org.jivesoftware.smackx.pubsub.Node Maven / Gradle / Ivy
/**
*
* Copyright 2009 Robin Collier.
*
* 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.pubsub;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import org.jivesoftware.smack.SmackException.NoResponseException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.StanzaListener;
import org.jivesoftware.smack.XMPPException.XMPPErrorException;
import org.jivesoftware.smack.filter.FlexibleStanzaTypeFilter;
import org.jivesoftware.smack.filter.OrFilter;
import org.jivesoftware.smack.packet.ExtensionElement;
import org.jivesoftware.smack.packet.IQ.Type;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smackx.delay.DelayInformationManager;
import org.jivesoftware.smackx.disco.packet.DiscoverInfo;
import org.jivesoftware.smackx.pubsub.Affiliation.AffiliationNamespace;
import org.jivesoftware.smackx.pubsub.SubscriptionsExtension.SubscriptionsNamespace;
import org.jivesoftware.smackx.pubsub.listener.ItemDeleteListener;
import org.jivesoftware.smackx.pubsub.listener.ItemEventListener;
import org.jivesoftware.smackx.pubsub.listener.NodeConfigListener;
import org.jivesoftware.smackx.pubsub.packet.PubSub;
import org.jivesoftware.smackx.pubsub.packet.PubSubNamespace;
import org.jivesoftware.smackx.pubsub.util.NodeUtils;
import org.jivesoftware.smackx.shim.packet.Header;
import org.jivesoftware.smackx.shim.packet.HeadersExtension;
import org.jivesoftware.smackx.xdata.Form;
import org.jxmpp.jid.Jid;
import org.jxmpp.jid.impl.JidCreate;
import org.jxmpp.stringprep.XmppStringprepException;
public abstract class Node {
protected final PubSubManager pubSubManager;
protected final String id;
protected ConcurrentHashMap, StanzaListener> itemEventToListenerMap = new ConcurrentHashMap<>();
protected ConcurrentHashMap itemDeleteToListenerMap = new ConcurrentHashMap<>();
protected ConcurrentHashMap configEventToListenerMap = new ConcurrentHashMap<>();
/**
* Construct a node associated to the supplied connection with the specified
* node id.
*
* @param pubSubManager The PubSubManager for the connection the node is associated with
* @param nodeId The node id
*/
Node(PubSubManager pubSubManager, String nodeId) {
this.pubSubManager = pubSubManager;
id = nodeId;
}
/**
* Get the NodeId.
*
* @return the node id
*/
public String getId() {
return id;
}
/**
* Returns a configuration form, from which you can create an answer form to be submitted
* via the {@link #sendConfigurationForm(Form)}.
*
* @return the configuration form
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public ConfigureForm getNodeConfiguration() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
PubSub pubSub = createPubsubPacket(Type.get, new NodeExtension(
PubSubElementType.CONFIGURE_OWNER, getId()));
Stanza reply = sendPubsubPacket(pubSub);
return NodeUtils.getFormFromPacket(reply, PubSubElementType.CONFIGURE_OWNER);
}
/**
* Update the configuration with the contents of the new {@link Form}.
*
* @param submitForm
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public void sendConfigurationForm(Form submitForm) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
PubSub packet = createPubsubPacket(Type.set, new FormNode(FormNodeType.CONFIGURE_OWNER,
getId(), submitForm));
pubSubManager.getConnection().createStanzaCollectorAndSend(packet).nextResultOrThrow();
}
/**
* Discover node information in standard {@link DiscoverInfo} format.
*
* @return The discovery information about the node.
* @throws XMPPErrorException
* @throws NoResponseException if there was no response from the server.
* @throws NotConnectedException
* @throws InterruptedException
*/
public DiscoverInfo discoverInfo() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
DiscoverInfo info = new DiscoverInfo();
info.setTo(pubSubManager.getServiceJid());
info.setNode(getId());
return pubSubManager.getConnection().createStanzaCollectorAndSend(info).nextResultOrThrow();
}
/**
* Get the subscriptions currently associated with this node.
*
* @return List of {@link Subscription}
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*
*/
public List getSubscriptions() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
return getSubscriptions(null, null);
}
/**
* Get the subscriptions currently associated with this node.
*
* {@code additionalExtensions} can be used e.g. to add a "Result Set Management" extension.
* {@code returnedExtensions} will be filled with the stanza extensions found in the answer.
*
*
* @param additionalExtensions
* @param returnedExtensions a collection that will be filled with the returned packet
* extensions
* @return List of {@link Subscription}
* @throws NoResponseException
* @throws XMPPErrorException
* @throws NotConnectedException
* @throws InterruptedException
*/
public List getSubscriptions(List additionalExtensions, Collection returnedExtensions)
throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
return getSubscriptions(SubscriptionsNamespace.basic, additionalExtensions, returnedExtensions);
}
/**
* Get the subscriptions currently associated with this node as owner.
*
* @return List of {@link Subscription}
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
* @see #getSubscriptionsAsOwner(List, Collection)
* @since 4.1
*/
public List getSubscriptionsAsOwner() throws NoResponseException, XMPPErrorException,
NotConnectedException, InterruptedException {
return getSubscriptionsAsOwner(null, null);
}
/**
* Get the subscriptions currently associated with this node as owner.
*
* Unlike {@link #getSubscriptions(List, Collection)}, which only retrieves the subscriptions of the current entity
* ("user"), this method returns a list of all subscriptions. This requires the entity to have the sufficient
* privileges to manage subscriptions.
*
*
* {@code additionalExtensions} can be used e.g. to add a "Result Set Management" extension.
* {@code returnedExtensions} will be filled with the stanza extensions found in the answer.
*
*
* @param additionalExtensions
* @param returnedExtensions a collection that will be filled with the returned stanza extensions
* @return List of {@link Subscription}
* @throws NoResponseException
* @throws XMPPErrorException
* @throws NotConnectedException
* @throws InterruptedException
* @see XEP-60 § 8.8.1 -
* Retrieve Subscriptions List
* @since 4.1
*/
public List getSubscriptionsAsOwner(List additionalExtensions,
Collection returnedExtensions) throws NoResponseException, XMPPErrorException,
NotConnectedException, InterruptedException {
return getSubscriptions(SubscriptionsNamespace.owner, additionalExtensions, returnedExtensions);
}
private List getSubscriptions(SubscriptionsNamespace subscriptionsNamespace, List additionalExtensions,
Collection returnedExtensions)
throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
PubSubElementType pubSubElementType = subscriptionsNamespace.type;
PubSub pubSub = createPubsubPacket(Type.get, new NodeExtension(pubSubElementType, getId()));
if (additionalExtensions != null) {
for (ExtensionElement pe : additionalExtensions) {
pubSub.addExtension(pe);
}
}
PubSub reply = sendPubsubPacket(pubSub);
if (returnedExtensions != null) {
returnedExtensions.addAll(reply.getExtensions());
}
SubscriptionsExtension subElem = reply.getExtension(pubSubElementType);
return subElem.getSubscriptions();
}
/**
* Modify the subscriptions for this PubSub node as owner.
*
* Note that the subscriptions are _not_ checked against the existing subscriptions
* since these are not cached (and indeed could change asynchronously)
*
*
* @param changedSubs subscriptions that have changed
* @return null or a PubSub stanza with additional information on success.
* @throws NoResponseException
* @throws XMPPErrorException
* @throws NotConnectedException
* @throws InterruptedException
* @see XEP-60 § 8.8.2 Modify Subscriptions
* @since 4.3
*/
public PubSub modifySubscriptionsAsOwner(List changedSubs)
throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
PubSub pubSub = createPubsubPacket(Type.set,
new SubscriptionsExtension(SubscriptionsNamespace.owner, getId(), changedSubs));
return sendPubsubPacket(pubSub);
}
/**
* Get the affiliations of this node.
*
* @return List of {@link Affiliation}
* @throws NoResponseException
* @throws XMPPErrorException
* @throws NotConnectedException
* @throws InterruptedException
*/
public List getAffiliations() throws NoResponseException, XMPPErrorException,
NotConnectedException, InterruptedException {
return getAffiliations(null, null);
}
/**
* Get the affiliations of this node.
*
* {@code additionalExtensions} can be used e.g. to add a "Result Set Management" extension.
* {@code returnedExtensions} will be filled with the stanza extensions found in the answer.
*
*
* @param additionalExtensions additional {@code PacketExtensions} add to the request
* @param returnedExtensions a collection that will be filled with the returned packet
* extensions
* @return List of {@link Affiliation}
* @throws NoResponseException
* @throws XMPPErrorException
* @throws NotConnectedException
* @throws InterruptedException
*/
public List getAffiliations(List additionalExtensions, Collection returnedExtensions)
throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
return getAffiliations(AffiliationNamespace.basic, additionalExtensions, returnedExtensions);
}
/**
* Retrieve the affiliation list for this node as owner.
*
* @return list of entities whose affiliation is not 'none'.
* @throws NoResponseException
* @throws XMPPErrorException
* @throws NotConnectedException
* @throws InterruptedException
* @see #getAffiliations(List, Collection)
* @since 4.2
*/
public List getAffiliationsAsOwner()
throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
return getAffiliationsAsOwner(null, null);
}
/**
* Retrieve the affiliation list for this node as owner.
*
* Note that this is an optional PubSub feature ('pubsub#modify-affiliations').
*
*
* @param additionalExtensions optional additional extension elements add to the request.
* @param returnedExtensions an optional collection that will be filled with the returned
* extension elements.
* @return list of entities whose affiliation is not 'none'.
* @throws NoResponseException
* @throws XMPPErrorException
* @throws NotConnectedException
* @throws InterruptedException
* @see XEP-60 § 8.9.1 Retrieve Affiliations List
* @since 4.2
*/
public List getAffiliationsAsOwner(List additionalExtensions, Collection returnedExtensions)
throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
return getAffiliations(AffiliationNamespace.owner, additionalExtensions, returnedExtensions);
}
private List getAffiliations(AffiliationNamespace affiliationsNamespace, List additionalExtensions,
Collection returnedExtensions) throws NoResponseException, XMPPErrorException,
NotConnectedException, InterruptedException {
PubSubElementType pubSubElementType = affiliationsNamespace.type;
PubSub pubSub = createPubsubPacket(Type.get, new NodeExtension(pubSubElementType, getId()));
if (additionalExtensions != null) {
for (ExtensionElement pe : additionalExtensions) {
pubSub.addExtension(pe);
}
}
PubSub reply = sendPubsubPacket(pubSub);
if (returnedExtensions != null) {
returnedExtensions.addAll(reply.getExtensions());
}
AffiliationsExtension affilElem = reply.getExtension(pubSubElementType);
return affilElem.getAffiliations();
}
/**
* Modify the affiliations for this PubSub node as owner. The {@link Affiliation}s given must be created with the
* {@link Affiliation#Affiliation(org.jxmpp.jid.BareJid, Affiliation.Type)} constructor.
*
* Note that this is an optional PubSub feature ('pubsub#modify-affiliations').
*
*
* @param affiliations
* @return null or a PubSub stanza with additional information on success.
* @throws NoResponseException
* @throws XMPPErrorException
* @throws NotConnectedException
* @throws InterruptedException
* @see XEP-60 § 8.9.2 Modify Affiliation
* @since 4.2
*/
public PubSub modifyAffiliationAsOwner(List affiliations) throws NoResponseException,
XMPPErrorException, NotConnectedException, InterruptedException {
for (Affiliation affiliation : affiliations) {
if (affiliation.getPubSubNamespace() != PubSubNamespace.owner) {
throw new IllegalArgumentException("Must use Affiliation(BareJid, Type) affiliations");
}
}
PubSub pubSub = createPubsubPacket(Type.set, new AffiliationsExtension(AffiliationNamespace.owner, affiliations, getId()));
return sendPubsubPacket(pubSub);
}
/**
* The user subscribes to the node using the supplied jid. The
* bare jid portion of this one must match the jid for the connection.
*
* Please note that the {@link Subscription.State} should be checked
* on return since more actions may be required by the caller.
* {@link Subscription.State#pending} - The owner must approve the subscription
* request before messages will be received.
* {@link Subscription.State#unconfigured} - If the {@link Subscription#isConfigRequired()} is true,
* the caller must configure the subscription before messages will be received. If it is false
* the caller can configure it but is not required to do so.
* @param jid The jid to subscribe as.
* @return The subscription
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public Subscription subscribe(Jid jid) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
PubSub pubSub = createPubsubPacket(Type.set, new SubscribeExtension(jid, getId()));
PubSub reply = sendPubsubPacket(pubSub);
return reply.getExtension(PubSubElementType.SUBSCRIPTION);
}
/**
* The user subscribes to the node using the supplied jid. The
* bare jid portion of this one must match the jid for the connection.
*
* Please note that the {@link Subscription.State} should be checked
* on return since more actions may be required by the caller.
* {@link Subscription.State#pending} - The owner must approve the subscription
* request before messages will be received.
* {@link Subscription.State#unconfigured} - If the {@link Subscription#isConfigRequired()} is true,
* the caller must configure the subscription before messages will be received. If it is false
* the caller can configure it but is not required to do so.
*
* @param jidString The jid to subscribe as.
* @return The subscription
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
* @throws IllegalArgumentException if the provided string is not a valid JID.
* @deprecated use {@link #subscribe(Jid)} instead.
*/
@Deprecated
// TODO: Remove in Smack 4.5.
public Subscription subscribe(String jidString) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
Jid jid;
try {
jid = JidCreate.from(jidString);
} catch (XmppStringprepException e) {
throw new IllegalArgumentException(e);
}
return subscribe(jid);
}
/**
* The user subscribes to the node using the supplied jid and subscription
* options. The bare jid portion of this one must match the jid for the
* connection.
*
* Please note that the {@link Subscription.State} should be checked
* on return since more actions may be required by the caller.
* {@link Subscription.State#pending} - The owner must approve the subscription
* request before messages will be received.
* {@link Subscription.State#unconfigured} - If the {@link Subscription#isConfigRequired()} is true,
* the caller must configure the subscription before messages will be received. If it is false
* the caller can configure it but is not required to do so.
*
* @param jid The jid to subscribe as.
* @param subForm
*
* @return The subscription
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public Subscription subscribe(Jid jid, SubscribeForm subForm) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
PubSub request = createPubsubPacket(Type.set, new SubscribeExtension(jid, getId()));
request.addExtension(new FormNode(FormNodeType.OPTIONS, subForm));
PubSub reply = sendPubsubPacket(request);
return reply.getExtension(PubSubElementType.SUBSCRIPTION);
}
/**
* The user subscribes to the node using the supplied jid and subscription
* options. The bare jid portion of this one must match the jid for the
* connection.
*
* Please note that the {@link Subscription.State} should be checked
* on return since more actions may be required by the caller.
* {@link Subscription.State#pending} - The owner must approve the subscription
* request before messages will be received.
* {@link Subscription.State#unconfigured} - If the {@link Subscription#isConfigRequired()} is true,
* the caller must configure the subscription before messages will be received. If it is false
* the caller can configure it but is not required to do so.
*
* @param jidString The jid to subscribe as.
* @param subForm
*
* @return The subscription
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
* @throws IllegalArgumentException if the provided string is not a valid JID.
* @deprecated use {@link #subscribe(Jid, SubscribeForm)} instead.
*/
@Deprecated
// TODO: Remove in Smack 4.5.
public Subscription subscribe(String jidString, SubscribeForm subForm) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
Jid jid;
try {
jid = JidCreate.from(jidString);
} catch (XmppStringprepException e) {
throw new IllegalArgumentException(e);
}
return subscribe(jid, subForm);
}
/**
* Remove the subscription related to the specified JID. This will only
* work if there is only 1 subscription. If there are multiple subscriptions,
* use {@link #unsubscribe(String, String)}.
*
* @param jid The JID used to subscribe to the node
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*
*/
public void unsubscribe(String jid) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
unsubscribe(jid, null);
}
/**
* Remove the specific subscription related to the specified JID.
*
* @param jid The JID used to subscribe to the node
* @param subscriptionId The id of the subscription being removed
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public void unsubscribe(String jid, String subscriptionId) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
sendPubsubPacket(createPubsubPacket(Type.set, new UnsubscribeExtension(jid, getId(), subscriptionId)));
}
/**
* Returns a SubscribeForm for subscriptions, from which you can create an answer form to be submitted
* via the {@link #sendConfigurationForm(Form)}.
*
* @param jid
*
* @return A subscription options form
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public SubscribeForm getSubscriptionOptions(String jid) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
return getSubscriptionOptions(jid, null);
}
/**
* Get the options for configuring the specified subscription.
*
* @param jid JID the subscription is registered under
* @param subscriptionId The subscription id
*
* @return The subscription option form
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*
*/
public SubscribeForm getSubscriptionOptions(String jid, String subscriptionId) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
PubSub packet = sendPubsubPacket(createPubsubPacket(Type.get, new OptionsExtension(jid, getId(), subscriptionId)));
FormNode ext = packet.getExtension(PubSubElementType.OPTIONS);
return new SubscribeForm(ext.getForm());
}
/**
* Register a listener for item publication events. This
* listener will get called whenever an item is published to
* this node.
*
* @param listener The handler for the event
*/
@SuppressWarnings("unchecked")
public void addItemEventListener(@SuppressWarnings("rawtypes") ItemEventListener listener) {
StanzaListener conListener = new ItemEventTranslator(listener);
itemEventToListenerMap.put(listener, conListener);
pubSubManager.getConnection().addSyncStanzaListener(conListener, new EventContentFilter(EventElementType.items.toString(), "item"));
}
/**
* Unregister a listener for publication events.
*
* @param listener The handler to unregister
*/
public void removeItemEventListener(@SuppressWarnings("rawtypes") ItemEventListener listener) {
StanzaListener conListener = itemEventToListenerMap.remove(listener);
if (conListener != null)
pubSubManager.getConnection().removeSyncStanzaListener(conListener);
}
/**
* Register a listener for configuration events. This listener
* will get called whenever the node's configuration changes.
*
* @param listener The handler for the event
*/
public void addConfigurationListener(NodeConfigListener listener) {
StanzaListener conListener = new NodeConfigTranslator(listener);
configEventToListenerMap.put(listener, conListener);
pubSubManager.getConnection().addSyncStanzaListener(conListener, new EventContentFilter(EventElementType.configuration.toString()));
}
/**
* Unregister a listener for configuration events.
*
* @param listener The handler to unregister
*/
public void removeConfigurationListener(NodeConfigListener listener) {
StanzaListener conListener = configEventToListenerMap .remove(listener);
if (conListener != null)
pubSubManager.getConnection().removeSyncStanzaListener(conListener);
}
/**
* Register an listener for item delete events. This listener
* gets called whenever an item is deleted from the node.
*
* @param listener The handler for the event
*/
public void addItemDeleteListener(ItemDeleteListener listener) {
StanzaListener delListener = new ItemDeleteTranslator(listener);
itemDeleteToListenerMap.put(listener, delListener);
EventContentFilter deleteItem = new EventContentFilter(EventElementType.items.toString(), "retract");
EventContentFilter purge = new EventContentFilter(EventElementType.purge.toString());
// TODO: Use AsyncButOrdered (with Node as Key?)
pubSubManager.getConnection().addSyncStanzaListener(delListener, new OrFilter(deleteItem, purge));
}
/**
* Unregister a listener for item delete events.
*
* @param listener The handler to unregister
*/
public void removeItemDeleteListener(ItemDeleteListener listener) {
StanzaListener conListener = itemDeleteToListenerMap .remove(listener);
if (conListener != null)
pubSubManager.getConnection().removeSyncStanzaListener(conListener);
}
@Override
public String toString() {
return super.toString() + " " + getClass().getName() + " id: " + id;
}
protected PubSub createPubsubPacket(Type type, NodeExtension ext) {
return PubSub.createPubsubPacket(pubSubManager.getServiceJid(), type, ext);
}
protected PubSub sendPubsubPacket(PubSub packet) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
return pubSubManager.sendPubsubPacket(packet);
}
private static List getSubscriptionIds(Stanza packet) {
HeadersExtension headers = packet.getExtension("headers", "http://jabber.org/protocol/shim");
List values = null;
if (headers != null) {
values = new ArrayList<>(headers.getHeaders().size());
for (Header header : headers.getHeaders()) {
values.add(header.getValue());
}
}
return values;
}
/**
* This class translates low level item publication events into api level objects for
* user consumption.
*
* @author Robin Collier
*/
public static class ItemEventTranslator implements StanzaListener {
@SuppressWarnings("rawtypes")
private final ItemEventListener listener;
public ItemEventTranslator(@SuppressWarnings("rawtypes") ItemEventListener eventListener) {
listener = eventListener;
}
@Override
@SuppressWarnings({ "rawtypes", "unchecked" })
public void processStanza(Stanza packet) {
EventElement event = packet.getExtension("event", PubSubNamespace.event.getXmlns());
ItemsExtension itemsElem = (ItemsExtension) event.getEvent();
ItemPublishEvent eventItems = new ItemPublishEvent(itemsElem.getNode(), itemsElem.getItems(), getSubscriptionIds(packet), DelayInformationManager.getDelayTimestamp(packet));
// TODO: Use AsyncButOrdered (with Node as Key?)
listener.handlePublishedItems(eventItems);
}
}
/**
* This class translates low level item deletion events into api level objects for
* user consumption.
*
* @author Robin Collier
*/
public static class ItemDeleteTranslator implements StanzaListener {
private final ItemDeleteListener listener;
public ItemDeleteTranslator(ItemDeleteListener eventListener) {
listener = eventListener;
}
@Override
public void processStanza(Stanza packet) {
// CHECKSTYLE:OFF
EventElement event = packet.getExtension("event", PubSubNamespace.event.getXmlns());
List extList = event.getExtensions();
if (extList.get(0).getElementName().equals(PubSubElementType.PURGE_EVENT.getElementName())) {
listener.handlePurge();
}
else {
ItemsExtension itemsElem = (ItemsExtension)event.getEvent();
@SuppressWarnings("unchecked")
Collection pubItems = (Collection) itemsElem.getItems();
List items = new ArrayList<>(pubItems.size());
for (RetractItem item : pubItems) {
items.add(item.getId());
}
ItemDeleteEvent eventItems = new ItemDeleteEvent(itemsElem.getNode(), items, getSubscriptionIds(packet));
listener.handleDeletedItems(eventItems);
}
// CHECKSTYLE:ON
}
}
/**
* This class translates low level node configuration events into api level objects for
* user consumption.
*
* @author Robin Collier
*/
public static class NodeConfigTranslator implements StanzaListener {
private final NodeConfigListener listener;
public NodeConfigTranslator(NodeConfigListener eventListener) {
listener = eventListener;
}
@Override
public void processStanza(Stanza packet) {
EventElement event = packet.getExtension("event", PubSubNamespace.event.getXmlns());
ConfigurationEvent config = (ConfigurationEvent) event.getEvent();
// TODO: Use AsyncButOrdered (with Node as Key?)
listener.handleNodeConfiguration(config);
}
}
/**
* Filter for {@link StanzaListener} to filter out events not specific to the
* event type expected for this node.
*
* @author Robin Collier
*/
class EventContentFilter extends FlexibleStanzaTypeFilter {
private final String firstElement;
private final String secondElement;
private final boolean allowEmpty;
EventContentFilter(String elementName) {
this(elementName, null);
}
EventContentFilter(String firstLevelElement, String secondLevelElement) {
firstElement = firstLevelElement;
secondElement = secondLevelElement;
allowEmpty = firstElement.equals(EventElementType.items.toString())
&& "item".equals(secondLevelElement);
}
@Override
public boolean acceptSpecific(Message message) {
EventElement event = EventElement.from(message);
if (event == null)
return false;
NodeExtension embedEvent = event.getEvent();
if (embedEvent == null)
return false;
if (embedEvent.getElementName().equals(firstElement)) {
if (!embedEvent.getNode().equals(getId()))
return false;
if (secondElement == null)
return true;
if (embedEvent instanceof EmbeddedPacketExtension) {
List secondLevelList = ((EmbeddedPacketExtension) embedEvent).getExtensions();
// XEP-0060 allows no elements on second level for notifications. See schema or
// for example § 4.3:
// "although event notifications MUST include an empty