Package org.datanucleus.store.rdbms.mapping.datastore

Package containing mappings for datastore (JDBC) types.

See: Description

Interface Summary

Interface	Description
DatastoreMapping	Representation of the mapping of a datastore type.

Class Summary

Class	Description
AbstractDatastoreMapping	Implementation of the mapping of an RDBMS type.
AbstractLargeBinaryRDBMSMapping	Mapping of a large binary (e.g BLOB, LONGVARBINARY) RDBMS type.
BigIntRDBMSMapping	Mapping of a Big Integer RDBMS type.
BinaryStreamRDBMSMapping	Mapping of a BinaryStream RDBMS type.
BitRDBMSMapping	Mapping of a BIT RDBMS type.
BlobImpl	The representation (mapping) in the Java programming language of an SQL BLOB value.
BlobRDBMSMapping	Mapping of a BLOB RDBMS type.
BooleanRDBMSMapping	Mapping of a BOOLEAN RDBMS type.
CharRDBMSMapping	Mapping of a CHAR RDBMS type.
ClobImpl	The mapping in the Java programming language for the SQL CLOB type.
ClobRDBMSMapping	Mapping of a Clob RDBMS type.
DatastoreMappingFactory	Factory class for creating DatastoreMapping instances.
DateRDBMSMapping	Mapping of a DATE RDBMS type.
DB2DatalinkRDBMSMapping	Mapping of a DB2 "Datalink" RDBMS type.
DecimalRDBMSMapping	Mapping of a Decimal RDBMS type.
DoubleRDBMSMapping	Mapping of a DOUBLE RDBMS type.
FloatRDBMSMapping	Mapping of a Float RDBMS type.
IntegerRDBMSMapping	Mapping of a INTEGER RDBMS type.
LongVarBinaryRDBMSMapping	Mapping of a LONGVARBINARY RDBMS type.
LongVarcharRDBMSMapping	Mapping of a Long VARCHAR RDBMS type.
NCharRDBMSMapping	Mapping of a NCHAR RDBMS type.
NumericRDBMSMapping	Mapping of a numeric RDBMS type.
NVarcharRDBMSMapping	Mapping of a NVARCHAR RDBMS type.
OracleBlobRDBMSMapping	Maps a Field to an Oracle BLOB.
OracleClobRDBMSMapping	Mapping for Oracle CLOB type.
OracleXMLTypeRDBMSMapping	Mapping for an Oracle XMLType type.
OtherRDBMSMapping	Mapping of an "OTHER" RDBMS type.
RealRDBMSMapping	Mapping of a REAL RDBMS type.
SmallIntRDBMSMapping	Mapping of a SMALLINT RDBMS type.
SqlXmlRDBMSMapping	Mapping of an SQLXML RDBMS type.
StreamableSpooler	Spooler for files being streamed from the datastore.
TimeRDBMSMapping	Mapping of a TIME RDBMS type.
TimestampRDBMSMapping	Mapping of a TIMESTAMP RDBMS type.
TimesTenVarBinaryRDBMSMapping	Mapping of a VARBINARY RDBMS type for TimesTen database.
TinyIntRDBMSMapping	Mapping of a TINYINT RDBMS type.
VarBinaryRDBMSMapping	Mapping of a VARBINARY RDBMS type.
VarCharRDBMSMapping	Mapping of a VARCHAR RDBMS type.

Package org.datanucleus.store.rdbms.mapping.datastore Description

Package containing mappings for datastore (JDBC) types. These mappings will be mapped via the RDBMSMappingManager to the various java type mappings in org.datanucleus.store.rdbms.mapping.java

These are datastore (JDBC) types, and probably most of them are atomic types mapping to atomic java types

Mappings map persistent java fields in persistable classes to columns in RDBMS tables. Mappings are also used to map "non-fields" in persistable classes to columns in RDBMS tables. A class using datastore identity does not have java fields representing primary-keys in RDBMS tables, but as said ealier a Mapping is also applied to "non-fields". Therefore, a Mapping is applied to:

• persistent java fields
• datastore identity (primary-key columns)
• optimistic columns (columns with version numbers)
• index columns (columns indexing an ordered list)
• owner columns in unidirectional inverse relationships
• adapter columns (additional column added as primary key when the existing columns have datatype not allowed, by database limitation, to be part of the primary key)

In addition to the representation of columns in tables for persistable classes, Mappings are also used for representing fields in queries.