search: keywords: ['Java API', 'OClass', 'class', 'super class', 'addSuperClass']

OClass - addSuperClass()

This method adds a superclass to the database class.

Adding Superclasses

OrientDB supports polymorphism in database classes. This means that you can register an OClass instance to extend another OClass instance. Using this method, you can assign the given database class as the superclass to this class.

Syntax

OClass OClass().addSuperClass(OClass superClass)

Return Value

This method returns an OClass instance.

Example

Imagine you want a method to provision a database for your application. You might want to add a series of classes in sequence and then add them to the relevant superclass.

private ODatabaseDocument db;
private Logger logger;

public void provisionSubClasses(OClass superCls, List<OClass> classes){

    // Log Operation
	logger.info(String.format( 
		"Adding subclasses to %s",
		superCls.getName()));

	// Iterate over subclasses 
	for(OClass cls : classes){

		// Log Debug Message
		logger.debug(String.format(
		   "Adding subclass '%s',
		   cls.getName()));

		// Add Superclass to Class
		cls.addSuperClass(superCls);
	}
	logger.debug("Done");
}