001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/security/owsrequestvalidator/wms/GetLegendGraphicResponseValidator.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.security.owsrequestvalidator.wms;
037
038 import org.deegree.framework.util.MimeTypeMapper;
039 import org.deegree.ogcwebservices.InvalidParameterValueException;
040 import org.deegree.security.drm.model.User;
041 import org.deegree.security.owsproxy.Request;
042 import org.deegree.security.owsrequestvalidator.Policy;
043 import org.deegree.security.owsrequestvalidator.ResponseValidator;
044
045 /**
046 *
047 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth </a>
048 * @author last edited by: $Author: mschneider $
049 *
050 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
051 */
052 class GetLegendGraphicResponseValidator extends ResponseValidator {
053
054 /**
055 * @param policy
056 */
057 public GetLegendGraphicResponseValidator( Policy policy ) {
058 super( policy );
059 }
060
061 /**
062 * validates the passed object as a response to a OWS request. The validity of the response may
063 * is assigned to specific user rights. If the passed user is <>null this will be evaluated.
064 * <br>
065 * the reponse may contain three valid kinds of objects:
066 * <ul>
067 * <li>a serialized image
068 * <li>a xml encoded exception
069 * <li>a svg-encoded vector image
070 * </ul>
071 * Each of these types can be identified by the mime-type of the response that is also passed to
072 * the method. <br>
073 * If something basic went wrong it is possible that not further specified kind of object is
074 * passed as response. In this case the method will throw an
075 * <tt>InvalidParameterValueException</tt> to avoid sending bad responses to the client.
076 *
077 * @param service
078 * service which produced the response (WMS, WFS ...)
079 * @param response
080 * @param mime
081 * mime-type of the response
082 * @param user
083 * @return the validated response or the response as given.
084 * @throws InvalidParameterValueException
085 */
086 @Override
087 public byte[] validateResponse( String service, byte[] response, String mime, User user )
088 throws InvalidParameterValueException {
089
090 Request req = policy.getRequest( service, "GetLegendGraphic" );
091 // request is valid because no restrictions are made
092 if ( req.isAny() || req.getPostConditions().isAny() ) {
093 return response;
094 }
095
096 //Condition condition = req.getPostConditions();
097
098 if ( MimeTypeMapper.isKnownImageType( mime ) ) {
099 response = validateImage( response, mime, user );
100 } else if ( MimeTypeMapper.isKnownOGCType( mime ) ) {
101 // if the mime-type isn't an image type but a known
102 // OGC mime-type it must be an XML document.
103 // probably it is an exception but it also could be
104 // a GML document
105 response = validateXML( response, mime, user );
106 } else if ( mime.equals( "text/xml" ) ) {
107 // if the mime-type isn't an image type but 'text/xml'
108 // it could be an exception
109 response = validateXML( response, mime, user );
110 } else {
111 throw new InvalidParameterValueException( UNKNOWNMIMETYPE + mime );
112 }
113
114 return response;
115 }
116
117 /**
118 * validates the passed object/image to be valid against the policy
119 *
120 * @param image
121 * @param mime
122 * @param user
123 * @return the image parameter.
124 */
125 private byte[] validateImage( byte[] image, String mime, User user ) {
126 // TODO
127 // define useful post-validation for images
128 // at the moment everything is valid
129 return image;
130 }
131
132 /**
133 * validates the passed object/xml to be valid against the policy
134 *
135 * @param xml
136 * @param mime
137 * @param user
138 * @return the xml parameter
139 */
140 private byte[] validateXML( byte[] xml, String mime, User user ) {
141 // TODO
142 // define useful post-validation for xml-documents
143 // at the moment everything is valid
144 return xml;
145 }
146 }