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Parametric Polymorphism and Orthogonal Persistence

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Objects and Databases (SODB 2000)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 1944))

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Abstract

Parametric classes come with non-trivial subtleties even in the paradigm of orthogonal persistence. Orthogonal persistence guaran- tees that objects of any type, including class objects, may persist. But a parametric class is not a Java type, and its class object does not exist. Further subtleties in the Java technology extended with orthogonal per- sistence are caused by the existence of both the persistent store and Java class files. Neither store was designed with parametric classes in mind. This paper presents a technique for implementing parametric classes in the Java technology extended with orthogonal persistence. The techni- que is based on a suitable representation of a parametric class as a Java class file, an extended class loader which handles instantiation of such a class, and an extension of the Java Core Reflection classes. Extending these final classes is a non-trivial experiment and requires complete re- compilation of the Java system. The overall effect amounts to a new Java Virtual Machine that extends the standard one. However, this extension does not affect correct performance of Java programs.

This material is based upon work supported by the NSF under grant number IIS- 9811452.

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Authors and Affiliations

  1. Department of Computer Science, Wichita State University, KS 67260-0083, Wichita, USA

    Suad Alagić & Tuong Nguyen

Authors
  1. Suad Alagić
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  2. Tuong Nguyen
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Editor information

Editors and Affiliations

  1. Department of Computer Science, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland

    Klaus Dittrich

  2. Dipartimento di Informatica e Scienze dell’Informazione, Università di Genova, via Dodecaneso 35, 16146, Genova, Italy

    Giovanna Guerrini  & Isabella Merlo  & 

  3. Departament d ′Informàtica i Enginyeria Industrial, Universitat de Lleida, C.Jaume II,69, 25001, Lleida, Spain

    Marta Oliva

  4. Departament de Llenguatges i Sistemes Informàtics, Universitat Politècnica de Catalunya, MÒdul C 6,C.Jordi Girona Salgado 1-3, 08034, Barcelona, Spain

    M.Elena Rodriguez

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© 2001 Springer-Verlag Berlin Heidelberg

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Alagić, S., Nguyen, T. (2001). Parametric Polymorphism and Orthogonal Persistence. In: Dittrich, K., Guerrini, G., Merlo, I., Oliva, M., Rodriguez, M. (eds) Objects and Databases. SODB 2000. Lecture Notes in Computer Science, vol 1944. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44677-X_2

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  • DOI: https://doi.org/10.1007/3-540-44677-X_2

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-41664-7

  • Online ISBN: 978-3-540-44677-4

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