edu.utah.janos.nodeos
Class ClassInstantiationKey

java.lang.Object
  |
  +--edu.utah.janos.nodeos.ClassInstantiationKey

public final class ClassInstantiationKey

extends java.lang.Object

Blaouaufngg. Janos uses reflection to instantiate the first object in a flow, so that the object can't have pointers to objects in other flows. Unfortunately, the object's class usually belongs to another package, so it must be public and have a public constructor in order for JDK1.1-style reflection to work. But this means anyone can instantiate the class, which may not be desirable. To prevent this, Janos passes a ClassInstantiationKey into the constructor (if there is a constructor taking one ClassInstantiationKey as an argument), and the constructor verifies that the key matches its own class: public class Foo { public Foo(ClassInstantiationKey key) throws SecurityException { key.checkEquals(Foo.class); } }

Author:

Janos Ministry of Development

Method Summary

void	checkEquals(java.lang.Class c2)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

checkEquals

public void checkEquals(java.lang.Class c2)
                 throws java.lang.SecurityException