/// <summary>
/// Attaches the object to the specified context
/// </summary>
/// <param name="context"></param>
/// <param name="overwriteExisting"></param>
public void Attach(EntityContext context, bool overwriteExisting = false)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (!(context is BrightstarEntityContext))
{
throw new ArgumentException(
String.Format("An object of type {0} can only be attached to a context that extends {1}",
GetType().FullName, typeof(BrightstarEntityContext).FullName));
}
if (IsAttached)
{
if (!context.Equals(_context))
{
_context.UntrackObject(this);
}
}
_context = context as BrightstarEntityContext;
if (_identity == null)
{
AssertIdentity();
}
if (DataObject == null && _identity != null)
{
DataObject = _context.GetDataObject(new Uri(_identity), false);
var identityInfo = EntityMappingStore.GetIdentityInfo(GetType());
if (identityInfo != null && identityInfo.EnforceClassUniqueConstraint && !overwriteExisting)
{
_context.EnforceClassUniqueConstraint(_identity, EntityMappingStore.MapTypeToUris(GetType()));
}
foreach (var typeUri in EntityMappingStore.MapTypeToUris(GetType()))
{
if (!String.IsNullOrEmpty(typeUri))
{
var typeDo = _context.GetDataObject(new Uri(typeUri), false);
if (typeDo != null)
{
DataObject.AddProperty(Client.DataObject.TypeDataObject, typeDo);
}
}
}
}
// if (DataObject != null)
// {
_context.TrackObject(this);
// }
if (_currentItemValues != null)
{
foreach (var propertyName in _currentItemValues.Keys.ToList())
{
PropertyInfo p = GetType().GetProperty(propertyName);
p.SetValue(this, _currentItemValues[propertyName], null);
}
_currentItemValues.Clear();
}
}
/// <summary>
/// Raises the PropertyChanged event
/// </summary>
/// <param name="propertyName">The name of the property that has been modified</param>
protected virtual void OnPropertyChanged(string propertyName)
{
var identityInfo = EntityMappingStore.GetIdentityInfo(GetType());
if (identityInfo != null && identityInfo.KeyProperties != null && identityInfo.KeyProperties.Any(p => p.Name.Equals(propertyName)))
{
var newKey = GenerateEntityKey();
SetKey(newKey);
}
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
private string GenerateEntityKey()
{
var identityCacheInfo = EntityMappingStore.GetIdentityInfo(GetType());
if (identityCacheInfo != null && identityCacheInfo.KeyProperties != null)
{
// Generate the key string
var values = new object[identityCacheInfo.KeyProperties.Length];
for (var i = 0; i < identityCacheInfo.KeyProperties.Length; i++)
{
if (!_currentItemValues.TryGetValue(identityCacheInfo.KeyProperties[i].Name, out values[i]))
{
values[i] = identityCacheInfo.KeyProperties[i].GetValue(this, null);
}
}
return(identityCacheInfo.KeyConverter.GenerateKey(values, identityCacheInfo.KeySeparator, GetType()));
}
return(Guid.NewGuid().ToString());
}
internal string GetIdentityBase()
{
var identityCacheInfo = EntityMappingStore.GetIdentityInfo(GetType());
return(identityCacheInfo.BaseUri);
}
