Support stream generation with JavaObjectTransformer

[gatear]

In order to make JavaObjectTransformer generate a stream of values through method

    public Stream<Object> generateStream(final Schema<Object, ?> schema, long limit)

I had to inject a clazz variable sourceClazz.
sourceClazz acts as the input Class for apply.

[what-the-diff]

PR Summary

• Introduction of Optional Types
  The use of the Optional type has been introduced in the JavaObjectTransformer class. This is important as the Optional type helps us avoid NullPointerExceptions making our code safer and more robust by telling us where we could expect to see nulls.

• Creation of a New Field
  A new field sourceClazz was created. It helps to hold an object that we may or may not possess and its usage will make it easier for other developers to understand what the field is doing within our codebase.

• Introduction of New method
  A new method from(Class input) was added which allows developers to easily convert input data into the type we want. This makes the usage of the JavaObjectTransformer class easier and more diverse.

• Modification of Existing methods
  Modifications were done to the generateStream and generate methods in JavaObjectTransformer class. The usage of the generateStream method now returns a stream of data which can be processed easily and efficiently. Furthermore, using sourceClazz in these methods gives us added flexibility in deciding which class we're working with, hence improving functionality.

• Addition and Expansion of Tests
  Two new test cases were added to JavaObjectTransformerTest.java. These ensure the smooth running of our code, able to properly check the correct functioning of our generateStream method in both scenarios where the source class is populated and when it's empty. The inclusion of these tests will maintain the stability and reliability of our application.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.89%. Comparing base (9cfcfdf) to head (72360fc).

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1313      +/-   ##
============================================
+ Coverage     91.82%   91.89%   +0.07%     
- Complexity     3096     3102       +6     
============================================
  Files           311      311              
  Lines          6090     6098       +8     
  Branches        631      631              
============================================
+ Hits           5592     5604      +12     
+ Misses          342      339       -3     
+ Partials        156      155       -1     

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[bodiam]

Hi @gatear , what's the state of this PR? It looks good to me, do you want it merged?

[gatear]

@bodiam yes, it's ready to merge 👍