org.kalypso.simulation.core.KalypsoSimulationCoreJaxb.java Source code

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Here is the source code for org.kalypso.simulation.core.KalypsoSimulationCoreJaxb.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.simulation.core;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;

import org.apache.commons.io.IOUtils;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.kalypso.commons.bind.JaxbUtilities;
import org.kalypso.simulation.core.simspec.Modeldata;
import org.kalypso.simulation.core.simspec.Modelspec;

/**
 * @author Belger
 */
public class KalypsoSimulationCoreJaxb {
    private static final String STR_FAILED_TO_LOAD_SIMULATION_SPECIFICATION = "Failed to load simulation specification"; //$NON-NLS-1$

    private static final JAXBContext JC = JaxbUtilities
            .createQuiet(org.kalypso.simulation.core.simspec.ObjectFactory.class);

    private static Unmarshaller createUnmarshaller() {
        try {
            return JC.createUnmarshaller();
        } catch (final JAXBException e) {
            // will not happen
            e.printStackTrace();
            return null;
        }
    }

    public static Modeldata readModeldata(final IFile file) throws CoreException {
        final InputStream contents = file.getContents();
        return (Modeldata) unmarshallAndCloseStream(contents);
    }

    public static Modelspec readModelspec(final URL location) throws CoreException {
        try {
            final InputStream contents = location.openStream();
            return (Modelspec) unmarshallAndCloseStream(contents);
        } catch (final IOException e) {
            final IStatus status = new Status(IStatus.ERROR, KalypsoSimulationCorePlugin.getID(),
                    STR_FAILED_TO_LOAD_SIMULATION_SPECIFICATION);
            throw new CoreException(status);
        }
    }

    private static Object unmarshallAndCloseStream(final InputStream contents) throws CoreException {
        try {
            final Unmarshaller unmarshaller = KalypsoSimulationCoreJaxb.createUnmarshaller();
            final Object unmarshal = unmarshaller.unmarshal(contents);
            contents.close();
            return unmarshal;
        } catch (final JAXBException e) {
            final IStatus status = new Status(IStatus.ERROR, KalypsoSimulationCorePlugin.getID(),
                    STR_FAILED_TO_LOAD_SIMULATION_SPECIFICATION);
            throw new CoreException(status);
        } catch (final IOException e) {
            final IStatus status = new Status(IStatus.ERROR, KalypsoSimulationCorePlugin.getID(),
                    STR_FAILED_TO_LOAD_SIMULATION_SPECIFICATION);
            throw new CoreException(status);
        } finally {
            IOUtils.closeQuietly(contents);
        }
    }

}