Java tutorial
/* * Jicofo, the Jitsi Conference Focus. * * Distributable under LGPL license. * See terms of license at gnu.org. */ package org.jitsi.jicofo.xmpp; import org.dom4j.*; import org.dom4j.io.*; import org.jivesoftware.smack.provider.*; import org.xmlpull.v1.*; import org.xmpp.packet.*; import java.io.*; /** * FIXME: copied from JVB and used also in Jigasi * * Provides functionality which aids the manipulation of * <tt>org.jivesoftware.smack.packet.IQ</tt> and <tt>org.xmpp.packet.IQ</tt> * instances. * * @author Lyubomir Marinov */ public final class IQUtils { /** * The <tt>XmlPullParserFactory</tt> instance which is to create * <tt>XmlPullParser</tt> instances for the purposes of * {@link #convert(org.xmpp.packet.IQ)}. Introduced as a shared instance in * order to avoid unnecessary allocations. */ private static XmlPullParserFactory xmlPullParserFactory; /** * Converts a specific <tt>org.jivesoftware.smack.packet.IQ</tt> instance * into a new <tt>org.xmpp.packet.iQ</tt> instance which represents the same * stanza. * * @param smackIQ the <tt>org.jivesoftware.smack.packet.IQ</tt> instance to * convert to a new <tt>org.xmpp.packet.IQ</tt> instance * @return a new <tt>org.xmpp.packet.IQ</tt> instance which represents the * same stanza as the specified <tt>smackIQ</tt> * @throws Exception if anything goes wrong during the conversion */ public static org.xmpp.packet.IQ convert(org.jivesoftware.smack.packet.IQ smackIQ) throws Exception { String xml = smackIQ.toXML(); Element element = null; if ((xml != null) && (xml.length() != 0)) { SAXReader saxReader = new SAXReader(); Document document = saxReader.read(new StringReader(xml)); element = document.getRootElement(); } org.xmpp.packet.IQ iq = new org.xmpp.packet.IQ(element); String from = smackIQ.getFrom(); if ((from != null) && (from.length() != 0)) iq.setFrom(new JID(from)); iq.setID(smackIQ.getPacketID()); String to = smackIQ.getTo(); if ((to != null) && (to.length() != 0)) iq.setTo(new JID(to)); iq.setType(convert(smackIQ.getType())); return iq; } /** * Converts a specific <tt>org.xmpp.packet.iQ</tt> instance into a new * <tt>org.jivesoftware.smack.packet.IQ</tt> instance which represents the * same stanza. * * @param iq the <tt>org.xmpp.packet.IQ</tt> instance to convert to a new * <tt>org.jivesoftware.smack.packet.IQ</tt> instance * @return a new <tt>org.jivesoftware.smack.packet.IQ</tt> instance which * represents the same stanza as the specified <tt>iq</tt> * @throws Exception if anything goes wrong during the conversion */ public static org.jivesoftware.smack.packet.IQ convert(org.xmpp.packet.IQ iq) throws Exception { Element element = iq.getChildElement(); IQProvider iqProvider = (IQProvider) ProviderManager.getInstance().getIQProvider(element.getName(), element.getNamespaceURI()); org.jivesoftware.smack.packet.IQ smackIQ = null; if (iqProvider != null) { XmlPullParserFactory xmlPullParserFactory; synchronized (IQUtils.class) { if (IQUtils.xmlPullParserFactory == null) { IQUtils.xmlPullParserFactory = XmlPullParserFactory.newInstance(); IQUtils.xmlPullParserFactory.setNamespaceAware(true); } xmlPullParserFactory = IQUtils.xmlPullParserFactory; } XmlPullParser parser = xmlPullParserFactory.newPullParser(); parser.setInput(new StringReader(iq.toXML())); int eventType = parser.next(); if (XmlPullParser.START_TAG == eventType) { String name = parser.getName(); if ("iq".equals(name)) { eventType = parser.next(); if (XmlPullParser.START_TAG == eventType) { smackIQ = iqProvider.parseIQ(parser); if (smackIQ != null) { eventType = parser.getEventType(); if (XmlPullParser.END_TAG != eventType) { throw new IllegalStateException( Integer.toString(eventType) + " != XmlPullParser.END_TAG"); } } } else { throw new IllegalStateException( Integer.toString(eventType) + " != XmlPullParser.START_TAG"); } } else throw new IllegalStateException(name + " != iq"); } else { throw new IllegalStateException(Integer.toString(eventType) + " != XmlPullParser.START_TAG"); } } if (smackIQ != null) { org.xmpp.packet.JID fromJID = iq.getFrom(); if (fromJID != null) smackIQ.setFrom(fromJID.toString()); smackIQ.setPacketID(iq.getID()); org.xmpp.packet.JID toJID = iq.getTo(); if (toJID != null) smackIQ.setTo(toJID.toString()); smackIQ.setType(convert(iq.getType())); } return smackIQ; } /*public IQ parse(String packetStr) { }*/ /** * Methods used for IQProvider testing. * @param iqStr * @param iqProvider * @return * @throws Exception */ public static org.jivesoftware.smack.packet.IQ parse(String iqStr, IQProvider iqProvider) throws Exception { org.jivesoftware.smack.packet.IQ smackIQ = null; if (iqProvider != null) { XmlPullParserFactory xmlPullParserFactory; synchronized (IQUtils.class) { if (IQUtils.xmlPullParserFactory == null) { IQUtils.xmlPullParserFactory = XmlPullParserFactory.newInstance(); IQUtils.xmlPullParserFactory.setNamespaceAware(true); } xmlPullParserFactory = IQUtils.xmlPullParserFactory; } XmlPullParser parser = xmlPullParserFactory.newPullParser(); parser.setInput(new StringReader(iqStr)); int eventType = parser.next(); if (XmlPullParser.START_TAG == eventType) { String name = parser.getName(); if ("iq".equals(name)) { String packetId = parser.getAttributeValue("", "id"); String from = parser.getAttributeValue("", "from"); String to = parser.getAttributeValue("", "to"); String type = parser.getAttributeValue("", "type"); eventType = parser.next(); if (XmlPullParser.START_TAG == eventType) { smackIQ = iqProvider.parseIQ(parser); if (smackIQ != null) { eventType = parser.getEventType(); if (XmlPullParser.END_TAG != eventType) { throw new IllegalStateException( Integer.toString(eventType) + " != XmlPullParser.END_TAG"); } smackIQ.setType(org.jivesoftware.smack.packet.IQ.Type.fromString(type)); smackIQ.setPacketID(packetId); smackIQ.setFrom(from); smackIQ.setTo(to); } } else { throw new IllegalStateException( Integer.toString(eventType) + " != XmlPullParser.START_TAG"); } } else throw new IllegalStateException(name + " != iq"); } else { throw new IllegalStateException(Integer.toString(eventType) + " != XmlPullParser.START_TAG"); } } return smackIQ; } /** * Converts an <tt>org.jivesoftware.smack.packet.IQ.Type</tt> value into an * <tt>org.xmpp.packet.IQ.Type</tt> value which represents the same IQ type. * * @param smackType the <tt>org.jivesoftware.smack.packet.IQ.Type</tt> value * to convert into an <tt>org.xmpp.packet.IQ.Type</tt> value * @return an <tt>org.xmpp.packet.IQ.Type</tt> value which represents the * same IQ type as the specified <tt>smackType</tt> */ public static org.xmpp.packet.IQ.Type convert(org.jivesoftware.smack.packet.IQ.Type smackType) { return org.xmpp.packet.IQ.Type.valueOf(smackType.toString()); } /** * Converts an <tt>org.xmpp.packet.IQ.Type</tt> value into an * <tt>org.jivesoftware.smack.packet.IQ.Type</tt> value which represents the * same IQ type. * * @param type the <tt>org.xmpp.packet.IQ.Type</tt> value to convert into an * <tt>org.jivesoftware.smack.packet.IQ.Type</tt> value * @return an <tt>org.jivesoftware.smack.packet.IQ.Type</tt> value which * represents the same IQ type as the specified <tt>type</tt> */ public static org.jivesoftware.smack.packet.IQ.Type convert(org.xmpp.packet.IQ.Type type) { return org.jivesoftware.smack.packet.IQ.Type.fromString(type.name()); } /** Prevents the initialization of new <tt>IQUtils</tt> instances. */ private IQUtils() { } }