Aplicação de métodos de análise sintática baseadas em precedência de operadores em software comercial

Abstract

Solutions used in commercial systems must be flexible and simple enough to be able to reduce development and maintenance costs. For this to be achieved, the development and implementation stages must be accompanied by an investigation studying solutions that must meet the expected requirements. Synchro Solu¸c˜oes Fiscais serves several large clients, who handle large amounts of data. A new business demand arose with the need to carry out complex queries, associating several tables in the context of these clients’ databases, which contain the masses of data to be returned. This work focuses on studying the application of parsing methods to implement a flexible interface that meets most of the requirements imposed by Synchro customers, and which was designed to be easily extensible, according to business demands for product evolution. As a solution, a syntactic analysis method using operator precedence was implemented to meet the need for a simple, yet robust and expandable language. The result of the work was a Java package that implements data filters for querying, available to users in a RESTful API.