Subj : Re: [Rhino] can you add default getters/setters?
To   : mcbp223
From : Igor Bukanov
Date : Fri May 07 2004 10:13 am

Mike C. wrote:
> This would better go into the wishlist newsgroup ;)
> 
> In ASP i can write 
>     Session("key") = "val";
> 
> And it expands to 
>     Session.Value("key", "val");
> where Value is of type propput (or propputref), in IDL slang.
> There is also a getter for Value, so you can write
>     str = Session("key") which expands to Session.Value("key").
> 
> Would that be doable in Rhino, so I can supply a getter like
>     Object Session.jsGetDefault_Value(String key)
> and 
>     jsSetDefault_Value(String key, Object val) 
> to be used by the runtime?

It is not possible in Rhino without parser modifications to support
     Session("key") = "val";
since in JS lvalue can only be either variable name or property 
reference. But if you can accept replacing ("key") with ["key"], then 
the only thing you have to do is to override in your ScriptableObject 
subclass has/get/put methods, something among the lines:

Hashtable customMap;

public boolean has(String name, Scriptable start)
{
	return super.has(name) || customMap.has(name);
}

public Object get(String name, Scriptable start)
{
	Object x = super.get();
	if (x == NOT_FOUND) {
		x = customMap.get(name);
		if (x == null) {
			x = NOT_FOUND;
		}
	}
	return x;
}

public void put(String name, Scriptable start, Object value)
{
	if (super.has(name, start)) {
		super.put(name, start, value);
	} else if (start != this) {
		start.put(name, start, value);
	} else {
		customMap.put(name);
	}
}

And if you really needs that, you still can support Session("key") 
instead of Session["key"] to read the properties, but then you need to 
implement Function interface in your class as well.

Regards, Igor

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