001/** 002 * 003 * Copyright © 2009 Jonas Ådahl, 2011-2014 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.smackx.caps.provider; 018 019import java.io.IOException; 020 021import org.jivesoftware.smack.SmackException; 022import org.jivesoftware.smack.provider.ExtensionElementProvider; 023 024import org.jivesoftware.smackx.caps.EntityCapsManager; 025import org.jivesoftware.smackx.caps.packet.CapsExtension; 026 027import org.xmlpull.v1.XmlPullParser; 028import org.xmlpull.v1.XmlPullParserException; 029 030public class CapsExtensionProvider extends ExtensionElementProvider<CapsExtension> { 031 032 @Override 033 public CapsExtension parse(XmlPullParser parser, int initialDepth) throws XmlPullParserException, IOException, 034 SmackException { 035 String hash = null; 036 String version = null; 037 String node = null; 038 if (parser.getEventType() == XmlPullParser.START_TAG 039 && parser.getName().equalsIgnoreCase(EntityCapsManager.ELEMENT)) { 040 hash = parser.getAttributeValue(null, "hash"); 041 version = parser.getAttributeValue(null, "ver"); 042 node = parser.getAttributeValue(null, "node"); 043 } else { 044 throw new SmackException("Malformed Caps element"); 045 } 046 047 parser.next(); 048 049 if (!(parser.getEventType() == XmlPullParser.END_TAG 050 && parser.getName().equalsIgnoreCase(EntityCapsManager.ELEMENT))) { 051 throw new SmackException("Malformed nested Caps element"); 052 } 053 054 if (hash != null && version != null && node != null) { 055 return new CapsExtension(node, version, hash); 056 } else { 057 throw new SmackException("Caps element with missing attributes. Attributes: hash=" + hash + " version=" 058 + version + " node=" + node); 059 } 060 } 061 062}