/// <summary>
/// Gets metadata describing all extensions of the input <paramref name="extensionPoint"/>,
/// matching the given <paramref name="filter"/>.
/// </summary>
/// <param name="extensionPoint">The <see cref="ExtensionPoint"/> whose extension metadata is to be retrieved.</param>
/// <param name="filter">An <see cref="ExtensionFilter"/> used to filter out extensions with particular characteristics.</param>
/// <returns></returns>
public virtual ExtensionInfo[] ListExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter)
{
if (extensionPoint == null)
{
throw new ArgumentNullException("extensionPoint");
}
var extensionPointType = extensionPoint.GetType();
if (!_extensionMap.ContainsKey(extensionPointType))
{
return(new ExtensionInfo[0]);
}
var extensions = new List <ExtensionInfo>();
foreach (var extensionType in _extensionMap[extensionPointType])
{
var extensionInfo = new ExtensionInfo(extensionType, extensionPointType, extensionType.Name, extensionType.AssemblyQualifiedName, true);
if (filter == null || filter.Test(extensionInfo))
{
extensions.Add(extensionInfo);
}
}
return(extensions.ToArray());
}
private IEnumerable <ExtensionDescriptor> ListExtensionsCore(ExtensionPoint extensionPoint, ExtensionFilter filter)
{
if (extensionPoint == null)
{
throw new ArgumentNullException("extensionPoint");
}
var extensionPointType = extensionPoint.GetType();
if (!_extensionMap.ContainsKey(extensionPointType))
{
return(Enumerable.Empty <ExtensionDescriptor>());
}
var extensions = _extensionMap[extensionPointType].Select(x => x);
if (filter != null)
{
extensions = extensions.Where(x => filter.Test(x.Info));
}
return(extensions);
}