private InternalAnnotatableBuilder HasAnnotation(
string name, object value, ConfigurationSource configurationSource, bool canOverrideSameSource)
{
var existingAnnotation = Metadata.FindAnnotation(name);
if (existingAnnotation != null)
{
if (Equals(existingAnnotation.Value, value))
{
existingAnnotation.UpdateConfigurationSource(configurationSource);
return(this);
}
if (!CanSetAnnotationValue(existingAnnotation, value, configurationSource, canOverrideSameSource))
{
return(null);
}
Metadata.SetAnnotation(name, value, configurationSource);
return(this);
}
Metadata.AddAnnotation(name, value, configurationSource);
return(this);
}
private bool HasAnnotation(
string name, object value, ConfigurationSource configurationSource, bool canOverrideSameSource)
{
var existingAnnotation = Metadata.FindAnnotation(name);
if (existingAnnotation != null)
{
if (existingAnnotation.Value.Equals(value))
{
existingAnnotation.UpdateConfigurationSource(configurationSource);
return(true);
}
var existingConfigurationSource = existingAnnotation.GetConfigurationSource();
if (!configurationSource.Overrides(existingConfigurationSource) ||
((configurationSource == existingConfigurationSource) && !canOverrideSameSource))
{
return(false);
}
if (value == null)
{
var removed = Metadata.RemoveAnnotation(name);
Debug.Assert(removed == existingAnnotation);
}
else
{
Metadata.SetAnnotation(name, value, configurationSource);
}
return(true);
}
if (value != null)
{
Metadata.AddAnnotation(name, value, configurationSource);
}
return(true);
}
