Metacat

/**

 *  '$RCSfile$'

 *    Purpose: A class that handles xml messages passed by the 

 *             replication handler

 *  Copyright: 2000 Regents of the University of California and the

 *             National Center for Ecological Analysis and Synthesis

 *    Authors: Chad Berkley

 *    Release: @release@

 *

 *   '$Author: tao $'

 *     '$Date: 2003-04-18 20:29:06 -0700 (Fri, 18 Apr 2003) $'

 * '$Revision: 1581 $'

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

package edu.ucsb.nceas.metacat;

import java.sql.*;

import java.util.Stack;

import java.util.Vector;

import java.util.Enumeration;

import java.util.EmptyStackException;

import org.xml.sax.Attributes;

import org.xml.sax.SAXException;

import org.xml.sax.SAXParseException;

import org.xml.sax.ext.DeclHandler;

import org.xml.sax.ext.LexicalHandler;

import org.xml.sax.helpers.DefaultHandler;

/** 

 * A Class implementing callback bethods for the SAX parser to

 * call when processing the XML messages from the replication handler

 */

public class CatalogMessageHandler extends DefaultHandler 

{

  private Vector updates = new Vector();

  private Vector indivUpdate = new Vector();

  String currentTag = new String();

  StringBuffer textBuffer = new StringBuffer();

  /**

   * This method starts a new vector for each updatedDocument tag.

   */

  public void startElement(String uri, String localName, String qName, 

                           Attributes attributes) throws SAXException

  {

    currentTag = localName;

    if(localName.equals("row"))

    {

      indivUpdate = new Vector();

    }

    textBuffer = new StringBuffer();

  }

  /**

   * This method write the indivUpdate to updates when it finds the end of

   */

  public void endElement(String uri, String localName, String qName) 

              throws SAXException

  {

    if(currentTag.equals("entry_type") || currentTag.equals("source_doctype")

       || currentTag.equals("target_doctype") || currentTag.equals("public_id")

       || currentTag.equals("system_id"))

    {

      indivUpdate.add((textBuffer.toString()).trim());

    }

    if(localName.equals("row"))

    {

      updates.add(new Vector(indivUpdate));

    }

  }

  /**

   * Take the data out of the docid and date_updated fields

   */

  public void characters(char[] ch, int start, int length) throws SAXException

  {

    textBuffer.append(new String(ch, start,length));

  }

  public Vector getCatalogVect()

  {

    return updates;

  }

}