Products
DataNucleus Access Platform : Features

DataNucleus is specification driven, not just implementing specifications but also passing whatever specification compatibility (e.g TCK) there is available. The primary features of the DataNucleus Access Platform releases are shown below.

Specification compliance
FeatureSpecVer 1.0Ver 1.1
JDO compliantJDO1, JDO2, JDO2.1
JPA compliantJPA1
JDK required1.3+1.5+


Class Persistence
FeatureSpecVer 1.0Ver 1.1
Byte-Code Enhancement of classesJDO1, JDO2
Byte-Code CompatibilityJDO1
Custom enhancer
Enhancement of Persistence-Aware classesJDO2
Persistent fieldsJDO2, JPA1
Persistent propertiesJDO2.1, JPA1
Annotation supportJDO2.1, JPA1


JDO Functionality
FeatureSpecVer 1.0Ver 1.1
Application identityJDO1, JDO2
Datastore identityJDO1, JDO2
Nondurable identityJDO1, JDO2 * *
Flexible choice of identity generatorsJDO2
Attach/Detach of instancesJDO2
Pessimistic (datastore) transactionsJDO1, JDO2
Optimistic transactionsJDO1, JDO2
Nontransactional ReadJDO1, JDO2
Nontransactional WriteJDO1, JDO2
Retain valuesJDO1, JDO2
Restore valuesJDO1, JDO2
MultithreadedJDO1, JDO2
J2EE IntegrationJDO1, JDO2
Lifecycle listener mechanismJDO2
Level 2 CacheJDO2, JPA2
Level 2 Cache pluggable
XA transactions

(*) = partial support : persistence but not update/delete



JPA Functionality
FeatureSpecVer 1.0Ver 1.1
Persistence APIJPA1
Application identityJPA1
Flexible choice of identity generatorsJPA1
Attach/Detach of instancesJPA1
Optimistic transactionsJPA1
Callback listener mechanismJPA1
Level 2 CacheJPA2
XA transactions


Persistable datatypes
FeatureSpecVer 1.0Ver 1.1
Interfaces supportJDO1, JDO2
Collection supportJDO1, JDO2, JPA1
Set SupportJDO1, JDO2, JPA1
List supportJDO1, JDO2
Map supportJDO1, JDO2, JPA1
Array supportJDO1, JDO2, [JPA1]
Second Class PersistenceCapable objectsJDO1, JDO2
Spatial Type support
User-Defined Type support


Querying Capability
FeatureSpecVer 1.0Ver 1.1
JDOQL Query LanguageJDO1, JDO2
JDOQL Single-String QueryJDO2
JDOQL Extensions
JDOQL SubqueriesJDO2.1
SQL Query LanguageJDO2, JPA1
JPQL Query LanguageJPA1
Named QueriesJDO2, JPA1


Datastore Support
FeatureSpecVer 1.0Ver 1.1
DB4O Datastores
RDBMS Datastores
Support for RDBMS Views
Support for RDBMS Stored Procedures
Schema GenerationJDO2
Existing Schema
Read-Only/Fixed Schema


O/R Mapping Support
FeatureSpecVer 1.0Ver 1.1
1-1 O/R mappingsJDO2, JPA1
1-N O/R mappingsJDO2, JPA1
M-N O/R mappingsJDO2, JPA1
Compound Identity RelationshipsJDO2
"Managed Relationships"
Embedded FieldsJDO2, JPA1
Serialised FieldsJDO2, JPA1
Secondary tablesJDO2, JPA1
Support for BLOB/CLOBJDO1, JDO2, JPA1


Third Party Integration
FeatureSpecVer 1.0Ver 1.1
OSGi bundles
Spring Framework
Tapestry
Ant
Maven1
Maven2
Eclipse
NetBeans
L2 Cache : Oracle Coherence, EHCache, OSCache, SwarmCache
DB Connection Pooling : DBCP, C3P0, Proxool