/**
* 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.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang.StringUtils;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.vosao.business.decorators.TreeItemDecorator;
import org.vosao.business.imex.ExporterFactory;
import org.vosao.business.imex.TagExporter;
import org.vosao.dao.DaoTaskException;
import org.vosao.entity.TagEntity;
/**
* @author Alexander Oleynik
*/
public class TagExporterImpl extends AbstractExporter
implements TagExporter {
public TagExporterImpl(ExporterFactory factory) {
super(factory);
}
private List<TreeItemDecorator<TagEntity>> getTagTreeRoots() {
List<TagEntity> tags = getDao().getTagDao().select();
Map<Long, TreeItemDecorator<TagEntity>> buf =
new HashMap<Long, TreeItemDecorator<TagEntity>>();
for (TagEntity tag : tags) {
buf.put(tag.getId(), new TreeItemDecorator<TagEntity>(tag, null));
}
List<TreeItemDecorator<TagEntity>> roots = new ArrayList<TreeItemDecorator<TagEntity>>();
for (Long id : buf.keySet()) {
TreeItemDecorator<TagEntity> tag = buf.get(id);
if (tag.getEntity().getParent() == null) {
roots.add(tag);
} else {
TreeItemDecorator<TagEntity> parent = buf.get(tag.getEntity()
.getParent());
if (parent != null) {
parent.getChildren().add(tag);
tag.setParent(parent);
}
}
}
return roots;
}
@Override
public String createXML() {
Document doc = DocumentHelper.createDocument();
Element element = doc.addElement("tags");
List<TreeItemDecorator<TagEntity>> list = getTagTreeRoots();
for (TreeItemDecorator<TagEntity> tag : list) {
createTagXML(element, tag);
}
return doc.asXML();
}
private void createTagXML(Element element, TreeItemDecorator<TagEntity> tag) {
Element tagElement = element.addElement("tag");
tagElement.addElement("name").setText(tag.getEntity().getName());
String title = tag.getEntity().getTitle();
if (StringUtils.isEmpty(title)) {
title = tag.getEntity().getName();
}
tagElement.addElement("title").setText(title);
for (TreeItemDecorator<TagEntity> child : tag.getChildren()) {
createTagXML(tagElement, child);
}
}
public void readTags(Element tagsElement, Long parent) throws DaoTaskException {
for (Iterator<Element> i = tagsElement.elementIterator();
i.hasNext(); ) {
Element element = i.next();
if (element.getName().equals("tag")) {
String name = element.elementText("name");
String title = element.elementText("title") != null ?
element.elementText("title") : name;
TagEntity tag = getDao().getTagDao().getByName(parent, name);
if (tag == null) {
tag = new TagEntity(parent, name, title);
}
tag.setName(name);
getDaoTaskAdapter().tagSave(tag);
readTags(element, tag.getId());
}
}
}
/**
* Read and import data from _messages.xml file.
* @param xml - _messages.xml file content.
* @throws DocumentException
* @throws DaoTaskException
*/
public void read(String xml) throws DocumentException,
DaoTaskException {
Document doc = DocumentHelper.parseText(xml);
readTags(doc.getRootElement(), null);
}
}