to db4o.</p>
<p>Here's an example of a logging reflector. Its only difference from standard reflector is that information about loaded classes is outputted to console:</p>
<div class="codesnippet" MadCap:conditions="Primary.c#">
<pre class="prettyprint" xml:space="preserve">internal class LoggerReflector : IReflector
{
private readonly IReflector readReflector;
public LoggerReflector()
{
this.readReflector = new NetReflector();
}
public LoggerReflector(IReflector readReflector)
{
this.readReflector = readReflector;
}
public void Configuration(IReflectorConfiguration reflectorConfiguration)
{
readReflector.Configuration(reflectorConfiguration);
}
public IReflectArray Array()
{
return readReflector.Array();
}
public IReflectClass ForClass(Type type)
{
Console.WriteLine("Reflector.forClass({0})", type);
return readReflector.ForClass(type);
}
public IReflectClass ForName(string className)
{
Console.WriteLine("Reflector.forName({0})", className);
return readReflector.ForName(className);
}
public IReflectClass ForObject(object o)
{
Console.WriteLine("Reflector.forObject(" + o + ")");
return readReflector.ForObject(o);
}
public bool IsCollection(IReflectClass reflectClass)
{
return readReflector.IsCollection(reflectClass);
}
public void SetParent(IReflector reflector)
{
readReflector.SetParent(reflector);
}
public object DeepClone(object o)
{
return new LoggerReflector((IReflector) readReflector.DeepClone(o));
}
}</pre>
<div class="codesnippet-meta">ReflectorExamples.cs: Logging reflector
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<div class="codesnippet" MadCap:conditions="Primary.VB.NET">
<pre class="prettyprint lang-vb" MadCap:conditions="Primary.Online" xml:space="preserve">Friend Class LoggerReflector
Implements IReflector
Private ReadOnly readReflector As IReflector
Public Sub New()
Me.readReflector = New NetReflector()
End Sub
Public Sub New(ByVal readReflector As IReflector)
Me.readReflector = readReflector
End Sub
Public Sub Configuration(ByVal reflectorConfiguration As IReflectorConfiguration) _
Implements IReflector.Configuration
readReflector.Configuration(reflectorConfiguration)
End Sub
Public Function Array() As IReflectArray _
Implements IReflector.Array
Return readReflector.Array()
End Function
Public Function ForClass(ByVal type As Type) As IReflectClass _
Implements IReflector.ForClass
Console.WriteLine("Reflector.forClass({0})", type)
Return readReflector.ForClass(type)
End Function
Public Function ForName(ByVal className As String) As IReflectClass _
Implements IReflector.ForName
Console.WriteLine("Reflector.forName({0})", className)
Return readReflector.ForName(className)
End Function
Public Function ForObject(ByVal o As Object) As IReflectClass _
Implements IReflector.ForObject
Console.WriteLine("Reflector.forObject(" & Convert.ToString(o) & ")")
Return readReflector.ForObject(o)
End Function
Public Function IsCollection(ByVal reflectClass As IReflectClass) As Boolean _
Implements IReflector.IsCollection
Return readReflector.IsCollection(reflectClass)
End Function
Public Sub SetParent(ByVal reflector As IReflector) _
Implements IReflector.SetParent
readReflector.SetParent(reflector)
End Sub
Public Function DeepClone(ByVal o As Object) As Object _
Implements IReflector.DeepClone
Return New LoggerReflector(DirectCast(readReflector.DeepClone(o), IReflector))
End Function
End Class</pre>
<div class="codesnippet-meta">ReflectorExamples.vb: Logging reflector
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