public DynamicObjectSystem(string connectionString, string storeId)
{
_connectionString = connectionString;
_storeId = storeId;
var dataObjectContext = BrightstarService.GetDataObjectContext(_connectionString);
var dynamicContext = new BrightstarDynamicContext(dataObjectContext);
if (dynamicContext.DoesStoreExist(_storeId))
{
_dynamicStore = dynamicContext.OpenStore(_storeId, new Dictionary<string, string>() { { "ds", UriPrefix } });
}
else
{
_dynamicStore = dynamicContext.CreateStore(_storeId, new Dictionary<string, string>() { { "ds", UriPrefix } });
}
}
private static void Main(string[] args)
{
SamplesConfiguration.Register();
Console.WriteLine("BrightstarDB Dynamic Objects Example");
Console.WriteLine("Creating and populating store using dynamic objects");
// gets a new BrightstarDB DataObjectContext
var dataObjectContext =
BrightstarService.GetDataObjectContext("type=embedded;storesDirectory=" +
SamplesConfiguration.StoresDirectory);
// 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();
Console.WriteLine("Reading dynamic object from BrightstarDB");
// open store and read some data
dynaStore = dynaContext.OpenStore(storeId);
brightstar = dynaStore.GetDataObject(brightstar.Identity);
Console.WriteLine("Got item with identity: {0}", brightstar.Identity);
// property values are ALWAYS collections.
var name = brightstar.name.FirstOrDefault();
Console.WriteLine("\tName = {0}", name);
// property can also be accessed by index
var nameByIndex = brightstar.name[0];
Console.WriteLine("\tName (using indexed property) = {0}", nameByIndex);
// they can be enumerated without a cast
Console.WriteLine("Enumerating rdfs:label values");
foreach (var l in brightstar.rdfs__label)
{
Console.WriteLine("\tLabel = {0}", l);
}
// object relationships are navigated in the same way
Console.WriteLine("Retrieving rdfs:type relationship");
var p = brightstar.rdfs__type.FirstOrDefault();
Console.WriteLine("\tType object ID = {0}", p.Identity);
Console.WriteLine("\tType object label = {0}", p.rdfs__label.FirstOrDefault());
// dynamic objects can also be loaded via sparql
dynaStore = dynaContext.OpenStore(storeId);
Console.WriteLine("Binding SPARQL query to dynamic objects");
var objects = dynaStore.BindObjectsWithSparql("select distinct ?dy where { ?dy ?p ?o }");
foreach (var obj in objects)
{
Console.WriteLine("\tItem Label: {0}", obj.rdfs__label[0]);
}
// Shutdown Brightstar processing threads.
BrightstarService.Shutdown();
Console.WriteLine();
Console.WriteLine("Example complete. Press return to exit.");
Console.ReadLine();
}
public void TestSampleCode()
{
// 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";
// 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);
var id = brightstar.Identity;
brightstar = dynaStore.GetDataObject(id);
// property values are ALWAYS collections.
var name = brightstar.Name.FirstOrDefault();
Console.WriteLine("Name = " + name);
// 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());
Console.ReadLine();
}
private DynamicStore GetDynaStore()
{
var dataObjectContext = BrightstarService.GetDataObjectContext(_connectionString);
var dynaContext = new BrightstarDynamicContext(dataObjectContext);
return dynaContext.OpenStore(_storeName);
}