001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/ogcwebservices/csw/manager/HarvesterFactory.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2008 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstr. 19
030 53115 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042
043 ---------------------------------------------------------------------------*/
044 package org.deegree.ogcwebservices.csw.manager;
045
046 import java.net.URI;
047 import java.util.Map;
048
049 import org.deegree.framework.xml.XMLFragment;
050 import org.deegree.ogcwebservices.InvalidParameterValueException;
051 import org.deegree.ogcwebservices.csw.manager.HarvestRepository.ResourceType;
052
053 /**
054 * returns an concrete instance of
055 *
056 * @see org.deegree.ogcwebservices.csw.manager.AbstractHarvester that is responsible for performing
057 * a harvest request against a source type assigned to the request. To decide which concrete
058 * Harvester is required the resourceType and, if neccessary, source parameter of a harvest
059 * request will be examinded.
060 *
061 * @version $Revision: 9345 $
062 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
063 * @author last edited by: $Author: apoth $
064 *
065 * @version 1.0. $Revision: 9345 $, $Date: 2007-12-27 17:22:25 +0100 (Do, 27 Dez 2007) $
066 *
067 * @since 2.0
068 */
069 public class HarvesterFactory {
070
071 private Map<ResourceType, AbstractHarvester> availableHarvester = null;
072
073 /**
074 * list of available Harvester
075 *
076 * @param availableHarvester
077 */
078 HarvesterFactory( Map<ResourceType, AbstractHarvester> availableHarvester ) {
079 this.availableHarvester = availableHarvester;
080 }
081
082 /**
083 * returns an concrete instance of
084 *
085 * @see org.deegree.ogcwebservices.csw.manager.AbstractHarvester that is responsible for
086 * performing a harvest request against a resource type assigned to the request. If no
087 * Harvester can be found that can be used to haverst the source defined in a harvest
088 * request an
089 *
090 * @param request
091 * @return
092 */
093 AbstractHarvester findHarvester( Harvest request )
094 throws InvalidParameterValueException {
095 URI uri = request.getResourceType();
096 ResourceType st = null;
097 if ( uri == null ) {
098 st = evaluateSource( request.getSource() );
099 } else {
100 String s = uri.toASCIIString();
101 if ( s.equals( "csw:profile" ) ) {
102 st = ResourceType.csw_profile;
103 } else if ( s.equals( "service" ) ) {
104 st = ResourceType.service;
105 } else if ( s.equals( "FGDC" ) ) {
106 st = ResourceType.FGDC;
107 } else if ( s.equals( "dublincore" ) ) {
108 st = ResourceType.dublincore;
109 } else if ( s.equals( "catalogue" ) ) {
110 st = ResourceType.catalogue;
111 } else {
112 String ms = "requested resourceType:" + s + " is not supported by the CS-W";
113 throw new InvalidParameterValueException( getClass().getName(), ms );
114 }
115 }
116 return availableHarvester.get( st );
117 }
118
119 /**
120 * determines the type of a metadata resource by evaluation the root element returned when
121 * accessing it.
122 *
123 * @param source
124 * @return
125 * @throws InvalidParameterValueException
126 */
127 private ResourceType evaluateSource( URI source )
128 throws InvalidParameterValueException {
129
130 ResourceType st = null;
131 try {
132 XMLFragment xml = new XMLFragment();
133 xml.load( source.toURL() );
134 String ns = xml.getRootElement().getNamespaceURI();
135 String s = xml.getRootElement().getLocalName();
136 if ( "MD_Metadata".equals( s ) ) {
137 st = ResourceType.csw_profile;
138 } else if ( "Record".equals( s ) ) {
139 st = ResourceType.dublincore;
140 } else if ( "WMT_MS_Capabilities".equals( s ) ) {
141 st = ResourceType.service;
142 } else if ( "WFS_Capabilities".equals( s ) ) {
143 st = ResourceType.service;
144 } else if ( "WCS_Capabilities".equals( s ) ) {
145 st = ResourceType.service;
146 }
147 if ( "http://www.opengis.net/cat/csw".equals( ns ) ) {
148 st = ResourceType.catalogue;
149 }
150 } catch ( Exception e ) {
151 throw new InvalidParameterValueException( "source: " + source
152 + " can not be parsed as XML" );
153 }
154
155 return st;
156 }
157
158 }