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#ifndef __com_sun_star_lang_XConnectionPoint_idl__
#define __com_sun_star_lang_XConnectionPoint_idl__

#ifndef __com_sun_star_uno_XInterface_idl__
#include <com/sun/star/uno/XInterface.idl>
#endif

#ifndef __com_sun_star_lang_XConnectionPointContainer_idl__
#include <com/sun/star/lang/XConnectionPointContainer.idl>
#endif

#ifndef __com_sun_star_lang_ListenerExistException_idl__
#include <com/sun/star/lang/ListenerExistException.idl>
#endif

#ifndef __com_sun_star_lang_InvalidListenerException_idl__
#include <com/sun/star/lang/InvalidListenerException.idl>
#endif


//=============================================================================

module com {  module sun {  module star {  module lang {

//=============================================================================

// DocMerge from idl: interface com::sun::star::lang::XConnectionPoint
/** supports connection points for connectable objects.

    <p>Connectable objects support the following features: </p>

    <ul>
        <li>outgoing interfaces, such as event sets; </li>
        <li>the ability to enumerate the types of the outgoing interfaces;
        <li>the ability to connect and disconnect sinks to the object
            for those outgoing types; </li>
        <li>the ability to enumerate the connections that exist to a
            particular outgoing interface.  </li>
    </ul>

    <h4>When to Implement?<h4>

    <p>To create a connectable object, you need to implement objects
    that provide two related interfaces: </p>

    <ul>
        <li><type>XConnectionPointContainer</type> </li>
        <li><type>XConnectionPoint</type> </li>
    </ul>

    <p>The <type>XConnectionPointContainer</type> interface is implemented
    on the connectable object to indicate the existence of the outgoing
    interfaces. It provides a sequence of sub-objects.  It also provides
    access to all the connection point sub-objects, each of which
    implements the <type>XConnectionPoint</type> interface. The
    <type>XConnectionPoint</type> interface provides a sequence of
    sub-objects.  </p>

    <p>Each connection point is a separate sub-object to avoid circular
    reference counting problems.  A connection point controls how many
    connections (one or more) it will allow in its implementation of
    <member>XConnectionPoint::advise()</member>.  </p>

    <h4>When to use?</h4>

    <p>A client can use the <type>XConnectionPointContainer</type> interface: </p>

    <UL>

        <LI>to get a sequence of connection points for each outgoing type. </LI>

        <LI>to obtain access to connection point sub-objects with the
            <type>XConnectionPoint</type> interface for each
            outgoing type. Through the XConnectionPoint interface,
            a client starts or terminates an advisory loop with the
            connectable object and the client's own sink.  The
            client can also use the <type>XConnectionPoint</type>
            interface to get a sequence of the connections that it
            knows about. </LI>
    </UL>

    @see        XConnectionPointContainer
 */
published interface XConnectionPoint: com::sun::star::uno::XInterface
{
    //-------------------------------------------------------------------------

    // DocMerge from idl: method com::sun::star::lang::XConnectionPoint::getConnectionType
    /** @returns
                the type of the outgoing interface managed by this
                connection point.

        <p>Using the <member>XConnectionPointContainer::getConnectionPoints</member>
        method, a client can obtain an <type>XConnectionPoint</type>
        interface.  Using that interface and this method, the client
        can determine the type of each connection point enumerated. The
        type returned from this method must enable the caller to access
        this same connection point through
        <member>XConnectionPointContainer::findConnectionPoint</member>.

        @see XConnectionPointContainer::findConnectionPoint
     */
    type getConnectionType();

    //-------------------------------------------------------------------------

    // DocMerge from idl: method com::sun::star::lang::XConnectionPoint::getConnectionPointContainer
    /** @returns
            the <type>XConnectionPointContainer</type> interface on
            the parent connectable object.

        @see XConnectionPointContainer
     */
    com::sun::star::lang::XConnectionPointContainer getConnectionPointContainer();

    //-------------------------------------------------------------------------

    // DocMerge from idl: method com::sun::star::lang::XConnectionPoint::advise
    /** creates a connection between a connection point and a
        client's sink, where the sink implements the outgoing interface
        supported by this connection point.

        <p>A few <code>add...Listener</code> methods need additional parameters
        to add listeners or throw exceptions. One of these methods is
        <member scope="com::sun::star::beans">XPropertySet::addPropertyChangeListener</member>.
        We ignore the problem in this interface. A solution must be provided
        in an additional <type>XConnectionPoint</type> interface.  </p>

        @param xListener
            specifies the listener interface on the client's advise sink.
            The client's sink receives outgoing calls from the
            connection point container.

        @throws ListenerExistException
            if it is a unicast broadcaster and a listener is already set.

        @throws InvalidListenerException
            if the listener does not supply the needed interfaces.

        @see com::sun::star::beans::XPropertySet::addPropertyChangeListener
     */
    void advise( [in] com::sun::star::uno::XInterface xListener )
            raises( com::sun::star::lang::ListenerExistException,
                    com::sun::star::lang::InvalidListenerException );

    //-------------------------------------------------------------------------

    // DocMerge from idl: method com::sun::star::lang::XConnectionPoint::unadvise
    /** terminates a notification previously set up with advise.

        <p>A few <code>remove...Listener</code> methods need additional
        parameters to add listeners or throw exceptions. One of these methods
        is <member scope="com::sun::star::beans">XPropertySet::removePropertyChangeListener</member>.
        We ignore the problem in this interface. A solution must be
        provided in an additional <type>XConnectionPoint</type> interface.  </p>

        @param listener
            specifies the listener interface on the client's advise sink.

        @see com::sun::star::beans::XPropertySet::removePropertyChangeListener
     */
    void unadvise( [in] com::sun::star::uno::XInterface xListener );

    //-------------------------------------------------------------------------

    // DocMerge from idl: method com::sun::star::lang::XConnectionPoint::getConnections
    /** @returns
                a sequence of all currently advised connections.
     */
    sequence<com::sun::star::uno::XInterface> getConnections();

};

//=============================================================================

}; }; }; };

#endif
