protected virtual bool TryCreateProxy(object source, SourceDescription description, out ISourceProxy proxy)
{
proxy = null;
foreach (PriorityFactoryPair pair in this.factories)
{
try
{
var factory = pair.factory;
if (factory == null)
{
continue;
}
proxy = factory.CreateProxy(source, description);
if (proxy != null)
{
return(true);
}
}
catch (Exception e)
{
if (log.IsWarnEnabled)
{
log.WarnFormat("Unable to bind: \"{0}\";exception:{1}", description.ToString(), e);
}
}
}
proxy = null;
return(false);
}
public ISourceProxy CreateProxy(object source, SourceDescription description)
{
if (!description.IsStatic && source == null)
{
return(new EmptSourceProxy(description));
}
ISourceProxy proxy = null;
if (TryCreateProxy(source, description, out proxy))
{
return(proxy);
}
throw new BindingException("Unable to bind: \"{0}\"", description.ToString());
}
public virtual object GetValue()
{
if (log.IsWarnEnabled)
{
log.WarnFormat("this is an empty source proxy,If you see this, then the DataContext/SourceObject is null.The SourceDescription is \"{0}\"", description.ToString());
}
return(null);
}
protected virtual bool TryCreateProxy(object source, SourceDescription description, out ISourceProxy proxy)
{
proxy = null;
foreach (PriorityFactoryPair pair in this.factories)
{
var factory = pair.factory;
if (factory == null)
{
continue;
}
try
{
proxy = factory.CreateProxy(source, description);
if (proxy != null)
{
return(true);
}
}
catch (MissingMemberException e)
{
throw e;
}
catch (NullReferenceException e)
{
throw e;
}
catch (Exception e)
{
if (log.IsWarnEnabled)
{
log.WarnFormat("An exception occurred when using the \"{0}\" factory to create a proxy for the \"{1}\";exception:{2}", factory.GetType().Name, description.ToString(), e);
}
}
}
proxy = null;
return(false);
}
public ISourceProxy CreateProxy(object source, SourceDescription description)
{
try
{
if (!description.IsStatic && source == null)
{
return(new EmptSourceProxy(description));
}
ISourceProxy proxy = null;
if (TryCreateProxy(source, description, out proxy))
{
return(proxy);
}
throw new NotSupportedException("Not found available proxy factory.");
}
catch (Exception e)
{
throw new ProxyException(e, "An exception occurred while creating a proxy for the \"{0}\".", description.ToString());
}
}
private void DebugWarning()
{
if (log.IsWarnEnabled)
{
log.WarnFormat("this is an empty source proxy,If you see this, then the DataContext is null.The SourceDescription is \"{0}\"", description.ToString());
}
}