org.lunifera.vaaclipse.ui.preferences.addon.internal.impexp.ExportPreferences.java Source code

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Here is the source code for org.lunifera.vaaclipse.ui.preferences.addon.internal.impexp.ExportPreferences.java

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/**
 * Copyright (c) 2011 - 2015, Lunifera GmbH (Gross Enzersdorf), Loetz KG (Heidelberg)
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *         Florian Pirchner - Initial implementation
 */
package org.lunifera.vaaclipse.ui.preferences.addon.internal.impexp;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.List;

import org.eclipse.core.internal.preferences.PreferencesService;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.preferences.IEclipsePreferences;
import org.eclipse.core.runtime.preferences.IPreferenceFilter;
import org.lunifera.vaaclipse.ui.preferences.model.PreferencesPage;
import org.semanticsoft.vaadin.optiondialog.OptionDialog;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.vaadin.server.FileDownloader;
import com.vaadin.server.StreamResource;
import com.vaadin.server.StreamResource.StreamSource;
import com.vaadin.ui.Button;
import com.vaadin.ui.Component;
import com.vaadin.ui.CssLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.themes.BaseTheme;

/**
 * @author rushan
 *
 */
public class ExportPreferences extends BasicImpExp {

    Logger logger = LoggerFactory.getLogger(ExportPreferences.class);
    private CssLayout layout;
    private Button downloadButton;
    private byte[] preferencesBytes;

    @Override
    public Component getComponent(OptionDialog optionDialog) {

        layout = new CssLayout();
        layout.addStyleName("export");
        layout.addComponent(new Label("Select preferences to export"));
        createPreferencesTable(layout);

        createStatusLabel(layout, "Press Export to export preferences");

        return layout;
    }

    @SuppressWarnings("serial")
    private StreamResource createResource() {
        return new StreamResource(new StreamSource() {
            @Override
            public InputStream getStream() {
                if (preferencesBytes != null) {
                    ByteArrayInputStream is = new ByteArrayInputStream(preferencesBytes);
                    return is;
                } else
                    return null;
            }
        }, "preferences.epf");
    }

    @SuppressWarnings("restriction")
    @Override
    protected void doAction() {
        // dlg.close();

        List<PreferencesPage> selectedPages = getSelectedPages();
        if (selectedPages.isEmpty()) {
            setStatusText("Preferences doesn't selected. Please select preferences above.");
            return;
        }

        IEclipsePreferences root = PreferencesService.getDefault().getRootNode();

        ByteArrayOutputStream baos = new ByteArrayOutputStream(200);

        try {
            PreferencesService.getDefault().exportPreferences(root,
                    new IPreferenceFilter[] { createFilter(selectedPages) }, baos);
        } catch (CoreException e) {
            logger.error("Exception when export preferences", e);
            return;
        }

        preferencesBytes = baos.toByteArray();

        StringBuffer exportedPrefNames = toTextWithCatName(selectedPages);

        setStatusText("Preferences was exported: " + exportedPrefNames.toString());

        if (downloadButton == null) {
            downloadButton = new Button(BaseTheme.BUTTON_LINK);
            downloadButton.addStyleName("download-button");
            downloadButton.setCaption("Download preferences.epf");
            layout.addComponent(downloadButton);

            FileDownloader fileDownloader = new FileDownloader(createResource());
            fileDownloader.extend(downloadButton);
        }
    }

    @Override
    protected String getActionName() {
        return "Export";
    }
}