mirror of
https://github.com/vanitasvitae/Smack.git
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127319a821
git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@11613 b35dd754-fafc-0310-a699-88a17e54d16e
525 lines
17 KiB
Java
525 lines
17 KiB
Java
/*
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* Created on 2009-07-09
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*/
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package org.jivesoftware.smackx.pubsub;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Iterator;
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import java.util.List;
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import java.util.concurrent.ConcurrentHashMap;
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import org.jivesoftware.smack.PacketListener;
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import org.jivesoftware.smack.Connection;
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import org.jivesoftware.smack.XMPPException;
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import org.jivesoftware.smack.filter.OrFilter;
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import org.jivesoftware.smack.filter.PacketFilter;
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import org.jivesoftware.smack.packet.Message;
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import org.jivesoftware.smack.packet.Packet;
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import org.jivesoftware.smack.packet.PacketExtension;
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import org.jivesoftware.smack.packet.IQ.Type;
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import org.jivesoftware.smackx.Form;
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import org.jivesoftware.smackx.packet.DelayInformation;
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import org.jivesoftware.smackx.packet.DiscoverInfo;
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import org.jivesoftware.smackx.packet.Header;
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import org.jivesoftware.smackx.packet.HeadersExtension;
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import org.jivesoftware.smackx.pubsub.listener.ItemDeleteListener;
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import org.jivesoftware.smackx.pubsub.listener.ItemEventListener;
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import org.jivesoftware.smackx.pubsub.listener.NodeConfigListener;
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import org.jivesoftware.smackx.pubsub.packet.PubSub;
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import org.jivesoftware.smackx.pubsub.packet.PubSubNamespace;
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import org.jivesoftware.smackx.pubsub.packet.SyncPacketSend;
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import org.jivesoftware.smackx.pubsub.util.NodeUtils;
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abstract public class Node
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{
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protected Connection con;
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protected String id;
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protected String to;
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protected ConcurrentHashMap<ItemEventListener, PacketListener> itemEventToListenerMap = new ConcurrentHashMap<ItemEventListener, PacketListener>();
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protected ConcurrentHashMap<ItemDeleteListener, PacketListener> itemDeleteToListenerMap = new ConcurrentHashMap<ItemDeleteListener, PacketListener>();
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protected ConcurrentHashMap<NodeConfigListener, PacketListener> configEventToListenerMap = new ConcurrentHashMap<NodeConfigListener, PacketListener>();
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/**
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* Construct a node associated to the supplied connection with the specified
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* node id.
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*
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* @param connection The connection the node is associated with
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* @param nodeName The node id
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*/
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Node(Connection connection, String nodeName)
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{
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con = connection;
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id = nodeName;
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}
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/**
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* Some XMPP servers may require a specific service to be addressed on the
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* server.
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*
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* For example, OpenFire requires the server to be prefixed by <b>pubsub</b>
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*/
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void setTo(String toAddress)
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{
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to = toAddress;
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}
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/**
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* Get the NodeId
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*
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* @return the node id
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*/
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public String getId()
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{
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return id;
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}
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/**
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* Returns a configuration form, from which you can create an answer form to be submitted
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* via the {@link #sendConfigurationForm(Form)}.
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*
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* @return the configuration form
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*/
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public ConfigureForm getNodeConfiguration()
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throws XMPPException
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{
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Packet reply = sendPubsubPacket(Type.GET, new NodeExtension(PubSubElementType.CONFIGURE_OWNER, getId()), PubSubNamespace.OWNER);
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return NodeUtils.getFormFromPacket(reply, PubSubElementType.CONFIGURE_OWNER);
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}
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/**
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* Update the configuration with the contents of the new {@link Form}
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*
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* @param submitForm
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*/
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public void sendConfigurationForm(Form submitForm)
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throws XMPPException
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{
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PubSub packet = createPubsubPacket(Type.SET, new FormNode(FormNodeType.CONFIGURE_OWNER, getId(), submitForm), PubSubNamespace.OWNER);
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SyncPacketSend.getReply(con, packet);
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}
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/**
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* Discover node information in standard {@link DiscoverInfo} format.
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*
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* @return The discovery information about the node.
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*
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* @throws XMPPException
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*/
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public DiscoverInfo discoverInfo()
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throws XMPPException
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{
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DiscoverInfo info = new DiscoverInfo();
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info.setTo(to);
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info.setNode(getId());
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return (DiscoverInfo)SyncPacketSend.getReply(con, info);
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}
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/**
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* Get the subscriptions currently associated with this node.
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*
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* @return List of {@link Subscription}
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*
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* @throws XMPPException
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*/
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public List<Subscription> getSubscriptions()
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throws XMPPException
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{
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PubSub reply = (PubSub)sendPubsubPacket(Type.GET, new NodeExtension(PubSubElementType.SUBSCRIPTIONS, getId()));
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SubscriptionsExtension subElem = (SubscriptionsExtension)reply.getExtension(PubSubElementType.SUBSCRIPTIONS);
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return subElem.getSubscriptions();
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}
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/**
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* The user subscribes to the node using the supplied jid. The
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* bare jid portion of this one must match the jid for the connection.
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*
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* Please note that the {@link Subscription.State} should be checked
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* on return since more actions may be required by the caller.
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* {@link Subscription.State#pending} - The owner must approve the subscription
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* request before messages will be received.
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* {@link Subscription.State#unconfigured} - If the {@link Subscription#isConfigRequired()} is true,
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* the caller must configure the subscription before messages will be received. If it is false
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* the caller can configure it but is not required to do so.
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* @param jid The jid to subscribe as.
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* @return The subscription
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* @exception XMPPException
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*/
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public Subscription subscribe(String jid)
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throws XMPPException
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{
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PubSub reply = (PubSub)sendPubsubPacket(Type.SET, new SubscribeExtension(jid, getId()));
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return (Subscription)reply.getExtension(PubSubElementType.SUBSCRIPTION);
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}
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/**
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* The user subscribes to the node using the supplied jid and subscription
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* options. The bare jid portion of this one must match the jid for the
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* connection.
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*
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* Please note that the {@link Subscription.State} should be checked
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* on return since more actions may be required by the caller.
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* {@link Subscription.State#pending} - The owner must approve the subscription
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* request before messages will be received.
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* {@link Subscription.State#unconfigured} - If the {@link Subscription#isConfigRequired()} is true,
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* the caller must configure the subscription before messages will be received. If it is false
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* the caller can configure it but is not required to do so.
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* @param jid The jid to subscribe as.
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* @return The subscription
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* @exception XMPPException
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*/
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public Subscription subscribe(String jid, SubscribeForm subForm)
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throws XMPPException
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{
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PubSub request = createPubsubPacket(Type.SET, new SubscribeExtension(jid, getId()));
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request.addExtension(new FormNode(FormNodeType.OPTIONS, subForm));
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PubSub reply = (PubSub)PubSubManager.sendPubsubPacket(con, jid, Type.SET, request);
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return (Subscription)reply.getExtension(PubSubElementType.SUBSCRIPTION);
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}
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/**
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* Remove the subscription related to the specified JID. This will only
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* work if there is only 1 subscription. If there are multiple subscriptions,
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* use {@link #unsubscribe(String, String)}.
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*
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* @param jid The JID used to subscribe to the node
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*
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* @throws XMPPException
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*/
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public void unsubscribe(String jid)
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throws XMPPException
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{
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unsubscribe(jid, null);
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}
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/**
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* Remove the specific subscription related to the specified JID.
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*
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* @param jid The JID used to subscribe to the node
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* @param subscriptionId The id of the subscription being removed
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*
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* @throws XMPPException
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*/
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public void unsubscribe(String jid, String subscriptionId)
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throws XMPPException
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{
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sendPubsubPacket(Type.SET, new UnsubscribeExtension(jid, getId(), subscriptionId));
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}
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/**
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* Returns a SubscribeForm for subscriptions, from which you can create an answer form to be submitted
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* via the {@link #sendConfigurationForm(Form)}.
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*
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* @return A subscription options form
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*
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* @throws XMPPException
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*/
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public SubscribeForm getSubscriptionOptions(String jid)
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throws XMPPException
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{
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return getSubscriptionOptions(jid, null);
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}
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/**
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* Get the options for configuring the specified subscription.
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*
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* @param jid JID the subscription is registered under
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* @param subscriptionId The subscription id
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*
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* @return The subscription option form
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*
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* @throws XMPPException
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*/
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public SubscribeForm getSubscriptionOptions(String jid, String subscriptionId)
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throws XMPPException
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{
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PubSub packet = (PubSub)sendPubsubPacket(Type.GET, new OptionsExtension(jid, getId(), subscriptionId));
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FormNode ext = (FormNode)packet.getExtension(PubSubElementType.OPTIONS);
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return new SubscribeForm(ext.getForm());
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}
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/**
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* Register a listener for item publication events. This
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* listener will get called whenever an item is published to
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* this node.
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*
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* @param listener The handler for the event
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*/
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public void addItemEventListener(ItemEventListener listener)
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{
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PacketListener conListener = new ItemEventTranslator(listener);
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itemEventToListenerMap.put(listener, conListener);
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con.addPacketListener(conListener, new EventContentFilter(EventElementType.items.toString(), "item"));
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}
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/**
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* Unregister a listener for publication events.
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*
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* @param listener The handler to unregister
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*/
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public void removeItemEventListener(ItemEventListener listener)
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{
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PacketListener conListener = itemEventToListenerMap.remove(listener);
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if (conListener != null)
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con.removePacketListener(conListener);
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}
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/**
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* Register a listener for configuration events. This listener
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* will get called whenever the node's configuration changes.
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*
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* @param listener The handler for the event
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*/
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public void addConfigurationListener(NodeConfigListener listener)
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{
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PacketListener conListener = new NodeConfigTranslator(listener);
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configEventToListenerMap.put(listener, conListener);
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con.addPacketListener(conListener, new EventContentFilter(EventElementType.configuration.toString()));
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}
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/**
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* Unregister a listener for configuration events.
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*
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* @param listener The handler to unregister
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*/
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public void removeConfigurationListener(NodeConfigListener listener)
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{
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PacketListener conListener = configEventToListenerMap .remove(listener);
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if (conListener != null)
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con.removePacketListener(conListener);
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}
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/**
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* Register an listener for item delete events. This listener
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* gets called whenever an item is deleted from the node.
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*
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* @param listener The handler for the event
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*/
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public void addItemDeleteListener(ItemDeleteListener listener)
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{
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PacketListener delListener = new ItemDeleteTranslator(listener);
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itemDeleteToListenerMap.put(listener, delListener);
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EventContentFilter deleteItem = new EventContentFilter(EventElementType.items.toString(), "retract");
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EventContentFilter purge = new EventContentFilter(EventElementType.purge.toString());
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con.addPacketListener(delListener, new OrFilter(deleteItem, purge));
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}
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/**
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* Unregister a listener for item delete events.
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*
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* @param listener The handler to unregister
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*/
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public void removeItemDeleteListener(ItemDeleteListener listener)
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{
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PacketListener conListener = itemDeleteToListenerMap .remove(listener);
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if (conListener != null)
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con.removePacketListener(conListener);
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}
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@Override
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public String toString()
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{
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return super.toString() + " " + getClass().getName() + " id: " + id;
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}
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protected PubSub createPubsubPacket(Type type, PacketExtension ext)
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{
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return createPubsubPacket(type, ext, null);
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}
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protected PubSub createPubsubPacket(Type type, PacketExtension ext, PubSubNamespace ns)
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{
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return PubSubManager.createPubsubPacket(to, type, ext, ns);
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}
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protected Packet sendPubsubPacket(Type type, NodeExtension ext)
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throws XMPPException
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{
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return PubSubManager.sendPubsubPacket(con, to, type, ext);
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}
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protected Packet sendPubsubPacket(Type type, NodeExtension ext, PubSubNamespace ns)
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throws XMPPException
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{
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return PubSubManager.sendPubsubPacket(con, to, type, ext, ns);
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}
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private static List<String> getSubscriptionIds(Packet packet)
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{
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HeadersExtension headers = (HeadersExtension)packet.getExtension("headers", "http://jabber.org/protocol/shim");
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List<String> values = null;
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if (headers != null)
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{
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values = new ArrayList<String>(headers.getHeaders().size());
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for (Header header : headers.getHeaders())
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{
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values.add(header.getValue());
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}
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}
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return values;
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}
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/**
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* This class translates low level item publication events into api level objects for
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* user consumption.
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*
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* @author Robin Collier
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*/
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public class ItemEventTranslator implements PacketListener
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{
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private ItemEventListener listener;
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public ItemEventTranslator(ItemEventListener eventListener)
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{
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listener = eventListener;
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}
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public void processPacket(Packet packet)
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{
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EventElement event = (EventElement)packet.getExtension("event", PubSubNamespace.EVENT.getXmlns());
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ItemsExtension itemsElem = (ItemsExtension)event.getEvent();
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DelayInformation delay = (DelayInformation)packet.getExtension("delay", "urn:xmpp:delay");
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// If there was no delay based on XEP-0203, then try XEP-0091 for backward compatibility
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if (delay == null)
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{
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delay = (DelayInformation)packet.getExtension("x", "jabber:x:delay");
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}
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ItemPublishEvent eventItems = new ItemPublishEvent(itemsElem.getNode(), (List<Item>)itemsElem.getItems(), getSubscriptionIds(packet), (delay == null ? null : delay.getStamp()));
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listener.handlePublishedItems(eventItems);
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}
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}
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/**
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* This class translates low level item deletion events into api level objects for
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* user consumption.
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*
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* @author Robin Collier
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*/
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public class ItemDeleteTranslator implements PacketListener
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{
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private ItemDeleteListener listener;
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public ItemDeleteTranslator(ItemDeleteListener eventListener)
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{
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listener = eventListener;
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}
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public void processPacket(Packet packet)
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{
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EventElement event = (EventElement)packet.getExtension("event", PubSubNamespace.EVENT.getXmlns());
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List<PacketExtension> extList = event.getExtensions();
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if (extList.get(0).getElementName().equals(PubSubElementType.PURGE_EVENT.getElementName()))
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{
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listener.handlePurge();
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}
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else
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{
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ItemsExtension itemsElem = (ItemsExtension)event.getEvent();
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Collection<? extends PacketExtension> pubItems = itemsElem.getItems();
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Iterator<RetractItem> it = (Iterator<RetractItem>)pubItems.iterator();
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List<String> items = new ArrayList<String>(pubItems.size());
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while (it.hasNext())
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{
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RetractItem item = it.next();
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items.add(item.getId());
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}
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ItemDeleteEvent eventItems = new ItemDeleteEvent(itemsElem.getNode(), items, getSubscriptionIds(packet));
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listener.handleDeletedItems(eventItems);
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}
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}
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}
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/**
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* This class translates low level node configuration events into api level objects for
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* user consumption.
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*
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* @author Robin Collier
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*/
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public class NodeConfigTranslator implements PacketListener
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{
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private NodeConfigListener listener;
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public NodeConfigTranslator(NodeConfigListener eventListener)
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{
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listener = eventListener;
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}
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public void processPacket(Packet packet)
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{
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EventElement event = (EventElement)packet.getExtension("event", PubSubNamespace.EVENT.getXmlns());
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ConfigurationEvent config = (ConfigurationEvent)event.getEvent();
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listener.handleNodeConfiguration(config);
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}
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}
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/**
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* Filter for {@link PacketListener} to filter out events not specific to the
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* event type expected for this node.
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*
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* @author Robin Collier
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*/
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class EventContentFilter implements PacketFilter
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{
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private String firstElement;
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private String secondElement;
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EventContentFilter(String elementName)
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{
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firstElement = elementName;
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}
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EventContentFilter(String firstLevelEelement, String secondLevelElement)
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{
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firstElement = firstLevelEelement;
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secondElement = secondLevelElement;
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}
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public boolean accept(Packet packet)
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{
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if (!(packet instanceof Message))
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return false;
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EventElement event = (EventElement)packet.getExtension("event", PubSubNamespace.EVENT.getXmlns());
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if (event == null)
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return false;
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NodeExtension embedEvent = event.getEvent();
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if (embedEvent == null)
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return false;
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if (embedEvent.getElementName().equals(firstElement))
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{
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if (!embedEvent.getNode().equals(getId()))
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return false;
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if (secondElement == null)
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return true;
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if (embedEvent instanceof EmbeddedPacketExtension)
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{
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List<PacketExtension> secondLevelList = ((EmbeddedPacketExtension)embedEvent).getExtensions();
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if (secondLevelList.size() > 0 && secondLevelList.get(0).getElementName().equals(secondElement))
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return true;
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}
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}
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return false;
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}
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}
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}
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