org.kalypso.ogc.gml.featureview.control.AbstractImageFeatureControl.java Source code

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Here is the source code for org.kalypso.ogc.gml.featureview.control.AbstractImageFeatureControl.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.ogc.gml.featureview.control;

import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;

import javax.xml.XMLConstants;
import javax.xml.namespace.QName;

import org.apache.commons.lang3.StringUtils;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.URIUtil;
import org.kalypso.contribs.eclipse.core.resources.ResourceUtilities;
import org.kalypso.gmlschema.GMLSchemaUtilities;
import org.kalypso.gmlschema.property.IPropertyType;
import org.kalypsodeegree.model.feature.Feature;
import org.kalypsodeegree.model.feature.GMLWorkspace;

/**
 * @author Gernot Belger
 */
public abstract class AbstractImageFeatureControl extends AbstractFeatureControl {
    private static final QName QNAME_STRING = new QName(XMLConstants.W3C_XPATH_DATATYPE_NS_URI, "string"); //$NON-NLS-1$

    public AbstractImageFeatureControl(final IPropertyType ftp) {
        super(ftp);
    }

    public AbstractImageFeatureControl(final Feature feature, final IPropertyType ftp) {
        super(feature, ftp);
    }

    protected String getImagePath() {
        final Feature feature = getFeature();
        final IPropertyType pt = getFeatureTypeProperty();

        if (feature == null || pt == null || GMLSchemaUtilities.substitutes(feature.getFeatureType(), QNAME_STRING))
            return null;

        final String uriString = (String) feature.getProperty(pt);
        if (uriString == null)
            return ""; //$NON-NLS-1$

        return uriString;
    }

    protected URL resolveImagePath(final String imgPath) throws MalformedURLException, URISyntaxException {
        // REMARK: prevent empty string to resolve to gml file location
        if (StringUtils.isBlank(imgPath))
            return null;

        final Feature feature = getFeature();
        final GMLWorkspace workspace = feature.getWorkspace();
        final URL context = workspace.getContext();

        final URL location = new URL(context, imgPath);
        final URI uriEncoded = URIUtil.toURI(location);
        final URL urlEncoded = URIUtil.toURL(uriEncoded);

        return translateLocation(urlEncoded);
    }

    /** Translates platform url's to file url's */
    private URL translateLocation(final URL url) {
        if (url == null)
            return null;

        final IFile file = ResourceUtilities.findFileFromURL(url);
        if (file == null)
            return url;

        final URI locationURI = file.getLocationURI();
        if (locationURI == null)
            return url;

        try {
            return locationURI.toURL();
        } catch (final MalformedURLException e) {
            e.printStackTrace();
            return url;
        }
    }
}