| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.camel.builder.xml; |
| |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import javax.xml.namespace.NamespaceContext; |
| import javax.xml.xpath.XPathFactory; |
| |
| import org.apache.camel.spi.NamespaceAware; |
| import org.apache.camel.util.CastUtils; |
| |
| /** |
| * An implementation of {@link NamespaceContext} which uses a simple Map where |
| * the keys are the prefixes and the values are the URIs |
| * |
| * @version |
| */ |
| public class DefaultNamespaceContext implements NamespaceContext, NamespaceAware { |
| |
| private final Map<String, String> map; |
| private final NamespaceContext parent; |
| |
| public DefaultNamespaceContext() { |
| this(XPathFactory.newInstance()); |
| } |
| |
| public DefaultNamespaceContext(XPathFactory factory) { |
| this.parent = factory.newXPath().getNamespaceContext(); |
| this.map = new HashMap<String, String>(); |
| } |
| |
| public DefaultNamespaceContext(NamespaceContext parent, Map<String, String> map) { |
| this.parent = parent; |
| this.map = map; |
| } |
| |
| /** |
| * A helper method to make it easy to create newly populated instances |
| */ |
| public DefaultNamespaceContext add(String prefix, String uri) { |
| map.put(prefix, uri); |
| return this; |
| } |
| |
| public String getNamespaceURI(String prefix) { |
| String answer = map.get(prefix); |
| if (answer == null && parent != null) { |
| return parent.getNamespaceURI(prefix); |
| } |
| return answer; |
| } |
| |
| public String getPrefix(String namespaceURI) { |
| for (Iterator<Map.Entry<String, String>> iter = map.entrySet().iterator(); iter.hasNext();) { |
| Map.Entry<String, String> entry = iter.next(); |
| if (namespaceURI.equals(entry.getValue())) { |
| return (String) entry.getKey(); |
| } |
| } |
| if (parent != null) { |
| return parent.getPrefix(namespaceURI); |
| } |
| return null; |
| } |
| |
| public Iterator<String> getPrefixes(String namespaceURI) { |
| Set<String> set = new HashSet<String>(); |
| for (Iterator<Map.Entry<String, String>> iter = map.entrySet().iterator(); iter.hasNext();) { |
| Map.Entry<String, String> entry = iter.next(); |
| if (namespaceURI.equals(entry.getValue())) { |
| set.add(entry.getKey()); |
| } |
| } |
| if (parent != null) { |
| Iterator<String> iter = CastUtils.cast(parent.getPrefixes(namespaceURI)); |
| while (iter.hasNext()) { |
| set.add(iter.next()); |
| } |
| } |
| return set.iterator(); |
| } |
| |
| public void setNamespaces(Map<String, String> namespaces) { |
| map.putAll(namespaces); |
| } |
| } |