code: @Override
      public String evaluate(String request) throws PEPException {
          if (logger.isDebugEnabled()) {
              logger.debug("evaluating String request");
          }
  
          String[] requests = new String[] {request};
          return evaluate(requests);
      }
docs: /*
  (non-Javadoc)
  @see org.fcrepo.server.security.xacml.pep.EvaluationEngine#evaluate(java.lang.String)