protected void definePackage(
     final File container, final String packageName, final Manifest manifest) {
   final String sectionName = packageName.replace('.', '/') + "/";
   String specificationTitle = null;
   String specificationVendor = null;
   String specificationVersion = null;
   String implementationTitle = null;
   String implementationVendor = null;
   String implementationVersion = null;
   String sealedString = null;
   URL sealBase = null;
   final Attributes sectionAttributes = manifest.getAttributes(sectionName);
   if (sectionAttributes != null) {
     specificationTitle = sectionAttributes.getValue(Attributes.Name.SPECIFICATION_TITLE);
     specificationVendor = sectionAttributes.getValue(Attributes.Name.SPECIFICATION_VENDOR);
     specificationVersion = sectionAttributes.getValue(Attributes.Name.SPECIFICATION_VERSION);
     implementationTitle = sectionAttributes.getValue(Attributes.Name.IMPLEMENTATION_TITLE);
     implementationVendor = sectionAttributes.getValue(Attributes.Name.IMPLEMENTATION_VENDOR);
     implementationVersion = sectionAttributes.getValue(Attributes.Name.IMPLEMENTATION_VERSION);
     sealedString = sectionAttributes.getValue(Attributes.Name.SEALED);
   }
   final Attributes mainAttributes = manifest.getMainAttributes();
   if (mainAttributes != null) {
     if (specificationTitle == null) {
       specificationTitle = mainAttributes.getValue(Attributes.Name.SPECIFICATION_TITLE);
     }
     if (specificationVendor == null) {
       specificationVendor = mainAttributes.getValue(Attributes.Name.SPECIFICATION_VENDOR);
     }
     if (specificationVersion == null) {
       specificationVersion = mainAttributes.getValue(Attributes.Name.SPECIFICATION_VERSION);
     }
     if (implementationTitle == null) {
       implementationTitle = mainAttributes.getValue(Attributes.Name.IMPLEMENTATION_TITLE);
     }
     if (implementationVendor == null) {
       implementationVendor = mainAttributes.getValue(Attributes.Name.IMPLEMENTATION_VENDOR);
     }
     if (implementationVersion == null) {
       implementationVersion = mainAttributes.getValue(Attributes.Name.IMPLEMENTATION_VERSION);
     }
     if (sealedString == null) {
       sealedString = mainAttributes.getValue(Attributes.Name.SEALED);
     }
   }
   if (sealedString != null && sealedString.equalsIgnoreCase("true")) {
     try {
       sealBase = new URL(FileUtils.getFileUtils().toURI(container.getAbsolutePath()));
     } catch (MalformedURLException ex) {
     }
   }
   this.definePackage(
       packageName,
       specificationTitle,
       specificationVersion,
       specificationVendor,
       implementationTitle,
       implementationVersion,
       implementationVendor,
       sealBase);
 }