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Feature
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Spec
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Ver 1.0
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Ver 1.1
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Ver 2.0
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Ver 2.1
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Ver 2.2
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Ver 3.0
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JDO2 compliant
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JDO2
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JDO3 compliant
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JDO3
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JPA1 compliant
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JPA1
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JPA2 compliant
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JPA2
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JDK required
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1.3+
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1.5+
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1.5+
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1.5+
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1.5+
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1.5+
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Class Persistence
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Byte-Code Enhancement of classes
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JDO1, JDO2
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Byte-Code Compatibility
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JDO1
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Custom enhancer
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Enhancement of Persistence-Aware classes
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JDO
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Persistent fields
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JDO, JPA
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Persistent properties
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JDO, JPA
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Annotation support
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JDO, JPA
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Metadata API
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JDO
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Enhancer API
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JDO
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Enhancement during compilation
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JDO Functionality
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Application identity
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JDO1, JDO2
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Datastore identity
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JDO1, JDO2
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Nondurable identity [1]
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JDO1, JDO2
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Flexible choice of identity generators
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JDO2
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Attach/Detach of instances
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JDO2
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Pessimistic (datastore) transactions
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JDO1, JDO2
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Optimistic transactions
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JDO1, JDO2
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Nontransactional Read
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JDO1, JDO2
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Nontransactional Write
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JDO1, JDO2
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Retain values
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JDO1, JDO2
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Restore values
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JDO1, JDO2
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Multithreaded PM
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JDO1, JDO2
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J2EE Integration
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JDO1, JDO2
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Lifecycle listener mechanism
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JDO2
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Level 2 Cache
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JDO2, JPA2
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Level 2 Cache pluggable
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XA transactions
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JPA Functionality
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Persistence API
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JPA
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Application identity
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JPA
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Flexible choice of identity generators
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JPA
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Attach/Detach of instances
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JPA
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Optimistic transactions
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JPA
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Callback listener mechanism
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JPA
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Level 2 Cache
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JPA2
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XA transactions
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Persistable Datatypes
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Interfaces support
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JDO1, JDO2
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Collection support
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JDO, JPA
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Set Support
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JDO, JPA
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List support
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JDO, JPA
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Map support
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JDO, JPA
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Array support
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JDO, [JPA]
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Second Class PersistenceCapable objects
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JDO
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Spatial Type support
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User-Defined Type support
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Querying Capability
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JDOQL Query Language
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JDO1, JDO2
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JDOQL Single-String Query
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JDO2
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JDOQL Typesafe Query
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JDO3.1
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JDOQL Extensions
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JDOQL Subqueries
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JDO2.1+
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SQL Query Language
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JDO2, JPA1
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JPQL Query Language
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JPA
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Named Queries
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JDO2, JPA1
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Query Compilation Cache
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Query Results Cache
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Datastore Support
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DB4O Datastores
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NeoDatis Datastores
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Excel Documents
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ODF Documents
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XML Documents
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Google BigTable (AppEngine) datastores
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HBase Datastores
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JSON Datastores
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Amazon S3 Datastores
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Google Storage
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LDAP Datastores
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RDBMS Datastores
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Support for RDBMS Views
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Support for RDBMS Stored Procedures
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Schema Generation (RDBMS)
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JDO2
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Existing Schema
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Read-Only/Fixed Schema
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O/R Mapping Support
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1-1 O/R mappings
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JDO, JPA
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1-N O/R mappings
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JDO, JPA
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M-N O/R mappings
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JDO, JPA
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Compound Identity Relationships
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JDO
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"Managed Relationships"
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JDO
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Embedded Fields
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JDO, JPA
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Serialised Fields
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JDO, JPA
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Secondary tables
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JDO, JPA
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Support for BLOB/CLOB
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JDO, JPA
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Integration/Tooling
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OSGi bundles
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Spring Framework
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Tapestry
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Ant
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Maven2
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Eclipse
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NetBeans
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IntelliJ
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L2 Cache : Oracle Coherence, EHCache, Cacheonix, JCache
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RDBMS Connection Pooling : DBCP, C3P0, Proxool, BoneCP
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[1] = partial support for nondurable identity : persistence but not update/delete
