/// <exception cref="Db4objects.Db4o.Ext.Db4oIOException"></exception>
private UUIDFieldMetadata.DatabaseIdentityIDAndUUID ReadDatabaseIdentityIDAndUUID
(ObjectContainerBase container, ClassMetadata classMetadata, Slot oldSlot, bool
checkClass)
{
if (DTrace.enabled)
{
DTrace.RereadOldUuid.LogLength(oldSlot.Address(), oldSlot.Length());
}
ByteArrayBuffer reader = container.DecryptedBufferByAddress(oldSlot.Address(), oldSlot
.Length());
if (checkClass)
{
ClassMetadata realClass = ClassMetadata.ReadClass(container, reader);
if (realClass != classMetadata)
{
return(null);
}
}
if (classMetadata.SeekToField(container.Transaction, reader, this) == HandlerVersion
.Invalid)
{
return(null);
}
return(new UUIDFieldMetadata.DatabaseIdentityIDAndUUID(reader.ReadInt(), reader.ReadLong
()));
}
public long ReadLong()
{
long value = _source.ReadLong();
_target.IncrementOffset(Const4.LongLength);
return(value);
}
public override object ReadLong(ByteArrayBuffer buffer)
{
long value = buffer.ReadLong();
if (value == long.MaxValue)
{
return null;
}
return value;
}
public override DateTime ReadDate(ByteArrayBuffer bytes)
{
long value = bytes.ReadLong();
if (value == long.MaxValue)
{
return MarshallingConstants0.NullDate;
}
return new DateTime(value);
}
public virtual void ReadThis(ByteArrayBuffer buffer)
{
SystemData().ConverterVersion(buffer.ReadInt());
SystemData().FreespaceSystem(buffer.ReadByte());
buffer.ReadInt();
// was BTreeFreespaceId, converted to slot, can no longer be used
SystemData().IdentityId(buffer.ReadInt());
SystemData().LastTimeStampID(buffer.ReadLong());
SystemData().UuidIndexId(buffer.ReadInt());
}
protected virtual void CheckThreadFileLock(LocalObjectContainer container, ByteArrayBuffer
reader)
{
reader.Seek(AccessTimeOffset);
long lastAccessTime = reader.ReadLong();
if (FileHeader.LockedByOtherSession(container, lastAccessTime))
{
_timerFileLock.CheckIfOtherSessionAlive(container, 0, AccessTimeOffset, lastAccessTime
);
}
}
internal override object Read1(ByteArrayBuffer a_bytes)
{
return a_bytes.ReadLong();
}
public override object ReadLong(ByteArrayBuffer buffer)
{
return buffer.ReadLong();
}
public override DateTime ReadDate(ByteArrayBuffer bytes)
{
return new DateTime(bytes.ReadLong());
}
public object ReadIndexEntry(IContext context, ByteArrayBuffer reader)
{
return new IndexEntry(reader.ReadInt(), reader.ReadLong());
}
public static double UnmarshalDouble(ByteArrayBuffer buffer)
{
return Platform4.LongToDouble(buffer.ReadLong());
}
public virtual object ReadIndexEntry(IContext context, ByteArrayBuffer reader)
{
return new CommitTimestampSupport.TimestampEntry(reader.ReadInt(), reader.ReadLong
());
}
public virtual object ReadIndexEntry(IContext context, ByteArrayBuffer reader)
{
return(new CommitTimestampSupport.TimestampEntry(reader.ReadInt(), reader.ReadLong
()));
}
private bool CheckSumOK(ByteArrayBuffer buffer, int offset)
{
int initialOffSet = buffer.Offset();
int length = OwnLength();
length -= ChecksumLength;
buffer.Seek(offset);
long readCheckSum = buffer.ReadLong();
int checkSumBeginOffset = buffer.Offset();
byte[] bytes = buffer._buffer;
long calculatedCheckSum = CRC32.CheckSum(bytes, checkSumBeginOffset, length);
buffer.Seek(initialOffSet);
return calculatedCheckSum == readCheckSum;
}
protected virtual void ReadBuffer(ByteArrayBuffer buffer, bool versionsAreConsistent
)
{
buffer.IncrementOffset(ChecksumLength);
SystemData systemData = SystemData();
systemData.IdSystemSlot(ReadSlot(buffer, false));
systemData.InMemoryFreespaceSlot(ReadSlot(buffer, !versionsAreConsistent));
systemData.BTreeFreespaceId(buffer.ReadInt());
systemData.ConverterVersion(buffer.ReadInt());
systemData.UuidIndexId(buffer.ReadInt());
systemData.IdentityId(buffer.ReadInt());
systemData.LastTimeStampID(buffer.ReadLong());
systemData.FreespaceSystem(buffer.ReadByte());
}