Metacat

    /**

     * The method will return the lasted revision in metacat server 

     * for a given document id. If some error happent, this method will throw

     * a exception.   

     * @param docId String  the given docid you want to use. the docid it self

     *                      can have or haven't revision number

     * @throws MetacatException

     */

     public int getNewestDocRevision(String docId) throws MetacatException

     {

       int rev = 0;

       //set up properties

       Properties prop = new Properties();

       prop.put("action", "getrevisionanddoctype");

       prop.put("docid", docId);

       String response = null;

        try 

        {

            response = sendDataForString(prop, null, null, 0);

            String revStr = parserRevisionResponse(response);

            Integer revObj = new Integer(revStr);

            rev = revObj.intValue();

            // Check for an error condition

           if (response.indexOf("<error>") != -1) 

           {

              throw new MetacatException(response);

           }

        } 

        catch (Exception e) 

        {

            throw new MetacatException(e.getMessage());

        }

        return rev;

     }

    /*

     * "getversionanddoctype" action will return a string from metacat server.

     * The string format is "revision;doctype"(This is bad idea, we should use xml)

     * This method will get revision string from the response string

     */

    private String parserRevisionResponse(String response) throws Exception

    {

      String revision = null;

      if (response != null)

      {

        int firstSemiCol = response.indexOf(";");

        revision = response.substring(0, firstSemiCol);

      }

      return revision;

    }