WCS100CapabilitiesEvaluator.java

//$HeadURL$
/*----------------------------------------------------------------------------
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 Copyright (C) 2001-2009 by:
 - Department of Geography, University of Bonn -
 and
 - lat/lon GmbH -

 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
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 any later version.
 This library is distributed in the hope that it will be useful, but WITHOUT
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 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 details.
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 along with this library; if not, write to the Free Software Foundation, Inc.,
 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 Contact information:

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 Aennchenstr. 19, 53177 Bonn
 Germany
 http://lat-lon.de/

 Department of Geography, University of Bonn
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package org.deegree.igeo.dataadapter.wcs;

import java.net.MalformedURLException;
import java.net.URL;

import org.deegree.framework.xml.NamespaceContext;
import org.deegree.framework.xml.XMLFragment;
import org.deegree.framework.xml.XMLParsingException;
import org.deegree.framework.xml.XMLTools;
import org.deegree.ogcbase.CommonNamespaces;

/**
 * Helper class for extracting access points (URLs) from a WCS 1.0 capabilities document
 * 
 * @author <a href="mailto:name@deegree.org">Andreas Poth</a>
 * @author last edited by: $Author$
 * 
 * @version $Revision$, $Date$
 */
public class WCS100CapabilitiesEvaluator implements WCSCapabilitiesEvaluator {

    private XMLFragment xml;

    private static NamespaceContext nsContext = CommonNamespaces.getNamespaceContext();

    /*
     * (non-Javadoc)
     * 
     * @see org.deegree.igeo.dataadapter.WCSCapabilitiesEvaluator#setCapabilities(org.deegree.framework.xml.XMLFragment)
     */
    public void setCapabilities( XMLFragment xml ) {
        this.xml = xml;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.deegree.igeo.dataadapter.WCSCapabilitiesEvaluator#getDescribeCoverageHTTPGetURL()
     */
    public URL getDescribeCoverageHTTPGetURL()
                            throws XMLParsingException, MalformedURLException {
        String xPathQuery = "//wcs:DescribeCoverage/wcs:DCPType/wcs:HTTP/wcs:Get/wcs:OnlineResource/@xlink:href";
        String tmp = XMLTools.getRequiredNodeAsString( xml.getRootElement(), xPathQuery, nsContext );
        return new URL( tmp );
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.deegree.igeo.dataadapter.WCSCapabilitiesEvaluator#getGetCoverageHTTPGetURL()
     */
    public URL getGetCoverageHTTPGetURL()
                            throws XMLParsingException, MalformedURLException {
        String xPathQuery = "//wcs:GetCoverage/wcs:DCPType/wcs:HTTP/wcs:Get/wcs:OnlineResource/@xlink:href";
        String tmp = XMLTools.getRequiredNodeAsString( xml.getRootElement(), xPathQuery, nsContext );
        return new URL( tmp );
    }

}