001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/ogcwebservices/csw/manager/HarvesterFactory.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.ogcwebservices.csw.manager;
037
038 import java.net.URI;
039 import java.util.Map;
040
041 import org.deegree.framework.xml.XMLFragment;
042 import org.deegree.ogcwebservices.InvalidParameterValueException;
043 import org.deegree.ogcwebservices.csw.manager.HarvestRepository.ResourceType;
044
045 /**
046 * returns an concrete instance of
047 *
048 * @see org.deegree.ogcwebservices.csw.manager.AbstractHarvester that is responsible for performing
049 * a harvest request against a source type assigned to the request. To decide which concrete
050 * Harvester is required the resourceType and, if neccessary, source parameter of a harvest
051 * request will be examinded.
052 *
053 * @version $Revision: 19482 $
054 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
055 * @author last edited by: $Author: lbuesching $
056 *
057 * @version 1.0. $Revision: 19482 $, $Date: 2009-09-03 10:06:22 +0200 (Do, 03 Sep 2009) $
058 *
059 * @since 2.0
060 */
061 public class HarvesterFactory {
062
063 private Map<ResourceType, AbstractHarvester> availableHarvester = null;
064
065 /**
066 * list of available Harvester
067 *
068 * @param availableHarvester
069 */
070 HarvesterFactory( Map<ResourceType, AbstractHarvester> availableHarvester ) {
071 this.availableHarvester = availableHarvester;
072 }
073
074 /**
075 * returns an concrete instance of
076 *
077 * @see org.deegree.ogcwebservices.csw.manager.AbstractHarvester that is responsible for
078 * performing a harvest request against a resource type assigned to the request. If no
079 * Harvester can be found that can be used to haverst the source defined in a harvest
080 * request an
081 *
082 * @param request
083 * @return the harvester
084 */
085 AbstractHarvester findHarvester( Harvest request )
086 throws InvalidParameterValueException {
087 URI uri = request.getResourceType();
088 ResourceType st = null;
089 if ( uri == null ) {
090 st = evaluateSource( request.getSource() );
091 } else {
092 String s = uri.toASCIIString();
093 if ( s.equals( "csw:profile" ) ) {
094 st = ResourceType.csw_profile;
095 } else if ( s.equals( "service" ) ) {
096 st = ResourceType.service;
097 } else if ( s.equals( "FGDC" ) ) {
098 st = ResourceType.FGDC;
099 } else if ( s.equals( "dublincore" ) ) {
100 st = ResourceType.dublincore;
101 } else if ( s.equals( "catalogue" ) ) {
102 st = ResourceType.catalogue;
103 } else if ( s.equals( "http://www.isotc211.org/schemas/2005/gmd" ) ) {
104 st = ResourceType.csw_profile;
105 } else {
106 String ms = "requested resourceType:" + s + " is not supported by the CS-W";
107 throw new InvalidParameterValueException( getClass().getName(), ms );
108 }
109 }
110 return availableHarvester.get( st );
111 }
112
113 /**
114 * determines the type of a metadata resource by evaluation the root element returned when
115 * accessing it.
116 *
117 * @param source
118 * @return the type
119 * @throws InvalidParameterValueException
120 */
121 private ResourceType evaluateSource( URI source )
122 throws InvalidParameterValueException {
123
124 ResourceType st = null;
125 try {
126 XMLFragment xml = new XMLFragment();
127 xml.load( source.toURL() );
128 String ns = xml.getRootElement().getNamespaceURI();
129 String s = xml.getRootElement().getLocalName();
130 if ( "MD_Metadata".equals( s ) ) {
131 st = ResourceType.csw_profile;
132 } else if ( "Record".equals( s ) ) {
133 st = ResourceType.dublincore;
134 } else if ( "WMT_MS_Capabilities".equals( s ) ) {
135 st = ResourceType.service;
136 } else if ( "WFS_Capabilities".equals( s ) ) {
137 st = ResourceType.service;
138 } else if ( "WCS_Capabilities".equals( s ) ) {
139 st = ResourceType.service;
140 }
141 if ( "http://www.opengis.net/cat/csw".equals( ns ) ) {
142 st = ResourceType.catalogue;
143 }
144 } catch ( Exception e ) {
145 throw new InvalidParameterValueException( "source: " + source + " can not be parsed as XML" );
146 }
147
148 return st;
149 }
150
151 }