public static Realm GetInstance(RealmConfiguration config = null)
{
config = config ?? RealmConfiguration.DefaultConfiguration;
// TODO cache these initializers but note complications with ObjectClasses
var schemaInitializer = new SchemaInitializerHandle();
if (config.ObjectClasses == null)
{
foreach (var realmObjectClass in RealmObjectClasses)
{
var objectSchemaHandle = GenerateObjectSchema(realmObjectClass);
NativeSchema.initializer_add_object_schema(schemaInitializer, objectSchemaHandle);
}
}
else
{
foreach (var selectedRealmObjectClass in config.ObjectClasses)
{
if (selectedRealmObjectClass.BaseType != typeof(RealmObject))
{
throw new ArgumentException($"The class {selectedRealmObjectClass.FullName} must descend directly from RealmObject");
}
Debug.Assert(RealmObjectClasses.Contains(selectedRealmObjectClass)); // user-specified class must have been picked up by our static ctor
var objectSchemaHandle = GenerateObjectSchema(selectedRealmObjectClass);
NativeSchema.initializer_add_object_schema(schemaInitializer, objectSchemaHandle);
}
}
var schemaHandle = new SchemaHandle(schemaInitializer);
var srHandle = new SharedRealmHandle();
var readOnly = MarshalHelpers.BoolToIntPtr(config.ReadOnly);
var durability = MarshalHelpers.BoolToIntPtr(false);
var databasePath = config.DatabasePath;
IntPtr srPtr = IntPtr.Zero;
try {
srPtr = NativeSharedRealm.open(schemaHandle,
databasePath, (IntPtr)databasePath.Length,
readOnly, durability,
config.EncryptionKey,
config.SchemaVersion);
} catch (RealmMigrationNeededException) {
if (config.ShouldDeleteIfMigrationNeeded)
{
DeleteRealm(config);
}
else
{
throw; // rethrow te exception
//TODO when have Migration but also consider programmer control over auto migration
//MigrateRealm(configuration);
}
// create after deleting old reopen after migrating
srPtr = NativeSharedRealm.open(schemaHandle,
databasePath, (IntPtr)databasePath.Length,
readOnly, durability,
config.EncryptionKey,
config.SchemaVersion);
}
RuntimeHelpers.PrepareConstrainedRegions();
try { /* Retain handle in a constrained execution region */ }
finally
{
srHandle.SetHandle(srPtr);
}
return(new Realm(srHandle, config));
}
internal static extern IntPtr open(SchemaHandle schemaHandle, [MarshalAs(UnmanagedType.LPWStr)] string path, IntPtr pathLength, IntPtr readOnly,
IntPtr durability, byte[] encryptionKey, UInt64 schemaVersion);