/// <summary>
/// Converts the <see cref="PersistenceReadWriterElement"/> in a <see cref="PersistenceReadWriterElementCollection"/>
/// to a <see cref="ResolvedParameter"/>, meaning persistence repository types referenced in configuration
/// by name can be injected into the constructor of the parent provider.
/// </summary>
/// <remarks><see cref="ResolvedParameter"/> types allow for the deferred resolution of a type by using
/// an <see cref="IComponentContext"/> to queue calls to resolve the instances, which would otherwise be
/// tricky to do via chaining modules together</remarks>
/// <returns>The parameters represented by this collection.</returns>
public static IEnumerable <Parameter> ToParameters(this PersistenceReadWriterElementCollection collection)
{
foreach (PersistenceReadWriterElement parameter in collection)
{
PersistenceReadWriterElement localParameter = parameter;
yield return(new ResolvedParameter(
(p, c) =>
(p.ParameterType == localParameter.ToType() || p.Name == "readWriter" ||
localParameter.ToType().IsAssignableFrom(p.ParameterType)),
(p, c) => ResolveNamedPersistenceRepositoryProvider(c, localParameter)));
}
}
/// <summary>
/// Resolves the named persistence read-writer using an <see cref="IComponentContext"/>.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="providerElement">The provider element.</param>
/// <returns></returns>
/// <remarks></remarks>
private static object ResolveNamedPersistenceRepositoryProvider(IComponentContext context,
PersistenceReadWriterElement providerElement)
{
return(context.ResolveNamed(providerElement.InternalKey, providerElement.ToType()));
}
/// <summary>
/// Resolves the named persistence read-writer using an <see cref="IComponentContext"/>.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="providerElement">The provider element.</param>
/// <returns></returns>
/// <remarks></remarks>
private static object ResolveNamedPersistenceRepositoryProvider(IComponentContext context,
PersistenceReadWriterElement providerElement)
{
return context.ResolveNamed(providerElement.InternalKey, providerElement.ToType());
}