control.Uploader.java Source code

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Here is the source code for control.Uploader.java

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/*******************************************************************************
 * QBiC Project Wizard enables users to create hierarchical experiments including different study
 * conditions using factorial design. Copyright (C) "2016" Andreas Friedrich
 *
 * 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 control;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStream;

import org.apache.commons.io.FilenameUtils;

import logging.Log4j2Logger;
import main.ProjectwizardUI;

import com.vaadin.ui.Panel;
import com.vaadin.ui.Upload;

/**
 * Uploader for tsv files
 * 
 * @author Andreas Friedrich
 * 
 */
@SuppressWarnings("serial")
public class Uploader implements Upload.SucceededListener, Upload.FailedListener, Upload.Receiver {

    private File file; // File to write to.
    private String error;

    private logging.Logger logger = new Log4j2Logger(Uploader.class);
    private String fileName;

    public Uploader() {
    }

    /**
     * Callback method to begin receiving the upload.
     */
    public OutputStream receiveUpload(String filename, String MIMEType) {
        FileOutputStream fos = null; // Output stream to write to
        error = null;
        fileName = filename;
        file = new File(ProjectwizardUI.tmpFolder + "up_" + filename);
        // TODO probably not needed; some browsers set MIME information to application/octet-stream,
        // which leads to bug
        // if (!MIMEType.equals("text/plain") && !MIMEType.equals("text/tab-separated-values")) {
        // error = "Wrong File type. Please only upload tsv or txt files.";
        // }
        try {
            // Open the file for writing.
            fos = new FileOutputStream(file);
        } catch (FileNotFoundException e) {
            // Error while opening the file. Not reported here.
            e.printStackTrace();
            return null;
        }
        return fos; // Return the output stream to write to
    }

    public String getError() {
        return error;
    }

    public String getBaseFileName() {
        return fileName;
    }

    public String getFileNameWithoutExtension() {
        return FilenameUtils.removeExtension(fileName);
    }

    public File getFile() {
        return file;
    }

    /**
     * This is called if the upload is finished.
     */
    public void uploadSucceeded(Upload.SucceededEvent event) {
        // Display the uploaded file in the image panel.
        logger.info("Uploading " + event.getFilename() + " of type '" + event.getMIMEType() + "' successful.");
    }

    /**
     * This is called if the upload fails.
     */
    public void uploadFailed(Upload.FailedEvent event) {
        // Log the failure on screen.
        logger.error("Uploading " + event.getFilename() + " of type '" + event.getMIMEType() + "' failed.");
    }
}