/*
Copyright (C) 2010 maik.jablonski@gmail.com
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package jfix.db4o.xstream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
/**
* Wrapper around XStream to write/retrieve collection of objects to/from
* specified file.
*/
public class XStreamFile {
private String filename;
public XStreamFile(String filename) {
this.filename = filename;
}
/**
* Writes objects to XML-File.
*/
public void write(Collection objects) {
try {
XStream xstream = new XStream(new DomDriver());
xstream.setMode(XStream.ID_REFERENCES);
FileWriter writer = new FileWriter(filename);
xstream.toXML(new ArrayList(objects), writer);
writer.close();
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
/**
* Reads collection from XML-File.
*/
public Collection read() {
try {
XStream xstream = new XStream(new DomDriver());
xstream.setMode(XStream.ID_REFERENCES);
FileReader reader = new FileReader(filename);
List objects = (List) xstream.fromXML(reader);
reader.close();
return objects;
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
}