/* * 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.vysper.xml.sax.impl; import java.util.Map; import java.util.Map.Entry; import java.util.Stack; import org.apache.vysper.xml.fragment.Namespaces; /** * Naive implementation, will be replaced in later stages of this change */ public class ParserNamespaceResolver { private Stack<Map<String, String>> elements = new Stack<Map<String, String>>(); public ParserNamespaceResolver() { } public void push(Map<String, String> elmXmlns) { elements.push(elmXmlns); } public void pop() { elements.pop(); } public String resolveUri(String prefix) { // check for the reserved xml namespace if (prefix.equals("xml")) { return Namespaces.XML; } else { // walk over the stack backwards for (int i = elements.size() - 1; i >= 0; i--) { Map<String, String> ns = elements.get(i); if (ns.containsKey(prefix)) { return ns.get(prefix); } } } // could not resolve URI return null; } public String resolvePrefix(String uri) { if (uri.equals(Namespaces.XML)) { return "xml"; } else { // walk over the stack backwards for (int i = elements.size() - 1; i >= 0; i--) { Map<String, String> ns = elements.get(i); for (Entry<String, String> entry : ns.entrySet()) { if (entry.getValue().equals(uri)) { return entry.getKey(); } } } } return null; } }