001/**
002 *
003 * Copyright © 2003-2007 Jive Software, 2014-2019 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 */
017package org.jivesoftware.smack.roster.provider;
018
019import java.io.IOException;
020
021import org.jivesoftware.smack.packet.IQ;
022import org.jivesoftware.smack.packet.XmlEnvironment;
023import org.jivesoftware.smack.provider.IQProvider;
024import org.jivesoftware.smack.roster.packet.RosterPacket;
025import org.jivesoftware.smack.util.ParserUtils;
026import org.jivesoftware.smack.xml.XmlPullParser;
027import org.jivesoftware.smack.xml.XmlPullParserException;
028
029import org.jxmpp.jid.BareJid;
030import org.jxmpp.jid.impl.JidCreate;
031
032public class RosterPacketProvider extends IQProvider<RosterPacket> {
033
034    public static final RosterPacketProvider INSTANCE = new RosterPacketProvider();
035
036    @Override
037    public RosterPacket parse(XmlPullParser parser, int initialDepth, XmlEnvironment xmlEnvironment) throws XmlPullParserException, IOException {
038        RosterPacket roster = new RosterPacket();
039        String version = parser.getAttributeValue("", "ver");
040        roster.setVersion(version);
041
042        outerloop: while (true) {
043            XmlPullParser.Event eventType = parser.next();
044            switch (eventType) {
045            case START_ELEMENT:
046                String startTag = parser.getName();
047                switch (startTag) {
048                case "item":
049                    RosterPacket.Item item = parseItem(parser);
050                    roster.addRosterItem(item);
051                    break;
052                }
053                break;
054            case END_ELEMENT:
055                String endTag = parser.getName();
056                switch (endTag) {
057                case IQ.QUERY_ELEMENT:
058                    if (parser.getDepth() == initialDepth) {
059                        break outerloop;
060                    }
061                }
062                break;
063            default:
064                // Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
065                break;
066            }
067        }
068        return roster;
069    }
070
071    public static RosterPacket.Item parseItem(XmlPullParser parser) throws XmlPullParserException, IOException {
072        ParserUtils.assertAtStartTag(parser, RosterPacket.Item.ELEMENT);
073        final int initialDepth = parser.getDepth();
074        String jidString = parser.getAttributeValue("", "jid");
075        String itemName = parser.getAttributeValue("", "name");
076        BareJid jid = JidCreate.bareFrom(jidString);
077
078        // Create item.
079        RosterPacket.Item item = new RosterPacket.Item(jid, itemName);
080        // Set status.
081        String ask = parser.getAttributeValue("", "ask");
082        item.setSubscriptionPending("subscribe".equals(ask));
083        // Set type.
084        String subscription = parser.getAttributeValue("", "subscription");
085        RosterPacket.ItemType type = RosterPacket.ItemType.fromString(subscription);
086        item.setItemType(type);
087        // Set approval status.
088        boolean approved = ParserUtils.getBooleanAttribute(parser, "approved", false);
089        item.setApproved(approved);
090
091        outerloop: while (true) {
092            XmlPullParser.Event eventType = parser.next();
093            switch (eventType) {
094            case START_ELEMENT:
095                String name = parser.getName();
096                switch (name) {
097                case RosterPacket.Item.GROUP:
098                    final String groupName = parser.nextText();
099                    if (groupName != null && groupName.trim().length() > 0) {
100                        item.addGroupName(groupName);
101                    }
102                    break;
103                }
104                break;
105            case END_ELEMENT:
106                if (parser.getDepth() == initialDepth) {
107                    break outerloop;
108                }
109                break;
110            default:
111                // Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
112                break;
113            }
114        }
115        ParserUtils.assertAtEndTag(parser);
116        assert item != null;
117        return item;
118    }
119}