org.vosao.business.impl.imex.PageDependencyExporterImpl.java Source code

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Here is the source code for org.vosao.business.impl.imex.PageDependencyExporterImpl.java

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/**
 * Vosao CMS. Simple CMS for Google App Engine.
 * 
 * Copyright (C) 2009-2010 Vosao development team.
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * email: vosao.dev@gmail.com
 */

package org.vosao.business.impl.imex;

import java.util.Iterator;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.vosao.business.imex.PageDependencyExporter;
import org.vosao.dao.DaoTaskException;
import org.vosao.entity.PageDependencyEntity;

/**
 * @author Alexander Oleynik
 */
public class PageDependencyExporterImpl extends AbstractExporter implements PageDependencyExporter {

    public PageDependencyExporterImpl(ExporterFactoryImpl factory) {
        super(factory);
    }

    @Override
    public String createXML() {
        Document doc = DocumentHelper.createDocument();
        Element root = doc.addElement("dependencies");
        List<PageDependencyEntity> list = getDao().getPageDependencyDao().select();
        for (PageDependencyEntity entity : list) {
            Element itemElement = root.addElement("item");
            itemElement.addElement("page").setText(entity.getPage());
            itemElement.addElement("dependency").setText(entity.getDependency());
        }
        return doc.asXML();
    }

    public void read(Element rootElement) throws DaoTaskException {
        for (Iterator<Element> i = rootElement.elementIterator(); i.hasNext();) {
            Element element = i.next();
            if (element.getName().equals("item")) {
                String page = element.elementText("page");
                String dependency = element.elementText("dependency");
                PageDependencyEntity entity = getDao().getPageDependencyDao().getByPageAndDependency(page,
                        dependency);

                if (entity == null) {
                    entity = new PageDependencyEntity(dependency, page);
                }
                getDaoTaskAdapter().pageDependencySave(entity);
            }
        }
    }

    /**
     * Read and import data from _messages.xml file.
     * @param xml - _messages.xml file content.
     * @throws DocumentException
     * @throws DaoTaskException
     */
    public void readFile(String xml) throws DocumentException, DaoTaskException {
        Document doc = DocumentHelper.parseText(xml);
        read(doc.getRootElement());
    }
}