001    /*
002     * JBoss, Home of Professional Open Source.
003     * Copyright 2008, Red Hat Middleware LLC, and individual contributors
004     * as indicated by the @author tags. See the copyright.txt file in the
005     * distribution for a full listing of individual contributors. 
006     *
007     * This is free software; you can redistribute it and/or modify it
008     * under the terms of the GNU Lesser General Public License as
009     * published by the Free Software Foundation; either version 2.1 of
010     * the License, or (at your option) any later version.
011     *
012     * This software is distributed in the hope that it will be useful,
013     * but WITHOUT ANY WARRANTY; without even the implied warranty of
014     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015     * Lesser General Public License for more details.
016     *
017     * You should have received a copy of the GNU Lesser General Public
018     * License along with this software; if not, write to the Free
019     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021     */
022    package org.jboss.dna.graph.properties.basic;
023    
024    import net.jcip.annotations.Immutable;
025    import org.jboss.dna.graph.properties.NamespaceRegistry;
026    import org.jboss.dna.graph.properties.NamespaceRegistry.Namespace;
027    
028    /**
029     * @author Randall Hauch
030     */
031    @Immutable
032    public class BasicNamespace implements NamespaceRegistry.Namespace {
033        private final String prefix;
034        private final String namespaceUri;
035    
036        /**
037         * Create a namespace instance.
038         * 
039         * @param prefix the namespace prefix; may not be null (this is not checked)
040         * @param namespaceUri the namespace URI; may not be null (this is not checked)
041         */
042        public BasicNamespace( String prefix,
043                               String namespaceUri ) {
044            assert prefix != null;
045            assert namespaceUri != null;
046            this.prefix = prefix;
047            this.namespaceUri = namespaceUri;
048        }
049    
050        /**
051         * {@inheritDoc}
052         * 
053         * @see org.jboss.dna.graph.properties.NamespaceRegistry.Namespace#getNamespaceUri()
054         */
055        public String getNamespaceUri() {
056            return namespaceUri;
057        }
058    
059        /**
060         * {@inheritDoc}
061         * 
062         * @see org.jboss.dna.graph.properties.NamespaceRegistry.Namespace#getPrefix()
063         */
064        public String getPrefix() {
065            return prefix;
066        }
067    
068        /**
069         * {@inheritDoc}
070         * 
071         * @see java.lang.Object#hashCode()
072         */
073        @Override
074        public int hashCode() {
075            return namespaceUri.hashCode();
076        }
077    
078        /**
079         * {@inheritDoc}
080         * 
081         * @see java.lang.Object#equals(java.lang.Object)
082         */
083        @Override
084        public boolean equals( Object obj ) {
085            if (obj == this) return true;
086            if (obj instanceof Namespace) {
087                Namespace that = (Namespace)obj;
088                if (!this.namespaceUri.equals(that.getNamespaceUri())) return false;
089                // if (!this.prefix.equals(that.getPrefix())) return false;
090                return true;
091            }
092            return false;
093        }
094    
095        /**
096         * {@inheritDoc}
097         * 
098         * @see java.lang.Object#toString()
099         */
100        @Override
101        public String toString() {
102            return prefix + ":" + namespaceUri;
103        }
104    }