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.util.ArrayList;
039 import java.util.Enumeration;
040 import java.util.HashMap;
041 import java.util.List;
042 import java.util.Map;
043 import java.util.concurrent.Callable;
044
045 import javax.servlet.http.HttpServletRequest;
046
047 import org.apache.commons.httpclient.HttpMethod;
048 import org.deegree.framework.concurrent.ExecutionFinishedEvent;
049 import org.deegree.framework.concurrent.Executor;
050 import org.deegree.framework.log.ILogger;
051 import org.deegree.framework.log.LoggerFactory;
052 import org.deegree.framework.util.HttpUtils;
053 import org.deegree.framework.util.Pair;
054 import org.deegree.framework.xml.NamespaceContext;
055 import org.deegree.framework.xml.XMLFragment;
056 import org.deegree.framework.xml.XMLTools;
057 import org.deegree.ogcbase.CommonNamespaces;
058 import org.deegree.ogcwebservices.csw.discovery.GetRecords;
059 import org.deegree.ogcwebservices.csw.discovery.XMLFactory;
060 import org.w3c.dom.Element;
061 import org.w3c.dom.Node;
062
063 /**
064 * TODO add class documentation here
065 *
066 * @author <a href="mailto:name@deegree.org">Andreas Poth</a>
067 * @author last edited by: $Author: admin $
068 *
069 * @version $Revision: $, $Date: $
070 */
071 abstract class AbstractSearchListener extends AbstractMetadataListener {
072
073 private static final ILogger LOG = LoggerFactory.getLogger( AbstractSearchListener.class );
074
075 protected CatalogueManagerConfiguration config;
076
077 protected List<SearchResultInfo> searchResultInfos = new ArrayList<SearchResultInfo>();
078
079 protected static NamespaceContext nsc = CommonNamespaces.getNamespaceContext();
080
081 /**
082 *
083 * @param getRecords
084 * @return
085 * @throws Throwable
086 */
087 protected List<Pair<String, XMLFragment>> performQuery( GetRecords getRecords )
088 throws Throwable {
089 XMLFragment gr = XMLFactory.exportWithVersion( getRecords );
090 LOG.logDebug( "GetRecords request: ", gr.getAsPrettyString() );
091 List<String> csw = config.getSearchableCSW();
092 List<Callable<XMLFragment>> callables = new ArrayList<Callable<XMLFragment>>();
093 callables.add( new GetRecordsCallable( config.getCatalogueURL(), gr ) );
094 for ( String address : csw ) {
095 callables.add( new GetRecordsCallable( address, gr ) );
096 }
097
098 Executor exe = Executor.getInstance();
099 List<ExecutionFinishedEvent<XMLFragment>> events = exe.performSynchronously( callables );
100
101 List<Pair<String, XMLFragment>> result = new ArrayList<Pair<String, XMLFragment>>();
102
103 String xpath1 = "csw202:SearchResults/@numberOfRecordsReturned";
104 String xpath2 = "csw202:SearchResults/@numberOfRecordsMatched";
105 for ( ExecutionFinishedEvent<XMLFragment> executionFinishedEvent : events ) {
106 SearchResultInfo sri = new SearchResultInfo();
107 XMLFragment xml = executionFinishedEvent.getResult();
108 String cswAddress = ( (GetRecordsCallable) executionFinishedEvent.getTask() ).getCsw();
109 // store meta information for search result
110 sri.setNumberOfRecordsReturned( XMLTools.getNodeAsInt( xml.getRootElement(), xpath1, nsc, 0 ) );
111 sri.setNumberOfRecordsMatched( XMLTools.getNodeAsInt( xml.getRootElement(), xpath2, nsc, 0 ) );
112 sri.setCswURL( cswAddress );
113 // TODO
114 // set catalogue name to search result info
115 searchResultInfos.add( sri );
116 result.add( new Pair<String, XMLFragment>( cswAddress, xml ) );
117 if ( LOG.getLevel() == ILogger.LOG_DEBUG ) {
118 LOG.logDebug( "queried catalogue: ", cswAddress );
119 if ( LOG.getLevel() == ILogger.LOG_DEBUG ) {
120 LOG.logDebug( xml.getAsPrettyString() );
121 }
122 }
123 }
124 return result;
125 }
126
127 /**
128 * @param result
129 * first parameter of pair contains CSW URL second one contains GetRecords result
130 * @return first string of pair contains CSW URL second one contains formatted GetRecords result
131 * @throws Exception
132 */
133 protected List<SearchResultBean> formatResult( List<Pair<String, XMLFragment>> result )
134 throws Exception {
135 List<SearchResultBean> formattedResult = new ArrayList<SearchResultBean>();
136
137 for ( Pair<String, XMLFragment> pair : result ) {
138 List<Node> nodes = XMLTools.getNodes( pair.second.getRootElement(), "./csw202:SearchResults/*", nsc );
139 for ( Node node : nodes ) {
140 Element root = (Element) node;
141 try {
142 SearchResultBean srb = new SearchResultBean();
143 srb.setCsw( pair.first );
144 String s = XMLTools.getNodeAsString( root, config.getXPath( "abstract_" ), nsc, "-" );
145 srb.setAbstr( s );
146
147 s = XMLTools.getNodeAsString( root, config.getXPath( "identifier" ), nsc, "" );
148 if ( s == null ) {
149 s = XMLTools.getNodeAsString( root, config.getXPath( "resourceIdentifier1" ), nsc, null );
150 }
151 if ( s == null ) {
152 s = XMLTools.getNodeAsString( root, config.getXPath( "resourceIdentifier2" ), nsc, null );
153 }
154 if ( s == null ) {
155 s = XMLTools.getNodeAsString( root, config.getXPath( "srvResourceIdentifier1" ), nsc, null );
156 }
157 if ( s == null ) {
158 s = XMLTools.getNodeAsString( root, config.getXPath( "srvResourceIdentifier2" ), nsc, null );
159 }
160
161 srb.setId( s );
162 s = XMLTools.getNodeAsString( root, config.getXPath( "serviceTitle" ), nsc, null );
163 if ( s == null ) {
164 s = XMLTools.getRequiredNodeAsString( root, config.getXPath( "datasetTitle" ), nsc );
165 }
166 srb.setTitle( s );
167 s = XMLTools.getNodeAsString( root, config.getXPath( "modified" ), nsc, "-" );
168 srb.setModified( s );
169 s = XMLTools.getRequiredNodeAsString( root, config.getXPath( "hlevel" ), nsc );
170 srb.setHierarchyLevel( s );
171 s = XMLTools.getNodeAsString( root, config.getXPath( "overview" ), nsc, null );
172 srb.setOverview( s );
173 String west = XMLTools.getNodeAsString( root, config.getXPath( "srvWest" ), nsc, null );
174 if ( west == null ) {
175 west = XMLTools.getRequiredNodeAsString( root, config.getXPath( "west" ), nsc );
176 }
177 String east = XMLTools.getNodeAsString( root, config.getXPath( "srvEast" ), nsc, null );
178 if ( east == null ) {
179 east = XMLTools.getRequiredNodeAsString( root, config.getXPath( "east" ), nsc );
180 }
181 String south = XMLTools.getNodeAsString( root, config.getXPath( "srvSouth" ), nsc, null );
182 if ( south == null ) {
183 south = XMLTools.getRequiredNodeAsString( root, config.getXPath( "south" ), nsc );
184 }
185 String north = XMLTools.getNodeAsString( root, config.getXPath( "srvNorth" ), nsc, null );
186 if ( north == null ) {
187 north = XMLTools.getRequiredNodeAsString( root, config.getXPath( "north" ), nsc );
188 }
189 srb.setBbox( west + ' ' + south + ' ' + east + ' ' + north );
190 formattedResult.add( srb );
191 } catch ( Exception e ) {
192 LOG.logError( e );
193 }
194 }
195 }
196 return formattedResult;
197 }
198
199 // ////////////////////////////////////////////////////////////////////////////////////////////////////
200 // inner classes
201 // ////////////////////////////////////////////////////////////////////////////////////////////////////
202
203 private class GetRecordsCallable implements Callable<XMLFragment> {
204
205 private String csw;
206
207 private XMLFragment getRecords;
208
209 /**
210 *
211 * @param csw
212 * @param getRecords
213 */
214 GetRecordsCallable( String csw, XMLFragment getRecords ) {
215 this.csw = csw;
216 this.getRecords = getRecords;
217 }
218
219 /**
220 * @return the csw
221 */
222 public String getCsw() {
223 return csw;
224 }
225
226 /*
227 * (non-Javadoc)
228 *
229 * @see java.util.concurrent.Callable#call()
230 */
231 @SuppressWarnings("unchecked")
232 public XMLFragment call()
233 throws Exception {
234 LOG.logDebug( "connect to: ", csw );
235 Enumeration<String> en = ((HttpServletRequest)getRequest()).getHeaderNames();
236 Map<String, String> map = new HashMap<String, String>();
237 while ( en.hasMoreElements() ) {
238 String name = (String) en.nextElement();
239 map.put( name, ((HttpServletRequest)getRequest()).getHeader( name ) );
240 }
241 HttpMethod method = HttpUtils.performHttpPost( csw, getRecords, 60000, null, null, map );
242 XMLFragment xml = new XMLFragment();
243 xml.load( method.getResponseBodyAsStream(), csw );
244 return xml;
245 }
246
247 }
248
249 }