Parse json into multiple java pojos using Jackson annotations

Jackson is a suite of data-processing tools for Java (and JVM platform), including the flagship streaming JSON parser / generator library, matching data-binding library (POJOs to and from JSON). In real world programming we will encounter complex cases of JSON to POJO conversion. Here, is one such case where we want to parse a single JSON into multiple java POJOs.

Overriding equals and hashcode for a POJO

This is an interesting case of programming where you need to compare two POJO objects. You might need to compare standalone objects or you may need to uniquely identify them in a collection. This can be achieved by overriding equals() and hashCode() methods.