@Override
 public boolean exists(String name, final ProviderProperties providerProperties)
     throws IOException {
   return HdfsAdHocDataProvider.exists(getConf(), name, providerProperties);
 }
 @Override
 public void delete(String name, final ProviderProperties providerProperties) throws IOException {
   HdfsAdHocDataProvider.delete(getConf(), name, null);
 }
 @Override
 public boolean canWrite(final String name, final ProviderProperties providerProperties)
     throws IOException {
   return HdfsAdHocDataProvider.canWrite(name, getConf(), providerProperties);
 }