Metacat

  /** 

   * Get docid from online/url string

   */

  public static String getDocIdWithRevFromOnlineURL(String url)

  {

    String docid = null;

    String DOCID = "docid";

    boolean find = false;

    char limited = '&';

    int  count = 0; //keep track how many & was found

    Vector list = new Vector();// keep index number for &

    if (url == null)

    {

      MetaCatUtil.debugMessage("url is null and null will be returned", 30);

      return docid;

    }

    // the first element in list is 0

    list.add(new Integer(0));

    for (int i=0; i< url.length(); i++)

    {

      if (url.charAt(i) == limited)

      {

        // count plus 1

        count++;

        list.add(new Integer(i));

        // get substring beween two &

        String str = url.substring(((Integer)list.elementAt(count-1)).intValue(), i);

        MetaCatUtil.debugMessage("substring between two & is: " + str, 30);

        //if the subString contains docid, we got it

        if (str.indexOf(DOCID) != -1)

        { 

          //get index of '="

          int start = getIndexForGivenChar(str, '=')+1;

          int end   = str.length();

          docid = str.substring(start, end);

          find = true;

        }//if

      }//if

    }//for

    //if not find, we need check the subtring between the index of last & and 

    // the end of string

    if (!find)

    {

      MetaCatUtil.debugMessage("Checking the last substring", 35);

      String str = url.substring(((Integer)list.elementAt(count)).intValue() +1, 

                                 url.length());

      MetaCatUtil.debugMessage("Last substring is: " + str, 30);

      if (str.indexOf(DOCID) != -1)

      { 

          //get index of '="

          int start = getIndexForGivenChar(str, '=')+1;

          int end   = str.length();

          docid = str.substring(start, end);

          find = true;

      }//if

    }//if

    MetaCatUtil.debugMessage("The docid from online url is:"+ docid, 30);

    return docid.trim();

  }

  private static int getIndexForGivenChar(String str, char character)

  {

    int index = -1;

    // make sure str is not null

    if(str == null)

    {

      MetaCatUtil.debugMessage("The given str is null and -1 will be returned",

                                30);

      return index;

    }

    // got though the string

    for (int i=0; i<str.length(); i++)

    {

      // find the first one then break the loop

      if (str.charAt(i) == character)

      {

        index = i;

        break;

      }//if

    }//for

    MetaCatUtil.debugMessage("the index for char "+ character +

                             " is: "+index, 30);

    return index;

  }

    if (str == null)

    {

      MetaCatUtil.debugMessage("The given str is null and null will be returned"

                                +" in getDocIdfromString", 30);

      return docId;

    } //make sure docid is not null