/* * 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.modules.core.base.handler; import java.util.List; import org.apache.vysper.xml.fragment.XMLElement; import org.apache.vysper.xml.fragment.XMLElementVerifier; import org.apache.vysper.xmpp.server.ServerRuntimeContext; import org.apache.vysper.xmpp.server.SessionContext; import org.apache.vysper.xmpp.server.response.ServerErrorResponses; import org.apache.vysper.xmpp.stanza.PresenceStanza; import org.apache.vysper.xmpp.stanza.Stanza; import org.apache.vysper.xmpp.stanza.StanzaErrorCondition; import org.apache.vysper.xmpp.stanza.StanzaErrorType; import org.apache.vysper.xmpp.stanza.XMPPCoreStanza; /** * handling presence stanzas * * @author The Apache MINA Project (dev@mina.apache.org) */ public class DefaultPresenceHandler extends XMPPCoreStanzaHandler { public String getName() { return "presence"; } @Override protected boolean verifyType(Stanza stanza) { return PresenceStanza.isOfType(stanza); } protected boolean verifyInnerNamespace(Stanza stanza, String namespace) { XMLElementVerifier xmlElementVerifier = stanza.getVerifier(); if (!xmlElementVerifier.subElementsPresentAtLeast(1)) return false; List<XMLElement> innerElements = stanza.getInnerElements(); XMLElement firstInnerElement = innerElements.get(0); return firstInnerElement.getVerifier().namespacePresent(namespace); } @Override protected Stanza executeCore(XMPPCoreStanza coreStanza, ServerRuntimeContext serverRuntimeContext, boolean isOutboundStanza, SessionContext sessionContext) { PresenceStanza stanza = (PresenceStanza) coreStanza; return executePresenceLogic(stanza, serverRuntimeContext, sessionContext); } /** * must be overridden by specialized presence handlers */ protected Stanza executePresenceLogic(PresenceStanza stanza, ServerRuntimeContext serverRuntimeContext, SessionContext sessionContext) { // this is default behavior and must be replaced by overrider return ServerErrorResponses.getStanzaError(StanzaErrorCondition.FEATURE_NOT_IMPLEMENTED, stanza, StanzaErrorType.CANCEL, null, null, null); } }