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/**
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 *  '$RCSfile$'
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 *    Purpose: A class that handles xml messages  passed by  the replication handler
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 *  Copyright: 2000 Regents of the University of California and the
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 *             National Center for Ecological Analysis and Synthesis
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 *    Authors: Chad Berkley
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 *    Release: @release@
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 *
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 *   '$Author$'
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 *     '$Date$'
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 * '$Revision$'
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 */
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package edu.ucsb.nceas.metacat;
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import java.sql.*;
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import java.util.Stack;
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import java.util.Vector;
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import java.util.Enumeration;
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import java.util.EmptyStackException;
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import org.xml.sax.Attributes;
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import org.xml.sax.SAXException;
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import org.xml.sax.SAXParseException;
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import org.xml.sax.ext.DeclHandler;
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import org.xml.sax.ext.LexicalHandler;
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import org.xml.sax.helpers.DefaultHandler;
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/**
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 * A Class implementing callback bethods for the SAX parser to
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 * call when processing the XML messages from the replication handler
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 */
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public class CatalogMessageHandler extends DefaultHandler
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{
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  private Vector updates = new Vector();
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  private Vector indivUpdate = new Vector();
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  String currentTag = new String();
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  /**
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   * This method starts a new vector for each updatedDocument tag.
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   */
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  public void startElement(String uri, String localName, String qName,
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                           Attributes attributes) throws SAXException
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  {
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    currentTag = localName;
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    if(localName.equals("row"))
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    {
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      indivUpdate = new Vector();
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    }
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  }
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  /**
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   * This method write the indivUpdate to updates when it finds the end of
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   */
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  public void endElement(String uri, String localName, String qName)
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              throws SAXException
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  {
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    if(localName.equals("row"))
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    {
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      updates.add(new Vector(indivUpdate));
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    }
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  }
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  /**
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   * Take the data out of the docid and date_updated fields
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   */
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  public void characters(char[] ch, int start, int length) throws SAXException
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  {
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    if(currentTag.equals("entry_type") || currentTag.equals("source_doctype")
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       || currentTag.equals("target_doctype") || currentTag.equals("public_id")
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       || currentTag.equals("system_id"))
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    {
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      //System.out.println("parser adding: " + (new String(ch, start, length)).trim());
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      indivUpdate.add((new String(ch, start, length)).trim());
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    }
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  }
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  public Vector getCatalogVect()
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  {
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    return updates;
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  }
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}