/// <summary>
/// Sets the extension on the collection.
/// </summary>
/// <typeparam name="TExtension">The extension type.</typeparam>
/// <param name="collection">The extension collection.</param>
/// <param name="extension">The extension instance.</param>
public static void SetExtension <TExtension>(this IWorkContextExtensionCollection collection, TExtension extension)
where TExtension : class
{
Ensure.IsNotNull(collection, nameof(collection));
collection[typeof(TExtension)] = extension;
}
/// <summary>
/// Gets the extension of the given type from the collection.
/// </summary>
/// <typeparam name="TExtension">The extension type.</typeparam>
/// <param name="collection">The extension collection.</param>
/// <returns>The extension instance.</returns>
public static TExtension GetExtension <TExtension>(this IWorkContextExtensionCollection collection)
where TExtension : class
{
Ensure.IsNotNull(collection, nameof(collection));
return(collection[typeof(TExtension)] as TExtension);
}
/// <summary>
/// Updates the extension reference.
/// </summary>
/// <param name="extensions">The set of extensions.</param>
/// <param name="extension">The extension.</param>
/// <returns>The extension instance.</returns>
public TExtension Update(IWorkContextExtensionCollection extensions, TExtension extension)
{
Ensure.IsNotNull(extensions, nameof(extensions));
Ensure.IsNotNull(extension, nameof(extension));
extensions.SetExtension <TExtension>(extension);
_extension = extension;
_revision = extensions.Revision;
return(extension);
}
/// <summary>
/// Fetches the most recent reivion of the given extension.
/// </summary>
/// <param name="extensions">The extension instance.</param>
/// <returns>The extension instance.</returns>
public TExtension Fetch(IWorkContextExtensionCollection extensions)
{
Ensure.IsNotNull(extensions, nameof(extensions));
if (_revision == extensions.Revision)
{
return(_extension);
}
_extension = extensions.GetExtension <TExtension>();
_revision = extensions.Revision;
return(_extension);
}
/// <summary>
/// Initialises a new instance of <see cref="WorkContext"/>.
/// </summary>
/// <param name="extensions"></param>
public WorkContext(IWorkContextExtensionCollection extensions)
{
_extensions = new WorkContextExtensionReferences <StandardExtensions>(extensions);
}
/// <summary>
/// Initialises a new instance of <see cref="WorkContextExtensionCollection"/>.
/// </summary>
/// <param name="defaults">[Optional] The set of default extensions/</param>
public WorkContextExtensionCollection(IWorkContextExtensionCollection defaults = null)
{
_defaults = defaults;
}
/// <summary>
/// Initialises a new instance of <see cref="WorkContextExtensionReferences{TCache}"/>.
/// </summary>
/// <param name="extensions">The set of extensions.</param>
public WorkContextExtensionReferences(IWorkContextExtensionCollection extensions)
{
Extensions = Ensure.IsNotNull(extensions, nameof(extensions));
Cache = default(TCache);
Revision = Extensions.Revision;
}
