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Compiler Plugins Can Handle Nested Languages: AST-Level Expansion of LINQ Queries for Java

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Object Databases (ICOODB 2009)

Part of the book series: Lecture Notes in Computer Science ((LNISA,volume 5936))

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Abstract

The integration of database and programming languages is made difficult by the different data models and type systems prevalent in each field. Functional-object query languages contribute to bridge this gap by letting software developers write declarative queries without imposing any specific execution strategy. Although some query optimizers support this paradigm, Java provides no means to embed queries in a seamless and typesafe manner. Interestingly, the benefits of such grammar extension (compile-time type inference and checking, user-friendly syntax) can alternatively be achieved with a compiler plugin as discussed in this paper for the LINQ query language and two Java compilers (from Sun and Eclipse). A prototype confirms the benefits of the approach by automating at compile-time (a) the parsing of LINQ queries nested in Java, (b) their analysis for well-formedness, and (c) their rewriting into statements to build Abstract Syntax Trees (ASTs). The technique is also applicable to other languages (JPQL, XQuery) which are handled nowadays by a Java compiler as uninterpreted strings, being thus prone to runtime exceptions due to breaches of static semantics.

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Author information

Authors and Affiliations

  1. Institute for Software Systems (STS), Hamburg University of Technology (TUHH), Germany

    Miguel Garcia

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  1. Miguel Garcia
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Editors and Affiliations

  1. Institute for Information Systems, ETH Zurich, 8092, Zurich, Switzerland

    Moira C. Norrie

  2. Dipartimento di Elettronica e Informazione, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milano, Italy

    Michael Grossniklaus

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Garcia, M. (2010). Compiler Plugins Can Handle Nested Languages: AST-Level Expansion of LINQ Queries for Java. In: Norrie, M.C., Grossniklaus, M. (eds) Object Databases. ICOODB 2009. Lecture Notes in Computer Science, vol 5936. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-14681-7_3

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  • DOI: https://doi.org/10.1007/978-3-642-14681-7_3

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-14680-0

  • Online ISBN: 978-3-642-14681-7

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