552 lines
18 KiB
Java
552 lines
18 KiB
Java
/**
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*
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* Copyright 2003-2007 Jive Software.
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*
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* 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.disco.packet;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Set;
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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 org.jivesoftware.smack.util.TypedCloneable;
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import org.jivesoftware.smack.util.XmlStringBuilder;
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import org.jxmpp.util.XmppStringUtils;
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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 implements TypedCloneable<DiscoverInfo> {
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public static final String ELEMENT = QUERY_ELEMENT;
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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 LinkedList<>();
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private final Set<Feature> featuresSet = new HashSet<>();
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private final List<Identity> identities = new LinkedList<>();
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private final Set<String> identitiesSet = new HashSet<>();
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private String node;
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private boolean containsDuplicateFeatures;
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public DiscoverInfo() {
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super(ELEMENT, NAMESPACE);
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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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for (Feature f : d.features) {
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addFeature(f.clone());
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}
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// Copy identities
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for (Identity i : d.identities) {
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addIdentity(i.clone());
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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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* @return true if the feature did not already exist.
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*/
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public boolean addFeature(String feature) {
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return 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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public boolean addFeature(Feature feature) {
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features.add(feature);
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boolean featureIsNew = featuresSet.add(feature);
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if (!featureIsNew) {
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containsDuplicateFeatures = true;
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}
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return featureIsNew;
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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 unmodifiable list of the discovered features of an XMPP entity
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*/
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public List<Feature> getFeatures() {
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return Collections.unmodifiableList(features);
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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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identities.add(identity);
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identitiesSet.add(identity.getKey());
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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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for (Identity identity : identitiesToAdd) {
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addIdentity(identity);
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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 unmodifiable list of the discovered identities
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*/
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public List<Identity> getIdentities() {
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return Collections.unmodifiableList(identities);
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}
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/**
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* Returns true if this DiscoverInfo contains at least one Identity of the given category and type.
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*
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* @param category the category to look for.
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* @param type the type to look for.
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* @return true if this DiscoverInfo contains a Identity of the given category and type.
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*/
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public boolean hasIdentity(String category, String type) {
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String key = XmppStringUtils.generateKey(category, type);
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return identitiesSet.contains(key);
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}
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/**
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* Returns all Identities of the given category and type of this DiscoverInfo.
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*
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* @param category category the category to look for.
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* @param type type the type to look for.
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* @return a list of Identites with the given category and type.
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*/
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public List<Identity> getIdentities(String category, String type) {
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List<Identity> res = new ArrayList<>(identities.size());
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for (Identity identity : identities) {
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if (identity.getCategory().equals(category) && identity.getType().equals(type)) {
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res.add(identity);
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}
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}
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return res;
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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 requests feature has been discovered
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*/
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public boolean containsFeature(CharSequence feature) {
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return features.contains(new Feature(feature));
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}
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@Override
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protected IQChildElementXmlStringBuilder getIQChildElementBuilder(IQChildElementXmlStringBuilder xml) {
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xml.optAttribute("node", getNode());
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xml.rightAngleBracket();
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for (Identity identity : identities) {
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xml.append(identity.toXML());
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}
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for (Feature feature : features) {
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xml.append(feature.toXML());
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}
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return xml;
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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<>();
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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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return containsDuplicateFeatures;
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}
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@Override
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public DiscoverInfo clone() {
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return new DiscoverInfo(this);
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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 final class Identity implements Comparable<Identity>, TypedCloneable<Identity> {
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private final String category;
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private final String type;
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private final String key;
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private final String name;
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private final String lang; // 'xml:lang;
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public Identity(Identity identity) {
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this.category = identity.category;
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this.type = identity.type;
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this.key = identity.type;
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this.name = identity.name;
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this.lang = identity.lang;
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}
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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 (required as per XEP-30).
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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 type) {
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this(category, type, null, null);
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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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this(category, type, name, null);
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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 type the entity's type (required as per XEP-30).
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* @param name the entity's name.
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* @param lang the entity's lang.
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*/
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public Identity(String category, String type, String name, String lang) {
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this.category = StringUtils.requireNotNullNorEmpty(category, "category cannot be null");
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this.type = StringUtils.requireNotNullNorEmpty(type, "type cannot be null");
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this.key = XmppStringUtils.generateKey(category, type);
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this.name = name;
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this.lang = lang;
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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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* 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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private String getKey() {
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return key;
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}
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/**
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* Returns true if this identity is of the given category and type.
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*
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* @param category the category.
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* @param type the type.
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* @return true if this identity is of the given category and type.
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*/
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public boolean isOfCategoryAndType(String category, String type) {
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return this.category.equals(category) && this.type.equals(type);
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}
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public XmlStringBuilder toXML() {
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XmlStringBuilder xml = new XmlStringBuilder();
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xml.halfOpenElement("identity");
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xml.xmllangAttribute(lang);
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xml.attribute("category", category);
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xml.optAttribute("name", name);
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xml.optAttribute("type", type);
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xml.closeEmptyElement();
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return xml;
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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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@Override
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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.key.equals(other.key))
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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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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 + key.hashCode();
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result = 37 * result + (lang == null ? 0 : lang.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: Category, Type, Lang.
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* If all three are identical the other Identity is considered equal. Name is not used for
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* comparison, as defined by XEP-0115
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*
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* @param other
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* @return a negative integer, zero, or a positive integer as this object is less than,
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* equal to, or greater than the specified object.
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*/
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@Override
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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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@Override
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public Identity clone() {
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return new Identity(this);
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}
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@Override
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public String toString() {
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return toXML().toString();
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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 the requester to 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 final class Feature implements TypedCloneable<Feature> {
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private final String variable;
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public Feature(Feature feature) {
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this.variable = feature.variable;
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}
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public Feature(CharSequence variable) {
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this(variable.toString());
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}
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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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this.variable = StringUtils.requireNotNullNorEmpty(variable, "variable cannot be null");
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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 XmlStringBuilder toXML() {
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XmlStringBuilder xml = new XmlStringBuilder();
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xml.halfOpenElement("feature");
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xml.attribute("var", variable);
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xml.closeEmptyElement();
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return xml;
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}
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@Override
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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 variable.hashCode();
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}
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@Override
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public Feature clone() {
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return new Feature(this);
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}
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@Override
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public String toString() {
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return toXML().toString();
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}
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}
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}
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