BrightstarDB dynamic Sample

dynamic-sample.cs

// gets a new BrightstarDB DataObjectContext
var dataObjectContext = BrightstarService.GetDataObjectContext();

// create a dynamic context
var dynaContext = new BrightstarDynamicContext(dataObjectContext);

// open a new store
var storeId = "DynamicSample" + Guid.NewGuid().ToString();
var dynaStore = dynaContext.CreateStore(storeId);

// create some dynamic objects. 
dynamic brightstar = dynaStore.MakeNewObject();
dynamic product = dynaStore.MakeNewObject();

// set some properties
brightstar.name = "BrightstarDB";
product.rdfs__label = "Product";
var id = brightstar.Identity;

// use namespace mapping (RDF and RDFS are defined by default)
// Assigning a list creates repeated RDF properties.
brightstar.rdfs__label = new[] { "BrightstarDB", "NoSQL Database" };

// objects are connected together in the same way
brightstar.rdfs__type = product;

dynaStore.SaveChanges();

// open store and read some data
dynaStore = dynaContext.OpenStore(storeId);
brightstar = dynaStore.GetDataObject(brightstar.Identity);

// property values are ALWAYS collections.
var name = brightstar.name.FirstOrDefault();
Console.WriteLine("Name = " + name);

// property can also be accessed by index
var nameByIndex = brightstar.name[0];
Console.WriteLine("Name = " + nameByIndex);

// they can be enumerated without a cast
foreach (var l in brightstar.rdfs__label)
{
    Console.WriteLine("Label = " + l);
}

// object relationships are navigated in the same way
var p = brightstar.rdfs__type.FirstOrDefault();
Console.WriteLine(p.rdfs__label.FirstOrDefault());

// dynamic objects can also be loaded via sparql
dynaStore = dynaContext.OpenStore(storeId);
var objects = dynaStore.BindObjectsWithSparql("select distinct ?dy where { ?dy ?p ?o }");
foreach (var obj in objects)
{
   Console.WriteLine(obj.rdfs__label[0]);
}