LoadTask.java

/*
Copyright 2008-2010 Gephi
Authors : Mathieu Bastian <mathieu.bastian@gephi.org>
Website : http://www.gephi.org

This file is part of Gephi.

Gephi is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

Gephi 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 Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with Gephi.  If not, see <http://www.gnu.org/licenses/>.
*/
package org.gephi.project.io;

import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.gephi.project.impl.ProjectImpl;
import org.gephi.project.impl.ProjectInformationImpl;
import org.gephi.project.api.Project;
import org.gephi.project.impl.ProjectControllerImpl;
import org.gephi.utils.longtask.spi.LongTask;
import org.gephi.utils.progress.Progress;
import org.gephi.utils.progress.ProgressTicket;
import org.openide.filesystems.FileObject;
import org.openide.filesystems.FileUtil;
import org.openide.util.Lookup;
import org.openide.util.NbBundle;
import org.w3c.dom.Document;

/**
 *
 * @author Mathieu Bastian
 */
public class LoadTask implements LongTask, Runnable {

    private File file;
    private GephiReader gephiReader;
    private boolean cancel = false;
    private ProgressTicket progressTicket;

    public LoadTask(File file) {
        this.file = file;
    }

    public void run() {
        try {
            Progress.start(progressTicket);
            Progress.setDisplayName(progressTicket, NbBundle.getMessage(SaveTask.class, "LoadTask.name"));
            FileObject fileObject = FileUtil.toFileObject(file);
            if (FileUtil.isArchiveFile(fileObject)) {
                //Unzip
                fileObject = FileUtil.getArchiveRoot(fileObject).getChildren()[0];
            }

            //Parse documcent
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document doc = builder.parse(fileObject.getInputStream());

            if (!cancel) {
                //Project instance
                Project project = new ProjectImpl();
                project.getLookup().lookup(ProjectInformationImpl.class).setFile(file);

                //Version
                String version = doc.getDocumentElement().getAttribute("version");
                if (version == null || version.isEmpty() || Double.parseDouble(version) != 0.7) {
                    throw new GephiFormatException("Gephi project file version must be at least 0.7");
                }

                //GephiReader
                gephiReader = new GephiReader();
                project = gephiReader.readAll(doc.getDocumentElement(), project);

                //Add project
                if (!cancel) {
                    ProjectControllerImpl pc = Lookup.getDefault().lookup(ProjectControllerImpl.class);
                    pc.openProject(project);
                }
            }
            Progress.finish(progressTicket);
        } catch (Exception ex) {
            ex.printStackTrace();
            if (ex instanceof GephiFormatException) {
                throw (GephiFormatException) ex;
            }
            throw new GephiFormatException(GephiReader.class, ex);
        }
    }

    public boolean cancel() {
        cancel = true;
        if (gephiReader != null) {
            gephiReader.cancel();
        }
        return true;
    }

    public void setProgressTicket(ProgressTicket progressTicket) {
        this.progressTicket = progressTicket;
    }
}