As the name suggests, Hibernate Object-Relational Mapping or ORM is an object-relational mapping library that is used in Java. The library provides a framework that helps in mapping object-oriented models of domains. The main objective of Hibernate is to solve the object-oriented impedance issues through the process of replacing the direct persistence-related accesses of database with functions that are involved in high-end object handling.
The primary feature that Hibernate comes up with is a unique mapping ability from various classes that are used in Java to the database tables and the same from Java data types to the SQL data types. The library also provides a string of retrieval facilities as well as a high end data query that facilitates handling the backend features. It also generates SQL calls, while making the lives of the developers easier, by automating set handling as well as object conversion. Besides, applications that use Hibernate also support SQL database with hardly any performance overhead.
Main Features that the developers should know
Hibernate is an ideal solution, especially when it comes to object oriented mapping as well as designing a persistence management solution or layer. It particularly comes in handy, when there is a number of business logic or functions into play, and it is imperative to save the core data in the database. When Java is used, all the pertinent business logic work normally with the objects that contain various class types. However, one should keep in mind that the database tables are not objects at all.
Hibernate also comes up with credible as well as cost effective solutions that help in mapping the database and the classes. It is designed to copy the data that appear in the database to a particular class. Besides, it also supports saving objects to databases and in the process transforms the object to one or multiple tables.
At this juncture, it needs to be mentioned that saving the data to a particular storage is called persistence, while copying the tables to the objects or the objects to the tables is known as object relational mapping.
The efficacy of ORM
The most important reason why Object Relational Mapping or ORM is used is that it results in designing better system architecture. When all the functionalities of an application are included, and dialog also includes access to the database that leads to certain disadvantages. Firstly, reusing the codes gets more difficult and secondly, and most importantly, the codes start getting repeated at a number of places without the knowledge of the developers. In case any change is made, it subsequently becomes extremely difficult to pinpoint the changes and the places where they have been made. It is ORM that helps in troubleshooting these issues and making things much easier.
Again, when the logics are separated from the dialogs and persistence, applying changes to a particular part, without affecting the other parts become much easier.
Moreover, developers also need to know that Hibernate reduces the time that is generally needed by the standard database actions to come into effect. A vast majority of queries in database development involves the customary “insert, update,” or “delete” statements, which are to say the least, simple, yet laborious. Still, with the help of Hibernate, the need to develop all these laborious and time consuming statements becomes redundant. From that point of view, Hibernate indulges in a lot of time saving.
Some Advanced Features
It is also imperative that the developers keep in mind that certain advanced features of Hibernate, in spite of being difficult, can be extremely handy, when it comes to programming. There are some advanced features like caching solutions and transactions along with other high end features that are really helpful. It is using Hibernate successful as well as tactically, that matters the most. However, using Hibernate along with its features in the cleverest as well as a strategic way is what makes the real difference.
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