001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/security/owsrequestvalidator/csw/AbstractCSWRequestValidator.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.csw;
037    
038    import java.io.IOException;
039    import java.io.StringReader;
040    import java.util.List;
041    
042    import org.deegree.framework.xml.XMLFragment;
043    import org.deegree.model.filterencoding.AbstractFilter;
044    import org.deegree.model.filterencoding.ComplexFilter;
045    import org.deegree.model.filterencoding.FilterConstructionException;
046    import org.deegree.model.filterencoding.Literal;
047    import org.deegree.model.filterencoding.LogicalOperation;
048    import org.deegree.model.filterencoding.Operation;
049    import org.deegree.model.filterencoding.OperationDefines;
050    import org.deegree.model.filterencoding.PropertyIsCOMPOperation;
051    import org.deegree.model.filterencoding.PropertyName;
052    import org.deegree.security.owsproxy.Condition;
053    import org.deegree.security.owsrequestvalidator.Policy;
054    import org.deegree.security.owsrequestvalidator.RequestValidator;
055    import org.xml.sax.SAXException;
056    
057    /**
058     * Abstract super class for validating catalogue requests.
059     *
060     * @version $Revision: 18195 $
061     * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
062     * @author last edited by: $Author: mschneider $
063     *
064     * @version 1.0. $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
065     *
066     * @since 2.0
067     */
068    public abstract class AbstractCSWRequestValidator extends RequestValidator {
069    
070        private static final String PROPERTY_INSTANCEFILTER = "instanceFilter";
071    
072        /**
073         * initializes the AbstractCSWRequestValidator by passing an instance of the policy to be used by each concrete
074         * implementation
075         *
076         * @param policy
077         */
078        public AbstractCSWRequestValidator( Policy policy ) {
079            super( policy );
080        }
081    
082        /**
083         * validates the requested record type / outputTypeRec. If the current user is not allowed to request a record type
084         * (e.g. ISO 19115) an UnauthorizedException will be thrown.
085         *
086         * @param condition
087         * @param typeNames
088         */
089        public void validateRecordTypes( Condition condition, String[] typeNames ) {
090            throw new UnsupportedOperationException( "validateRecordTypes is not implemented yet" );
091        }
092    
093        protected ComplexFilter extractInstanceFilter( Operation operation, List<ComplexFilter> foundFilters )
094                                throws SAXException, IOException, FilterConstructionException {
095            ComplexFilter filter = null;
096            if ( operation.getOperatorId() == OperationDefines.AND || operation.getOperatorId() == OperationDefines.OR ) {
097                List<Operation> arguments = ( (LogicalOperation) operation ).getArguments();
098                for ( int i = 0; i < arguments.size(); i++ ) {
099                    Operation op = arguments.get( i );
100                    filter = extractInstanceFilter( op, foundFilters );
101                    if ( filter != null ) {
102                      //  foundFilters.add( filter );
103                    }
104                    /*
105                     * if ( op.getOperatorId() == OperationDefines.PROPERTYISEQUALTO ) { PropertyName pn = (PropertyName) (
106                     * (PropertyIsCOMPOperation) op ).getFirstExpression(); if ( PROPERTY_INSTANCEFILTER.equals(
107                     * pn.getValue().getAsString() ) ) { Literal literal = (Literal) ( (PropertyIsCOMPOperation) op
108                     * ).getSecondExpression(); StringReader sr = new StringReader( literal.getValue() ); XMLFragment xml =
109                     * new XMLFragment( sr, XMLFragment.DEFAULT_URL ); filter = (ComplexFilter) AbstractFilter.buildFromDOM(
110                     * xml.getRootElement() ); } }
111                     */
112                }
113            } else {
114                if ( operation.getOperatorId() == OperationDefines.PROPERTYISEQUALTO ) {
115                    PropertyName pn = (PropertyName) ( (PropertyIsCOMPOperation) operation ).getFirstExpression();
116                    if ( PROPERTY_INSTANCEFILTER.equals( pn.getValue().getAsString() ) ) {
117                        Literal literal = (Literal) ( (PropertyIsCOMPOperation) operation ).getSecondExpression();
118                        StringReader sr = new StringReader( literal.getValue() );
119                        XMLFragment xml = new XMLFragment( sr, XMLFragment.DEFAULT_URL );
120                        filter = (ComplexFilter) AbstractFilter.buildFromDOM( xml.getRootElement() );
121                        if ( filter != null ) {
122                            foundFilters.add( filter );
123                        }
124                    }
125                }
126            }
127            return filter;
128        }
129    
130    }