Using Rapidminer in an Applet

Zdenek

Hi there,
I use some rapidminer operators in an applet, but when I tried to deploy, I get a plenty of security errors. For example, great problem is creating OperatorDescription, because I cant get ClassLoader.getSystemClassLoader() in an unsigned applet. Is there a way how to avoid using signed applets?

operatorDescription = new OperatorDescription(
  ClassLoader.getSystemClassLoader(), 
  "DecisionTreeLearner", 
  "com.rapidminer.operator.learner.tree.DecisionTreeLearner", 
  "description can be written here", null, null, null);

land

Hi,
did you try to avoid creating an OperatorDescription and instead create the Operator via OperatorService.createOperator(Operator.class)?

Greetings,
  Sebastian

Zdenek

Yes, I have tried:

OperatorService.createOperator(com.rapidminer.operator.learner.tree.DecisionTreeLearner.class);

but I got only:

com.rapidminer.operator.OperatorCreationException: 
      No operator description object given for 'com.rapidminer.operator.learner.tree.DecisionTreeLearner
      at com.rapidminer.tools.OperatorService.createOperator(OperatorService.java:429)
       .... 

I think the problem is don't call RapidMiner.init(); method, becase initializaton itself causes unsigned applet security exception.
So the question should be probably reformulated to: How to initialize Rapidminer in an unsigned applet?