Essay: Compare approaches to object persistence between SQLJ and JPA

You need to write an essay of at least 800 words comparing two approaches to object persistence in Java: SQLJ vs JPA. As a basis for your essay you will get a class diagram containing 5 tables and a simple use case which describes an operation on that database. The operation is easy to understand and contains two pre and two post conditions. Your essay must cover those key points: - describe for SQLJ and JPA how the operation can be implemented - compare and contrast the two approaches This is a list of keywords and concepts which you might want to include. Those are NOT must-have keywords but they might help you to develop your ideas: - orthogonal persistence (mechanism of persistence is hidden from programmers) - transitivity - Typing, i.e. the difficulty to align types between programming language and DB - interpretation of NULL types - dynamic queries - embedded queries - correctness - consistency - impedance mismatch This work must be 100% your own content. You may very well reference other articles or papers, but references must be given. IMPORTANT: While I will provide one article about JPA and one about SQLJ to you, you must have practical experience with RDBMS, Java, SQLJ and JPA! You must know what you are talking about and your points must be solid and well-thought of.