code: public static boolean iterateOnChildDirs(File parentDir,FileIterator iterator) {		
  		if (parentDir==null){
  			log.warn("Parent dir is null");
  			return true;
  		} 
  		
  		// verify that we can read dir.
  		String message=verifyReadDir(parentDir);
  		if (message !=null){
  			log.warn(message);
  			return true;
  		}
  
  		File childs[]=parentDir.listFiles(DIR_FILTER);
  		
  		if (childs==null){
  			log.info("Parent dir:"+parentDir.getAbsolutePath()+" do not have child dirs");
  			return true;
  		} else {
  			for (File child:childs){
  				
  				boolean iteratorRet=iterator.iterate(child);
  
  				if (iteratorRet==false){
  					if (log.isDebugEnabled()){
  						log.debug("Iterator returns false. Iteration on:"+parentDir.getAbsolutePath()+" stopped.");
  					}
  					return false;
  				}
  			}
  
  			return true;
  		}		
  	}
docs: Iterate only on the childs of the parent folder
  Iterates on the folder pased on parameter only if the content can be readed.
  Return false if the iterator returns false on a file.
  
  @param parentDir the parent folder where the chils to iterate on are.
  @return