210 JDO implementations The ODBMS support provides Versant
OpenFusion JDO by Prism Technologies 211 companies such as Oracle and Sybase, implementing complex data models and resolving the issues related to their use. PrismTech has strongly supported the development of the JDO standard and members of its JDO development team, led by Steve Johnson, have been active participants of the JDO Expert Group. 12.9.2 About OpenFusion JDO OpenFusion JDO is PrismTech s implementation of the JDO specification. It is an implementation for relational data stores only. OpenFusion JDO is written in Java and has been tested on Solaris 8, Linux, Windows NT/4 and Windows 2000. It is also usable on a wide range of Java platforms. OpenFusion JDO supports the mandatory features of the JDO specification as well as some PrismTech additional functionality. The principal features of OpenFusion JDO are: . Automatic creation of mappings from Java Objects to relational databases: a default mapping style of one table per inheritance hierarchy is provided; name and type mappings exposed in XML descriptors; a vendor extension to the persistence descriptor enables indexes for specific fields to be generated. . Support for both datastore and application identity. . Configurable deletion semantics: a PrismTech enhancement that allows developers to specify the behavior of an application when deleting an object; supported options are nullify, no-action and exception. . Simple command line interface: simplifies use easily integrated with IDEs; Apache ant task provided to simplify build management. . Aligned with J2EE Connector Architecture integrates with compliant application servers; enables portable application code across multiple enterprise information server types. . Robust implementation. 12.9.3 Supported data stores. The following data stores are supported: . HSQL, Version 1.61
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