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// __________ Implementation __________

/**
 * support ONE singleton uno connection to a running office installation!
 * Can be used to open/use/close connection to uno environment of an office. If
 * necessary a new office instance is started.
 * ctor isn't available from outside. You should call static function
 * "getConnection()" to open or use internal set connection which is created one
 * times only.
 *
 */
public class OfficeConnect
{


    /**
     * At first call we create static connection object and open connection to an
     * office - a new office instance is started if necessary
     * Then - and for all further requests we return these static connection member.
     */
    public static synchronized void createConnection()
    {
        if (maConnection == null)
            maConnection = new OfficeConnect();
    }







    /**
     * ctor
     * We try to open the connection in our ctor ... transparently for user.
     * After it was successful you will find an internal set member
     * m_xRemoteContext which means remote component context of the connected office.
     * The context can be used to get the remote service manager from the office.
     * We made it private to support singleton pattern of these implementation.
     * see getConnection() for further information
     */
    private OfficeConnect()
    {
        try
        {
            // get the remote office context. If necessary a new office
            // process is started
            mxOfficeContext = com.sun.star.comp.helper.Bootstrap.bootstrap();
            System.out.println("Connected to a running office ...");
            mxServiceManager = mxOfficeContext.getServiceManager();
        }
        catch (java.lang.Exception ex)
        {
            System.err.println("connection failed" + ex);
            ex.printStackTrace(System.err);
            System.exit(1);

        }
    }







    /**
     * returns remote component context of the connected office
     */
    public static synchronized com.sun.star.uno.XComponentContext getOfficeContext()
    {
        return mxOfficeContext;
    }



    /**
     * member
     */
    // singleton connection instance
    private static OfficeConnect maConnection;

    // reference to the office component context
    private static com.sun.star.uno.XComponentContext  mxOfficeContext;
    // reference to remote service manager of singleton connection object
    private static com.sun.star.lang.XMultiComponentFactory  mxServiceManager;
}

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