Access to persistent data is a requirement for the majority of computer applications. The Java programming language and associated run-time environment provide excellent features for the construction of reliable and robust applications, but currently these do not extend to the domain of persistent data. Many mechanisms for managing persistent data have been proposed, some of which are now included in the standard Java platforms, e.g., J2SE and J2EE. This paper defines a set of criteria by which persistence mechanisms may be compared and then applies the criteria to a representative set of widely used mechanisms.
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