    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/framework/xml/NamespaceContext.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.framework.xml;
    037
    038    import java.net.URI;
    039    import java.util.HashMap;
    040    import java.util.Map;
    041    import java.util.Set;
    042
    043    import org.deegree.ogcbase.CommonNamespaces;
    044
    045    /**
    046     * Implementation of Jaxen's (http://jaxen.codehaus.org) <code>NamespaceContext</code> interface.
    047     * <p>
    048     * NOTE: This should be used everywhere inside deegree, don't use
    049     * <code>org.jaxen.SimpleNamespaceContext</code> -- this prevents unnecessary binding to Jaxen.
    050     *
    051     * @author <a href="mailto:schneider@lat-lon.de">Markus Schneider </a>
    052     * @author last edited by: $Author: mschneider $
    053     *
    054     * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
    055     */
    056    public class NamespaceContext implements org.jaxen.NamespaceContext {
    057
    058        // keys: prefices (String), values: namespaces (URI)
    059        private Map<String, URI> namespaceMap = new HashMap<String, URI>();
    060
    061        /**
    062         * Creates a new instance of <code>NamespaceContext</code> with only the prefix 'xmlns:' being
    063         * bound.
    064         */
    065        public NamespaceContext() {
    066            this.namespaceMap.put( CommonNamespaces.XMLNS_PREFIX, CommonNamespaces.XMLNS );
    067        }
    068
    069        /**
    070         * Creates a new instance of <code>NamespaceContext</code> that contains all the bindings from
    071         * the argument <code>NamespaceContext</code>.
    072         *
    073         * @param nsContext
    074         *            bindings to copy
    075         */
    076        public NamespaceContext( NamespaceContext nsContext ) {
    077            this.namespaceMap = new HashMap<String, URI>( nsContext.namespaceMap );
    078        }
    079
    080        /**
    081         * @return the namespace map of the context.
    082         */
    083        public Map<String, URI> getNamespaceMap() {
    084            return this.namespaceMap;
    085        }
    086
    087        /**
    088         * registers a new prefix with an assigned namespace URI
    089         *
    090         * @param prefix
    091         * @param namespace
    092         */
    093        public void addNamespace( String prefix, URI namespace ) {
    094            this.namespaceMap.put( prefix, namespace );
    095        }
    096
    097        /**
    098         * registeres all prexifes and assigned namespaces from another NamespaceContext. If a prefix
    099         * already exists in this NamespaceContext it will be ignored.
    100         *
    101         * @param nsc
    102         */
    103        public void addAll( NamespaceContext nsc ) {
    104            Map<String, URI> map = nsc.getNamespaceMap();
    105            Set<String> keys = map.keySet();
    106            for ( String key : keys ) {
    107                if ( this.namespaceMap.get( key ) == null ) {
    108                    this.namespaceMap.put( key, map.get( key ) );
    109                }
    110            }
    111        }
    112
    113        public String translateNamespacePrefixToUri( String prefix ) {
    114            URI namespaceURI = this.namespaceMap.get( prefix );
    115            return namespaceURI == null ? null : namespaceURI.toString();
    116        }
    117
    118        /**
    119         * @param prefix to get the namespace for
    120         * @return the URI (namespace) associated with the given prefix, or <code>null</code> if it was not found.
    121         */
    122        public URI getURI( String prefix ) {
    123            return this.namespaceMap.get( prefix );
    124        }
    125
    126        @Override
    127        public String toString() {
    128            return namespaceMap.toString();
    129        }
    130    }