org.kalypso.gml.ui.coverage.CoverageManagementHelper.java Source code

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Here is the source code for org.kalypso.gml.ui.coverage.CoverageManagementHelper.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 *
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 *
 *  and
 *
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 *
 *  This library 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 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact:
 *
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *
 *  ---------------------------------------------------------------------------*/
package org.kalypso.gml.ui.coverage;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.commons.io.FileUtils;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Status;
import org.kalypso.contribs.eclipse.core.resources.ResourceUtilities;
import org.kalypso.gml.ui.KalypsoGmlUIPlugin;
import org.kalypso.gml.ui.i18n.Messages;
import org.kalypsodeegree.model.coverage.RangeSetFile;
import org.kalypsodeegree.model.feature.GMLWorkspace;
import org.kalypsodeegree_impl.gml.binding.commons.ICoverage;

/**
 * @author Thomas Jung
 */
public class CoverageManagementHelper {
    /**
     * Returns an existing grid file.<br>
     */
    private static File toJavaFile(final URL url) {
        /* Tries to find a file from the given url. */
        File fileFromUrl = ResourceUtilities.findJavaFileFromURL(url);

        if (fileFromUrl == null)
            fileFromUrl = FileUtils.toFile(url);

        return fileFromUrl;
    }

    /**
     * Returns the underlying grid file for a given coverage as {@link URL}.
     *
     * @return <code>null</code> of no underlying file is defined.
     */
    public static URL getFileLocation(final ICoverage coverage) throws CoreException {
        final GMLWorkspace workspace = coverage.getWorkspace();

        final Object rangeSet = coverage.getRangeSet();
        if (!(rangeSet instanceof RangeSetFile))
            return null;

        final String fileName = ((RangeSetFile) rangeSet).getFileName();

        try {
            return new URL(workspace.getContext(), fileName);
        } catch (final MalformedURLException e) {
            final IStatus status = new Status(IStatus.ERROR, KalypsoGmlUIPlugin.id(),
                    Messages.getString("org.kalypso.gml.ui.map.CoverageManagementHelper0"), e); //$NON-NLS-1$
            throw new CoreException(status);
        }
    }

    /**
     * Deletes the referenced file of a coverage, if it exists.
     */
    public static IStatus deleteRangeSetFile(final ICoverage coverage) {
        try {
            final URL fileLocation = getFileLocation(coverage);
            if (fileLocation == null)
                return Status.OK_STATUS;

            deleteFile(fileLocation);
        } catch (final CoreException e) {
            return e.getStatus();
        }

        return Status.OK_STATUS;
    }

    /**
     * Deletes a file given by a URL. Useful for grid locations.
     */
    public static void deleteFile(final URL url) throws CoreException {
        final File gridFile = toJavaFile(url);
        if (gridFile != null)
            gridFile.delete();

        final IFile eclipseFile = ResourceUtilities.findFileFromURL(url);
        if (eclipseFile != null)
            eclipseFile.getParent().refreshLocal(IResource.DEPTH_ONE, new NullProgressMonitor());
    }
}