Object Oriented Data Language (OODL) is an imperative programming language I developed for my Bacelor's Degree Thesis. OODL is not open-source (yet?), this repo hosts only a demo.
OODL makes developing a web application for collecting data as easy as instantiating an object in any object oriented programming language.
The idea behind OODL is to think at the data collection process as a program to be implemented in some kind of language.
OODL was designed to allow developers to build dynamic web applications for data collections (also very complex ones) which execute client-side.
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OODL is an interpreted language, written in TypeScript. It can run on any browser since it was developed by using the ecma-262 standard. OODL's interpreter recevices programs in JSON format.
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OODL is a weak typed language. However developer can add type constraints by means of OODL's Contraint feature;
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OODL provides typical high level programming languages' functionalities (e.g. control flow structure, dynamic types, etc).
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Objects & Variable: they can be used by means of OODL's Model.
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Contraint: it can be used to specify constraints on model's properties. Constraints can be either about mandatoriety/optinality or data type (boolean, number, string, etc).
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Reference: you could think of it as a pointer.
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Array: OODL also supports arrays. They are 0-indexed and automatically resized (as happen in Javascript).
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Sequence
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If
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[Do]While
OODL is part of a three-tier based system.
The backend was developed by using the Java Enterprise Edition 7 stack. The JAX-RS Api has been used to implement REST Web Services while the Java Persistence Api (JPA) and the ORM Hibernate have been used for persistency.
A single page application has been provided. It was built with the Angular framework. Many UI component were taken from Angular Material.
PostgreSQL has been used as OR-DBMS.
Suppose you want to develop a web application to collect useful data about Covid-19. In particular, you want to collect, for a given person: name, surname, city, address, age and the number of times he/she went out in the previous 15 days. For each time the person went out, suppose you are interessed in collecting: date, moving's reason, distance and if the person had a certification. Moreover, you want to check whether the person has Covid-19's symptoms. If so, you want a warning message about a possible Covid-19 infection to appear.
- Ask the person to insert the above listed data.
- Check if the person has Covid-19's symptoms
2.1. If so, show a warning. - For each time the person went out:
3.1. Ask the moving details.
Person java class definition.
Moving Detail java class definition.
Creating OODL models.
Since some property are mandatory, let's specify a constraint.
Now we use OODL's Fill instruction to build the corresponding form. At this point, step 1 is completed.
Step 2 & 2.1: Let's check Covid-19's symptoms.
Eventually, let's code the point 3.
