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;
023import org.jivesoftware.smackx.caps.EntityCapsManager;
024import org.jivesoftware.smackx.caps.packet.CapsExtension;
025import org.xmlpull.v1.XmlPullParser;
026import org.xmlpull.v1.XmlPullParserException;
027
028public class CapsExtensionProvider extends ExtensionElementProvider<CapsExtension> {
029
030    public CapsExtension parse(XmlPullParser parser, int initialDepth) throws XmlPullParserException, IOException,
031            SmackException {
032        String hash = null;
033        String version = null;
034        String node = null;
035        if (parser.getEventType() == XmlPullParser.START_TAG
036                && parser.getName().equalsIgnoreCase(EntityCapsManager.ELEMENT)) {
037            hash = parser.getAttributeValue(null, "hash");
038            version = parser.getAttributeValue(null, "ver");
039            node = parser.getAttributeValue(null, "node");
040        } else {
041            throw new SmackException("Malformed Caps element");
042        }
043
044        parser.next();
045
046        if (!(parser.getEventType() == XmlPullParser.END_TAG
047                && parser.getName().equalsIgnoreCase(EntityCapsManager.ELEMENT))) {
048            throw new SmackException("Malformed nested Caps element");
049        }
050
051        if (hash != null && version != null && node != null) {
052            return new CapsExtension(node, version, hash);
053        } else {
054            throw new SmackException("Caps elment with missing attributes. Attributes: hash=" + hash + " version="
055                            + version + " node=" + node);
056        }
057    }
058
059}