/// <summary>
/// Implements Interfaces, allowing the specification of an export provider.
/// </summary>
/// <param name="node"></param>
/// <param name="exports"></param>
/// <returns></returns>
static IEnumerable <T> Interfaces <T>(this XObject node, ExportProvider exports)
{
Contract.Requires <ArgumentNullException>(node != null);
Contract.Requires <ArgumentNullException>(exports != null);
return(node.AnnotationOrCreate <ExtensionQuery <T> >(() => exports.GetExportedValue <ExtensionQuery <T> >()));
}
/// <summary>
/// Implements Interfaces, allowing the specification of an export provider.
/// </summary>
/// <param name="node"></param>
/// <param name="exports"></param>
/// <returns></returns>
static IEnumerable <object> Interfaces(this XObject node, Type type, ExportProvider exports)
{
Contract.Requires <ArgumentNullException>(node != null);
Contract.Requires <ArgumentNullException>(type != null);
Contract.Requires <ArgumentNullException>(exports != null);
return((ExtensionQuery)node.AnnotationOrCreate(typeof(ExtensionQuery <>).MakeGenericType(type), () => exports.GetExportedValue(typeof(ExtensionQuery <>).MakeGenericType(type))));
}
/// <summary>
/// Initializes a new instance.
/// </summary>
/// <param name="xml"></param>
public ModelItem(XObject xml)
{
Contract.Requires <ArgumentNullException>(xml != null);
this.xml = xml;
this.model = new Lazy <Model>(() => xml.Document.Annotation <Model>());
this.instance = new Lazy <Instance>(() => xml.Document.Annotation <Instance>());
this.state = new Lazy <ModelItemState>(() => xml.AnnotationOrCreate <ModelItemState>());
}
/// <summary>
/// Initializes a new instance.
/// </summary>
/// <param name="xml"></param>
public ModelItem(XObject xml)
{
Contract.Requires<ArgumentNullException>(xml != null);
this.xml = xml;
this.model = new Lazy<Model>(() => xml.Document.Annotation<Model>());
this.instance = new Lazy<Instance>(() => xml.Document.Annotation<Instance>());
this.state = new Lazy<ModelItemState>(() => xml.AnnotationOrCreate<ModelItemState>());
}
/// <summary>
/// Gets the unique identifier for the object.
/// </summary>
/// <param name="self"></param>
/// <returns></returns>
public static int GetObjectId(this XObject self)
{
Contract.Requires <ArgumentNullException>(self != null);
Contract.Requires <ArgumentNullException>(self.Document != null);
// gets the node id, or allocates a new one with the document
return(self.AnnotationOrCreate <ObjectAnnotation>(() =>
new ObjectAnnotation(
self.Document.AnnotationOrCreate <DocumentAnnotation>()
.GetNextObjectId())).Id);
}
/// <summary>
/// Sets the BaseUri of the <see cref="XObject"/>.
/// </summary>
/// <param name="self"></param>
/// <param name="baseUri"></param>
public static void SetBaseUri(this XObject self, Uri baseUri)
{
Contract.Requires <ArgumentNullException>(self != null);
if (baseUri != null)
{
self.AnnotationOrCreate <BaseUriAnnotation>().BaseUri = baseUri;
}
else
{
self.RemoveAnnotations <BaseUriAnnotation>();
}
}
/// <summary>
/// Gets the <see cref="ExportProvider"/> for the given <see cref="XObject"/>.
/// </summary>
/// <param name="self"></param>
/// <returns></returns>
public static ExportProvider Exports(this XObject self)
{
Contract.Requires <ArgumentNullException>(self != null);
Contract.Ensures(Contract.Result <ExportProvider>() != null);
// get or create the new object container annotation
return(self.AnnotationOrCreate <ExportProvider>(() =>
{
var document = self.Document.Annotation <Document>();
if (document == null)
{
throw new InvalidOperationException();
}
// initialize new container
var container = CompositionUtil.ConfigureContainer(new CompositionContainer(
document.Configuration.ObjectCatalog,
CompositionOptions.DisableSilentRejection,
document.Container));
if (self is XObject)
{
container.WithExport <XObject>(self);
}
if (self is XDocument)
{
container.WithExport <XDocument>((XDocument)self);
}
if (self is XElement)
{
container.WithExport <XElement>((XElement)self);
}
if (self is XNode)
{
container.WithExport <XNode>((XNode)self);
}
if (self is XAttribute)
{
container.WithExport <XAttribute>((XAttribute)self);
}
return container;
}));
}
/// <summary>
/// Gets the model item for the given <see cref="XObject"/>.
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static ModelItem Get(XObject obj)
{
return(obj.AnnotationOrCreate <ModelItem>(() => new ModelItem(obj)));
}
/// <summary>
/// Obtains the model item properties for <paramref name="obj"/>.
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
ModelItemState GetModelItem(XObject obj)
{
Contract.Requires<ArgumentNullException>(obj != null);
return obj.AnnotationOrCreate<ModelItemState>();
}
/// <summary>
/// Obtains the model item properties for <paramref name="obj"/>.
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
ModelItemState GetModelItem(XObject obj)
{
Contract.Requires <ArgumentNullException>(obj != null);
return(obj.AnnotationOrCreate <ModelItemState>());
}
bool IsValid(XObject obj)
{
return obj.AnnotationOrCreate<ValidityAnnotation>(() => new ValidityAnnotation(true)).Valid;
}
bool IsValid(XObject obj)
{
return(obj.AnnotationOrCreate <ValidityAnnotation>(() => new ValidityAnnotation(true)).Valid);
}
/// <summary>
/// Gets the model item for the given <see cref="XObject"/>.
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static ModelItem Get(XObject obj)
{
return obj.AnnotationOrCreate<ModelItem>(() => new ModelItem(obj));
}