001    /*
002     * JBoss DNA (http://www.jboss.org/dna)
003     * See the COPYRIGHT.txt file distributed with this work for information
004     * regarding copyright ownership.  Some portions may be licensed
005     * to Red Hat, Inc. under one or more contributor license agreements.
006     * See the AUTHORS.txt file in the distribution for a full listing of 
007     * individual contributors. 
008     *
009     * JBoss DNA is free software. Unless otherwise indicated, all code in JBoss DNA
010     * is licensed to you under the terms of the GNU Lesser General Public License as
011     * published by the Free Software Foundation; either version 2.1 of
012     * the License, or (at your option) any later version.
013     *
014     * JBoss DNA is distributed in the hope that it will be useful,
015     * but WITHOUT ANY WARRANTY; without even the implied warranty of
016     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
017     * Lesser General Public License for more details.
018     *
019     * You should have received a copy of the GNU Lesser General Public
020     * License along with this software; if not, write to the Free
021     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
022     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
023     */
024    package org.jboss.dna.common.xml;
025    
026    import java.util.HashMap;
027    import java.util.Iterator;
028    import java.util.Map;
029    import javax.xml.namespace.NamespaceContext;
030    
031    /**
032     * @author Randall Hauch
033     */
034    public class SimpleNamespaceContext implements NamespaceContext {
035    
036        private final Map<String, String> prefixToNamespace = new HashMap<String, String>();
037    
038        /**
039         * {@inheritDoc}
040         */
041        public String getNamespaceURI( String prefix ) {
042            return this.prefixToNamespace.get(prefix);
043        }
044    
045        /**
046         * {@inheritDoc}
047         */
048        public String getPrefix( String namespaceURI ) {
049            for (Map.Entry<String, String> entry : this.prefixToNamespace.entrySet()) {
050                if (entry.getValue().equals(namespaceURI)) return entry.getKey();
051            }
052            return null;
053        }
054    
055        public SimpleNamespaceContext setNamespace( String prefix,
056                                                    String namespaceUri ) {
057            this.prefixToNamespace.put(prefix, namespaceUri);
058            return this;
059        }
060    
061        /**
062         * {@inheritDoc}
063         */
064        public Iterator<String> getPrefixes( String namespaceURI ) {
065            return this.prefixToNamespace.keySet().iterator();
066        }
067    
068    }