package org.jtheque.messages.impl;
/*
* Copyright JTheque (Baptiste Wicht)
*
* Licensed 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.
*/
import org.jtheque.messages.Message;
import org.jtheque.utils.bean.IntDate;
import org.jtheque.utils.collections.CollectionUtils;
import org.jtheque.utils.io.FileUtils;
import org.jtheque.xml.utils.XMLReader;
import org.jtheque.xml.utils.XML;
import org.jtheque.xml.utils.XMLException;
import org.w3c.dom.Node;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
/**
* @author Baptiste Wicht
*/
final class MessageFileReader {
/**
* Construct a new MessageFileReader. This constructor is private because all methods are static.
*/
private MessageFileReader() {
throw new AssertionError();
}
/**
* Read a messages file and return all the messages of the file.
*
* @param strUrl The URL of the file.
*
* @return The messages.
*
* @throws XMLException If there is an error reading the messages file.
*/
public static Collection<Message> readMessagesFile(String strUrl) throws XMLException {
URL url;
try {
url = new URL(strUrl);
} catch (MalformedURLException e) {
throw new XMLException("URL Invalid ", e);
}
return readMessagesFile(url);
}
/**
* Read a messages file and return all the messages of the file.
*
* @param url The URL of the file.
*
* @return The messages.
*
* @throws XMLException Thrown when an error occurs during the reading.
*/
private static Collection<Message> readMessagesFile(URL url) throws XMLException {
XMLReader<Node> reader = XML.newJavaFactory().newReader();
reader.openURL(url);
String source = reader.readString("source", reader.getRootElement());
List<Message> messages = CollectionUtils.newList();
for (Object currentNode : reader.getNodes("message", reader.getRootElement())) {
messages.add(Messages.newMessage(
reader.readInt("@id", currentNode),
reader.readString("title", currentNode),
reader.readString("content", currentNode),
new IntDate(reader.readInt("date", currentNode)),
source));
}
Collections.sort(messages);
FileUtils.close(reader);
return messages;
}
}