code: protected Map<String,String> initializeAdditionalParameters()
      {
          //get configuration
          Map<String,String> configuration=this.getConfiguration();
  
          //get property part
          String propertyPart=this.getPropertyPart();
          
          //get prefix
          String prefix=FaxJob2HTTPRequestConverterConfigurationConstants.ADDITIONAL_PARAMETER_PROPERTY_KEY_PREFIX.toString();
          prefix=MessageFormat.format(prefix,propertyPart);
  
          //init output
          Map<String,String> additionalParametersMap=new HashMap<String,String>();
          
          Iterator<Entry<String,String>> iterator=configuration.entrySet().iterator();
          Entry<String,String> entry=null;
          String key=null;
          String value=null;
          while(iterator.hasNext())
          {
              //get next entry
              entry=iterator.next();
              
              //get next key
              key=entry.getKey();
              
              if(key!=null)
              {
                  //format key
                  key=MessageFormat.format(key,propertyPart);
                  key=key.trim();
                  
                  if(key.length()>0)
                  {
                      //check if additional parameter key
                      if(key.startsWith(prefix))
                      {
                          //get value
                          value=entry.getValue();
                          
                          if(value!=null)
                          {
                              value=value.trim();
                              if(value.length()>0)
                              {
                                  //get updated key without prefix
                                  key=key.substring(prefix.length());
                                  
                                  //put in map
                                  additionalParametersMap.put(key,value);
                              }
                          }
                      }
                  }
              }
          }
          
          return additionalParametersMap;
      }
docs: This function builds and returns the additional parameters map.
  
  @return  The additional parameters