clojure.clj

(ns contorted.core
  (import (org.wso2.balana Balana PDP PDPConfig ConfigurationStore)
          (org.wso2.balana.finder.impl FileBasedPolicyFinderModule)))


; For the static method everything works as expected. 
(Balana/getInstance)

; Cannot find this method?
(.getInstance Balana "" "" "" "")

woes.java

public class Balana {

  // All the constructors are private.

  public static Balana getInstance(){

        if(balana == null){
            synchronized (lock){
                if(balana == null){
                    balana = new Balana(null, null, null, null);
                }
            }
        }

        return balana;
    }
    
  public Balana getInstance(String pdpConfigName, String attributeFactoryName, String functionFactoryName,
                                                                String combiningAlgFactoryName){
        if(balana == null){
            synchronized (lock){
                if(balana == null){
                    balana = new Balana(pdpConfigName, attributeFactoryName, functionFactoryName,
                                                                        combiningAlgFactoryName);
                }
            }
        }
        return balana;
    }
}