001/**
002 *
003 * Copyright 2003-2005 Jive Software.
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.jingleold.provider;
018
019import java.io.IOException;
020
021import org.jivesoftware.smack.SmackException;
022import org.jivesoftware.smack.provider.ExtensionElementProvider;
023
024import org.jivesoftware.smackx.jingleold.media.PayloadType;
025import org.jivesoftware.smackx.jingleold.packet.JingleContentDescription;
026import org.jivesoftware.smackx.jingleold.packet.JingleContentDescription.JinglePayloadType;
027
028import org.xmlpull.v1.XmlPullParser;
029import org.xmlpull.v1.XmlPullParserException;
030
031/**
032 * Parser for a Jingle description.
033 *
034 * @author Alvaro Saurin
035 */
036public abstract class JingleContentDescriptionProvider extends ExtensionElementProvider<JingleContentDescription> {
037
038    /**
039     * Parse a iq/jingle/description/payload-type element.
040     *
041     * @param parser the input to parse
042     * @return a payload type element
043     */
044    protected JinglePayloadType parsePayload(final XmlPullParser parser) {
045        int ptId = 0;
046        String ptName;
047        int ptChannels = 0;
048
049        try {
050            ptId = Integer.parseInt(parser.getAttributeValue("", "id"));
051        } catch (Exception e) {
052        }
053
054        ptName = parser.getAttributeValue("", "name");
055
056        try {
057            ptChannels = Integer.parseInt(parser.getAttributeValue("", "channels"));
058        } catch (Exception e) {
059        }
060
061        return new JinglePayloadType(new PayloadType(ptId, ptName, ptChannels));
062    }
063
064    /**
065     * Parse a iq/jingle/description element.
066     *
067     * @param parser the input to parse
068     * @return a description element
069     * @throws IOException
070     * @throws XmlPullParserException
071     * @throws SmackException
072     */
073    @Override
074    public JingleContentDescription parse(XmlPullParser parser,
075                    int initialDepth) throws XmlPullParserException,
076                    IOException, SmackException {
077        boolean done = false;
078        JingleContentDescription desc = getInstance();
079
080        while (!done) {
081            int eventType = parser.next();
082            String name = parser.getName();
083
084            if (eventType == XmlPullParser.START_TAG) {
085                if (name.equals(JingleContentDescription.JinglePayloadType.NODENAME)) {
086                    desc.addJinglePayloadType(parsePayload(parser));
087                } else {
088                    throw new SmackException("Unknow element \"" + name + "\" in content.");
089                }
090            } else if (eventType == XmlPullParser.END_TAG) {
091                if (name.equals(JingleContentDescription.NODENAME)) {
092                    done = true;
093                }
094            }
095        }
096        return desc;
097    }
098
099    /**
100     * Return a new instance of this class. Subclasses must overwrite this
101     * method.
102     */
103    protected abstract JingleContentDescription getInstance();
104
105    /**
106     * Jingle audio.
107     */
108    public static class Audio extends JingleContentDescriptionProvider {
109
110        /**
111         * Parse an audio payload type.
112         */
113        @Override
114        public JinglePayloadType parsePayload(final XmlPullParser parser) {
115            JinglePayloadType pte = super.parsePayload(parser);
116            PayloadType.Audio pt = new PayloadType.Audio(pte.getPayloadType());
117            int ptClockRate = 0;
118
119            try {
120                ptClockRate = Integer.parseInt(parser.getAttributeValue("", "clockrate"));
121            } catch (Exception e) {
122            }
123            pt.setClockRate(ptClockRate);
124
125            return new JinglePayloadType.Audio(pt);
126        }
127
128        /**
129         * Get a new instance of this object.
130         */
131        @Override
132        protected JingleContentDescription getInstance() {
133            return new JingleContentDescription.Audio();
134        }
135    }
136}