The ObjectStore database system
Communications of the ACM
The GemStone object database management system
Communications of the ACM
SIGMOD '93 Proceedings of the 1993 ACM SIGMOD international conference on Management of data
Microsoft ODBC 2.0 programmer's reference and SDK guide: for the Microsoft Windows and Windows NT operating systems
Automated support for seamless interoperability in polylingual software systems
SIGSOFT '96 Proceedings of the 4th ACM SIGSOFT symposium on Foundations of software engineering
The ODMG object model: does it make sense?
Proceedings of the 12th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications
COM and DCOM: Microsoft's vision for distributed objects
COM and DCOM: Microsoft's vision for distributed objects
Object databases in practice
BYTE
The object data standard: ODMG 3.0
The object data standard: ODMG 3.0
Jdbc Database Access with Java: A Tutorial and Annotated Reference
Jdbc Database Access with Java: A Tutorial and Annotated Reference
Toward Pure Polylingual Persistence
POS-9 Revised Papers from the 9th International Workshop on Persistent Object Systems
IWSSD '98 Proceedings of the 9th international workshop on Software specification and design
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Many Object-Oriented Databases (OODBs) use programming languages that predate Java, such as C++, CLOS and Smalltalk. Thus, there is a growing need for interoperating these OODBs with new applications that require Java. Unfortunately, there are few mechanisms that allow software developers to easily integrate Java applications with non-Java OODBs. Although various interoperability mechanisms have been developed over the years, these approaches have some significant drawbacks in practice. They are often difficult to use, provide little, if any, automated support, and produce software that is difficult to engineer and maintain. In this paper, we describe an interoperability approach that allows application developers to seamlessly and transparently access non-Java OODBs from Java applications. We first present JOQL, a Java-based object query language that we are developing. JOQL queries are embedded in Java applications and are used to perform queries over C++-based OODBs. We also describe an accompanying toolset that processes Java programs containing JOQL queries. The toolset produces all the necessary code allowing Java applications to access and manipulate a C++-based OODB. As a result, application developers are free to work in Java without having to concern themselves with the details of interoperating with C++. Finally, we provide some preliminary experimental data that demonstrates our approach incurs a reasonable performance overhead.