    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_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    }