private OID WriteNonNativeObjectInfo(OID existingOid, NonNativeObjectInfo objectInfo, long position,
bool writeDataInTransaction, bool isNewObject)
{
var lsession = _session;
var cache = lsession.GetCache();
var hasObject = objectInfo.GetObject() != null;
// Checks if object is null,for null objects,there is nothing to do
if (objectInfo.IsNull())
{
return(StorageEngineConstant.NullObjectId);
}
var metaModel = lsession.GetMetaModel();
// first checks if the class of this object already exist in the
// metamodel
if (!metaModel.ExistClass(objectInfo.GetClassInfo().UnderlyingType))
{
_objectWriter.AddClass(objectInfo.GetClassInfo(), true);
}
// if position is -1, gets the position where to write the object
if (position == -1)
{
// Write at the end of the file
position = _objectWriter.FileSystemProcessor.FileSystemInterface.GetAvailablePosition();
// Updates the meta object position
objectInfo.SetPosition(position);
}
// Gets the object id
var oid = existingOid;
if (oid == null)
{
// If, to get the next id, a new id block must be created, then
// there is an extra work
// to update the current object position
if (_objectWriter.GetIdManager().MustShift())
{
oid = _objectWriter.GetIdManager().GetNextObjectId(position);
// The id manager wrote in the file so the position for the
// object must be re-computed
position = _objectWriter.FileSystemProcessor.FileSystemInterface.GetAvailablePosition();
// The oid must be associated to this new position - id
// operations are always out of transaction
// in this case, the update is done out of the transaction as a
// rollback won t need to
// undo this. We are just creating the id
// => third parameter(write in transaction) = false
_objectWriter.GetIdManager().UpdateObjectPositionForOid(oid, position, false);
}
else
{
oid = _objectWriter.GetIdManager().GetNextObjectId(position);
}
}
else
{
// If an oid was passed, it is because object already exist and
// is being updated. So we
// must update the object position
// Here the update of the position of the id must be done in
// transaction as the object
// position of the id is being updated, and a rollback should undo
// this
// => third parameter(write in transaction) = true
_objectWriter.GetIdManager().UpdateObjectPositionForOid(oid, position, true);
// Keep the relation of id and position in the cache until the
// commit
cache.SavePositionOfObjectWithOid(oid, position);
}
// Sets the oid of the object in the inserting cache
cache.UpdateIdOfInsertingObject(objectInfo.GetObject(), oid);
// Only add the oid to unconnected zone if it is a new object
if (isNewObject)
{
cache.AddOIDToUnconnectedZone(oid);
}
objectInfo.SetOid(oid);
if (objectInfo.GetClassInfo() == null || objectInfo.GetClassInfo().ClassInfoId == null)
{
if (objectInfo.GetClassInfo() != null)
{
var clinfo =
_storageEngine.GetSession().GetMetaModel().GetClassInfo(
objectInfo.GetClassInfo().FullClassName, true);
objectInfo.SetClassInfo(clinfo);
}
else
{
throw new OdbRuntimeException(NDatabaseError.UndefinedClassInfo.AddParameter(objectInfo.ToString()));
}
}
// updates the meta model - If class already exist, it returns the
// metamodel class, which contains
// a bit more informations
var classInfo = _objectWriter.AddClass(objectInfo.GetClassInfo(), true);
objectInfo.SetClassInfo(classInfo);
//
if (isNewObject)
{
_objectWriter.ManageNewObjectPointers(objectInfo, classInfo);
}
_objectWriter.FileSystemProcessor.FileSystemInterface.SetWritePosition(position, writeDataInTransaction);
objectInfo.SetPosition(position);
var nbAttributes = objectInfo.GetClassInfo().Attributes.Count;
// compute the size of the array of byte needed till the attibute
// positions
// BlockSize + Block Type + OID + ClassOid + PrevOid + NextOid + CreatDate + UpdateDate + objectVersion + NbAttributes + RefCoutner + IsRoot
// Int + Byte + Long + Long + Long + Long + Long + Long + int + int + long + byte
// 6 Longs + 3Ints + Byte
var tsize = 7 * OdbType.SizeOfLong + 3 * OdbType.SizeOfInt + 2 * OdbType.SizeOfByte;
var bytes = new byte[tsize];
// Block size
IntToByteArray(0, bytes, 0);
// Block type
bytes[4] = BlockTypes.BlockTypeNonNativeObject;
// The object id
EncodeOid(oid, bytes, 5);
// Class info id
LongToByteArray(classInfo.ClassInfoId.ObjectId, bytes, 13);
// previous instance
EncodeOid(objectInfo.GetPreviousObjectOID(), bytes, 21);
// next instance
EncodeOid(objectInfo.GetNextObjectOID(), bytes, 29);
// creation date, for update operation must be the original one
LongToByteArray(objectInfo.GetHeader().GetCreationDate(), bytes, 37);
LongToByteArray(OdbTime.GetCurrentTimeInTicks(), bytes, 45);
IntToByteArray(objectInfo.GetHeader().GetObjectVersion(), bytes, 53);
LongToByteArray(objectInfo.GetHeader().RefCounter, bytes, 57);
BooleanToByteArray(objectInfo.GetHeader().IsRoot, bytes, 65);
// now write the number of attributes and the position of all
// attributes, we do not know them yet, so write 00 but at the end of the write operation
// These positions will be updated The positions that is going to be written are 'int' representing
// the offset position of the attribute first write the number of attributes
IntToByteArray(nbAttributes, bytes, 66);
// Then write the array of bytes
_objectWriter.FileSystemProcessor.FileSystemInterface.WriteBytes(bytes, writeDataInTransaction);
// Store the position
var attributePositionStart = _objectWriter.FileSystemProcessor.FileSystemInterface.GetPosition();
var attributeSize = OdbType.SizeOfInt + OdbType.SizeOfLong;
var abytes = new byte[nbAttributes * (attributeSize)];
// here, just write an empty (0) array, as real values will be set at
// the end
_objectWriter.FileSystemProcessor.FileSystemInterface.WriteBytes(abytes, writeDataInTransaction);
var attributesIdentification = new long[nbAttributes];
var attributeIds = new int[nbAttributes];
// Puts the object info in the cache
// storageEngine.getSession().getCache().addObject(position,
// aoi.getObject(), objectInfo.getHeader());
var maxWritePosition = _objectWriter.FileSystemProcessor.FileSystemInterface.GetPosition();
// Loop on all attributes
for (var i = 0; i < nbAttributes; i++)
{
// Gets the attribute meta description
var classAttributeInfo = classInfo.GetAttributeInfo(i);
// Gets the id of the attribute
attributeIds[i] = classAttributeInfo.GetId();
// Gets the attribute data
var aoi2 = objectInfo.GetAttributeValueFromId(classAttributeInfo.GetId());
if (aoi2 == null)
{
// This only happens in 1 case : when a class has a field with
// the same name of one of is superclass. In this, the deeper
// attribute is null
if (classAttributeInfo.IsNative())
{
aoi2 = new NullNativeObjectInfo(classAttributeInfo.GetAttributeType().Id);
}
else
{
aoi2 = new NonNativeNullObjectInfo(classAttributeInfo.GetClassInfo());
}
}
if (aoi2.IsNative())
{
var nativeAttributePosition = _objectWriter.InternalStoreObject((NativeObjectInfo)aoi2);
// For native objects , odb stores their position
attributesIdentification[i] = nativeAttributePosition;
}
else
{
OID nonNativeAttributeOid;
if (aoi2.IsObjectReference())
{
var or = (ObjectReference)aoi2;
nonNativeAttributeOid = or.GetOid();
}
else
{
nonNativeAttributeOid = _objectWriter.StoreObject(null, (NonNativeObjectInfo)aoi2);
}
// For non native objects , odb stores its oid as a negative
// number!!u
if (nonNativeAttributeOid != null)
{
attributesIdentification[i] = -nonNativeAttributeOid.ObjectId;
}
else
{
attributesIdentification[i] = StorageEngineConstant.NullObjectIdId;
}
}
var p = _objectWriter.FileSystemProcessor.FileSystemInterface.GetPosition();
if (p > maxWritePosition)
{
maxWritePosition = p;
}
}
// Updates attributes identification in the object info header
objectInfo.GetHeader().SetAttributesIdentification(attributesIdentification);
objectInfo.GetHeader().SetAttributesIds(attributeIds);
var positionAfterWrite = maxWritePosition;
// Now writes back the attribute positions
_objectWriter.FileSystemProcessor.FileSystemInterface.SetWritePosition(attributePositionStart, writeDataInTransaction);
abytes = new byte[attributesIdentification.Length * (attributeSize)];
for (var i = 0; i < attributesIdentification.Length; i++)
{
IntToByteArray(attributeIds[i], abytes, i * attributeSize);
LongToByteArray(attributesIdentification[i], abytes,
i * (attributeSize) + OdbType.SizeOfInt);
// fsi.writeInt(attributeIds[i], writeDataInTransaction, "attr id");
// fsi.writeLong(attributesIdentification[i],
// writeDataInTransaction, "att real pos",
// WriteAction.DATA_WRITE_ACTION);
// if (classInfo.getAttributeInfo(i).isNonNative() &&
// attributesIdentification[i] > 0) {
if (objectInfo.GetAttributeValueFromId(attributeIds[i]).IsNonNativeObject() &&
attributesIdentification[i] > 0)
{
throw new OdbRuntimeException(
NDatabaseError.NonNativeAttributeStoredByPositionInsteadOfOid.AddParameter(
classInfo.GetAttributeInfo(i).GetName()).AddParameter(classInfo.FullClassName).
AddParameter(attributesIdentification[i]));
}
}
_objectWriter.FileSystemProcessor.FileSystemInterface.WriteBytes(abytes, writeDataInTransaction);
_objectWriter.FileSystemProcessor.FileSystemInterface.SetWritePosition(positionAfterWrite, writeDataInTransaction);
var blockSize = (int)(positionAfterWrite - position);
WriteBlockSizeAt(position, blockSize, writeDataInTransaction, objectInfo);
// Only insert in index for new objects
if (isNewObject)
{
// insert object id in indexes, if exist
_objectWriter.ManageIndexesForInsert(oid, objectInfo);
var value = hasObject
? objectInfo.GetObject()
: objectInfo;
_triggerManager.ManageInsertTriggerAfter(objectInfo.GetClassInfo().UnderlyingType, value, oid);
}
return(oid);
}