/// <summary>
/// Adds the specific export provider to the composer.
/// </summary>
/// <param name="provider">The export provider add to the composer.</param>
/// <param name="postContainerModifier">A modifier action called after the container has been created.</param>
public void AddExportProvider(ExportProvider provider, Action <ExportProvider, CompositionContainer> postContainerModifier = null)
{
if (provider == null)
{
throw new ArgumentNullException("provider");
}
ExportProviders.Add(provider);
if (postContainerModifier != null)
{
postContainerModifiers.Add(provider, postContainerModifier);
}
}
/// <summary>
/// Ensures the Container has been instantiated/re-instantiated if the Composer has been modified.
/// </summary>
private void EnsureContainer()
{
if (modified || Container == null)
{
if (Container != null)
{
Container.Dispose();
}
Container = new CompositionContainer(Catalog, ExportProviders.ToArray());
foreach (var provider in postContainerModifiers.Keys)
{
postContainerModifiers[provider](provider, Container);
}
Container.ComposeExportedValue(this);
modified = false;
}
}
private MefContainer()
{
if (modified || _container == null)
{
if (_container != null)
{
_container.Dispose();
}
var extensionsFolder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) ?? string.Empty;
extensionsFolder = Path.Combine(extensionsFolder, "Extensions");
var catalog = new AggregateCatalog(
new AssemblyCatalog(Assembly.GetExecutingAssembly()),
new AssemblyCatalog(Assembly.GetAssembly(typeof(DatabaseConnection)))
);
if (Directory.Exists(extensionsFolder))
{
catalog.Catalogs.Add(new DirectoryCatalog(extensionsFolder));
}
if (Directory.Exists(extensionsFolder + "/HRM"))
{
catalog.Catalogs.Add(new DirectoryCatalog(extensionsFolder + "/HRM"));
}
#if SAMPLE_EXTENSIONS
var samples = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) ?? string.Empty;
samples = Path.Combine(samples, "OpenCBS.Extensions.Samples.dll");
if (File.Exists(samples))
{
catalog.Catalogs.Add(new AssemblyCatalog(samples));
}
#endif
_container = new CompositionContainer(catalog, ExportProviders.ToArray());
modified = false;
}
}
