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/**
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* '$RCSfile$'
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* Purpose: A class that handles xml messages passed by the
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* 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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*
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* '$Author$'
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* '$Date$'
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* '$Revision$'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat;
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import java.util.Vector;
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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.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 ReplMessageHandler 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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private Vector indivDelete = new Vector();
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private Vector indivRevision = new Vector();
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private Vector deletes = new Vector();
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private Vector revisions = new Vector();
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private String server;
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private String dataFile;
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private boolean update = false;
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private boolean delete = false;
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private boolean revision = false;
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String currentTag = new String();
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StringBuffer textBuffer = null;
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public ReplMessageHandler()
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{
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}
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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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textBuffer = new StringBuffer();
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currentTag = localName;
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if(localName.equals("updatedDocument"))
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{
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indivUpdate = new Vector();
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update = true;
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}
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else if(localName.equals("deletedDocument"))
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{
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indivDelete = new Vector();
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delete = true;
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}
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else if (localName.equals("revisionDocument"))
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{
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indivRevision = new Vector();
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revision = true;
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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(currentTag.equals("docid") && update)
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{
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indivUpdate.add(textBuffer.toString());
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}
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else if(currentTag.equals("docid") && delete)
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{
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indivDelete.add(textBuffer.toString());
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}
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else if (currentTag.equals("docid") && revision)
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{
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indivRevision.add(textBuffer.toString());
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}
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if(currentTag.equals("rev") && update)
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{
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indivUpdate.add(textBuffer.toString());
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indivUpdate.add(server);
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}
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else if(currentTag.equals("rev") && delete)
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{
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indivDelete.add(textBuffer.toString());
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indivDelete.add(server);
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}
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else if(currentTag.equals("rev") && revision)
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{
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indivRevision.add(textBuffer.toString());
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indivRevision.add(server);
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}
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if(currentTag.equals("date_updated") && update)
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{
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indivUpdate.add(textBuffer.toString());
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indivUpdate.add(server);
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}
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else if(currentTag.equals("date_updated") && delete)
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{
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indivDelete.add(textBuffer.toString());
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indivDelete.add(server);
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}
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else if(currentTag.equals("date_updated") && revision)
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{
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indivRevision.add(textBuffer.toString());
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indivRevision.add(server);
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}
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if(currentTag.equals("server"))
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{
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server = textBuffer.toString();
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}
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//Adding data file attribute into indivUpdate vector
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if (currentTag.equals("datafile"))
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{
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dataFile = textBuffer.toString();
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if (update)
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{
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indivUpdate.add(dataFile);
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}
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else if (revision)
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{
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indivRevision.add(dataFile);
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}
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}
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if(localName.equals("updatedDocument"))
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{
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updates.add(new Vector(indivUpdate));
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update = false;
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}
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else if(localName.equals("deletedDocument"))
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{
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deletes.add(new Vector(indivDelete));
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delete = false;
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}
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else if (localName.equals("revisionDocument"))
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{
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revisions.add(new Vector(indivRevision));
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revision = false;
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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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textBuffer.append(new String(ch, start,length));
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}
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public Vector getUpdatesVect()
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{
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return updates;
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}
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public Vector getDeletesVect()
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{
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return deletes;
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}
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public Vector getRevisionsVect()
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{
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return revisions;
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}
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/**
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* Gets the server name
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* @return
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*/
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public String getServerName()
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{
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return server;
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}
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}
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