code: @Override
      public byte[] read(String resourceId) {
          File f = this.cachedResources.get(resourceId);
          if (Objects.isNull(f)) {
              return null;
          }
          try {
  			return Files.readAllBytes(f.toPath());
  		} catch (IOException exception) {
  			throw new MonetaryException("An error on retrieve the resource id: " + resourceId, exception);
  		}
      }
docs: /*
  (non-Javadoc)
  
  @see
  org.javamoney.moneta.loader.format.ResourceCache#read(java.lang.String)