public object[] CreateExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter, bool justOne)
{
if (extensionPoint.GetType() == typeof(DicomCodecFactoryExtensionPoint))
return new object[]{ new DicomRleCodecFactory() };
return new object[0];
}
/// <summary>
/// Creates instances of available extensions that extend the specified extension point and match the specified filter.
/// </summary>
/// <param name="extensionPoint">The extension point for which to create extensions.</param>
/// <param name="filter">An <see cref="ExtensionFilter"/> used to limit the result set to extensions with particular characteristics.</param>
/// <param name="justOne">Indicates whether or not to return only the first matching extension that is found.</param>
/// <returns>A set of extension instances.</returns>
/// <remarks>
/// Available extensions are those which are both enabled and licensed.
/// If <paramref name="justOne"/> is true, the first matching extension that is successfully instantiated is returned,
/// an no other extensions are instantiated.
/// </remarks>
public object[] CreateExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter, bool justOne)
{
// get subset of applicable extensions
var extensions = ListExtensionsHelper(extensionPoint, filter);
// attempt to instantiate the extension classes
var createdObjects = new List<object>();
foreach (var extension in extensions)
{
if (justOne && createdObjects.Count > 0)
break;
try
{
// instantiate
var o = Activator.CreateInstance(extension.ExtensionClass.Resolve());
createdObjects.Add(o);
}
catch (Exception e)
{
// instantiation failed
// this should not be considered an exceptional circumstance
// instantiation may fail by design in some cases (e.g extension is designed only to run on a particular platform)
Platform.Log(LogLevel.Debug, e);
}
}
return createdObjects.ToArray();
}
/// <summary>
/// Creates one of each type of object that extends the input <paramref name="extensionPoint" />,
/// matching the input <paramref name="filter" />; creates a single extension if <paramref name="justOne"/> is true.
/// </summary>
/// <param name="extensionPoint">The <see cref="ExtensionPoint"/> to create extensions for.</param>
/// <param name="filter">The filter used to match each extension that is discovered.</param>
/// <param name="justOne">Indicates whether or not to return only the first matching extension that is found.</param>
/// <returns></returns>
public object[] CreateExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter, bool justOne)
{
// get subset of applicable extensions
var extensions = ListExtensionsHelper(extensionPoint, filter);
// attempt to instantiate the extension classes
var createdObjects = new List <object>();
foreach (var extension in extensions)
{
if (justOne && createdObjects.Count > 0)
{
break;
}
try
{
// instantiate
var o = Activator.CreateInstance(extension.ExtensionClass);
createdObjects.Add(o);
}
catch (Exception e)
{
// instantiation failed
// this should not be considered an exceptional circumstance
// instantiation may fail by design in some cases (e.g extension is designed only to run on a particular platform)
Platform.Log(LogLevel.Debug, e);
}
}
return(createdObjects.ToArray());
}
public ExtensionInfo[] ListExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter)
{
if (extensionPoint is CacheProviderExtensionPoint)
{
return new[] { new ExtensionInfo(typeof(TestCacheProvider), typeof(CacheProviderExtensionPoint), null, null, true) };
}
throw new NotImplementedException();
}
public object[] CreateExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter, bool justOne)
{
if (extensionPoint is CacheProviderExtensionPoint)
{
return new[] { new TestCacheProvider() };
}
throw new NotImplementedException();
}
public object[] CreateExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter, bool justOne)
{
if (extensionPoint.GetType() == typeof(ProcedureStepBuilderExtensionPoint))
{
return new object[] { new ModalityProcedureStepBuilder() };
}
return new object[] { };
}
private List <ExtensionInfo> ListExtensionsHelper(ExtensionPoint extensionPoint, ExtensionFilter filter)
{
// ensure extension map has been constructed
BuildExtensionMapOnce();
List <ExtensionInfo> extensions;
if (_extensionMap.TryGetValue(extensionPoint.GetType(), out extensions))
{
return(CollectionUtils.Select(extensions,
extension => extension.Enabled && extension.Authorized && (filter == null || filter.Test(extension))));
}
return(new List <ExtensionInfo>());
}
/// <summary>
/// Creates one of each type of object that extends the input <paramref name="extensionPoint" />,
/// matching the input <paramref name="filter" />; creates a single extension if <paramref name="justOne"/> is true.
/// </summary>
/// <param name="extensionPoint">The <see cref="ExtensionPoint"/> to create extensions for.</param>
/// <param name="filter">The filter used to match each extension that is discovered.</param>
/// <param name="justOne">Indicates whether or not to return only the first matching extension that is found.</param>
/// <returns></returns>
public object[] CreateExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter, bool justOne)
{
// get subset of applicable extensions
List <ExtensionInfo> extensions = ListExtensionsHelper(extensionPoint, filter);
// attempt to instantiate the extension classes
List <object> createdObjects = new List <object>();
foreach (ExtensionInfo extension in extensions)
{
if (justOne && createdObjects.Count > 0)
{
break;
}
// is the extension a concrete class?
if (!IsConcreteClass(extension.ExtensionClass))
{
Platform.Log(LogLevel.Warn, SR.ExceptionExtensionMustBeConcreteClass,
extension.ExtensionClass.FullName);
continue;
}
// does the extension implement the required interface?
if (!extensionPoint.InterfaceType.IsAssignableFrom(extension.ExtensionClass))
{
Platform.Log(LogLevel.Warn, SR.ExceptionExtensionDoesNotImplementRequiredInterface,
extension.ExtensionClass.FullName,
extensionPoint.InterfaceType);
continue;
}
try
{
// instantiate
object o = Activator.CreateInstance(extension.ExtensionClass);
createdObjects.Add(o);
}
catch (Exception e)
{
// instantiation failed
// this should not be considered an exceptional circumstance
// instantiation may fail by design in some cases (e.g extension is designed only to run on a particular platform)
Platform.Log(LogLevel.Debug, e);
}
}
return(createdObjects.ToArray());
}
/// <summary>
/// Sets the extension factory that is used to instantiate extensions.
/// </summary>
/// <remarks>
/// This purpose of this method is to facilitate unit testing by allowing the creation of extensions
/// to be controlled by the testing code.
/// </remarks>
/// <param name="factory"></param>
public static void SetExtensionFactory(IExtensionFactory factory)
{
lock (_syncRoot)
{
//I'm sure there are other places where this might be a problem, but if
//you use an extension factory that creates service provider extensions,
//you can get UnknownServiceException problems in unit tests unless
//these 2 variables are repopulated.
_serviceProviders = null;
_duplexServiceProviders = null;
}
ExtensionPoint.SetExtensionFactory(factory);
}
/// <summary>
/// Creates one of each type of object that extends the input <paramref name="extensionPoint" />,
/// matching the input <paramref name="filter" />; creates a single extension if <paramref name="justOne"/> is true.
/// </summary>
/// <param name="extensionPoint">The <see cref="ExtensionPoint"/> to create extensions for.</param>
/// <param name="filter">The filter used to match each extension that is discovered.</param>
/// <param name="justOne">Indicates whether or not to return only the first matching extension that is found.</param>
/// <returns></returns>
public object[] CreateExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter, bool justOne)
{
// get subset of applicable extensions
List<ExtensionInfo> extensions = ListExtensionsHelper(extensionPoint, filter);
// attempt to instantiate the extension classes
List<object> createdObjects = new List<object>();
foreach (ExtensionInfo extension in extensions)
{
if (justOne && createdObjects.Count > 0)
break;
// is the extension a concrete class?
if (!IsConcreteClass(extension.ExtensionClass))
{
Platform.Log(LogLevel.Warn, SR.ExceptionExtensionMustBeConcreteClass,
extension.ExtensionClass.FullName);
continue;
}
// does the extension implement the required interface?
if (!extensionPoint.InterfaceType.IsAssignableFrom(extension.ExtensionClass))
{
Platform.Log(LogLevel.Warn, SR.ExceptionExtensionDoesNotImplementRequiredInterface,
extension.ExtensionClass.FullName,
extensionPoint.InterfaceType);
continue;
}
try
{
// instantiate
object o = Activator.CreateInstance(extension.ExtensionClass);
createdObjects.Add(o);
}
catch (Exception e)
{
// instantiation failed
// this should not be considered an exceptional circumstance
// instantiation may fail by design in some cases (e.g extension is designed only to run on a particular platform)
Platform.Log(LogLevel.Debug, e);
}
}
return createdObjects.ToArray();
}
private List <ExtensionInfo> ListExtensionsHelper(ExtensionPoint extensionPoint, ExtensionFilter filter)
{
// ensure extension map has been constructed
BuildExtensionMapOnce();
Type extensionPointClass = extensionPoint.GetType();
List <ExtensionInfo> extensions;
if (_extensionMap.TryGetValue(extensionPointClass, out extensions))
{
return(CollectionUtils.Select(extensions,
delegate(ExtensionInfo extension)
{
return extension.Enabled &&
(filter == null || filter.Test(extension));
}));
}
else
{
return(new List <ExtensionInfo>());
}
}
/// <summary>
/// Sets the extension factory that is used to instantiate extensions.
/// </summary>
/// <remarks>
/// This purpose of this method is to facilitate unit testing by allowing the creation of extensions
/// to be controlled by the testing code.
/// </remarks>
/// <param name="factory"></param>
public static void SetExtensionFactory(IExtensionFactory factory)
{
ExtensionPoint.SetExtensionFactory(factory);
}
private List<ExtensionInfo> ListExtensionsHelper(ExtensionPoint extensionPoint, ExtensionFilter filter)
{
// ensure extension map has been constructed
BuildExtensionMapOnce();
Type extensionPointClass = extensionPoint.GetType();
List<ExtensionInfo> extensions;
if (_extensionMap.TryGetValue(extensionPointClass, out extensions))
{
return CollectionUtils.Select(extensions,
delegate(ExtensionInfo extension)
{
return extension.Enabled
&& (filter == null || filter.Test(extension));
});
}
else
{
return new List<ExtensionInfo>();
}
}
/// <summary>
/// Gets metadata describing all enabled 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 ExtensionInfo[] ListExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter)
{
return ListExtensionsHelper(extensionPoint, filter).ToArray();
}
/// <summary>
/// Gets metadata describing all enabled 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 ExtensionInfo[] ListExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter)
{
return(ListExtensionsHelper(extensionPoint, filter).ToArray());
}
public ExtensionInfo[] ListExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter)
{
return new ExtensionInfo[0];
}
private List<ExtensionInfo> ListExtensionsHelper(ExtensionPoint extensionPoint, ExtensionFilter filter)
{
// ensure extension map has been constructed
BuildExtensionMapOnce();
List<ExtensionInfo> extensions;
if (_extensionMap.TryGetValue(extensionPoint.GetType(), out extensions))
{
return CollectionUtils.Select(extensions,
extension => extension.Enabled && extension.Authorized && (filter == null || filter.Test(extension)));
}
return new List<ExtensionInfo>();
}
public ExtensionInfo[] ListExtensions(ExtensionPoint extensionPoint, ExtensionFilter filter)
{
throw new Exception("The method or operation is not implemented.");
}