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https://codeberg.org/Mercury-IM/Smack
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git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/branches/smack_3_3_0@13598 b35dd754-fafc-0310-a699-88a17e54d16e
508 lines
16 KiB
Java
508 lines
16 KiB
Java
/**
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* $RCSfile$
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* $Revision$
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* $Date$
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*
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* Copyright 2003-2007 Jive Software.
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*
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* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.packet;
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import org.jivesoftware.smack.packet.IQ;
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import org.jivesoftware.smack.util.StringUtils;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.concurrent.CopyOnWriteArrayList;
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/**
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* A DiscoverInfo IQ packet, which is used by XMPP clients to request and receive information
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* to/from other XMPP entities.<p>
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*
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* The received information may contain one or more identities of the requested XMPP entity, and
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* a list of supported features by the requested XMPP entity.
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*
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* @author Gaston Dombiak
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*/
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public class DiscoverInfo extends IQ {
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public static final String NAMESPACE = "http://jabber.org/protocol/disco#info";
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private final List<Feature> features = new CopyOnWriteArrayList<Feature>();
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private final List<Identity> identities = new CopyOnWriteArrayList<Identity>();
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private String node;
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public DiscoverInfo() {
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super();
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}
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/**
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* Copy constructor
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*
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* @param d
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*/
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public DiscoverInfo(DiscoverInfo d) {
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super(d);
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// Set node
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setNode(d.getNode());
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// Copy features
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synchronized (d.features) {
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for (Feature f : d.features) {
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addFeature(f);
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}
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}
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// Copy identities
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synchronized (d.identities) {
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for (Identity i : d.identities) {
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addIdentity(i);
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}
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}
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}
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/**
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* Adds a new feature to the discovered information.
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*
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* @param feature the discovered feature
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*/
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public void addFeature(String feature) {
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addFeature(new Feature(feature));
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}
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/**
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* Adds a collection of features to the packet. Does noting if featuresToAdd is null.
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*
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* @param featuresToAdd
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*/
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public void addFeatures(Collection<String> featuresToAdd) {
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if (featuresToAdd == null) return;
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for (String feature : featuresToAdd) {
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addFeature(feature);
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}
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}
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private void addFeature(Feature feature) {
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synchronized (features) {
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features.add(feature);
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}
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}
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/**
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* Returns the discovered features of an XMPP entity.
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*
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* @return an Iterator on the discovered features of an XMPP entity
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*/
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public Iterator<Feature> getFeatures() {
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synchronized (features) {
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return Collections.unmodifiableList(features).iterator();
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}
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}
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/**
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* Adds a new identity of the requested entity to the discovered information.
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*
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* @param identity the discovered entity's identity
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*/
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public void addIdentity(Identity identity) {
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synchronized (identities) {
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identities.add(identity);
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}
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}
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/**
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* Adds identities to the DiscoverInfo stanza
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*
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* @param identitiesToAdd
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*/
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public void addIdentities(Collection<Identity> identitiesToAdd) {
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if (identitiesToAdd == null) return;
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synchronized (identities) {
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identities.addAll(identitiesToAdd);
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}
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}
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/**
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* Returns the discovered identities of an XMPP entity.
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*
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* @return an Iterator on the discoveted identities
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*/
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public Iterator<Identity> getIdentities() {
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synchronized (identities) {
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return Collections.unmodifiableList(identities).iterator();
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}
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}
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/**
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* Returns the node attribute that supplements the 'jid' attribute. A node is merely
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* something that is associated with a JID and for which the JID can provide information.<p>
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*
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* Node attributes SHOULD be used only when trying to provide or query information which
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* is not directly addressable.
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*
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* @return the node attribute that supplements the 'jid' attribute
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*/
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public String getNode() {
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return node;
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}
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/**
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* Sets the node attribute that supplements the 'jid' attribute. A node is merely
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* something that is associated with a JID and for which the JID can provide information.<p>
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*
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* Node attributes SHOULD be used only when trying to provide or query information which
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* is not directly addressable.
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*
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* @param node the node attribute that supplements the 'jid' attribute
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*/
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public void setNode(String node) {
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this.node = node;
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}
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/**
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* Returns true if the specified feature is part of the discovered information.
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*
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* @param feature the feature to check
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* @return true if the requestes feature has been discovered
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*/
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public boolean containsFeature(String feature) {
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for (Iterator<Feature> it = getFeatures(); it.hasNext();) {
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if (feature.equals(it.next().getVar()))
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return true;
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}
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return false;
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}
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public String getChildElementXML() {
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StringBuilder buf = new StringBuilder();
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buf.append("<query xmlns=\"" + NAMESPACE + "\"");
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if (getNode() != null) {
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buf.append(" node=\"");
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buf.append(StringUtils.escapeForXML(getNode()));
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buf.append("\"");
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}
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buf.append(">");
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synchronized (identities) {
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for (Identity identity : identities) {
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buf.append(identity.toXML());
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}
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}
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synchronized (features) {
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for (Feature feature : features) {
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buf.append(feature.toXML());
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}
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}
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// Add packet extensions, if any are defined.
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buf.append(getExtensionsXML());
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buf.append("</query>");
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return buf.toString();
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}
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/**
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* Test if a DiscoverInfo response contains duplicate identities.
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*
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* @return true if duplicate identities where found, otherwise false
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*/
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public boolean containsDuplicateIdentities() {
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List<Identity> checkedIdentities = new LinkedList<Identity>();
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for (Identity i : identities) {
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for (Identity i2 : checkedIdentities) {
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if (i.equals(i2))
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return true;
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}
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checkedIdentities.add(i);
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}
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return false;
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}
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/**
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* Test if a DiscoverInfo response contains duplicate features.
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*
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* @return true if duplicate identities where found, otherwise false
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*/
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public boolean containsDuplicateFeatures() {
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List<Feature> checkedFeatures = new LinkedList<Feature>();
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for (Feature f : features) {
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for (Feature f2 : checkedFeatures) {
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if (f.equals(f2))
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return true;
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}
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checkedFeatures.add(f);
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}
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return false;
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}
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/**
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* Represents the identity of a given XMPP entity. An entity may have many identities but all
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* the identities SHOULD have the same name.<p>
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*
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* Refer to <a href="http://www.jabber.org/registrar/disco-categories.html">Jabber::Registrar</a>
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* in order to get the official registry of values for the <i>category</i> and <i>type</i>
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* attributes.
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*
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*/
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public static class Identity implements Comparable<Identity> {
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private String category;
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private String name;
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private String type;
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private String lang; // 'xml:lang;
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/**
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* Creates a new identity for an XMPP entity.
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*
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* @param category the entity's category.
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* @param name the entity's name.
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* @deprecated As per the spec, the type field is mandatory and the 3 argument constructor should be used instead.
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*/
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public Identity(String category, String name) {
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this.category = category;
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this.name = name;
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}
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/**
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* Creates a new identity for an XMPP entity.
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* 'category' and 'type' are required by
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* <a href="http://xmpp.org/extensions/xep-0030.html#schemas">XEP-30 XML Schemas</a>
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*
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* @param category the entity's category (required as per XEP-30).
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* @param name the entity's name.
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* @param type the entity's type (required as per XEP-30).
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*/
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public Identity(String category, String name, String type) {
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if ((category == null) || (type == null))
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throw new IllegalArgumentException("category and type cannot be null");
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this.category = category;
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this.name = name;
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this.type = type;
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}
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/**
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* Returns the entity's category. To get the official registry of values for the
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* 'category' attribute refer to <a href="http://www.jabber.org/registrar/disco-categories.html">Jabber::Registrar</a>
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*
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* @return the entity's category.
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*/
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public String getCategory() {
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return category;
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}
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/**
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* Returns the identity's name.
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*
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* @return the identity's name.
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*/
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public String getName() {
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return name;
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}
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/**
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* Returns the entity's type. To get the official registry of values for the
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* 'type' attribute refer to <a href="http://www.jabber.org/registrar/disco-categories.html">Jabber::Registrar</a>
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*
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* @return the entity's type.
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*/
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public String getType() {
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return type;
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}
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/**
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* Sets the entity's type. To get the official registry of values for the
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* 'type' attribute refer to <a href="http://www.jabber.org/registrar/disco-categories.html">Jabber::Registrar</a>
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*
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* @param type the identity's type.
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* @deprecated As per the spec, this field is mandatory and the 3 argument constructor should be used instead.
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*/
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public void setType(String type) {
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this.type = type;
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}
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/**
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* Sets the natural language (xml:lang) for this identity (optional)
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*
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* @param lang the xml:lang of this Identity
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*/
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public void setLanguage(String lang) {
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this.lang = lang;
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}
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/**
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* Returns the identities natural language if one is set
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*
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* @return the value of xml:lang of this Identity
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*/
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public String getLanguage() {
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return lang;
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}
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public String toXML() {
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StringBuilder buf = new StringBuilder();
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buf.append("<identity");
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// Check if this packet has 'lang' set and maybe append it to the resulting string
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if (lang != null)
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buf.append(" xml:lang=\"").append(StringUtils.escapeForXML(lang)).append("\"");
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// Category must always be set
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buf.append(" category=\"").append(StringUtils.escapeForXML(category)).append("\"");
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// Name must always be set
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buf.append(" name=\"").append(StringUtils.escapeForXML(name)).append("\"");
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// Check if this packet has 'type' set and maybe append it to the resulting string
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if (type != null) {
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buf.append(" type=\"").append(StringUtils.escapeForXML(type)).append("\"");
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}
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buf.append("/>");
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return buf.toString();
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}
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/**
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* Check equality for Identity for category, type, lang and name
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* in that order as defined by
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* <a href="http://xmpp.org/extensions/xep-0115.html#ver-proc">XEP-0015 5.4 Processing Method (Step 3.3)</a>
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*
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*/
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public boolean equals(Object obj) {
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if (obj == null)
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return false;
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if (obj == this)
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return true;
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if (obj.getClass() != getClass())
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return false;
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DiscoverInfo.Identity other = (DiscoverInfo.Identity) obj;
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if (!this.category.equals(other.category))
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return false;
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String otherLang = other.lang == null ? "" : other.lang;
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String thisLang = lang == null ? "" : lang;
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if (!otherLang.equals(thisLang))
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return false;
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// This safeguard can be removed once the deprecated constructor is removed.
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String otherType = other.type == null ? "" : other.type;
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String thisType = type == null ? "" : type;
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if (!otherType.equals(thisType))
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return false;
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String otherName = other.name == null ? "" : other.name;
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String thisName = name == null ? "" : other.name;
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if (!thisName.equals(otherName))
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return false;
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return true;
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}
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@Override
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public int hashCode() {
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int result = 1;
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result = 37 * result + category.hashCode();
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result = 37 * result + (lang == null ? 0 : lang.hashCode());
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result = 37 * result + (type == null ? 0 : type.hashCode());
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result = 37 * result + (name == null ? 0 : name.hashCode());
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return result;
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}
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/**
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* Compares this identity with another one. The comparison order is:
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* Category, Type, Lang. If all three are identical the other Identity is considered equal.
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* Name is not used for comparision, as defined by XEP-0115
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*
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* @param obj
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* @return
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*/
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public int compareTo(DiscoverInfo.Identity other) {
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String otherLang = other.lang == null ? "" : other.lang;
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String thisLang = lang == null ? "" : lang;
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// This can be removed once the deprecated constructor is removed.
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String otherType = other.type == null ? "" : other.type;
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String thisType = type == null ? "" : type;
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if (category.equals(other.category)) {
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if (thisType.equals(otherType)) {
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if (thisLang.equals(otherLang)) {
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// Don't compare on name, XEP-30 says that name SHOULD
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// be equals for all identities of an entity
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return 0;
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} else {
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return thisLang.compareTo(otherLang);
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}
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} else {
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return thisType.compareTo(otherType);
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}
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} else {
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return category.compareTo(other.category);
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}
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}
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}
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/**
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* Represents the features offered by the item. This information helps requestors determine
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* what actions are possible with regard to this item (registration, search, join, etc.)
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* as well as specific feature types of interest, if any (e.g., for the purpose of feature
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* negotiation).
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*/
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public static class Feature {
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private String variable;
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/**
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* Creates a new feature offered by an XMPP entity or item.
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*
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* @param variable the feature's variable.
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*/
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public Feature(String variable) {
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if (variable == null)
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throw new IllegalArgumentException("variable cannot be null");
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this.variable = variable;
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}
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/**
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* Returns the feature's variable.
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*
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* @return the feature's variable.
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*/
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public String getVar() {
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return variable;
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}
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public String toXML() {
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StringBuilder buf = new StringBuilder();
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buf.append("<feature var=\"").append(StringUtils.escapeForXML(variable)).append("\"/>");
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return buf.toString();
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}
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public boolean equals(Object obj) {
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if (obj == null)
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return false;
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if (obj == this)
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return true;
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if (obj.getClass() != getClass())
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return false;
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DiscoverInfo.Feature other = (DiscoverInfo.Feature) obj;
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return variable.equals(other.variable);
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}
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@Override
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public int hashCode() {
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return 37 * variable.hashCode();
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}
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}
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}
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