001/** 002 * 003 * Copyright 2015 Florian Schmaus 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018package org.jivesoftware.smack.roster; 019 020import org.jivesoftware.smack.packet.Presence; 021 022import org.jxmpp.jid.Jid; 023 024 025/** 026 * Handle incoming requests to subscribe to our presence. 027 * 028 */ 029public interface SubscribeListener { 030 031 public enum SubscribeAnswer { 032 Approve, 033 Deny, 034 } 035 036 /** 037 * Handle incoming presence subscription requests. 038 * 039 * @param from the JID requesting the subscription. 040 * @param subscribeRequest the presence stanza used for the request. 041 * @return a answer to the request, or <code>null</code> 042 */ 043 public SubscribeAnswer processSubscribe(Jid from, Presence subscribeRequest); 044 045}