PackageDatabaseParserWorker.java

/*
Copyright 2009 Hauke Rehfeld


This file is part of QuakeInjector.

QuakeInjector 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.

QuakeInjector 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 QuakeInjector.  If not, see <http://www.gnu.org/licenses/>.
*/
package de.haukerehfeld.quakeinjector;

//import java.awt.*;
import java.io.InputStream;
import java.util.List;

import javax.swing.SwingWorker;

/**
 * Parse database xml and set database in background
 */
public class PackageDatabaseParserWorker extends SwingWorker<List<Requirement>, Void>
	implements ProgressListener {
	private final String databaseUrl;
	
	public PackageDatabaseParserWorker(String databaseUrl) {
		this.databaseUrl = databaseUrl;
	}
	
	@Override
	public List<Requirement> doInBackground() throws java.io.IOException, org.xml.sax.SAXException {
		InputStream dl = getDownloadStream(this.databaseUrl);
		
		final PackageDatabaseParser parser = new PackageDatabaseParser();
		List<Requirement> all = parser.parse(XmlUtils.getDocument(dl));

		return all;
	}


	@Override
	public void done() {
	}

	private InputStream getDownloadStream(final String databaseUrl) throws java.io.IOException {
		//get download stream
		Download d = Download.create(databaseUrl);
		d.connect();
		int size = d.getSize();
		InputStream dl;
		if (size > 0) {
			ProgressListener progress =
			    new SumProgressListener(new PercentageProgressListener(size, this));
			dl = d.getStream(progress);
		}
		else {
			dl = d.getStream(null);
		}
		return dl;
	}
	

	public void publish(long progress) {
		if (progress <= 100) {
			setProgress((int) progress);
		}
	}
	
}