The following article discusses driver class in Javascript and it uses with example codes.

What Is a Driver Class?

A driver class is an utility class used to carry out some processing tasks. In Java, it works by connecting a java application to the main database.

There are multiple examples for vendor-specific driver classes. MySQL database and Oracle database with their own driver class are just a few to name.

This means if you want to connect an application to a MySQL database, a driver class by MySQL is required. Make sure to follow this same process for other databases.

A driver class often contains the main method for executing the overall task. It also includes several static methods with procedural programming.

How To Create A Driver Class?

The best method to create a driver class is to use XOM API. To accomplish the task, the rule engine should know the class’s runtime policy. This policy comes with field setters and getters with method and constructor bodies for a class driver.

It is defined by the following interfaces:

• IlrClassDriver.ClassTester: tests a particular class.
• IlrClassDriver.Reader: shows a field getter to read a Javascript object field.
• IlrClassDriver.Writer: shows a field setter to assign a value to an object field.
• IlrClassDriver.UnknownChecker: tests the presence of any unknown fields in a class. Those fields should not be assigned any value.
• IlrClassDriver.Ivoker: shows an invoker to allow a Java object to execute a method.
• IlrClassDriver.Constructor: comes with a constructor to create a class’s instance.
• IlrClassDriver: includes various methods to return instances of any previous interface.

To create a driver class, first of all, you need to code and implement the IlrClassDriver interface. Then, use a public method with the code as follows:

public static IlrClassDriver create(IlrReflect reflect)
{
     // Do something to create and return the driver.
}

Remember to call a method with this code to implement a class driver. The signature can be used to construct a driver object with introspection.

A driver class allows you to execute a dynamic class, including the ones using hash tables. Plus, there is no need to create a field depending on the implementation. After defining the class drivers, you can create and manipulate Java objects thanks to the dynamic classes.

In this case, you don’t have to know the implementation details of this driver.

JDBC Driver Classes

A JDBC driver class needs to be identified as a parameter in a connection string and a DataSource object’s component in the JVM Managed Runtime. It is the main class for most JDBC drivers, which means it is driver-specific.

Conclusion

The post has offered a more in-depth insight into a driver class in Javascript. Check it to see what a driver class is, how to create it, and what it is used for.