Metacat

/**

 *  '$RCSfile$'

 *    Purpose: A Class that handles the SAX XML events as they

 *             are generated from XML documents

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

 *             National Center for Ecological Analysis and Synthesis

 *    Authors: Matt Jones, Jivka Bojilova

 *

 *   '$Author$'

 *     '$Date$'

 * '$Revision$'

 *

 * 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.io.File;

import java.io.FileWriter;

import java.io.StringReader;

import java.util.Stack;

import java.util.Vector;

import java.util.Hashtable;

import java.util.Enumeration;

import java.util.EmptyStackException;

import org.apache.log4j.Logger;

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 database aware Class implementing callback bethods for the SAX parser to

 * call when processing the XML stream and generating events

 */

public class AddMissedSubTreeSAXHandler extends DefaultHandler

{

   String    docId;

   Hashtable unReadableSubTreeHash;

   Vector    unReadableSubTreeList = new Vector();

   // Constant

   private static final String DESCRIBES = "describes";

   private static final String ADDITIONALMETADATA = "additionalMetadata";

   private static final String ORDER = "order";

   private static final String ID ="id";

   private static final String REFERENCES = "references";

   public  static final String INLINE = "inline";

   private Logger logMetacat = Logger.getLogger(AddMissedSubTreeSAXHandler.class);

    /** Construct an instance of the handler class

    * In this constructor, user can specify the version need to upadate

    *

    * @param myDocid  the docid for these subtree

    * @param myUnReadableTree  the tree couldn't be read

    */

   public AddMissedSubTreeSAXHandler(Hashtable myUnReadableTree) 

                                                           throws SAXException

   {

     unReadableSubTreeHash = myUnReadableTree;

     getUnReadableSubTreeList();

   }

   /* Get the unreadable tree list (every tree has the noderecorder stack)*/

   private void getUnReadableSubTreeList() throws SAXException

   {

     Enumeration en = unReadableSubTreeHash.elements();

     try

     {

       // go though the unreadable subtree list

       while (en.hasMoreElements())

       {

         // Get  a subtree without node record list

         SubTree treeWithoutStack = (SubTree)en.nextElement();

         String subTreeId   = treeWithoutStack.getSubTreeId();

         long   startNodeId = treeWithoutStack.getStartNodeId();

         long   endNodeId   = treeWithoutStack.getEndNodeId();

         // Get a subtree has the nodelist

         SubTree tree       = new SubTree(docId, subTreeId, 

                                          startNodeId, endNodeId);

         // add this tree to the vector

         unReadableSubTreeList.add(tree);

       }//while

     }//try

     catch (Exception e)

     {

       throw new SAXException(e.getMessage());

     }

   }

   /** SAX Handler that is called at the start of each XML element */

   public void startElement(String uri, String localName,

                            String qName, Attributes atts)

               throws SAXException 

  {

  }

  /** SAX Handler that is called at the end of each XML element */

   public void endElement(String uri, String localName,

                          String qName) throws SAXException 

  {

     logMetacat.info("End ELEMENT " + qName);

   }

}