001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/security/owsrequestvalidator/wfs/AbstractWFSRequestValidator.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.wfs;
037
038 import java.io.IOException;
039 import java.io.StringReader;
040 import java.util.List;
041
042 import org.deegree.framework.log.ILogger;
043 import org.deegree.framework.log.LoggerFactory;
044 import org.deegree.framework.xml.XMLFragment;
045 import org.deegree.i18n.Messages;
046 import org.deegree.model.filterencoding.AbstractFilter;
047 import org.deegree.model.filterencoding.ComplexFilter;
048 import org.deegree.model.filterencoding.FilterConstructionException;
049 import org.deegree.model.filterencoding.Literal;
050 import org.deegree.model.filterencoding.LogicalOperation;
051 import org.deegree.model.filterencoding.Operation;
052 import org.deegree.model.filterencoding.OperationDefines;
053 import org.deegree.model.filterencoding.PropertyIsCOMPOperation;
054 import org.deegree.model.filterencoding.PropertyName;
055 import org.deegree.ogcwebservices.InvalidParameterValueException;
056 import org.deegree.security.owsproxy.Condition;
057 import org.deegree.security.owsproxy.OperationParameter;
058 import org.deegree.security.owsrequestvalidator.Policy;
059 import org.deegree.security.owsrequestvalidator.RequestValidator;
060 import org.xml.sax.SAXException;
061
062 /**
063 *
064 *
065 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth </a>
066 * @author last edited by: $Author: mschneider $
067 *
068 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
069 */
070 abstract class AbstractWFSRequestValidator extends RequestValidator {
071
072 private static final ILogger LOG = LoggerFactory.getLogger( AbstractWFSRequestValidator.class );
073
074 // known condition parameter
075 private static final String FEATURETYPES = "featureTypes";
076
077 private static final String PROPERTY_INSTANCEFILTER = "instanceFilter";
078
079 /**
080 * @param policy
081 */
082 public AbstractWFSRequestValidator( Policy policy ) {
083 super( policy );
084 }
085
086 /**
087 * validates if the requested info featuretypes are valid against the policy/condition. If the
088 * passed user <> null this is checked against the user- and rights-management system/repository
089 *
090 * @param condition
091 * @param featureTypes
092 * @throws InvalidParameterValueException
093 */
094 protected void validateFeatureTypes( Condition condition, String[] featureTypes )
095 throws InvalidParameterValueException {
096
097 OperationParameter op = condition.getOperationParameter( FEATURETYPES );
098
099 if ( op == null ) {
100 LOG.logWarning( "Did you forget to add a featureTypes parameter to the precondition?" );
101 return;
102 }
103
104 // version is valid because no restrictions are made
105 if ( op.isAny() )
106 return;
107
108 List<String> validLayers = op.getValues();
109 if ( op.isUserCoupled() ) {
110 userCoupled = true;
111 } else {
112 for ( int i = 0; i < featureTypes.length; i++ ) {
113 LOG.logDebug( "validating feature type: ", featureTypes[i] );
114 if ( !validLayers.contains( featureTypes[i] ) ) {
115 String s = Messages.getMessage( "OWSPROXY_NOT_ALLOWED_FEATURETYPE", "access", featureTypes[i] );
116 throw new InvalidParameterValueException( s );
117 }
118 }
119 }
120 }
121
122 /**
123 *
124 * @param operation
125 * @return the filter defined for the given operation or <code>null</code> if no such filter
126 * is defined.
127 * @throws IOException
128 * @throws SAXException
129 * @throws FilterConstructionException
130 */
131 protected ComplexFilter extractInstanceFilter( Operation operation )
132 throws SAXException, IOException, FilterConstructionException {
133 ComplexFilter filter = null;
134 if ( operation.getOperatorId() == OperationDefines.AND ) {
135 List<Operation> arguments = ( (LogicalOperation) operation ).getArguments();
136 for ( int i = 0; i < arguments.size(); i++ ) {
137 Operation op = arguments.get( i );
138 if ( op.getOperatorId() == OperationDefines.PROPERTYISEQUALTO ) {
139 PropertyName pn = (PropertyName) ( (PropertyIsCOMPOperation) op ).getFirstExpression();
140 if ( PROPERTY_INSTANCEFILTER.equals( pn.getValue().getAsString() ) ) {
141 Literal literal = (Literal) ( (PropertyIsCOMPOperation) op ).getSecondExpression();
142 StringReader sr = new StringReader( literal.getValue() );
143 XMLFragment xml = new XMLFragment( sr, XMLFragment.DEFAULT_URL );
144 filter = (ComplexFilter) AbstractFilter.buildFromDOM( xml.getRootElement(), false );
145 }
146 }
147 }
148 } else if ( operation.getOperatorId() == OperationDefines.PROPERTYISEQUALTO ) {
149 PropertyName pn = (PropertyName) ( (PropertyIsCOMPOperation) operation ).getFirstExpression();
150 if ( PROPERTY_INSTANCEFILTER.equals( pn.getValue().getAsString() ) ) {
151 Literal literal = (Literal) ( (PropertyIsCOMPOperation) operation ).getSecondExpression();
152 StringReader sr = new StringReader( literal.getValue() );
153 XMLFragment xml = new XMLFragment( sr, XMLFragment.DEFAULT_URL );
154 filter = (ComplexFilter) AbstractFilter.buildFromDOM( xml.getRootElement(), false );
155 }
156 }
157 return filter;
158 }
159 }