private static Dictionary <string, PropertyData> WriteProperties(EntityChange entityChange)
{
var propertiesData = new Dictionary <string, PropertyData>();
var entityClass = EntityRefUtils.GetClass(entityChange.EntityRef);
foreach (var prop in entityChange.PropertyChanges)
{
var pi = entityClass.GetProperty(prop.PropertyName);
// special handling of extended properties collections
// note that we need to check pi != null because it may represent a field-access "property"
// which has no corresponding .NET property
if (pi != null && AttributeUtils.HasAttribute <ExtendedPropertiesCollectionAttribute>(pi))
{
var extendedProps = WriteExtendedProperties(prop, entityChange.ChangeType);
foreach (var extendedProp in extendedProps)
{
propertiesData.Add(extendedProp.Key, extendedProp.Value);
}
}
else
{
var propertyData = WriteProperty(prop.OldValue, prop.NewValue, entityChange.ChangeType);
propertiesData.Add(prop.PropertyName, propertyData);
}
}
return(propertiesData);
}
/// <summary>
/// Obtains a data-contract instance representing the specified change-set, suitable for
/// transmission and/or serialization to an audit log.
/// </summary>
/// <param name="operationName"></param>
/// <param name="changeSet"></param>
/// <returns></returns>
public static ChangeSetData WriteChangeSet(string operationName, IEnumerable <EntityChange> changeSet)
{
var actionData = from entityChange in changeSet
select new ActionData
{
Type = entityChange.ChangeType.ToString(),
Class = EntityRefUtils.GetClass(entityChange.EntityRef).FullName,
OID = EntityRefUtils.GetOID(entityChange.EntityRef).ToString(),
Version = EntityRefUtils.GetVersion(entityChange.EntityRef),
ChangedProperties = WriteProperties(entityChange)
};
return(new ChangeSetData {
Operation = StringUtilities.EmptyIfNull(operationName), Actions = actionData.ToList()
});
}
/// <summary>
/// Loads the specified entity into this context.
/// </summary>
public Entity Load(EntityRef entityRef, EntityLoadFlags flags)
{
try
{
// use a proxy if EntityLoadFlags.Proxy is specified and EntityLoadFlags.CheckVersion is not specified (CheckVersion overrides Proxy)
var useProxy = (flags & EntityLoadFlags.CheckVersion) == 0 && (flags & EntityLoadFlags.Proxy) == EntityLoadFlags.Proxy;
var entity = (Entity)Load(EntityRefUtils.GetClass(entityRef), EntityRefUtils.GetOID(entityRef), useProxy);
// check version if necessary
if ((flags & EntityLoadFlags.CheckVersion) == EntityLoadFlags.CheckVersion && !EntityRefUtils.GetVersion(entityRef).Equals(entity.Version))
{
throw new EntityVersionException(EntityRefUtils.GetOID(entityRef), null);
}
return(entity);
}
catch (ObjectNotFoundException hibernateException)
{
// note that we will only get here if useProxy == false in the above block
// if the entity is proxied, verification of its existence is deferred until the proxy is realized
throw new EntityNotFoundException(hibernateException);
}
}
