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 }