    001    //$HeadURL: svn+ssh://developername@svn.wald.intevation.org/deegree/base/trunk/resources/eclipse/files_template.xml $
    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.cataloguemanager.control;
    037
    038    import java.io.IOException;
    039    import java.nio.charset.Charset;
    040    import java.util.ArrayList;
    041    import java.util.HashMap;
    042    import java.util.List;
    043    import java.util.Map;
    044    import java.util.UUID;
    045
    046    import org.deegree.datatypes.QualifiedName;
    047    import org.deegree.enterprise.control.ajax.ResponseHandler;
    048    import org.deegree.enterprise.control.ajax.WebEvent;
    049    import org.deegree.framework.log.ILogger;
    050    import org.deegree.framework.log.LoggerFactory;
    051    import org.deegree.framework.util.Pair;
    052    import org.deegree.framework.xml.XMLFragment;
    053    import org.deegree.model.crs.CRSFactory;
    054    import org.deegree.model.crs.CoordinateSystem;
    055    import org.deegree.model.filterencoding.ComplexFilter;
    056    import org.deegree.model.filterencoding.Filter;
    057    import org.deegree.model.filterencoding.Literal;
    058    import org.deegree.model.filterencoding.LogicalOperation;
    059    import org.deegree.model.filterencoding.Operation;
    060    import org.deegree.model.filterencoding.OperationDefines;
    061    import org.deegree.model.filterencoding.PropertyIsBetweenOperation;
    062    import org.deegree.model.filterencoding.PropertyIsLikeOperation;
    063    import org.deegree.model.filterencoding.PropertyIsNullOperation;
    064    import org.deegree.model.filterencoding.PropertyName;
    065    import org.deegree.model.filterencoding.SpatialOperation;
    066    import org.deegree.model.spatialschema.Geometry;
    067    import org.deegree.model.spatialschema.GeometryFactory;
    068    import org.deegree.ogcbase.CommonNamespaces;
    069    import org.deegree.ogcbase.PropertyPath;
    070    import org.deegree.ogcbase.SortProperty;
    071    import org.deegree.ogcwebservices.csw.discovery.GetRecords;
    072    import org.deegree.ogcwebservices.csw.discovery.Query;
    073    import org.deegree.ogcwebservices.csw.discovery.GetRecords.RESULT_TYPE;
    074    import org.deegree.portal.cataloguemanager.model.ExceptionBean;
    075
    076    /**
    077     * TODO add class documentation here
    078     *
    079     * @author <a href="mailto:name@deegree.org">Andreas Poth</a>
    080     * @author last edited by: $Author: admin $
    081     *
    082     * @version $Revision: $, $Date: $
    083     */
    084    public class MetadataSearchListener extends AbstractSearchListener {
    085
    086        private static final ILogger LOG = LoggerFactory.getLogger( MetadataSearchListener.class );
    087
    088        // private String[] ignoredChars = new String[] { ",", ";", "\\.", "\\+", "\\(", "\\)" };
    089
    090        // private String[] cqp = new String[] { "{http://www.opengis.net/cat/csw/apiso/1.0}:Title" };
    091
    092        // private String[] timecqp = new String[] { "{http://www.opengis.net/cat/csw/apiso/1.0}:date" };
    093
    094        /*
    095         * (non-Javadoc)
    096         *
    097         * @see
    098         * org.deegree.enterprise.control.ajax.AbstractListener#actionPerformed(org.deegree.enterprise.control.ajax.WebEvent
    099         * , org.deegree.enterprise.control.ajax.ResponseHandler)
    100         */
    101        @SuppressWarnings("unchecked")
    102        public void actionPerformed( WebEvent event, ResponseHandler resp )
    103                                throws IOException {
    104
    105            config = getCatalogueManagerConfiguration( event );
    106            Map<String, String> param = event.getParameter();
    107            String query = param.get( "freeText" );
    108            String startDate = param.get( "from" );
    109            String endDate = param.get( "to" );
    110            String geographicIdentifier = param.get( "geogrID" );
    111            List<String> queryStrings = parseQuery( config, query );
    112            String bbox = getBBOX( geographicIdentifier );
    113            GetRecords getRecords;
    114            try {
    115                getRecords = createGetRecords( queryStrings, startDate, endDate, bbox );
    116            } catch ( Exception e ) {
    117                LOG.logError( e );
    118                ExceptionBean bean = new ExceptionBean( this.getClass().getName(), e.getMessage() );
    119                resp.writeAndClose( true, bean );
    120                return;
    121            }
    122            List<Pair<String, XMLFragment>> result;
    123            try {
    124                result = performQuery( getRecords );
    125            } catch ( Throwable e ) {
    126                LOG.logError( e );
    127                ExceptionBean bean = new ExceptionBean( this.getClass().getName(), e.getMessage() );
    128                resp.writeAndClose( true, bean );
    129                return;
    130            }
    131            List<SearchResultBean> formattedResult = null;
    132            try {
    133                formattedResult = formatResult( result );
    134            } catch ( Exception e ) {
    135                LOG.logError( e );
    136                ExceptionBean bean = new ExceptionBean( this.getClass().getName(), e.getMessage() );
    137                resp.writeAndClose( true, bean );
    138                return;
    139            }
    140
    141            // store search meta informations to be used for pageing
    142            event.getSession().setAttribute( SEARCHRESULTINFO, searchResultInfos );
    143
    144            int c = 0;
    145            for ( SearchResultInfo sri : searchResultInfos ) {
    146                c += sri.getNumberOfRecordsMatched();
    147            }
    148
    149            event.getSession().setAttribute( CURRENTSEARCH, getRecords );
    150            event.getSession().setAttribute( COUNTER, 0 );
    151
    152            String charEnc = Charset.defaultCharset().displayName();
    153            resp.setContentType( "application/json; charset=" + charEnc );
    154            resp.writeAndClose( false, new Object[] { formattedResult, new Integer( c ), new Integer( 0 ) } );
    155
    156        }
    157
    158        /**
    159         * @param queryStrings
    160         * @param startDate
    161         * @param endDate
    162         * @param bbox
    163         * @return GetRecord request
    164         * @throws Exception
    165         */
    166        private GetRecords createGetRecords( List<String> queryStrings, String startDate, String endDate, String bbox )
    167                                throws Exception {
    168            List<Operation> opList = new ArrayList<Operation>( queryStrings.size() + 3 );
    169            List<Operation> notOpList = new ArrayList<Operation>( queryStrings.size() + 3 );
    170            for ( String searchString : queryStrings ) {
    171                for ( String property : config.getSearchableProperties() ) {
    172                    PropertyName propertyName = new PropertyName( new QualifiedName( property ) );
    173                    Operation operation = null;
    174                    if ( searchString.startsWith( "-" ) ) {
    175                        Literal literal = new Literal( '*' + searchString.substring( 1 ) + '*' );
    176                        operation = new PropertyIsLikeOperation( propertyName, literal, '*', '?', '/', false );
    177                        List<Operation> tmp = new ArrayList<Operation>();
    178                        tmp.add( operation );
    179                        operation = new LogicalOperation( OperationDefines.NOT, tmp );
    180                        Operation notNull = new PropertyIsNullOperation( propertyName );
    181                        tmp = new ArrayList<Operation>();
    182                        tmp.add( operation );
    183                        tmp.add( notNull );
    184                        notOpList.add( new LogicalOperation( OperationDefines.OR, tmp ) );
    185                    } else {
    186                        Literal literal = new Literal( '*' + searchString + '*' );
    187                        operation = new PropertyIsLikeOperation( propertyName, literal, '*', '?', '/', false );
    188                        opList.add( operation );
    189                    }
    190
    191                }
    192            }
    193            LogicalOperation compare = null;
    194            if ( opList.size() > 1 && notOpList.size() > 0 ) {
    195                compare = new LogicalOperation( OperationDefines.OR, opList );
    196                notOpList.add( compare );
    197                compare = new LogicalOperation( OperationDefines.AND, notOpList );
    198            } else if ( opList.size() > 1 && notOpList.size() == 0 ) {
    199                compare = new LogicalOperation( OperationDefines.OR, opList );
    200            } else if ( opList.size() == 0 && notOpList.size() > 1 ) {
    201                compare = new LogicalOperation( OperationDefines.AND, notOpList );
    202            } else if ( opList.size() == 0 && notOpList.size() == 0 ) {
    203                compare = new LogicalOperation( OperationDefines.AND, notOpList );
    204            }
    205
    206            List<Operation> opTimeList = new ArrayList<Operation>( queryStrings.size() + 3 );
    207            for ( String property : config.getDateProperties() ) {
    208                PropertyName propertyName = new PropertyName( new QualifiedName( property ) );
    209                Literal start = new Literal( startDate );
    210                Literal end = new Literal( endDate );
    211                Operation operation = new PropertyIsBetweenOperation( propertyName, start, end );
    212                opTimeList.add( operation );
    213            }
    214
    215            List<Operation> allOps = new ArrayList<Operation>();
    216            if ( opList.size() > 1 || notOpList.size() > 1 ) {
    217                allOps.add( compare );
    218            } else if ( opList.size() == 1 && notOpList.size() == 1 ) {
    219                allOps.add( opList.get( 0 ) );
    220                allOps.add( notOpList.get( 0 ) );
    221            } else if ( opList.size() == 0 && notOpList.size() == 1 ) {
    222                allOps.add( notOpList.get( 0 ) );
    223            } else if ( opList.size() == 1 && notOpList.size() == 0 ) {
    224                allOps.add( opList.get( 0 ) );
    225            }
    226
    227            LogicalOperation time = new LogicalOperation( OperationDefines.OR, opTimeList );
    228            allOps.add( time );
    229
    230            if ( bbox != null ) {
    231                QualifiedName qn = new QualifiedName( "{http://www.opengis.net/cat/csw/apiso/1.0}:BoundingBox" );
    232                PropertyName propertyName = new PropertyName( qn );
    233                CoordinateSystem crs = CRSFactory.create( "EPSG:4326" );
    234                Geometry geom = GeometryFactory.createSurface( GeometryFactory.createEnvelope( bbox, crs ), crs );
    235                SpatialOperation sp = new SpatialOperation( OperationDefines.BBOX, propertyName, geom );
    236                allOps.add( sp );
    237            }
    238
    239            Filter filter = null;
    240            if ( allOps.size() > 1 ) {
    241                filter = new ComplexFilter( new LogicalOperation( OperationDefines.AND, allOps ) );
    242            } else {
    243                filter = new ComplexFilter( allOps.get( 0 ) );
    244            }
    245            List<QualifiedName> typeNames = new ArrayList<QualifiedName>();
    246            typeNames.add( new QualifiedName( "{http://www.isotc211.org/2005/gmd}:MD_Metadata" ) );
    247            SortProperty[] sortProperties = SortProperty.create( "apiso:Title",
    248                                                                 CommonNamespaces.getNamespaceContext().getNamespaceMap() );
    249            Query query = new Query( "brief", new ArrayList<QualifiedName>(), new HashMap<String, QualifiedName>(),
    250                                     new ArrayList<PropertyPath>(), filter, sortProperties, typeNames,
    251                                     new HashMap<String, QualifiedName>() );
    252            return new GetRecords( UUID.randomUUID().toString(), "2.0.2", null, null, RESULT_TYPE.RESULTS,
    253                                   "application/xml", "http://www.isotc211.org/2005/gmd", 1, config.getStepSize(), -1,
    254                                   null, query );
    255        }
    256
    257        /**
    258         * @param geographicIdentifier
    259         * @return
    260         */
    261        private String getBBOX( String geographicIdentifier ) {
    262            if ( geographicIdentifier != null ) {
    263                List<SpatialExtent> extents = config.getSpatialExtents();
    264                for ( SpatialExtent spatialExtent : extents ) {
    265                    if ( spatialExtent.getId().equalsIgnoreCase( geographicIdentifier ) ) {
    266                        return spatialExtent.getBbox();
    267                    }
    268                }
    269            }
    270            return null;
    271        }
    272
    273        /**
    274         *
    275         * @param config
    276         * @param query
    277         * @return
    278         */
    279        private List<String> parseQuery( CatalogueManagerConfiguration config, String query ) {
    280            char[] ignoredChars = config.getIgnoreCharacters();
    281            for ( int i = 0; i < ignoredChars.length; i++ ) {
    282                query = query.replace( ignoredChars[i], ' ' ).trim();
    283            }
    284            List<String> list = new ArrayList<String>();
    285            StringBuilder sb = new StringBuilder();
    286            boolean open = false;
    287            for ( int i = 0; i < query.length(); i++ ) {
    288                if ( query.charAt( i ) == ' ' && !open && sb.length() > 0 ) {
    289                    list.add( sb.toString() );
    290                    sb.delete( 0, sb.length() );
    291                } else if ( ( query.charAt( i ) == '"' || query.charAt( i ) == '\'' ) && !open ) {
    292                    open = true;
    293                } else if ( ( query.charAt( i ) == '"' || query.charAt( i ) == '\'' ) && open ) {
    294                    open = false;
    295                } else if ( query.charAt( i ) != ' ' || open ) {
    296                    sb.append( query.charAt( i ) );
    297                }
    298            }
    299            if ( sb.length() > 0 && sb.charAt( sb.length() - 1 ) != '"' && sb.charAt( sb.length() - 1 ) != '\'' ) {
    300                list.add( sb.toString() );
    301            }
    302            return list;
    303        }
    304
    305    }