code: public Map<Long, Integer> computeDaysForResources(List<RESOURCE> resources) {
  
          Map<Long, Integer> result = computeDays(getModificationDates(resources));
          if (LOG.isDebugEnabled()) {
              for (RESOURCE res : resources) {
                  LOG.debug(
                      "Resource "
                          + getRootPath(res)
                          + " is "
                          + result.get(new Long(getDateLastModified(res)))
                          + " days old.");
              }
          }
          return result;
      }
docs: Computes a map from modification date to number of (local) days since the modification date.<p>
  
  @param resources a list of resources
  
  @return a map from modification dates to the number of days since the modification date