Subj : Re: Rhino - general method in JS
To   : Yossi Bener <yossib@mercury.co.il>
From : Igor Bukanov <igor@fastmail.fm>
Date : Tue Sep 16 2003 06:52 pm

Yossi Bener wrote:
> I managed to run the method and the last thing (hopefully) I need is to use
> a member in the JS
> That the method doesn't know about:
> 
> ......
> parametersHash = java.util.HashMap();
> parametersHash.put("host","hover")
> parametersHash.put("port","8888")
> root = Packages.com.mercury.topaz.fm.execution.DataCollectorsAPI
> SS = root.getSiteScopeInstance();
> host = GetMapParam("host","hover","Enter Host Name")
> ......
> 
> Can I use parametersHash inside the GetMapParam() ???

You can make GetMapParam non-static but for that to work to extend the 
class where you defined GetMapParam from ScriptableObject and use its 
instance as a scope. When Rhino calls the method, it will try to convert 
JS this to Java this. Since for global functions JS this == scope you 
need to have scope that can be cast to you class.

The modifid example will be then:

ClassThatDefinesFunctions scope = new ClassThatDefinesFunctions();

Context.initStandardObjects(scope, false);

// Export the following function to JS
String[] names = { "print", "anotherFunction", "GetMapParam" };
try {
   scope.defineFunctionProperties(names, ClassThatDefinesFunctions.class,
                                  ScriptableObject.DONTENUM);
} catch (PropertyException e) {
   throw RuntimeException("Unexpected");
}

....

class ClassThatDefinesFunctions extends ScriptableObject
{
   Hashtable hash;
   public String getClassName()
   {
     return "global";
   }
....
   public Object GetMapParam(String paramName)
   {
     return hash.get(paramName);
   }
}

Regards, Igor

.