/// <summary>
/// Gets called when a Uri cannot be resolved
/// </summary>
/// <param name="e">The event data</param>
protected virtual void OnUnresolvedModelElement(UnresolvedModelElementEventArgs e)
{
if (UnresolvedModelElement != null)
{
UnresolvedModelElement(this, e);
}
}
/// <summary>
/// Gets called when a Uri cannot be resolved
/// </summary>
/// <param name="e">The event data</param>
protected virtual void OnUnresolvedModelElement(UnresolvedModelElementEventArgs e)
{
if (UnresolvedModelElement != null) UnresolvedModelElement(this, e);
}
/// <summary>
/// Resolves the given Uri and returns the model element
/// </summary>
/// <param name="uri">The Uri where to look for the model element</param>
/// <param name="hintPath">The path where the model can be found</param>
/// <param name="loadOnDemand">A boolean flag indicating whether the uri should be attempted
/// to load, if the model is not already registered with the repository</param>
/// <returns>A model element at the given Uri or null if none can be found</returns>
public IModelElement Resolve(Uri uri, string hintPath, bool loadOnDemand = true)
{
if (uri == null) throw new ArgumentNullException("uri");
Model model;
Uri modelUri;
Func<Stream> streamCreator;
if (!models.TryGetValue(uri, out model))
{
var parentResolved = Parent.Resolve(uri, false);
if (parentResolved != null) return parentResolved;
if (loadOnDemand)
{
if (hintPath == null)
{
var locator = Locators.Where(l => l.CanLocate(uri)).FirstOrDefault();
if (locator == null)
{
if (parentResolved != null) return parentResolved;
var e = new UnresolvedModelElementEventArgs(uri);
OnUnresolvedModelElement(e);
return e.ModelElement;
}
modelUri = locator.GetRepositoryUri(uri);
streamCreator = () => locator.Open(modelUri);
}
else
{
modelUri = uri;
streamCreator = () => File.OpenRead(hintPath);
}
if (!models.TryGetValue(modelUri, out model))
{
using (var stream = streamCreator())
{
model = Serializer.Deserialize(stream, modelUri, this, true);
if (model.RootElements.Count == 1)
{
var ns = model.RootElements[0] as INamespace;
if (ns != null)
{
model.ModelUri = ns.Uri;
if (!models.ContainsKey(ns.Uri))
{
models.Add(ns.Uri, model);
}
}
}
}
}
}
else
{
return null;
}
}
if (uri.IsAbsoluteUri)
{
var element = model.Resolve(uri.Fragment);
if (element == null)
{
var e = new UnresolvedModelElementEventArgs(uri);
OnUnresolvedModelElement(e);
element = e.ModelElement;
}
return element;
}
else
{
return model;
}
}
/// <summary>
/// Resolves the given Uri and returns the model element
/// </summary>
/// <param name="uri">The Uri where to look for the model element</param>
/// <param name="hintPath">The path where the model can be found</param>
/// <param name="loadOnDemand">A boolean flag indicating whether the uri should be attempted
/// to load, if the model is not already registered with the repository</param>
/// <returns>A model element at the given Uri or null if none can be found</returns>
public IModelElement Resolve(Uri uri, string hintPath, bool loadOnDemand = true)
{
if (uri == null)
{
throw new ArgumentNullException("uri");
}
Model model;
Uri modelUri;
Func <Stream> streamCreator;
if (!models.TryGetValue(uri, out model))
{
var parentResolved = Parent.Resolve(uri, false);
if (parentResolved != null)
{
return(parentResolved);
}
if (loadOnDemand)
{
if (hintPath == null)
{
var locator = Locators.Where(l => l.CanLocate(uri)).FirstOrDefault();
if (locator == null)
{
if (parentResolved != null)
{
return(parentResolved);
}
var e = new UnresolvedModelElementEventArgs(uri);
OnUnresolvedModelElement(e);
return(e.ModelElement);
}
modelUri = locator.GetRepositoryUri(uri);
streamCreator = () => locator.Open(modelUri);
}
else
{
modelUri = uri;
streamCreator = () => File.OpenRead(hintPath);
}
if (!models.TryGetValue(modelUri, out model))
{
using (var stream = streamCreator())
{
model = Serializer.Deserialize(stream, modelUri, this, true);
if (model.RootElements.Count == 1)
{
var ns = model.RootElements[0] as INamespace;
if (ns != null)
{
model.ModelUri = ns.Uri;
if (!models.ContainsKey(ns.Uri))
{
models.Add(ns.Uri, model);
}
}
}
}
}
}
else
{
return(null);
}
}
if (uri.IsAbsoluteUri)
{
var element = model.Resolve(uri.Fragment);
if (element == null)
{
var e = new UnresolvedModelElementEventArgs(uri);
OnUnresolvedModelElement(e);
element = e.ModelElement;
}
return(element);
}
else
{
return(model);
}
}
