001    /**
002     *
003     * Licensed to the Apache Software Foundation (ASF) under one or more
004     * contributor license agreements.  See the NOTICE file distributed with
005     * this work for additional information regarding copyright ownership.
006     * The ASF licenses this file to You under the Apache License, Version 2.0
007     * (the "License"); you may not use this file except in compliance with
008     * the License.  You may obtain a copy of the License at
009     *
010     * http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    package org.apache.camel.builder.xml;
019    
020    import java.util.Map;
021    import java.util.HashMap;
022    import java.util.Set;
023    
024    /**
025     * A helper class for creating namespaces which can then be used to create XPath expressions
026     *
027     * @version $Revision: 1.1 $
028     */
029    public class NamespaceBuilder {
030        private Map<String,String> namespaces = new HashMap<String, String>();
031    
032        public static NamespaceBuilder namespaceContext() {
033            return new NamespaceBuilder();
034        }
035    
036        public static NamespaceBuilder namespaceContext(String prefix, String uri) {
037            return new NamespaceBuilder().namespace(prefix, uri);
038        }
039    
040        public NamespaceBuilder namespace(String prefix, String uri) {
041            namespaces.put(prefix, uri);
042            return this;
043        }
044    
045        /**
046         * Creates a new XPath expression using the current namespaces
047         *
048         * @param xpath the XPath expression
049         * @return a new XPath expression
050         */
051        public XPathBuilder xpath(String xpath) {
052            XPathBuilder answer = XPathBuilder.xpath(xpath);
053            Set<Map.Entry<String,String>> entries = namespaces.entrySet();
054            for (Map.Entry<String, String> entry : entries) {
055              answer.namespace(entry.getKey(), entry.getValue());
056            }
057            return answer;
058        }
059    }