/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.binding.feed.provider;
import java.io.IOException;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;
import com.sun.syndication.feed.atom.Content;
import com.sun.syndication.feed.atom.Entry;
import com.sun.syndication.feed.atom.Feed;
import com.sun.syndication.io.FeedException;
import com.sun.syndication.io.WireFeedInput;
import com.sun.syndication.io.WireFeedOutput;
/**
* Utility methods to read/write Atom entries.
*
* @version $Rev: 611546 $ $Date: 2008-01-13 00:34:14 -0800 (Sun, 13 Jan 2008) $
*/
class AtomFeedEntryUtil {
/**
* Read an Atom entry
*
* @param request
* @return
* @throws IOException
* @throws JDOMException
* @throws FeedException
* @throws IllegalArgumentException
*/
static Entry readFeedEntry(String feedType, Reader reader) throws JDOMException, IOException, IllegalArgumentException,
FeedException {
SAXBuilder builder = new SAXBuilder();
Document document = builder.build(reader);
Element root = document.getRootElement();
root.detach();
Feed feed = new Feed();
feed.setFeedType(feedType);
WireFeedOutput wireFeedOutput = new WireFeedOutput();
document = wireFeedOutput.outputJDom(feed);
document.getRootElement().addContent(root);
WireFeedInput input = new WireFeedInput();
feed = (Feed)input.build(document);
Entry feedEntry = (Entry)feed.getEntries().get(0);
if (feedEntry.getContents().size() != 0) {
Content content = (Content)feedEntry.getContents().get(0);
if ("text/xml".equals(content.getType())) {
Element element = root.getChild("content", root.getNamespace());
if (!element.getChildren().isEmpty()) {
element = (Element)element.getChildren().get(0);
XMLOutputter outputter = new XMLOutputter();
StringWriter sw = new StringWriter();
outputter.output(element, sw);
content.setValue(sw.toString());
}
}
}
return feedEntry;
}
/**
* Write an Atom entry.
*
* @param entry
* @param response
* @throws FeedException
* @throws IllegalArgumentException
* @throws IOException
* @throws ServletException
*/
static void writeFeedEntry(Entry feedEntry, String feedType, Writer writer) throws IllegalArgumentException, FeedException,
IOException {
Feed feed = new Feed();
feed.setFeedType(feedType);
List<Entry> feedEntries = new ArrayList<Entry>();
feedEntries.add(feedEntry);
feed.setEntries(feedEntries);
WireFeedOutput wireFeedOutput = new WireFeedOutput();
Document document = wireFeedOutput.outputJDom(feed);
Element root = document.getRootElement();
Element element = (Element)root.getChildren().get(0);
XMLOutputter outputter = new XMLOutputter();
outputter.setFormat(Format.getPrettyFormat());
outputter.output(element, writer);
}
}