| DefaultObjectConverter | Provides a default implementation of ObjectConverter. | 
| FBCachedClob | Clob implementation that is cached client-side. | 
| FBField | Describe class FBFieldhere. | 
| FBFlushableField.CachedObject |  | 
| FBLongVarCharField | This is Blob-based implementation of FBStringField. | 
| FBWorkaroundStringField | Class implementing workaround for "operation was cancelled" bug in server. | 
| JDBC42ObjectConverter | Implementation of ObjectConverterto support JDBC 4.2 type conversions. | 
| JdbcTypeConverter | Helper class to convert from Firebird and metadata type information to JDBC type information. |