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Java and .NET embedded database gets upgrade

Posted: 03 Feb 2009     Print Version  Bookmark and Share

Keywords:embedded database  open source  full-text search  search engine 

McObject has rolled out the latest upgrade of its open source, object-oriented embedded database for Java and .NET. Version 4.0 greatly expands Perst's usefulness in a broad range of applications by enabling it to add persistence to any object—including objects created by other programs, those for which source code is unavailable, and even objects created in different programming languages.

Perst 4.0 also adds rich new tools for developing mobile and embedded applications in both Java ME and in Google's Android environment. For Perst Lite (the Java ME edition of Perst), version 4.0 adds seamless integration with the popular EclipseME integrated development environment, as well as improved handling of memory and storage.

In addition, Perst Lite 4.0 adds full-text search capability. To illustrate the use of full-text search, the release also includes a new sample application, with full source code, demonstrating a local search engine that indexes and retrieves contact information stored on Java ME- and Android-based mobile phones.

Past versions of Perst enabled developers to create and manage Java and .NET objects derived from the database system's Persistent class, while benefiting from Perst's high performance, small footprint, and features such as ACID (Atomic, Consistent, Isolated and Durable) transactions, a SQL-like interface and specialised collections classes.

In version 4.0, "foreign" objects or objects derived from any class can be stored in the database, vastly increasing Perst's usability with external programs. As a result, Perst can be added as storage for existing applications such as commercial or open source class frameworks, including GUI classes, object-request brokers, and industry-specific solutions; UML modelling tools that generate classes from wizards; and programs whose source code is not available.

Perst 4.0's enhancements for mobile and embedded application developers include a new example application—called PIMindex for Java ME, and ContactsIndex for Android—that builds on the embedded database's full-text search to provide a local search engine for contact management files on a cell phone or other device.

The example software—which is provided with full source code—could be extended to provide search capabilities for PDF, word processing, HTML and other stored files. Both PIMindex and ContactsIndex are included in the Perst 4.0 for Java distribution (which also includes both Perst and Perst Lite).

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