| /* |
| * 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.xmpp.protocol; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.vysper.xml.fragment.XMLElement; |
| import org.apache.vysper.xmpp.stanza.Stanza; |
| |
| /** |
| * basic facility to collect and query a set of namespace-based handlers |
| */ |
| public abstract class AbstractStanzaHandlerLookup { |
| protected List<HandlerDictionary> namespaceDictionaries = new ArrayList<HandlerDictionary>(); |
| |
| public void addDictionary(HandlerDictionary namespaceHandlerDictionary) { |
| namespaceDictionaries.add(namespaceHandlerDictionary); |
| } |
| |
| public abstract StanzaHandler getHandler(Stanza stanza); |
| |
| /** |
| * tries to find the handler by trying |
| * 1. value of xmlElement's XMLNS attribute, if unique |
| * 2. xmlElements namespace, if the element name has a namespace prefix |
| */ |
| protected StanzaHandler getHandlerForElement(Stanza stanza, XMLElement xmlElement) { |
| for(HandlerDictionary dictionary : namespaceDictionaries) { |
| StanzaHandler stanzaHandler = dictionary.get(stanza); |
| if(stanzaHandler != null) return stanzaHandler; |
| } |
| return null; |
| } |
| } |