MUCInitialPresence.java
/**
*
* Copyright 2003-2007 Jive Software.
*
* 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.muc.packet;
import java.util.Date;
import javax.xml.namespace.QName;
import org.jivesoftware.smack.packet.ExtensionElement;
import org.jivesoftware.smack.packet.NamedElement;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smack.util.XmlStringBuilder;
import org.jxmpp.util.XmppDateTime;
/**
* Represents extended presence information whose sole purpose is to signal the ability of
* the occupant to speak the MUC protocol when joining a room. If the room requires a password
* then the MUCInitialPresence should include one.
* <p>
* The amount of discussion history provided on entering a room (perhaps because the
* user is on a low-bandwidth connection or is using a small-footprint client) could be managed by
* setting a configured History instance to the MUCInitialPresence instance.
*
* @author Gaston Dombiak
* @see MUCInitialPresence#setHistory(MUCInitialPresence.History)
*/
public class MUCInitialPresence implements ExtensionElement {
public static final String ELEMENT = "x";
public static final String NAMESPACE = "http://jabber.org/protocol/muc";
public static final QName QNAME = new QName(NAMESPACE, ELEMENT);
// TODO make those fields final once deprecated setter methods have been removed.
private String password;
private History history;
/**
* Deprecated constructor.
* @deprecated use {@link #MUCInitialPresence(String, int, int, int, Date)} instead.
*/
@Deprecated
public MUCInitialPresence() {
}
/**
* Construct a new MUC initial presence extension.
*
* @param password the optional password used to enter the room.
* @param maxChars the maximal count of characters of history to request.
* @param maxStanzas the maximal count of stanzas of history to request.
* @param seconds the last seconds since when to request history.
* @param since the date since when to request history.
*/
public MUCInitialPresence(String password, int maxChars, int maxStanzas, int seconds, Date since) {
this.password = password;
if (maxChars > -1 || maxStanzas > -1 || seconds > -1 || since != null) {
this.history = new History(maxChars, maxStanzas, seconds, since);
} else {
this.history = null;
}
}
@Override
public String getElementName() {
return ELEMENT;
}
@Override
public String getNamespace() {
return NAMESPACE;
}
@Override
public XmlStringBuilder toXML(org.jivesoftware.smack.packet.XmlEnvironment enclosingNamespace) {
XmlStringBuilder xml = new XmlStringBuilder(this);
xml.rightAngleBracket();
xml.optElement("password", getPassword());
xml.optElement(getHistory());
xml.closeElement(this);
return xml;
}
/**
* Returns the history that manages the amount of discussion history provided on
* entering a room.
*
* @return the history that manages the amount of discussion history provided on
* entering a room.
*/
public History getHistory() {
return history;
}
/**
* Returns the password to use when the room requires a password.
*
* @return the password to use when the room requires a password.
*/
public String getPassword() {
return password;
}
/**
* Sets the History that manages the amount of discussion history provided on
* entering a room.
*
* @param history that manages the amount of discussion history provided on
* entering a room.
* @deprecated use {@link #MUCInitialPresence(String, int, int, int, Date)} instead.
*/
@Deprecated
public void setHistory(History history) {
this.history = history;
}
/**
* Sets the password to use when the room requires a password.
*
* @param password the password to use when the room requires a password.
* @deprecated use {@link #MUCInitialPresence(String, int, int, int, Date)} instead.
*/
@Deprecated
public void setPassword(String password) {
this.password = password;
}
/**
* Retrieve the MUCInitialPresence PacketExtension from packet, if any.
*
* @param packet TODO javadoc me please
* @return the MUCInitialPresence PacketExtension or {@code null}
* @deprecated use {@link #from(Stanza)} instead
*/
@Deprecated
public static MUCInitialPresence getFrom(Stanza packet) {
return from(packet);
}
/**
* Retrieve the MUCInitialPresence PacketExtension from packet, if any.
*
* @param packet TODO javadoc me please
* @return the MUCInitialPresence PacketExtension or {@code null}
*/
public static MUCInitialPresence from(Stanza packet) {
return packet.getExtension(MUCInitialPresence.class);
}
/**
* The History class controls the number of characters or messages to receive
* when entering a room.
*
* @author Gaston Dombiak
*/
public static class History implements NamedElement {
public static final String ELEMENT = "history";
private final int maxChars;
private final int maxStanzas;
private final int seconds;
private final Date since;
public History(int maxChars, int maxStanzas, int seconds, Date since) {
if (maxChars < 0 && maxStanzas < 0 && seconds < 0 && since == null) {
throw new IllegalArgumentException();
}
this.maxChars = maxChars;
this.maxStanzas = maxStanzas;
this.seconds = seconds;
this.since = since;
}
/**
* Returns the total number of characters to receive in the history.
*
* @return total number of characters to receive in the history.
*/
public int getMaxChars() {
return maxChars;
}
/**
* Returns the total number of messages to receive in the history.
*
* @return the total number of messages to receive in the history.
*/
public int getMaxStanzas() {
return maxStanzas;
}
/**
* Returns the number of seconds to use to filter the messages received during that time.
* In other words, only the messages received in the last "X" seconds will be included in
* the history.
*
* @return the number of seconds to use to filter the messages received during that time.
*/
public int getSeconds() {
return seconds;
}
/**
* Returns the since date to use to filter the messages received during that time.
* In other words, only the messages received since the datetime specified will be
* included in the history.
*
* @return the since date to use to filter the messages received during that time.
*/
public Date getSince() {
return since;
}
@Override
public XmlStringBuilder toXML(org.jivesoftware.smack.packet.XmlEnvironment enclosingNamespace) {
XmlStringBuilder xml = new XmlStringBuilder(this);
xml.optIntAttribute("maxchars", getMaxChars());
xml.optIntAttribute("maxstanzas", getMaxStanzas());
xml.optIntAttribute("seconds", getSeconds());
if (getSince() != null) {
xml.attribute("since", XmppDateTime.formatXEP0082Date(getSince()));
}
xml.closeEmptyElement();
return xml;
}
@Override
public String getElementName() {
return ELEMENT;
}
}
}