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+/**
+ * $RCSfile$
+ * $Revision: 7071 $
+ * $Date: 2007-02-12 08:59:05 +0800 (Mon, 12 Feb 2007) $
+ *
+ * Copyright 2003-2007 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.packet;
+
+import org.jivesoftware.smack.packet.IQ;
+import org.jivesoftware.smack.util.StringUtils;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+/**
+ * A DiscoverItems IQ packet, which is used by XMPP clients to request and receive items
+ * associated with XMPP entities.<p>
+ *
+ * The items could also be queried in order to discover if they contain items inside. Some items
+ * may be addressable by its JID and others may require to be addressed by a JID and a node name.
+ *
+ * @author Gaston Dombiak
+ */
+public class DiscoverItems extends IQ {
+
+ public static final String NAMESPACE = "http://jabber.org/protocol/disco#items";
+
+ private final List<Item> items = new CopyOnWriteArrayList<Item>();
+ private String node;
+
+ /**
+ * Adds a new item to the discovered information.
+ *
+ * @param item the discovered entity's item
+ */
+ public void addItem(Item item) {
+ synchronized (items) {
+ items.add(item);
+ }
+ }
+
+ /**
+ * Adds a collection of items to the discovered information. Does nothing if itemsToAdd is null
+ *
+ * @param itemsToAdd
+ */
+ public void addItems(Collection<Item> itemsToAdd) {
+ if (itemsToAdd == null) return;
+ for (Item i : itemsToAdd) {
+ addItem(i);
+ }
+ }
+
+ /**
+ * Returns the discovered items of the queried XMPP entity.
+ *
+ * @return an Iterator on the discovered entity's items
+ */
+ public Iterator<DiscoverItems.Item> getItems() {
+ synchronized (items) {
+ return Collections.unmodifiableList(items).iterator();
+ }
+ }
+
+ /**
+ * Returns the node attribute that supplements the 'jid' attribute. A node is merely
+ * something that is associated with a JID and for which the JID can provide information.<p>
+ *
+ * Node attributes SHOULD be used only when trying to provide or query information which
+ * is not directly addressable.
+ *
+ * @return the node attribute that supplements the 'jid' attribute
+ */
+ public String getNode() {
+ return node;
+ }
+
+ /**
+ * Sets the node attribute that supplements the 'jid' attribute. A node is merely
+ * something that is associated with a JID and for which the JID can provide information.<p>
+ *
+ * Node attributes SHOULD be used only when trying to provide or query information which
+ * is not directly addressable.
+ *
+ * @param node the node attribute that supplements the 'jid' attribute
+ */
+ public void setNode(String node) {
+ this.node = node;
+ }
+
+ public String getChildElementXML() {
+ StringBuilder buf = new StringBuilder();
+ buf.append("<query xmlns=\"" + NAMESPACE + "\"");
+ if (getNode() != null) {
+ buf.append(" node=\"");
+ buf.append(StringUtils.escapeForXML(getNode()));
+ buf.append("\"");
+ }
+ buf.append(">");
+ synchronized (items) {
+ for (Item item : items) {
+ buf.append(item.toXML());
+ }
+ }
+ buf.append("</query>");
+ return buf.toString();
+ }
+
+ /**
+ * An item is associated with an XMPP Entity, usually thought of a children of the parent
+ * entity and normally are addressable as a JID.<p>
+ *
+ * An item associated with an entity may not be addressable as a JID. In order to handle
+ * such items, Service Discovery uses an optional 'node' attribute that supplements the
+ * 'jid' attribute.
+ */
+ public static class Item {
+
+ /**
+ * Request to create or update the item.
+ */
+ public static final String UPDATE_ACTION = "update";
+
+ /**
+ * Request to remove the item.
+ */
+ public static final String REMOVE_ACTION = "remove";
+
+ private String entityID;
+ private String name;
+ private String node;
+ private String action;
+
+ /**
+ * Create a new Item associated with a given entity.
+ *
+ * @param entityID the id of the entity that contains the item
+ */
+ public Item(String entityID) {
+ this.entityID = entityID;
+ }
+
+ /**
+ * Returns the entity's ID.
+ *
+ * @return the entity's ID.
+ */
+ public String getEntityID() {
+ return entityID;
+ }
+
+ /**
+ * Returns the entity's name.
+ *
+ * @return the entity's name.
+ */
+ public String getName() {
+ return name;
+ }
+
+ /**
+ * Sets the entity's name.
+ *
+ * @param name the entity's name.
+ */
+ public void setName(String name) {
+ this.name = name;
+ }
+
+ /**
+ * Returns the node attribute that supplements the 'jid' attribute. A node is merely
+ * something that is associated with a JID and for which the JID can provide information.<p>
+ *
+ * Node attributes SHOULD be used only when trying to provide or query information which
+ * is not directly addressable.
+ *
+ * @return the node attribute that supplements the 'jid' attribute
+ */
+ public String getNode() {
+ return node;
+ }
+
+ /**
+ * Sets the node attribute that supplements the 'jid' attribute. A node is merely
+ * something that is associated with a JID and for which the JID can provide information.<p>
+ *
+ * Node attributes SHOULD be used only when trying to provide or query information which
+ * is not directly addressable.
+ *
+ * @param node the node attribute that supplements the 'jid' attribute
+ */
+ public void setNode(String node) {
+ this.node = node;
+ }
+
+ /**
+ * Returns the action that specifies the action being taken for this item. Possible action
+ * values are: "update" and "remove". Update should either create a new entry if the node
+ * and jid combination does not already exist, or simply update an existing entry. If
+ * "remove" is used as the action, the item should be removed from persistent storage.
+ *
+ * @return the action being taken for this item
+ */
+ public String getAction() {
+ return action;
+ }
+
+ /**
+ * Sets the action that specifies the action being taken for this item. Possible action
+ * values are: "update" and "remove". Update should either create a new entry if the node
+ * and jid combination does not already exist, or simply update an existing entry. If
+ * "remove" is used as the action, the item should be removed from persistent storage.
+ *
+ * @param action the action being taken for this item
+ */
+ public void setAction(String action) {
+ this.action = action;
+ }
+
+ public String toXML() {
+ StringBuilder buf = new StringBuilder();
+ buf.append("<item jid=\"").append(entityID).append("\"");
+ if (name != null) {
+ buf.append(" name=\"").append(StringUtils.escapeForXML(name)).append("\"");
+ }
+ if (node != null) {
+ buf.append(" node=\"").append(StringUtils.escapeForXML(node)).append("\"");
+ }
+ if (action != null) {
+ buf.append(" action=\"").append(StringUtils.escapeForXML(action)).append("\"");
+ }
+ buf.append("/>");
+ return buf.toString();
+ }
+ }
+}