code: private void unpackJars( File directory )
              throws MojoExecutionException
      {
          getLog().info( "-- Unpack jars before sign operation " );
  
          verboseLog(
                  "see http://docs.oracle.com/javase/7/docs/technotes/guides/deployment/deployment-guide/pack200.html" );
  
          // pack
          pack200Jars( directory, unprocessedJarFileFilter );
  
          // then unpack
          try
          {
              getPack200Tool().unpackJars( directory, unprocessedPack200FileFilter );
          }
          catch ( IOException e )
          {
              throw new MojoExecutionException( "Could not unpack200 jars: ", e );
          }
      }
docs: ----------------------------------------------------------------------