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; 021import org.jxmpp.jid.Jid; 022 023 024/** 025 * Handle incoming requests to subscribe to our presence. 026 * 027 */ 028public interface SubscribeListener { 029 030 public enum SubscribeAnswer { 031 Approve, 032 Deny, 033 } 034 035 /** 036 * Handle incoming presence subscription requests. 037 * 038 * @param from the JID requesting the subscription. 039 * @param subscribeRequest the presence stanza used for the request. 040 * @return a answer to the request, or <code>null</code> 041 */ 042 public SubscribeAnswer processSubscribe(Jid from, Presence subscribeRequest); 043 044}