/// <summary>
/// Gets the EDM model for the given type and request. Override this method to customize the EDM model used for
/// querying.
/// </summary>
/// <param name="elementClrType">The CLR type to retrieve a model for.</param>
/// <param name="request">The request message to retrieve a model for.</param>
/// <param name="actionDescriptor">The action descriptor for the action being queried on.</param>
/// <returns>The EDM model for the given type and request.</returns>
public virtual IEdmModel GetModel(Type elementClrType, HttpRequestMessage request,
HttpActionDescriptor actionDescriptor)
{
// Get model for the request
IEdmModel model = request.ODataProperties().Model;
if (model == null || model.GetEdmType(elementClrType) == null)
{
// user has not configured anything or has registered a model without the element type
// let's create one just for this type and cache it in the action descriptor
model = actionDescriptor.GetEdmModel(elementClrType);
}
Contract.Assert(model != null);
return model;
}
private static ODataQueryContext CreateQueryContext(Type entityClrType, HttpConfiguration configuration, HttpActionDescriptor actionDescriptor)
{
// Primitive types do not construct an EDM model and deal only with the CLR Type
if (TypeHelper.IsQueryPrimitiveType(entityClrType))
{
return new ODataQueryContext(entityClrType);
}
else
{
// Get model for the entire app
IEdmModel model = configuration.GetEdmModel();
if (model == null)
{
// user has not configured anything, now let's create one just for this type
// and cache it in the action descriptor
model = actionDescriptor.GetEdmModel(entityClrType);
Contract.Assert(model != null);
}
// parses the query from request uri
return new ODataQueryContext(model, entityClrType);
}
}
