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Smack/source/org/jivesoftware/smack/packet/Message.java

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/**
* $RCSfile$
* $Revision$
* $Date$
*
* 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.smack.packet;
import org.jivesoftware.smack.util.StringUtils;
import java.util.*;
/**
* Represents XMPP message packets. A message can be one of several types:
*
* <ul>
* <li>Message.Type.NORMAL -- (Default) a normal text message used in email like interface.
* <li>Message.Type.CHAT -- a typically short text message used in line-by-line chat interfaces.
* <li>Message.Type.GROUP_CHAT -- a chat message sent to a groupchat server for group chats.
* <li>Message.Type.HEADLINE -- a text message to be displayed in scrolling marquee displays.
* <li>Message.Type.ERROR -- indicates a messaging error.
* </ul>
*
* For each message type, different message fields are typically used as follows:
* <p>
* <table border="1">
* <tr><td>&nbsp;</td><td colspan="5"><b>Message type</b></td></tr>
* <tr><td><i>Field</i></td><td><b>Normal</b></td><td><b>Chat</b></td><td><b>Group Chat</b></td><td><b>Headline</b></td><td><b>XMPPError</b></td></tr>
* <tr><td><i>subject</i></td> <td>SHOULD</td><td>SHOULD NOT</td><td>SHOULD NOT</td><td>SHOULD NOT</td><td>SHOULD NOT</td></tr>
* <tr><td><i>thread</i></td> <td>OPTIONAL</td><td>SHOULD</td><td>OPTIONAL</td><td>OPTIONAL</td><td>SHOULD NOT</td></tr>
* <tr><td><i>body</i></td> <td>SHOULD</td><td>SHOULD</td><td>SHOULD</td><td>SHOULD</td><td>SHOULD NOT</td></tr>
* <tr><td><i>error</i></td> <td>MUST NOT</td><td>MUST NOT</td><td>MUST NOT</td><td>MUST NOT</td><td>MUST</td></tr>
* </table>
*
* @author Matt Tucker
*/
public class Message extends Packet {
private Type type = Type.normal;
private String subject = null;
private String thread = null;
private String language;
private final Set<Body> bodies = new HashSet<Body>();
/**
* Creates a new, "normal" message.
*/
public Message() {
}
/**
* Creates a new "normal" message to the specified recipient.
*
* @param to the recipient of the message.
*/
public Message(String to) {
setTo(to);
}
/**
* Creates a new message of the specified type to a recipient.
*
* @param to the user to send the message to.
* @param type the message type.
*/
public Message(String to, Type type) {
setTo(to);
this.type = type;
}
/**
* Returns the type of the message. If no type has been set this method will return {@link
* org.jivesoftware.smack.packet.Message.Type#normal}.
*
* @return the type of the message.
*/
public Type getType() {
return type;
}
/**
* Sets the type of the message.
*
* @param type the type of the message.
* @throws IllegalArgumentException if null is passed in as the type
*/
public void setType(Type type) {
if (type == null) {
throw new IllegalArgumentException("Type cannot be null.");
}
this.type = type;
}
/**
* Returns the subject of the message, or null if the subject has not been set.
* The subject is a short description of message contents.
*
* @return the subject of the message.
*/
public String getSubject() {
return subject;
}
/**
* Sets the subject of the message. The subject is a short description of
* message contents.
*
* @param subject the subject of the message.
*/
public void setSubject(String subject) {
this.subject = subject;
}
/**
* Returns the body of the message, or null if the body has not been set. The body
* is the main message contents.
*
* @return the body of the message.
*/
public String getBody() {
return getBody(null);
}
/**
* Returns the body corresponding to the language. If the language is null, the method result
* will be the same as {@link #getBody()}. Null will be returned if the language does not have
* a corresponding body.
*
* @param language the language of the body to return.
* @return the body related to the passed in language.
* @since 3.0.2
*/
public String getBody(String language) {
language = parseXMLLang(language);
for (Body body : bodies) {
if ((body.langauge == null && language == null)
|| (body != null && body.langauge.equals(language))) {
return body.message;
}
}
return null;
}
/**
* Returns a set of all bodies in this Message, including the default message body accessible
* from {@link #getBody()}.
*
* @return a collection of all bodies in this Message.
* @since 3.0.2
*/
public Collection<Body> getBodies() {
return Collections.unmodifiableCollection(bodies);
}
/**
* Sets the body of the message. The body is the main message contents.
*
* @param body the body of the message.
*/
public void setBody(String body) {
if (body == null) {
removeBody("");
return;
}
addBody(null, body);
}
/**
* Adds a body with a corresponding language.
*
* @param language the language of the body being added.
* @param body the body being added to the message.
* @return the new {@link org.jivesoftware.smack.packet.Message.Body}
* @throws NullPointerException if the body is null, a null pointer exception is thrown
* @since 3.0.2
*/
public Body addBody(String language, String body) {
if (body == null) {
throw new NullPointerException("Body must be specified");
}
language = parseXMLLang(language);
Body messageBody = new Body(language, body);
bodies.add(messageBody);
return messageBody;
}
/**
* Removes the body with the given language from the message.
*
* @param language the language of the body which is to be removed
* @return true if a body was removed and false if it was not.
*/
public boolean removeBody(String language) {
language = parseXMLLang(language);
for (Body body : bodies) {
if (language.equals(body.langauge)) {
return bodies.remove(body);
}
}
return false;
}
/**
* Removes the body from the message and returns true if the body was removed.
*
* @param body the body being removed from the message.
* @return true if the body was successfully removed and false if it was not.
* @since 3.0.2
*/
public boolean removeBody(Body body) {
return bodies.remove(body);
}
/**
* Returns all the languages being used for the bodies, not including the default body.
*
* @return the languages being used for the bodies.
* @since 3.0.2
*/
public Collection<String> getBodyLanguages() {
List<String> languages = new ArrayList<String>(bodies.size());
for (Body body : bodies) {
if (!parseXMLLang(body.langauge).equals(getDefaultLanguage())) {
languages.add(body.langauge);
}
}
return Collections.unmodifiableCollection(languages);
}
/**
* Returns the thread id of the message, which is a unique identifier for a sequence
* of "chat" messages. If no thread id is set, <tt>null</tt> will be returned.
*
* @return the thread id of the message, or <tt>null</tt> if it doesn't exist.
*/
public String getThread() {
return thread;
}
/**
* Sets the thread id of the message, which is a unique identifier for a sequence
* of "chat" messages.
*
* @param thread the thread id of the message.
*/
public void setThread(String thread) {
this.thread = thread;
}
/**
* Returns the xml:lang of this Message.
*
* @return the xml:lang of this Message.
* @since 3.0.2
*/
private String getLanguage() {
return language;
}
/**
* Sets the xml:lang of this Message.
*
* @param language the xml:lang of this Message.
* @since 3.0.2
*/
public void setLanguage(String language) {
this.language = language;
}
public String toXML() {
StringBuilder buf = new StringBuilder();
buf.append("<message");
if (getXmlns() != null) {
buf.append(" xmlns=\"").append(getXmlns()).append("\"");
}
if (language != null) {
buf.append(" xml:lang=\"").append(getLanguage()).append("\"");
}
if (getPacketID() != null) {
buf.append(" id=\"").append(getPacketID()).append("\"");
}
if (getTo() != null) {
buf.append(" to=\"").append(StringUtils.escapeForXML(getTo())).append("\"");
}
if (getFrom() != null) {
buf.append(" from=\"").append(StringUtils.escapeForXML(getFrom())).append("\"");
}
if (type != Type.normal) {
buf.append(" type=\"").append(type).append("\"");
}
buf.append(">");
if (subject != null) {
buf.append("<subject>").append(StringUtils.escapeForXML(subject)).append("</subject>");
}
// Add the body in the default language
if (getBody() != null) {
buf.append("<body>").append(StringUtils.escapeForXML(getBody())).append("</body>");
}
// Add the bodies in other languages
for (Body body : getBodies()) {
// Skip the default language
if (DEFAULT_LANGUAGE.equals(body.getLanguage()) || body.getLanguage() == null) {
continue;
}
buf.append("<body xml:lang=\"").append(body.getLanguage()).append("\">");
buf.append(StringUtils.escapeForXML(body.getMessage()));
buf.append("</body>");
}
if (thread != null) {
buf.append("<thread>").append(thread).append("</thread>");
}
// Append the error subpacket if the message type is an error.
if (type == Type.error) {
XMPPError error = getError();
if (error != null) {
buf.append(error.toXML());
}
}
// Add packet extensions, if any are defined.
buf.append(getExtensionsXML());
buf.append("</message>");
return buf.toString();
}
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Message message = (Message) o;
if(!super.equals(message)) { return false; }
if (bodies.size() != message.bodies.size() || !bodies.containsAll(message.bodies)) {
return false;
}
if (language != null ? !language.equals(message.language) : message.language != null) {
return false;
}
if (subject != null ? !subject.equals(message.subject) : message.subject != null) {
return false;
}
if (thread != null ? !thread.equals(message.thread) : message.thread != null) {
return false;
}
return type == message.type;
}
public int hashCode() {
int result;
result = (type != null ? type.hashCode() : 0);
result = 31 * result + (subject != null ? subject.hashCode() : 0);
result = 31 * result + (thread != null ? thread.hashCode() : 0);
result = 31 * result + (language != null ? language.hashCode() : 0);
result = 31 * result + bodies.hashCode();
return result;
}
/**
* Represents a message body, its language and the content of the message.
*/
public static class Body {
private String message;
private String langauge;
private Body(String language, String message) {
if (message == null) {
throw new NullPointerException("Message cannot be null.");
}
this.langauge = language;
this.message = message;
}
/**
* Returns the language of this message body. If the language is null, then, no language
* was specified.
*
* @return the language of this message body.
*/
public String getLanguage() {
if (DEFAULT_LANGUAGE.equals(langauge)) {
return null;
}
else {
return langauge;
}
}
/**
* Returns the message content.
*
* @return the content of the message.
*/
public String getMessage() {
return message;
}
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) { return false; }
Body body = (Body) o;
if (langauge != null ? !langauge.equals(body.langauge) : body.langauge != null) {
return false;
}
return message.equals(body.message);
}
public int hashCode() {
int result;
result = message.hashCode();
result = 31 * result + (langauge != null ? langauge.hashCode() : 0);
return result;
}
}
/**
* Represents the type of a message.
*/
public enum Type {
/**
* (Default) a normal text message used in email like interface.
*/
normal,
/**
* Typically short text message used in line-by-line chat interfaces.
*/
chat,
/**
* Chat message sent to a groupchat server for group chats.
*/
groupchat,
/**
* Text message to be displayed in scrolling marquee displays.
*/
headline,
/**
* indicates a messaging error.
*/
error;
public static Type fromString(String name) {
try {
return Type.valueOf(name);
}
catch (Exception e) {
return normal;
}
}
}
}
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