Auslesen eines Systemparameters

package org.nuclet.businessentity; 

import org.nuclet.printout.FormularAbschlussAuftragPO;
import org.nuclos.api.common.NuclosFile;
import org.nuclos.api.mail.NuclosMail;
import org.nuclos.api.provider.PrintoutProvider;
import org.nuclos.api.provider.MailProvider;

public class AbschlussAuftragRegel implements InsertFinalRule {

   public void insertFinal(InsertContext context) throws BusinessException { 
        
		Auftrag a = context.getBusinessObject(Auftrag.class);
      	
		NuclosFile result = PrintoutProvider.run(FormularAbschlussAuftragPO.Deutsch_PDF, a.getId());
        
		NuclosMail newMail = new NuclosMail();
        
		newMail.setSubject("Abschluss eines Auftrags");
        newMail.setFrom("automatic@meineFirma.de");
        newMail.addRecipient("Max.Mustermann@meinKunde.de");
        newMail.setMessage("Der Auftrag wurde erfolgreich abgeschlossen.");
        newMail.addAttachment(result);
      
        MailProvider.send(newMail);
    }
}

package org.nuclet.businessentity; 

import org.nuclos.api.annotation.Rule;
import org.nuclos.api.context.UpdateContext;
import org.nuclos.api.exception.BusinessException;
import org.nuclos.api.provider.ParameterProvider;
import org.nuclos.api.rule.UpdateRule;
import org.nuclos.parameter.NuclosSystemParameter;

/** @name        
  * @description 
  * @usage       
  * @change      
*/
@Rule(name="SendConfirmationEmail", description="SendConfirmationEmail")
public class SendConfirmationEmail implements UpdateRule {
    public void update(UpdateContext context) throws BusinessException {
    
	   Auftrag a = context.getBusinessObject(Auftrag.class);

	   if(a.isApproved()) {
 			String useEmail = ParameterProvider.getSystemParameter(NuclosSystemParameter.ConfirmationEmailIsActive);
	       // First check, if the value of if this parameter is not null
    	   if (useEmail != null) {
				if (usrEmail.equals("Y")) {
					// Following method creates a NuclosEmail and sends it to the user mentioned in "Auftrag" a.
					// For lack of space this method is not implemented in this example. Suppose it does exist.
					sendConfirmationEmail(a);
				}
		   }        
	   }
    }
}