package org.exist.backup;

import org.exist.xquery.value.DateTimeValue;
import org.exist.xquery.XPathException;
import org.exist.util.XMLReaderPool;
import org.xml.sax.ContentHandler;
import org.xml.sax.XMLReader;
import org.xml.sax.SAXException;

import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.ParserConfigurationException;
import java.util.Date;
import java.util.Properties;
import java.io.IOException;/*
 *  eXist Open Source Native XML Database
 *  Copyright (C) 2001-07 The eXist Project
 *  http://exist-db.org
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * \$Id\$
 */

public abstract class AbstractBackupDescriptor implements BackupDescriptor {

    protected Date date;

    public Date getDate() {
        if (date == null) {
            try {
                Properties properties = getProperties();
                String dateStr = properties.getProperty("date");
                if (dateStr != null) {
                    DateTimeValue dtv = new DateTimeValue(dateStr);
                    date = dtv.getDate();
                }
            } catch (IOException e) {
            } catch (XPathException e) {
            }
            if (date == null)
                // catch unexpected issues by setting the backup time as early as possible
                date = new Date(0);
        }
        return date;
    }

    public boolean before(long timestamp) {
        return timestamp > getDate().getTime();
    }

    public void parse(ContentHandler handler) throws IOException, SAXException, ParserConfigurationException {
        SAXParserFactory saxFactory = SAXParserFactory.newInstance();
        saxFactory.setNamespaceAware(true);
        saxFactory.setValidating(false);
        SAXParser sax = saxFactory.newSAXParser();
        XMLReader reader = sax.getXMLReader();
        reader.setContentHandler(handler);
        reader.parse(getInputSource());
    }
}