Floyd Marinescu wrote:
>
> A good idea when designing entity beans is to keeping bulk accessors of
> entity beans (ie: Value Object factory methods) separate from the entity
> bean itself.
>
> ...
> Does anyone have any ideas on how to extract value object creation
> from an entity bean?
How about the following. Add two methods to your remote interface:
public class MyEntityImpl ...
{
void setValueObject(String name, Object value)
{
String factoryName =
_context.getEJBObject().getEJBHome().getMetaData().getRemoteInterfaceClass().getName()
+ name;
Class factoryClass = getClassLoader().loadClass(factoryName, true);
ValueObjectFactory factory = (ValueObjectFactory)factoryClass.newInstance();
factory.set(this, value);
}
Object getValueObject(String name)
{
String factoryName =
_context.getEJBObject().getEJBHome().getMetaData().getRemoteInterfaceClass().getName()
+ name;
Class factoryClass = getClassLoader().loadClass(factoryName, true);
ValueObjectFactory factory = (ValueObjectFactory)factoryClass.newInstance();
return factory.get(this, name);
}
}
public interface ValueObjectFactory
{
public void set(EntityBean entity, Object value);
public Object get(EntityBean entity);
}
Now if you create a new value object called MyEntityDetails, you
could use (from a client):
MyEntityDetails details = (MyEntityDetails)entity.getValueObject("Details");
and so on.
When you implement the ValueObjectFactory class for MyEntityDetails, note that
you can access the entity instance directly instead of through remote calls.
________________________________________________________________________________
Evan Ireland Sybase EAServer Engineering [EMAIL PROTECTED]
Wellington, New Zealand +64 4 934-5856
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