org.polymap.biotop.model.importer.WaldbiotopeImportWizard.java Source code

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Here is the source code for org.polymap.biotop.model.importer.WaldbiotopeImportWizard.java

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/* 
 * polymap.org
 * Copyright (C) 2017, Falko Brutigam. All rights reserved.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 3.0 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 */
package org.polymap.biotop.model.importer;

import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipInputStream;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.Wizard;

import org.eclipse.ui.IImportWizard;
import org.eclipse.ui.IWorkbench;

import org.eclipse.core.runtime.IProgressMonitor;

import org.polymap.core.operation.OperationSupport;
import org.polymap.core.workbench.PolymapWorkbench;

import org.polymap.biotop.BiotopPlugin;

/**
 * 
 *
 * @author <a href="http://www.polymap.de">Falko Brutigam</a>
 */
public class WaldbiotopeImportWizard extends Wizard implements IImportWizard {

    private static final Log log = LogFactory.getLog(WaldbiotopeImportWizard.class);

    private WaldbiotopeImportPage page;

    /** The temporary dir to {@link #unpackZip(IProgressMonitor)} into. */
    private File zipDir;

    public void init(IWorkbench workbench, IStructuredSelection selection) {
        addPage(page = new WaldbiotopeImportPage());
    }

    public boolean performFinish() {
        try {
            WaldbiotopeImportOperation op = new WaldbiotopeImportOperation(zipDir);
            OperationSupport.instance().execute(op, true, true);
            return true;
        } catch (Exception e) {
            PolymapWorkbench.handleError(BiotopPlugin.PLUGIN_ID, this,
                    "Daten konnten nicht korrekt importiert werden.", e);
            return false;
        }
    }

    protected File[] unpackZip(InputStream in) throws ZipException, IOException {
        ZipInputStream zip = new ZipInputStream(in);
        try {
            zipDir = Files.createTempDirectory(WaldbiotopeImportOperation.class.getSimpleName()).toFile();
            FileUtils.forceDeleteOnExit(zipDir);

            ZipEntry entry = null;
            while ((entry = zip.getNextEntry()) != null) {
                log.info("ZIP entry: " + entry);

                File f = new File(zipDir, entry.getName());
                Files.copy(zip, f.toPath());
            }
            return zipDir.listFiles();
        } catch (Throwable e) {
            log.warn("", e);
            throw new RuntimeException(e);
        } finally {
            IOUtils.closeQuietly(zip);
        }
    }

}