A query for persistent Java objects is typesafe if a compiler can verify it for syntactic correctness. Version 2.0 of the Java Persistence API (JPA) introduces the Criteria API, which brings the power of typesafe queries to Java applications for the first time and provides a mechanism for constructing queries dynamically at run time. This article describes how to write dynamic, typesafe queries using the Criteria API and the closely associated Metamodel API.

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