Is there a better way to handle Decision Table (XSL files) with Drools version 4.0.7?

In Drools 2.1, I can do the following;

file = new File(dir, XSL_filename);

 InputStream stream = null;

 RuleBase ruleBase = null;

 WorkingMemory wm = null;

try {

                stream = new FileInputStream(file);

} catch{...

}

try{

                ruleBase = DecisionTableLoader.loadFromInputStream(stream);

                WorkingMemory wm = ruleBase.newWorkingMemory();

} catch{ ...

}

In Drool 4.0.7, I tried the following  

file = new File(dir, XSL_filename);

 InputStream stream = null;

 RuleBase ruleBase = null;

try {

                stream = new FileInputStream(file);

} catch{...

}

try{

                ruleBase = RuleBaseFactory.newRuleBase();

                PackageBuilder builder = new PackageBuilder();

                SpreadsheetCompiler sCompiler = new SpreadsheetCompiler();

                String drl = sCompiler.compile(stream, InputType.XLS);

                builder.addPackageFromDrl(new StringReader(drl));

                ruleBase.addPackage(builder.getPackage());

                WorkingMemory wm = ruleBase.newStatefulSession();

} catch{ ...

}

Thanks,

Hong