/*************************************************************************
 *
 *  $RCSfile: servicehandler.cxx,v $
 *
 *  $Revision: 1.5 $
 *
 *  last change: $Author: obo $ $Date: 2004-11-15 17:15:51 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
 *
 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
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 *  Lesser General Public License for more details.
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 *
 *
 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source License Version 1.1 (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.openoffice.org/license.html.
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 ************************************************************************/

//_________________________________________________________________________________________________________________
//  my own includes
//_________________________________________________________________________________________________________________

#ifndef __FRAMEWORK_DISPATCH_SERVICEHANDLER_HXX_
#include <dispatch/servicehandler.hxx>
#endif

#ifndef __FRAMEWORK_THREADHELP_READGUARD_HXX_
#include <threadhelp/readguard.hxx>
#endif

#ifndef __FRAMEWORK_GENERAL_H_
#include <general.h>
#endif

#ifndef __FRAMEWORK_SERVICES_H_
#include <services.h>
#endif

//_________________________________________________________________________________________________________________
//  interface includes
//_________________________________________________________________________________________________________________

#ifndef _COM_SUN_STAR_FRAME_DISPATCHRESULTSTATE_HPP_
#include <com/sun/star/frame/DispatchResultState.hpp>
#endif

#ifndef _COM_SUN_STAR_TASK_XJOBEXECUTOR_HPP_
#include <com/sun/star/task/XJobExecutor.hpp>
#endif

//_________________________________________________________________________________________________________________
//  includes of other projects
//_________________________________________________________________________________________________________________

#include <vcl/svapp.hxx>

//_________________________________________________________________________________________________________________
//  namespace
//_________________________________________________________________________________________________________________

namespace framework{

//_________________________________________________________________________________________________________________
//  non exported const
//_________________________________________________________________________________________________________________

#define PROTOCOL_VALUE      "service:"
#define PROTOCOL_LENGTH     8

//_________________________________________________________________________________________________________________
//  non exported definitions
//_________________________________________________________________________________________________________________

//_________________________________________________________________________________________________________________
//  declarations
//_________________________________________________________________________________________________________________

//_________________________________________________________________________________________________________________
// XInterface, XTypeProvider, XServiceInfo

DEFINE_XINTERFACE_5(ServiceHandler                                  ,
                    OWeakObject                                     ,
                    DIRECT_INTERFACE(css::lang::XTypeProvider      ),
                    DIRECT_INTERFACE(css::lang::XServiceInfo       ),
                    DIRECT_INTERFACE(css::frame::XDispatchProvider ),
                    DIRECT_INTERFACE(css::frame::XNotifyingDispatch),
                    DIRECT_INTERFACE(css::frame::XDispatch         ))

DEFINE_XTYPEPROVIDER_5(ServiceHandler                ,
                       css::lang::XTypeProvider      ,
                       css::lang::XServiceInfo       ,
                       css::frame::XDispatchProvider ,
                       css::frame::XNotifyingDispatch,
                       css::frame::XDispatch         )

DEFINE_XSERVICEINFO_MULTISERVICE(ServiceHandler                   ,
                                 ::cppu::OWeakObject              ,
                                 SERVICENAME_PROTOCOLHANDLER      ,
                                 IMPLEMENTATIONNAME_SERVICEHANDLER)

DEFINE_INIT_SERVICE(ServiceHandler,
                    {
                        /*Attention
                            I think we don't need any mutex or lock here ... because we are called by our own static method impl_createInstance()
                            to create a new instance of this class by our own supported service factory.
                            see macro DEFINE_XSERVICEINFO_MULTISERVICE and "impl_initService()" for further informations!
                        */
                    }
                   )

//_________________________________________________________________________________________________________________

/**
    @short      standard ctor
    @descr      These initialize a new instance of ths class with needed informations for work.

    @param      xFactory
                reference to uno servicemanager for creation of new services

    @modified   02.05.2002 08:16, as96863
*/
ServiceHandler::ServiceHandler( const css::uno::Reference< css::lang::XMultiServiceFactory >& xFactory )
        //  Init baseclasses first
        : ThreadHelpBase( &Application::GetSolarMutex() )
        , OWeakObject   (                               )
        // Init member
        , m_xFactory    ( xFactory                      )
{
}

//_________________________________________________________________________________________________________________

/**
    @short      standard dtor
    @descr      -

    @modified   02.05.2002 08:16, as96863
*/
ServiceHandler::~ServiceHandler()
{
    m_xFactory = NULL;
}

//_________________________________________________________________________________________________________________

/**
    @short      decide if this dispatch implementation can be used for requested URL or not
    @descr      A protocol handler is registerd for an URL pattern inside configuration and will
                be asked by the generic dispatch mechanism inside framework, if he can handle this
                special URL wich match his registration. He can agree by returning of a valid dispatch
                instance or disagree by returning <NULL/>.
                We don't create new dispatch instances here realy - we return THIS as result to handle it
                at the same implementation.

    @modified   02.05.2002 15:25, as96863
*/
css::uno::Reference< css::frame::XDispatch > SAL_CALL ServiceHandler::queryDispatch( const css::util::URL&  aURL    ,
                                                                                     const ::rtl::OUString& sTarget ,
                                                                                           sal_Int32        nFlags  ) throw( css::uno::RuntimeException )
{
    css::uno::Reference< css::frame::XDispatch > xDispatcher;
    if (aURL.Complete.compareToAscii(PROTOCOL_VALUE,PROTOCOL_LENGTH)==0)
        xDispatcher = this;
    return xDispatcher;
}

//_________________________________________________________________________________________________________________

/**
    @short      do the same like dispatch() but for multiple requests at the same time
    @descr      -

    @modified   02.05.2002 15:27, as96863
*/
css::uno::Sequence< css::uno::Reference< css::frame::XDispatch > > SAL_CALL ServiceHandler::queryDispatches( const css::uno::Sequence< css::frame::DispatchDescriptor >& lDescriptor ) throw( css::uno::RuntimeException )
{
    sal_Int32 nCount = lDescriptor.getLength();
    css::uno::Sequence< css::uno::Reference< css::frame::XDispatch > > lDispatcher( nCount );
    for( sal_Int32 i=0; i<nCount; ++i )
    {
        lDispatcher[i] = this->queryDispatch(
                            lDescriptor[i].FeatureURL,
                            lDescriptor[i].FrameName,
                            lDescriptor[i].SearchFlags);
    }
    return lDispatcher;
}

//_________________________________________________________________________________________________________________

/**
    @short      dispatch URL with arguments
    @descr      We use threadsafe internal method to do so. It returns a state value - but we ignore it.
                Because we doesn't support status listener notifications here.

    @param      aURL
                    uno URL which should be executed
    @param      lArguments
                    list of optional arguments for this request

    @modified   02.05.2002 08:19, as96863
*/
void SAL_CALL ServiceHandler::dispatch( const css::util::URL&                                  aURL       ,
                                    const css::uno::Sequence< css::beans::PropertyValue >& lArguments ) throw( css::uno::RuntimeException )
{
    // dispatch() is an [oneway] call ... and may our user release his reference to us immediatly.
    // So we should hold us self alive till this call ends.
    css::uno::Reference< css::frame::XNotifyingDispatch > xSelfHold(static_cast< ::cppu::OWeakObject* >(this), css::uno::UNO_QUERY);
    implts_dispatch(aURL,lArguments);
    // No notification for status listener!
}

//_________________________________________________________________________________________________________________

/**
    @short      dispatch with guaranteed notifications about success
    @descr      We use threadsafe internal method to do so. Return state of this function will be used
                for notification if an optional listener is given.

    @param      aURL
                    uno URL which should be executed
    @param      lArguments
                    list of optional arguments for this request
    @param      xListener
                    optional listener for state events

    @modified   30.04.2002 14:49, as96863
*/
void SAL_CALL ServiceHandler::dispatchWithNotification( const css::util::URL&                                             aURL      ,
                                                        const css::uno::Sequence< css::beans::PropertyValue >&            lArguments,
                                                        const css::uno::Reference< css::frame::XDispatchResultListener >& xListener ) throw( css::uno::RuntimeException )
{
    // This class was designed to die by reference. And if user release his reference to us immediatly after calling this method
    // we can run into some problems. So we hold us self alive till this method ends.
    // Another reason: We can use this reference as source of sending event at the end too.
    css::uno::Reference< css::frame::XNotifyingDispatch > xThis(static_cast< ::cppu::OWeakObject* >(this), css::uno::UNO_QUERY);

    css::uno::Reference< css::uno::XInterface > xService = implts_dispatch(aURL,lArguments);
    if (xListener.is())
    {
        css::frame::DispatchResultEvent aEvent;
        if (xService.is())
            aEvent.State = css::frame::DispatchResultState::SUCCESS;
        else
            aEvent.State = css::frame::DispatchResultState::FAILURE;
        aEvent.Result <<= xService; // may NULL for state=FAILED!
        aEvent.Source = xThis;

        xListener->dispatchFinished( aEvent );
    }
}

//_________________________________________________________________________________________________________________

/**
    @short      threadsafe helper for dispatch calls
    @descr      We support two interfaces for the same process - dispatch URLs. That the reason for this internal
                function. It implements the real dispatch operation and returns a state value which inform caller
                about success. He can notify listener then by using this return value.

    @param      aURL
                    uno URL which should be executed
    @param      lArguments
                    list of optional arguments for this request

    @return     <NULL/> if requested service couldn't be created successullfy;
                a valid reference otherwise. This return value can be used to indicate,
                if dispatch was successfully or not.

    @modified   02.05.2002 10:51, as96863
*/
css::uno::Reference< css::uno::XInterface > ServiceHandler::implts_dispatch( const css::util::URL&                                  aURL       ,
                                                                             const css::uno::Sequence< css::beans::PropertyValue >& lArguments ) throw( css::uno::RuntimeException )
{
    /* SAFE */
    ReadGuard aReadLock( m_aLock );
    css::uno::Reference< css::lang::XMultiServiceFactory > xFactory = m_xFactory;
    aReadLock.unlock();
    /* SAFE */

    if (!xFactory.is())
        return css::uno::Reference< css::uno::XInterface >();

    // extract service name and may optional given parameters from given URL
    // and use it to create and start the component
    ::rtl::OUString sServiceAndArguments = aURL.Complete.copy(PROTOCOL_LENGTH);
    ::rtl::OUString sServiceName;
    ::rtl::OUString sArguments  ;

    sal_Int32 nArgStart = sServiceAndArguments.indexOf('?',0);
    if (nArgStart!=-1)
    {
        sServiceName = sServiceAndArguments.copy(0,nArgStart);
        ++nArgStart; // ignore '?'!
        sArguments   = sServiceAndArguments.copy(nArgStart);
    }
    else
    {
        sServiceName = sServiceAndArguments;
    }

    if (!sServiceName.getLength())
        return css::uno::Reference< css::uno::XInterface >();

    // If a service doesnt support an optional job executor interface - he can't get
    // any given parameters!
    // Because we can't know if we must call createInstanceWithArguments() or XJobExecutor::trigger() ...

    css::uno::Reference< css::uno::XInterface > xService;
    try
    {
        // => a) a service starts running inside his own ctor and we create it only
        xService = xFactory->createInstance(sServiceName);
        // or b) he implements the right interface and starts there (may with optional parameters)
        css::uno::Reference< css::task::XJobExecutor > xExecuteable(xService, css::uno::UNO_QUERY);
        if (xExecuteable.is())
            xExecuteable->trigger(sArguments);
    }
    // ignore all errors - inclusive runtime errors!
    // E.g. a script based service (written in phyton) could not be executed
    // because it contains syntax errors, which was detected at runtime ...
    catch(const css::uno::Exception&)
        { xService.clear(); }

    return xService;
}

//_________________________________________________________________________________________________________________

/**
    @short      add/remove listener for state events
    @descr      We use an internal container to hold such registered listener. This container lives if we live.
                And if call pas registration as non breakable transaction - we can accept the request without
                any explicit lock. Because we share our mutex with this container.

    @param      xListener
                    reference to a valid listener for state events
    @param      aURL
                    URL about listener will be informed, if something occured

    @modified   30.04.2002 14:49, as96863
*/
void SAL_CALL ServiceHandler::addStatusListener( const css::uno::Reference< css::frame::XStatusListener >& xListener ,
                                                 const css::util::URL&                                     aURL      ) throw( css::uno::RuntimeException )
{
    // not suported yet
}

//_________________________________________________________________________________________________________________

void SAL_CALL ServiceHandler::removeStatusListener( const css::uno::Reference< css::frame::XStatusListener >& xListener ,
                                                    const css::util::URL&                                     aURL      ) throw( css::uno::RuntimeException )
{
    // not suported yet
}

}       //  namespace framework
