Pavel Vlasov

This article describes a SQL Compiler tool (SQLC) that generates Java classes from SQL statement and table metadata. In doing so SQLC decouples Java and SQL code and enforces a clear separation of concerns between database and Java code and division of labor between data modeler and Java developer. The article also ruminates about SQLC, O/R mapping frameworks (taking Hibernate as an example) and plain JDBC applicability in different contexts. IntroductionRecently I worked on a Java application and needed to do a lot of database interaction. I didn't want to use plain JDBC for obvious reasons (that are nonetheless described below). I had already created a data model and didn't want to do double work by mirroring the data model in Java by hand. So I looked around for a carpal tunnel friendly tool, something like the erstwhile FoxPro 2.6. To my surprise I found none. No... (more)

Bytecode Generation Tips and Tricks

This article introduces readers to bytecode generation and shows how to inject generated bytecode into a JVM runtime. After reading this article generating a Java class won't be any harder than creating an XML document with the DOM API. Over last couple of years, bytecode generation has gained significant momentum. Many tools generate bytecode instead of source code to obviate the compilation step and simplify the injection of generated code at runtime. There's a number of bytecode-generation libraries with BCEL (Byte Code Generation Library) being the most renown and probably mo... (more)