====== Instantiation ======

{{page>01_user_documentation:06_graph:04_visitor:02_instantiation#instantiation&noheader}}

Modules implicitly declare the [[https://javadoc.grogra.de/graph/de/grogra/graph/Instantiator.html|instantiator]] and [[https://javadoc.grogra.de/rgg/de/grogra/rgg/model/Instantiation.html|instantiation]] producer required to create an [[:01_user_documentation:06_graph:04_visitor:02_instantiation|instantiation]] by using the syntax:

<code java>
 module A 
   ==> PRODUCTION ; // instantiation declaration
</code>

======  ======

<code java>
import de.grogra.rgg.model.Instantiation;

module A ==> Box; 

// is equivalent to :
class A extends Node implements de.grogra.xl.modules.Instantiator {

        // ... constructor & pattern 	

        // instantiation
	public de.grogra.graph.Instantiator getInstantiator(){
		return Instantiation.INSTANTIATOR;
	}
	public void instantiate (Object p) {
		Instantiation producer = (Instantiation) p;
		producer.producer$begin();
		producer.instantiate(new Box());
		producer.producer$end();
	}

}

</code>