Generation of POJOs and DAOs Classes from Metadata Database



Plain Old Java Objects, Data Access Objects, Object Relational Mapping, Database, Database Management System, Persistence Layer, ORM frameworks, EBNF, ANTLR, XML, METADATA


Implementing the persistence layer is a task that the Object Relational Mapping (ORMs) tools have standardized through diverse frameworks and Application Programming Interfaces (APIs). However, these ORMs and APIs have some inconveniences related to their configuration process and the time and effort it takes to learn them, amongst others. For example, every time a database is used, a configuration process is realized to map the database to obtain Plain Old Java Objects (POJOs) and Data Access Objects (DAOs). In order to overcome those disadvantages, this work contributes by proposing a reusable and extensible process that supports the automatic generation of POJOs and DAOs from database scheme metadata, through the specification of an Extended Backus–Naur Form (EBNF) grammar. A tool named GenPOJO was developed in order to test the process. Unlike the existing ORMs, the proposed process does not require the configuration steps for each database. In addition, GenPOJO does not require time to learn since the only input it receives is a file in XML (eXtensible Markup Language) format containing the database scheme metadata.


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Author Biographies

Juan Rojas, IEEE member

Juan C. Rojas Pérez. Doctor en Ciencias de la Computación por el Centro Nacional de Investigación y Desarrollo Tecnológico (CENIDET), México. Sus áreas de interés son: Patrones de Diseño, Inteligencia de Negocios, Bases de Datos Aplicadas a Ingeniería de Software, Procesamiento de Lenguaje Natural e Ingeniería de Software Aplicada al Big Data.

Olivia Fragoso, TecNM/Centro Nacional de Investigación y Desarrollo Tecnológico

Fragoso Díaz Olivia Graciela. Licenciada en Informática egresada del Instituto Tecnológico de Durango, obtuvo el grado de maestría en UMIST UK en 1995 y el grado de Doctor en 2012 en el Centro Nacional de Investigación y Desarrollo Tecnológico (CENIDET), México. Desde Septiembre de 1995 es investigadora en el área de Ingeniería de Software en CENIDET. Actualmente sus áreas de investigación son: Ingeniería de Software, Tecnologías de Software para E- learning, Reusabilidad del Software, Clasificación y Recuperación de Servicios Web, Calidad de Software y Procesos de Software. Es miembro del Sistema Nacional de Investigadores nivel I y es Senior Member del IEEE desde 2004.

Rene Santaolaya, TecNM/Centro Nacional de Investigación y Desarrollo Tecnológico

Santaolaya Salgado René. Doctor en Ciencias de la Computación por el Centro de Investigación en Computación del Instituto Politécnico Nacional (CIC-IPM), México. Actualmente es investigador del Centro Nacional de Investigación y Desarrollo Tecnológico (CENIDET), México. Es Senior Member del IEEE y es responsable de gestión de negocios de la norma NMX-I-059/02-NYCE-2005. Su área de interés es la Ingeniería de Software, específicamente en: Modelos de Procesos de Software, Reingeniería de Software Legado, Reusabilidad de Software, Arquitecturas de Software, Arquitecturas Orientadas a Servicios, Servicios Web, Microservicios y Aplicaciones Novedosas de TI.

Juan Soto, TecNM/Centro Nacional de Investigación y Desarrollo Tecnológico

Soto Orduño Juan Carlos. Licenciado en Ingeniería de Sistemas Computacionales por el Instituto Tecnológico Superior de Cajeme, Ciudad Obregón, Sonora, México en 2015. Trabajó como analista desarrollador en diferentes compañías en la región noroeste de México. Actualmente es alumno del programa de maestría en ciencias de la computación en el Centro Nacional de Investigación y Desarrollo Tecnológico, Cuernavaca, Morelos, México.


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How to Cite

Rojas, J., Fragoso, O., Santaolaya, R., & Soto, J. (2021). Generation of POJOs and DAOs Classes from Metadata Database. IEEE Latin America Transactions, 18(9), 1547–1554. Retrieved from