Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2009 Jonas Ã…dahl. |
| 3 | * Copyright 2011-2013 Florian Schmaus |
| 4 | * |
| 5 | * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | package org.jivesoftware.smackx.provider; |
| 19 | |
| 20 | import java.io.IOException; |
| 21 | |
| 22 | import org.jivesoftware.smack.XMPPException; |
| 23 | import org.jivesoftware.smack.packet.PacketExtension; |
| 24 | import org.jivesoftware.smack.provider.PacketExtensionProvider; |
| 25 | import org.jivesoftware.smackx.entitycaps.packet.CapsExtension; |
| 26 | |
| 27 | import org.xmlpull.v1.XmlPullParser; |
| 28 | import org.xmlpull.v1.XmlPullParserException; |
| 29 | |
| 30 | public class CapsExtensionProvider implements PacketExtensionProvider { |
| 31 | private static final int MAX_DEPTH = 10; |
| 32 | |
| 33 | public PacketExtension parseExtension(XmlPullParser parser) throws XmlPullParserException, IOException, |
| 34 | XMPPException { |
| 35 | String hash = null; |
| 36 | String version = null; |
| 37 | String node = null; |
| 38 | int depth = 0; |
| 39 | while (true) { |
| 40 | if (parser.getEventType() == XmlPullParser.START_TAG && parser.getName().equalsIgnoreCase("c")) { |
| 41 | hash = parser.getAttributeValue(null, "hash"); |
| 42 | version = parser.getAttributeValue(null, "ver"); |
| 43 | node = parser.getAttributeValue(null, "node"); |
| 44 | } |
| 45 | |
| 46 | if (parser.getEventType() == XmlPullParser.END_TAG && parser.getName().equalsIgnoreCase("c")) { |
| 47 | break; |
| 48 | } else { |
| 49 | parser.next(); |
| 50 | } |
| 51 | |
| 52 | if (depth < MAX_DEPTH) { |
| 53 | depth++; |
| 54 | } else { |
| 55 | throw new XMPPException("Malformed caps element"); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | if (hash != null && version != null && node != null) { |
| 60 | return new CapsExtension(node, version, hash); |
| 61 | } else { |
| 62 | throw new XMPPException("Caps elment with missing attributes"); |
| 63 | } |
| 64 | } |
| 65 | } |