private static RowEntityTypeWithIDAsKey TryGetEntity(IList<RowEntityTypeWithIDAsKey> collection, RowEntityTypeWithIDAsKey entity)
{
RowEntityTypeWithIDAsKey matchingEntity = null;
foreach (RowEntityTypeWithIDAsKey element in collection)
{
// check if there is not another instance with the same id
if (element.ID == entity.ID)
{
matchingEntity = element;
break;
}
}
return matchingEntity;
}
private static void AddResource(RowEntityTypeWithIDAsKey resource, bool throwIfDuplicate)
{
IList<RowEntityTypeWithIDAsKey> entitySetInstance = GetEntitySet(resource);
foreach (RowEntityTypeWithIDAsKey entity in entitySetInstance)
{
// check if there is not another instance with the same id
if (resource.ID == entity.ID)
{
if (throwIfDuplicate)
{
throw new Exception(String.Format("Entity with the same key already present. EntityType: '{0}'",
resource.GetType().Name));
}
// if its already there, do not add it to the global context
return;
}
}
entitySetInstance.Add(resource);
}
private RowEntityTypeWithIDAsKey DeleteEntity(IList<RowEntityTypeWithIDAsKey> collection, RowEntityTypeWithIDAsKey entity, bool throwIfNotPresent)
{
RowEntityTypeWithIDAsKey entityToBeDeleted = TryGetEntity(collection, entity);
if (entityToBeDeleted == null && throwIfNotPresent)
{
throw new Exception("No entity found with the given ID");
}
if (entityToBeDeleted != null)
{
collection.Remove(entity);
}
return entityToBeDeleted;
}
private static IList<RowEntityTypeWithIDAsKey> GetEntitySet(RowEntityTypeWithIDAsKey entity)
{
if (IsCustomerInstance(entity))
{
return customers;
}
if (IsOrderInstance(entity))
{
return orders;
}
if (IsProductInstance(entity))
{
return products;
}
if (IsRegionInstance(entity))
{
return regions;
}
throw new Exception(String.Format("Unexpected EntityType '{0}' encountered", entity.TypeName));
}
public object ResetResource(object resource)
{
RowEntityTypeWithIDAsKey existingEntity = (RowEntityTypeWithIDAsKey)this.TokenToResource(resource);
RowEntityTypeWithIDAsKey newEntity = new RowEntityTypeWithIDAsKey(existingEntity.TypeName);
newEntity.ID = existingEntity.ID;
DeleteResource(resource);
this.PendingChanges.Add(new KeyValuePair<object, EntityState>(newEntity, EntityState.Added));
return this.ResourceToToken(newEntity);
}
public object CreateResource(string containerName, string fullTypeName)
{
object resource = null;
if (containerName == "Customers")
{
if (fullTypeName == CustomRowBasedContext.CustomerFullName)
{
resource = new RowEntityTypeWithIDAsKey(CustomRowBasedContext.CustomerFullName);
}
if (fullTypeName == CustomRowBasedContext.CustomerWithBirthdayFullName)
{
resource = new RowEntityTypeWithIDAsKey(CustomRowBasedContext.CustomerWithBirthdayFullName);
}
}
else if (containerName == "Orders")
{
if (fullTypeName == CustomRowBasedContext.OrderFullName)
{
resource = new RowEntityTypeWithIDAsKey(CustomRowBasedContext.OrderFullName);
}
}
else if (containerName == "Regions")
{
if (fullTypeName == CustomRowBasedContext.RegionFullName)
{
resource = new RowEntityType(CustomRowBasedContext.RegionFullName);
}
}
else if (fullTypeName == CustomRowBasedContext.AddressFullName)
{
// no need to add this to the pending changelist. Only entities need to be added
return this.ResourceToToken(new RowComplexType(CustomRowBasedContext.AddressFullName));
}
if (resource == null)
{
throw new Exception(String.Format("Invalid container name '{0}' or type name specified '{1}'", containerName, fullTypeName));
}
else
{
this.PendingChanges.Add(new KeyValuePair<object, EntityState>(resource, EntityState.Added));
}
return this.ResourceToToken(resource);
}
public RowEntityTypeWithIDAsKey InsertCustomer(int id, string name)
{
RowEntityTypeWithIDAsKey customer = new RowEntityTypeWithIDAsKey(CustomRowBasedContext.CustomerFullName);
customer.ID = id;
customer.Properties["Name"] = name;
AddResource(customer, true);
return customer;
}
internal static void PopulateData()
{
int orderCount = 2;
int customerCount = 3;
for (int i = 0; i < customerCount; i++)
{
RowEntityTypeWithIDAsKey region = new RowEntityTypeWithIDAsKey(CustomRowBasedContext.RegionFullName);
region.ID = i;
region.Properties["Name"] = "Region" + i.ToString();
regions.Add(region);
RowEntityTypeWithIDAsKey customer = (i % 2 == 0) ? new RowEntityTypeWithIDAsKey(CustomRowBasedContext.CustomerFullName) : new RowEntityTypeWithIDAsKey(CustomRowBasedContext.CustomerWithBirthdayFullName);
customer.ID = i;
customer.Properties["Name"] = "Customer " + i.ToString();
customer.Properties["NameAsHtml"] = "<html><body>" + customer.Properties["Name"] + "</body></html>";
customer.Properties["BestFriend"] = (i == 0) ? null : customers[i - 1];
customer.Properties["Region"] = region;
if (i % 2 != 0)
{
customer.Properties["Birthday"] = DateTime.Today.AddYears(-30);
}
customer.Properties.Add("Orders", new List<RowEntityTypeWithIDAsKey>());
for (int j = 0; j < orderCount; j++)
{
int orderID = i + 100 * j;
int productID = i + 100 * j;
double orderDollarAmount = Math.Round(20.1 + 10.1 * j, 2);
RowEntityTypeWithIDAsKey o = new RowEntityTypeWithIDAsKey(CustomRowBasedContext.OrderFullName) { ID = orderID };
o.Properties["DollarAmount"] = orderDollarAmount;
o.Properties["OrderDetails"] = new List<RowEntityType>();
o.Properties["Customer"] = customer;
((IList<RowEntityTypeWithIDAsKey>)customer.Properties["Orders"]).Add(o);
orders.Add(o);
RowEntityTypeWithIDAsKey p = new RowEntityTypeWithIDAsKey(CustomRowBasedContext.ProductFullName) { ID = productID };
p.Properties["ProductName"] = "Product #" + p.ID.ToString();
p.Properties["Discontinued"] = false;
p.Properties["OrderDetails"] = new List<RowEntityType>();
products.Add(p);
RowEntityType od = new RowEntityType(CustomRowBasedContext.OrderDetailsFullName);
od.Properties["ProductID"] = p.ID;
od.Properties["OrderID"] = o.ID;
od.Properties["UnitPrice"] = orderDollarAmount;
od.Properties["Quantity"] = (short)1;
orderDetails.Add(od);
((IList<RowEntityType>)o.Properties["OrderDetails"]).Add(od);
((IList<RowEntityType>)p.Properties["OrderDetails"]).Add(od);
}
customers.Add(customer);
if (OpenWebDataServiceHelper.EnableBlobServer)
{
DataServiceStreamProvider.Init();
using (System.IO.Stream s = System.IO.File.OpenWrite(DataServiceStreamProvider.GetStoragePath(customer)))
{
byte[] buffer = new byte[] { 1, 2, 3, 4 };
s.Write(buffer, 0, 4);
s.Close();
}
}
}
}
