    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/portal/standard/gazetteer/LoadItemsListListener.java $
    002    /*----------------------------------------------------------------------------
    003     This file is part of deegree, http://deegree.org/
    004     Copyright (C) 2001-2009 by:
    005     - Department of Geography, University of Bonn -
    006     and
    007     - lat/lon GmbH -
    008
    009     This library is free software; you can redistribute it and/or modify it under
    010     the terms of the GNU Lesser General Public License as published by the Free
    011     Software Foundation; either version 2.1 of the License, or (at your option)
    012     any later version.
    013     This library is distributed in the hope that it will be useful, but WITHOUT
    014     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    015     FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
    016     details.
    017     You should have received a copy of the GNU Lesser General Public License
    018     along with this library; if not, write to the Free Software Foundation, Inc.,
    019     59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    020
    021     Contact information:
    022
    023     lat/lon GmbH
    024     Aennchenstr. 19, 53177 Bonn
    025     Germany
    026     http://lat-lon.de/
    027
    028     Department of Geography, University of Bonn
    029     Prof. Dr. Klaus Greve
    030     Postfach 1147, 53001 Bonn
    031     Germany
    032     http://www.geographie.uni-bonn.de/deegree/
    033
    034     e-mail: info@deegree.org
    035     ----------------------------------------------------------------------------*/
    036    package org.deegree.portal.standard.gazetteer;
    037
    038    import java.io.IOException;
    039    import java.nio.charset.Charset;
    040    import java.util.List;
    041    import java.util.Map;
    042
    043    import org.deegree.datatypes.QualifiedName;
    044    import org.deegree.enterprise.control.ajax.ResponseHandler;
    045    import org.deegree.enterprise.control.ajax.WebEvent;
    046    import org.deegree.framework.log.ILogger;
    047    import org.deegree.framework.log.LoggerFactory;
    048    import org.deegree.framework.util.Parameter;
    049    import org.deegree.portal.Constants;
    050    import org.deegree.portal.context.Module;
    051    import org.deegree.portal.context.ViewContext;
    052
    053    /**
    054     * TODO add class documentation here
    055     *
    056     * @author <a href="mailto:name@deegree.org">Andreas Poth</a>
    057     * @author last edited by: $Author: apoth $
    058     *
    059     * @version $Revision: 26650 $, $Date: 2010-09-09 09:41:31 +0200 (Do, 09. Sep 2010) $
    060     */
    061    public class LoadItemsListListener extends AbstractGazetteerListener {
    062
    063        private static final ILogger LOG = LoggerFactory.getLogger( LoadItemsListListener.class );
    064
    065        /*
    066         * (non-Javadoc)
    067         *
    068         * @see
    069         * org.deegree.enterprise.control.ajax.AbstractListener#actionPerformed(org.deegree.enterprise.control.ajax.WebEvent
    070         * , org.deegree.enterprise.control.ajax.ResponseHandler)
    071         */
    072        @SuppressWarnings("unchecked")
    073        public void actionPerformed( WebEvent event, ResponseHandler responseHandler )
    074                                throws IOException {
    075            Map<String, Object> param = event.getParameter();
    076            int index = ( (Number) param.get( "level" ) ).intValue();
    077            int hierarchyIndex = Integer.parseInt( (String) param.get( "hierarchyIndex" ) );
    078            String geographicIdentifier = (String) param.get( "geographicIdentifier" );
    079
    080            ViewContext vc = (ViewContext) event.getSession().getAttribute( Constants.CURRENTMAPCONTEXT );
    081            Module[] modules = vc.getGeneral().getExtension().getFrontend().getModulesByName( "Gazetteer" );
    082            Parameter[] parameters = modules[0].getParameter().getParameters();
    083            // just one gazetteer module is allowed to be contained in an instance of iGeoPortal
    084            Hierarchy hierarchy;
    085            try {
    086                hierarchy = loadHierarchy( (String) parameters[hierarchyIndex].getValue() );
    087            } catch ( Exception e ) {
    088                LOG.logError( e );
    089                responseHandler.writeAndClose( "ERROR: can not load hierarchy list" );
    090                return;
    091            }
    092            HierarchyNode node = hierarchy.getRoot();
    093            int k = 0;
    094            while ( node != null && k < index ) {
    095                node = node.getChildNode();
    096                k++;
    097            }
    098            QualifiedName ft = node.getFeatureType();
    099            FindChildrenCommand cmd = new FindChildrenCommand(hierarchy.getGazetteerAddress(),ft,node.getProperties(),geographicIdentifier);
    100            List<GazetteerItem> items;
    101            try {
    102                items = cmd.execute();
    103            } catch ( Exception e ) {
    104                LOG.logError( e );
    105                responseHandler.writeAndClose( "ERROR: could not find/load items for geographicIdentifier: " + geographicIdentifier );
    106                return;
    107            }
    108            String charEnc = Charset.defaultCharset().displayName();
    109            responseHandler.setContentType( "application/json; charset=" + charEnc );
    110            responseHandler.writeAndClose( false, items );
    111
    112        }
    113
    114    }