Java Software Reflection: Real World Example - Building an Object Relational Model Library

Published: 08 November 2020
on channel: Coding Coach

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Software Reflection is the ability of a process to examine, introspect, and modify its own structure and behavior. This video is part of a 3 part series where we will see how reflection works by applying it to a real world problem: Creating an object relational mapping library. In order for such a library to work with any code base utilizing it, the library must be able to examine the classes, interfaces, fields and methods at runtime without knowing the names of the interfaces, fields, methods at compile time.

Assembly is inherently reflective instructions are data (stored program concept) and can be referenced just by changing the instruction pointer / program counter. High level languages lost this ability to self examine at runtime. Static languages in particular required all such knowledge be available at compile time.

Part 2 of this series can be found here:    • Java Software Reflection Hands On [Part 3]...
Part 3 can be found here:    • Java Software Reflection Hands On [Part 3]...

The code I am using in this project can be found here: https://github.com/briangormanly/4dfl...

The program uses my ORM library called 4DFLib. You can find the 4DFLib library here: https://github.com/briangormanly/4dflib

I created a video tutorial using the example above that walks you through using 4DFLib:
Part 1:    • 4DFLib Object Relational Mapping (ORM) Lib...
Part 2:    • 4DFLib Object Relational Mapping (ORM) Lib...
Part 3:    • 4DFLib Object Relational Mapping (ORM) Lib...

I also have a related short series on ORM if you are not familiar with or would like to refresh on the concepts:
Part 1:    • What is object relational mapping? ORM exp...
Part 2:    • What is object relational mapping? ORM exp...

This video is part of a full semester graduate course given on databases and application integration:    • {DBMS - Database Management Systems - series}

Additional Reading / References:
Date, Christopher John, Hugh Darwen, and Nikos Lorentzos. Time and relational theory: temporal databases in the relational model and SQL. Morgan Kaufmann, 2014.

Snodgrass, Richard T. Developing time-oriented database applications in SQL. Morgan Kaufmann Publishers, 2000.

Please like this video and subscribe to my channel to receive updates on this project:    / @codingcoach

Link to slides used in this presentation: https://drive.google.com/file/d/1WzPE...

Book used in this course: Garcia-Molina, Hector. Database systems: the complete book. Pearson Education India, 2008.
https://www.amazon.com/Database-Syste...

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