public override IExternalBlobConnection GetConnection()
{
IExternalBlobConnection connectionFrom = _from.GetConnection();
IExternalBlobConnection connectionTo = _to.GetConnection();
return(new MigrationConnection(connectionFrom, connectionTo));
}
public override void NullSafeSet(DbCommand cmd, object value, int index, ISessionImplementor session)
{
if (value == null)
{
((IDataParameter)cmd.Parameters[index]).Value = DBNull.Value;
}
else
{
IExternalBlobConnection conn = GetExternalBlobConnection(session);
IExternalBlobConnection blobconn;
byte[] payload;
if (!ExtractLobData(value, out blobconn, out payload) || !conn.Equals(blobconn)) // Skip writing if an equal connection is used
{
using (ExternalBlobWriter writer = conn.OpenWriter())
{
WriteLobTo(value, writer);
payload = writer.Commit();
var persistedLob = ((IPersistedLob)value);
if (!persistedLob.IsPersisted)
{
((IPersistedLob)value).SetPersistedIdentifier(payload, conn);
}
}
}
((IDataParameter)cmd.Parameters[index]).Value = payload;
}
}
public ExternalBlob(IExternalBlobConnection connection, byte[] identifier)
{
if (connection == null) throw new ArgumentNullException("connection");
if (identifier == null) throw new ArgumentNullException("identifier");
this.connection = connection;
this.identifier = identifier;
}
bool IExternalBlobConnection.Equals(IExternalBlobConnection connection)
{
if (connection is ExternalBlobDbConnectionWrapper)
{
connection = (connection as ExternalBlobDbConnectionWrapper)._externalConnection;
}
return(_externalConnection.Equals(connection));
}
public ExternalClob(IExternalBlobConnection connection, byte[] identifier, Encoding encoding)
{
if (connection == null) throw new ArgumentNullException("connection");
if (identifier == null) throw new ArgumentNullException("identifier");
if (encoding == null) throw new ArgumentNullException("encoding");
this.connection = connection;
this.identifier = identifier;
this.encoding = encoding;
}
public ExternalXlob(IExternalBlobConnection connection, byte[] identifier, IXmlCompressor compression)
{
if (connection == null) throw new ArgumentNullException("connection");
if (identifier == null) throw new ArgumentNullException("identifier");
if (compression == null) throw new ArgumentNullException("compression");
_connection = connection;
_identifier = identifier;
_compression = compression;
}
public override bool Equals(IExternalBlobConnection connection)
{
var c = connection as FileSystemCasConnection;
if (c == null)
{
return(false);
}
return(_path.Equals(c._path) && _hashName == c._hashName);
}
public override object NullSafeGet(DbDataReader rs, string name, ISessionImplementor session, object owner)
{
int index = rs.GetOrdinal(name);
if (rs.IsDBNull(index))
{
return(null);
}
IExternalBlobConnection conn = GetExternalBlobConnection(session);
byte[] payload;
if (conn.BlobIdentifierLength == Int32.MaxValue)
{
var length = (int)rs.GetBytes(index, 0L, null, 0, 0);
payload = new byte[length];
// The if here makes MySql happy (See https://nhibernate.jira.com/browse/NH-2096 for details)
if (length > 0)
{
rs.GetBytes(index, 0L, payload, 0, length);
}
}
else
{
payload = new byte[conn.BlobIdentifierLength];
// The if here makes MySql happy (See https://nhibernate.jira.com/browse/NH-2096 for details)
if (payload.Length > 0)
{
var i = (int)rs.GetBytes(index, 0, payload, 0, payload.Length);
if (i != payload.Length)
{
if (Logger.IsErrorEnabled())
{
Logger.Error("Unknown payload (identifier) length. Recieved {0} but expected {1} bytes for owner: {2}", i, payload.Length, owner);
}
return(null);
}
}
else
{
if (Logger.IsErrorEnabled())
{
Logger.Error("Unknown payload (identifier) length. Recieved 0 but expected {0} bytes for owner: {1}", payload.Length, owner);
}
return(null);
}
}
return(CreateLobInstance(conn, payload));
}
public override object Assemble(object cached, ISessionImplementor session, object owner)
{
var payload = cached as byte[];
if (payload == null)
{
return(null);
}
IExternalBlobConnection conn = GetExternalBlobConnection(session);
return(CreateLobInstance(conn, payload));
}
protected override bool ExtractLobData(object lob, out IExternalBlobConnection connection, out byte[] identifier)
{
ExternalClob clob = lob as ExternalClob;
if (clob == null)
{
connection = null;
identifier = null;
return false;
}
connection = clob.Connection;
identifier = clob.Identifier;
return true;
}
public ExternalBlob(IExternalBlobConnection connection, byte[] identifier)
{
if (connection == null)
{
throw new ArgumentNullException("connection");
}
if (identifier == null)
{
throw new ArgumentNullException("identifier");
}
_connection = connection;
_identifier = identifier;
}
public ExternalXlob(IExternalBlobConnection connection, byte[] identifier, IXmlCompressor compression)
{
if (connection == null)
{
throw new ArgumentNullException("connection");
}
if (identifier == null)
{
throw new ArgumentNullException("identifier");
}
if (compression == null)
{
throw new ArgumentNullException("compression");
}
_connection = connection;
_identifier = identifier;
_compression = compression;
}
public ExternalClob(IExternalBlobConnection connection, byte[] identifier, Encoding encoding)
{
if (connection == null)
{
throw new ArgumentNullException("connection");
}
if (identifier == null)
{
throw new ArgumentNullException("identifier");
}
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
_connection = connection;
_identifier = identifier;
_encoding = encoding;
}
public override object Disassemble(object value, ISessionImplementor session, object owner)
{
if (value == null)
{
return(null);
}
IExternalBlobConnection blobconn;
byte[] payload;
bool hasExternalLob = ExtractLobData(value, out blobconn, out payload);
IExternalBlobConnection conn = GetExternalBlobConnection(session);
if (conn.DisassembleRequiresExternalBlob && !hasExternalLob)
{
throw new Exception("Unable to cache an unsaved lob.");
}
return(payload);
}
protected override bool ExtractLobData(object lob, out IExternalBlobConnection connection, out byte[] identifier)
{
var blob = lob as ExternalBlob;
if (blob == null)
{
var persistedLob = lob as IPersistedLob;
if (persistedLob != null && persistedLob.IsPersisted)
{
identifier = persistedLob.GetPersistedIdentifier();
connection = (IExternalBlobConnection) persistedLob.GetExternalStore();
return true;
}
connection = null;
identifier = null;
return false;
}
connection = blob.Connection;
identifier = blob.Identifier;
return true;
}
protected override bool ExtractLobData(object lob, out IExternalBlobConnection connection, out byte[] identifier)
{
var xlob = lob as ExternalXlob;
if (xlob == null)
{
var persistedLob = lob as IPersistedLob;
if (persistedLob != null && persistedLob.IsPersisted)
{
identifier = persistedLob.GetPersistedIdentifier();
connection = (IExternalBlobConnection)persistedLob.GetExternalStore();
return(true);
}
connection = null;
identifier = null;
return(false);
}
connection = xlob.Connection;
identifier = xlob.Identifier;
return(true);
}
public bool Equals(IExternalBlobConnection connection)
{
return(_from.Equals(connection));
}
public MigrationConnection(IExternalBlobConnection from, IExternalBlobConnection to)
{
_from = from;
_to = to;
}
public ExternalClob(IExternalBlobConnection connection, byte[] identifier, Encoding encoding, IStreamCompressor compression) : this(connection, identifier, encoding)
{
this.compression = compression;
}
protected override object CreateLobInstance(IExternalBlobConnection connection, byte[] payload)
{
return(new ExternalXlob(connection, payload, _compression));
}
protected abstract object CreateLobInstance(IExternalBlobConnection connection, byte[] payload);
public override bool Equals(IExternalBlobConnection connection)
{
var c = connection as FileSystemCasConnection;
if (c == null) return false;
return _path.Equals(c._path) && _hashName == c._hashName;
}
public ExternalBlobDbConnectionWrapper(DbConnection db, IExternalBlobConnection externalConnection)
{
_db = db;
_externalConnection = externalConnection;
}
protected override object CreateLobInstance(IExternalBlobConnection connection, byte[] identifier)
{
return new ExternalClob(connection, identifier, encoding, compression);
}
public abstract bool Equals(IExternalBlobConnection connection);
public bool Equals(IExternalBlobConnection connection)
{
return _from.Equals(connection);
}
protected override object CreateLobInstance(IExternalBlobConnection connection, byte[] payload)
{
return new ExternalBlob(connection, payload, _compression);
}
protected abstract object CreateLobInstance(IExternalBlobConnection connection, byte[] identifier);
public ExternalBlobDbConnectionWrapper(IDbConnection db, IExternalBlobConnection externalConnection)
{
_db = db;
_externalConnection = externalConnection;
}
public override bool Equals(IExternalBlobConnection connection)
{
return connection is ByteArrayConnection;
}
public ExternalBlob(IExternalBlobConnection connection, byte[] identifier, IStreamCompressor compression)
: this(connection, identifier)
{
_compression = compression;
}
public ExternalBlobDbConnectionWrapper(IDbConnection db, IExternalBlobConnection cas)
{
_db = db;
_cas = cas;
}
public abstract bool Equals(IExternalBlobConnection connection);
bool IExternalBlobConnection.Equals(IExternalBlobConnection connection)
{
if (connection is ExternalBlobDbConnectionWrapper) connection = (connection as ExternalBlobDbConnectionWrapper)._cas;
return _cas.Equals(connection);
}
public override bool Equals(IExternalBlobConnection connection)
{
return(connection is ByteArrayConnection);
}
public ExternalBlob(IExternalBlobConnection connection, byte[] identifier, IStreamCompressor compression) : this(connection, identifier)
{
_compression = compression;
}
protected abstract bool ExtractLobData(object lob, out IExternalBlobConnection connection, out byte[] identifier);
protected abstract object CreateLobInstance(IExternalBlobConnection connection, byte[] payload);
protected abstract bool ExtractLobData(object lob, out IExternalBlobConnection connection, out byte[] identifier);
public MigrationConnection(IExternalBlobConnection from, IExternalBlobConnection to)
{
_from = from;
_to = to;
}