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Introduction In modern Java serialization and deserialization of simple objects to and from JSON is simple, quick and eficient. There are several libraries that do the job well, in particular Jackson and GSON are very broadly used. In our project …

Dynamic JSON deserialization of complex polymorphic data models Read More »


Many tutorials can guide an image recognition newbie to training a Haar cascade classifier, particularly the OpenCV official tutorial, Harrison’s Haar Cascade Object Detection Face & Eye OpenCV Python Tutorial, and Creating your own Haar Cascade OpenCV Python Tutorial. Once …

Haar Cascade and false positives – choose your training data well Read More »


Introduction The novel coronavirus, named SARS-CoV-2, has been spreading throughout the world for several months now. It emerged in China, most likely in December 2019. After just 4 months it is now (April 2020) infecting people in most countries in …

Coronavirus simulation – how do we slow the virus down? Read More »


This article contains technical information, problems I encountered during the creation of my personal Google Assistant and their solutions. Despite the vast amount of documentation freely available from Google, there isn’t a clear path on how to connect your bot …

Integration of Google Assistant with Oracle APEX and Oracle DB. Part 2 Read More »

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Nowadays, chatbots are becoming more and more popular, and allow for more significant interaction with users. But is it possible to combine Google Assistant with an Oracle database, and integrate it with APEX?  Imagine that you are a sales representative, …

Integration of Google Assistant with Oracle APEX and Oracle DB. Part 1 Read More »

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When we are working on projects for our clients, we often face the problem of database schema migration. In the previous article, I answered the basic questions about the migration problem. I presented capabilities of the Gradle and Flyway tools …

Gradle, Flyway & Oracle APEX – a few words about migration. Part 2 Read More »

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When we are working on projects for our clients, we often face the problem of database schema migration. This is not a simple task. Each time we have to answer the same questions: In which script are the changes implemented …

Gradle, Flyway & Oracle APEX – a few words about migration. Part 1 Read More »

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ETL processes are key parts of Business Intelligence systems. Their creation involves many challenges that organizations must face if they want to base decision-making processes on real-time data analysis. And here, tools such as Pentaho Data Integration can help. In …

Oracle APEX – Let’s integrate with Pentaho! Part 2 Read More »

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ETL processes are key parts of Business Intelligence systems. Their creation involves many challenges that organizations must face if they want to base decision-making processes on real-time data analysis. And here, tools such as Pentaho Data Integration can help. It …

Oracle APEX – Let’s integrate with Pentaho! Part 1 Read More »

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Jira is Atlassian’s software for error tracking and project management.  Users working with any APEX application often need to report an error regarding the application usage or data they work with. Instead of logging in to Jira, looking for a …

Oracle APEX – Let’s integrate with JIRA! Part 3 Read More »

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