streaminitiationprovider.java

JBother是纯Java开发的Jabber(即时消息开源软件)客户端。支持群组聊天

/**
 * $RCSfile$
 * $Revision: 2407 $
 * $Date: 2004-11-02 17:37:00 -0600 (Tue, 02 Nov 2004) $
 *
 * Copyright 2003-2004 Jive Software.
 *
 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jivesoftware.smackx.provider;

import org.jivesoftware.smack.provider.IQProvider;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smackx.packet.DataForm;
import org.xmlpull.v1.XmlPullParser;
import org.jivesoftware.smackx.packet.*;

/**
 * Implementation of provider class for StreamInitiation objects.
 * It will parse XML code for <si> messages and return StreamInitiation object.
 *
 * @author Lukasz Wiechec
 */

public class StreamInitiationProvider implements IQProvider {

    /**
     * Parses this IQ Packet
     *@param parser the parser to use
     *@throws Exception when a parsing error has occurred
     */
    public IQ parseIQ(XmlPullParser parser) throws Exception {
        StreamInitiation si = new StreamInitiation();
        boolean done = false;
        String fileName = "";
        long fileSize = -1;
        String fileHash = null;
        String description = "";
        StreamInitiation.Feature feature = null;

        String id = parser.getAttributeValue("","id");

        while (!done) {
            int eventType = parser.next();
            String elementName = parser.getName();
            String namespace = parser.getNamespace();

            if (eventType == XmlPullParser.START_TAG) {
                if (elementName.equals("file")) {
                    try {
                        fileSize = Long.parseLong(parser.getAttributeValue("","size"));
                        fileName = parser.getAttributeValue("","name");
                        fileHash = parser.getAttributeValue("","hash");
                    }
                    catch(Exception ex) { }
                } else if (elementName.equals("desc")) {
                    int eType = parser.next();
                    if( eType == XmlPullParser.END_TAG ) {
                        description = "";
                    } else {
                        description = parser.getText();
                        // @todo there is probably better way to do it...
                        if(description.equals("<desc/>")) {
                            description="";
                        }
                    }
                } else if (elementName.equals("feature")) {
                } else if (elementName.equals("x") && namespace.equals("jabber:x:data")) {
                    DataFormProvider dataFormProvider = new DataFormProvider();
                    DataForm dataForm = (DataForm)dataFormProvider.parseExtension(parser);
                    feature = new StreamInitiation.Feature(dataForm.getType());
                    feature.setDataForm(dataForm);
                }
            } else if (eventType == XmlPullParser.END_TAG && elementName.equals("si")) {
                done = true;
            }
        }

        if( fileName.length() > 0 && fileSize > -1 ) {
            StreamInitiation.FileDetails fd = new StreamInitiation.FileDetails(fileName);
            fd.setFileSize(fileSize);
            fd.setDescription(description);
            fd.setHash(fileHash);
            si.setFileDetails(fd);
        }


        si.setFeature(feature);
        si.setSid(id);
        return si;

    }
}