src/java.xml/share/classes/com/sun/org/apache/xerces/internal/dom/DOMImplementationImpl.java

*** 81,90 ****
--- 81,93 ----
       *
       * @return    true iff this implementation is compatable with the
       * specified feature and version.
       */
      public boolean hasFeature(String feature, String version) {
+         if (feature == null || feature.length() == 0) {
+             return false;
+         }
  
          boolean result = super.hasFeature(feature, version);
          if (!result) {
              boolean anyVersion = version == null || version.length() == 0;
              if (feature.startsWith("+")) {