Package org.jivesoftware.smackx.xroster.packet

Class RosterExchange

  • All Implemented Interfaces:
    Element, ExtensionElement, FullyQualifiedElement, NamedElement, XmlLangElement
    public class RosterExchange
extends Object
implements ExtensionElement
    Represents XMPP Roster Item Exchange packets.

    The 'jabber:x:roster' namespace (which is not to be confused with the 'jabber:iq:roster' namespace) is used to send roster items from one client to another. A roster item is sent by adding to the <message/> element an <x/> child scoped by the 'jabber:x:roster' namespace. This <x/> element may contain one or more <item/> children (one for each roster item to be sent).

    Each <item/> element may possess the following attributes:

    <jid/> -- The id of the contact being sent. This attribute is required.
    <name/> -- A natural-language nickname for the contact. This attribute is optional.

    Each <item/> element may also contain one or more <group/> children specifying the natural-language name of a user-specified group, for the purpose of categorizing this contact into one or more roster groups.

    • Constructor Detail

      • RosterExchange

        public RosterExchange()
        Creates a new empty roster exchange package.

      • RosterExchange

        public RosterExchange​(Roster roster)
        Creates a new roster exchange package with the entries specified in roster.
        Parameters:
        roster - the roster to send to other XMPP entity.

    • Method Detail

      • addRosterEntry

        public void addRosterEntry​(RosterEntry rosterEntry)
        Adds a roster entry to the packet.
        Parameters:
        rosterEntry - a roster entry to add.

      • addRosterEntry

        public void addRosterEntry​(RemoteRosterEntry remoteRosterEntry)
        Adds a remote roster entry to the packet.
        Parameters:
        remoteRosterEntry - a remote roster entry to add.

      • getElementName

        public String getElementName()
        Returns the XML element name of the extension sub-packet root element. Always returns "x"
        Specified by:
        getElementName in interface NamedElement
        Returns:
        the XML element name of the stanza extension.

      • getNamespace

        public String getNamespace()
        Returns the XML namespace of the extension sub-packet root element. According the specification the namespace is always "jabber:x:roster" (which is not to be confused with the 'jabber:iq:roster' namespace
        Specified by:
        getNamespace in interface FullyQualifiedElement
        Returns:
        the XML namespace of the stanza extension.

      • getEntryCount

        public int getEntryCount()
        Returns a count of the entries in the roster exchange.
        Returns:
        the number of entries in the roster exchange.

      • toXML

        public String toXML​(XmlEnvironment enclosingNamespace)
        Returns the XML representation of a Roster Item Exchange according the specification. Usually the XML representation will be inside of a Message XML representation like in the following example: 
         <message id="MlIpV-4" to="gato1@gato.home" from="gato3@gato.home/Smack">
     <subject>Any subject you want</subject>
     <body>This message contains roster items.</body>
     <x xmlns="jabber:x:roster">
         <item jid="gato1@gato.home"/>
         <item jid="gato2@gato.home"/>
     </x>
 </message>
        Specified by:
        toXML in interface Element