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

Summary

public final class  ClassInstantiationKey
     extends java.lang.Object
{
          // Fields 1
     private final Class c1;

          // Constructors 1
     ClassInstantiationKey(Class);

          // Methods 1
     public void checkEquals(Class) throws SecurityException;
}

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

Fields

· c1	Summary  |  Top

   private final Class c1

Constructors

· ClassInstantiationKey

Summary  |  Top

   ClassInstantiationKey(Class c1) 

   public void checkEquals(Class c2)  throws SecurityException

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