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/*************************************************************************
 *
 *  $RCSfile: sortdynres.cxx,v $
 *
 *  $Revision: 1.6 $
 *
 *  last change: $Author: kso $ $Date: 2001-04-05 09:49:31 $
 *
 *  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
 *  License version 2.1, as published by the Free Software Foundation.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA  02111-1307  USA
 *
 *
 *  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.
 *
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 *
 *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 *
 *  Copyright: 2000 by Sun Microsystems, Inc.
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): _______________________________________
 *
 *
 ************************************************************************/

#include <sortdynres.hxx>

#ifndef _CPPUHELPER_INTERFACECONTAINER_HXX_
#include <cppuhelper/interfacecontainer.hxx>
#endif

#ifndef  _COM_SUN_STAR_UCB_CONTENTRESULTSETCAPABILITY_HPP_
#include <com/sun/star/ucb/ContentResultSetCapability.hpp>
#endif
#ifndef  _COM_SUN_STAR_UCB_LISTACTIONTYPE_HPP_
#include <com/sun/star/ucb/ListActionType.hpp>
#endif
#ifndef  _COM_SUN_STAR_UCB_WELCOMEDYNAMICRESULTSETSTRUCT_HPP_
#include <com/sun/star/ucb/WelcomeDynamicResultSetStruct.hpp>
#endif
#ifndef _COM_SUN_STAR_UCB_XCACHEDDYNAMICRESULTSETSTUBFACTORY_HPP_
#include <com/sun/star/ucb/XCachedDynamicResultSetStubFactory.hpp>
#endif
#ifndef _COM_SUN_STAR_UCB_XSOURCEINITIALIZATION_HPP_
#include <com/sun/star/ucb/XSourceInitialization.hpp>
#endif

//-----------------------------------------------------------------------------
using namespace com::sun::star::beans;
using namespace com::sun::star::lang;
using namespace com::sun::star::sdbc;
using namespace com::sun::star::ucb;
using namespace com::sun::star::uno;
using namespace cppu;
using namespace rtl;

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

//  The mutex to synchronize access to containers.
static osl::Mutex& getContainerMutex()
{
    static osl::Mutex* pMutex = NULL;
    if( !pMutex )
    {
        osl::Guard< osl::Mutex > aGuard( osl::Mutex::getGlobalMutex() );
        if( !pMutex )
        {
            static osl::Mutex aMutex;
            pMutex = &aMutex;
        }
    }

    return *pMutex;
}

//=========================================================================
//
// SortedDynamicResultSet
//
//=========================================================================

SortedDynamicResultSet::SortedDynamicResultSet(
                        const Reference < XDynamicResultSet > &xOriginal,
                        const Sequence < NumberedSortingInfo > &aOptions,
                        const Reference < XAnyCompareFactory > &xCompFac,
                        const Reference < XMultiServiceFactory > &xSMgr )
{
    mpDisposeEventListeners = NULL;
    mpOwnListener           = new SortedDynamicResultSetListener( this );

    mxOwnListener = Reference< XDynamicResultSetListener >( mpOwnListener );

    mxOriginal  = xOriginal;
    maOptions   = aOptions;
    mxCompFac   = xCompFac;
    mxSMgr      = xSMgr;

    mpOne = NULL;
    mpTwo = NULL;

    mbGotWelcome    = sal_False;
    mbUseOne        = sal_True;
    mbStatic        = sal_False;
}

//--------------------------------------------------------------------------
SortedDynamicResultSet::~SortedDynamicResultSet()
{
    mpOwnListener->impl_OwnerDies();
    mxOwnListener.clear();

    delete mpDisposeEventListeners;

    mxOne.clear();
    mxTwo.clear();
    mxOriginal.clear();

    mpOne = NULL;
    mpTwo = NULL;
}

//--------------------------------------------------------------------------
// XInterface methods.
//--------------------------------------------------------------------------

XINTERFACE_IMPL_4( SortedDynamicResultSet,
                   XTypeProvider,
                   XServiceInfo,
                   XComponent,      /* base class of XDynamicResultSet */
                   XDynamicResultSet );

//--------------------------------------------------------------------------
// XTypeProvider methods.
//--------------------------------------------------------------------------

XTYPEPROVIDER_IMPL_3( SortedDynamicResultSet,
                      XTypeProvider,
                         XServiceInfo,
                      XDynamicResultSet );

//--------------------------------------------------------------------------
// XServiceInfo methods.
//--------------------------------------------------------------------------

XSERVICEINFO_NOFACTORY_IMPL_1( SortedDynamicResultSet,
                                   OUString::createFromAscii(
                                   "com.sun.star.comp.ucb.SortedDynamicResultSet" ),
                                   OUString::createFromAscii(
                                   DYNAMIC_RESULTSET_SERVICE_NAME ) );

//--------------------------------------------------------------------------
// XComponent methods.
//--------------------------------------------------------------------------
void SAL_CALL SortedDynamicResultSet::dispose()
    throw( RuntimeException )
{
    osl::Guard< osl::Mutex > aGuard( maMutex );

    if ( mpDisposeEventListeners && mpDisposeEventListeners->getLength() )
    {
        EventObject aEvt;
        aEvt.Source = static_cast< XComponent * >( this );
        mpDisposeEventListeners->disposeAndClear( aEvt );
    }

    mxOne.clear();
    mxTwo.clear();
    mxOriginal.clear();

    mpOne = NULL;
    mpTwo = NULL;
    mbUseOne = sal_True;
}

//--------------------------------------------------------------------------
void SAL_CALL SortedDynamicResultSet::addEventListener(
                            const Reference< XEventListener >& Listener )
    throw( RuntimeException )
{
    osl::Guard< osl::Mutex > aGuard( maMutex );

    if ( !mpDisposeEventListeners )
        mpDisposeEventListeners =
                    new OInterfaceContainerHelper( getContainerMutex() );

    mpDisposeEventListeners->addInterface( Listener );
}

//--------------------------------------------------------------------------
void SAL_CALL SortedDynamicResultSet::removeEventListener(
                            const Reference< XEventListener >& Listener )
    throw( RuntimeException )
{
    osl::Guard< osl::Mutex > aGuard( maMutex );

    if ( mpDisposeEventListeners )
        mpDisposeEventListeners->removeInterface( Listener );
}

//--------------------------------------------------------------------------
// XDynamicResultSet methods.
// ------------------------------------------------------------------------------
Reference< XResultSet > SAL_CALL
SortedDynamicResultSet::getStaticResultSet()
    throw( ListenerAlreadySetException, RuntimeException )
{
    osl::Guard< osl::Mutex > aGuard( maMutex );

    if ( mxListener.is() )
        throw ListenerAlreadySetException();

    mbStatic = sal_True;

    if ( mxOriginal.is() )
    {
        mpOne = new SortedResultSet( mxOriginal->getStaticResultSet() );
        mxOne = mpOne;
        mpOne->Initialize( maOptions, mxCompFac );
    }

    return mxOne;
}

// ------------------------------------------------------------------------------
void SAL_CALL
SortedDynamicResultSet::setListener( const Reference< XDynamicResultSetListener >& Listener )
    throw( ListenerAlreadySetException, RuntimeException )
{
    osl::Guard< osl::Mutex > aGuard( maMutex );

    if ( mxListener.is() )
        throw ListenerAlreadySetException();

    addEventListener( Reference< XEventListener >::query( Listener ) );

    mxListener = Listener;

    if ( mxOriginal.is() )
        mxOriginal->setListener( mxOwnListener );
}

// ------------------------------------------------------------------------------
void SAL_CALL
SortedDynamicResultSet::connectToCache(
        const Reference< XDynamicResultSet > & xCache )
        throw( ListenerAlreadySetException,
               AlreadyInitializedException,
               ServiceNotFoundException,
               RuntimeException )
{
    if( mxListener.is() )
        throw ListenerAlreadySetException();

    if( mbStatic )
        throw ListenerAlreadySetException();

    Reference< XSourceInitialization > xTarget( xCache, UNO_QUERY );
    if( xTarget.is() && mxSMgr.is() )
    {
        Reference< XCachedDynamicResultSetStubFactory > xStubFactory;
        try
        {
            xStubFactory = Reference< XCachedDynamicResultSetStubFactory >(
                mxSMgr->createInstance(
                    OUString::createFromAscii(
                        "com.sun.star.ucb.CachedDynamicResultSetStubFactory" ) ),
                UNO_QUERY );
        }
        catch ( Exception const & )
        {
        }

        if( xStubFactory.is() )
        {
            xStubFactory->connectToCache(
                  this, xCache, Sequence< NumberedSortingInfo > (), NULL );
            return;
        }
    }
    throw ServiceNotFoundException();
}

// ------------------------------------------------------------------------------
sal_Int16 SAL_CALL
SortedDynamicResultSet::getCapabilities()
    throw( RuntimeException )
{
    osl::Guard< osl::Mutex > aGuard( maMutex );

    sal_Int16 nCaps = 0;

    if ( mxOriginal.is() )
        nCaps = mxOriginal->getCapabilities();

    nCaps |= ContentResultSetCapability::SORTED;

    return nCaps;
}

//--------------------------------------------------------------------------
// XDynamicResultSetListener methods.
// ------------------------------------------------------------------------------

/** In the first notify-call the listener gets the two
 <type>XResultSet</type>s and has to hold them. The <type>XResultSet</type>s
 are implementations of the service <type>ContentResultSet</type>.

 <p>The notified new <type>XResultSet</type> will stay valid after returning
 notification. The old one will become invalid after returning notification.

 <p>While in notify-call the listener is allowed to read old and new version,
 except in the first call, where only the new Resultset is valid.

 <p>The Listener is allowed to blockade this call, until he really want to go
 to the new version. The only situation, where the listener has to return the
 update call at once is, while he disposes his broadcaster or while he is
 removing himsef as listener (otherwise you deadlock)!!!
*/
void SAL_CALL
SortedDynamicResultSet::impl_notify( const ListEvent& Changes )
    throw( RuntimeException )
{
    osl::Guard< osl::Mutex > aGuard( maMutex );

    sal_Bool bHasNew = sal_False;
    sal_Bool bHasModified = sal_False;

    SortedResultSet *pCurSet = NULL;

    // mxNew und mxOld vertauschen und anschliessend die Tabellen von Old
    // nach New kopieren
    if ( mbGotWelcome )
    {
        if ( mbUseOne )
        {
            mbUseOne = sal_False;
            mpTwo->CopyData( mpOne );
            pCurSet = mpTwo;
        }
        else
        {
            mbUseOne = sal_True;
            mpOne->CopyData( mpTwo );
            pCurSet = mpOne;
        }
    }

    Any  aRet;

    try {
        aRet = pCurSet->getPropertyValue( OUString::createFromAscii( "IsRowCountFinal" ) );
    }
    catch ( UnknownPropertyException ) {}
    catch ( WrappedTargetException ) {}

    long nOldCount = pCurSet->GetCount();
    sal_Bool bWasFinal;

    aRet >>= bWasFinal;

    // handle the actions in the list
    for ( long i=0; i<Changes.Changes.getLength(); i++ )
    {
        const ListAction aAction = Changes.Changes[i];
        switch ( aAction.ListActionType )
        {
            case ListActionType::WELCOME:
                {
                    WelcomeDynamicResultSetStruct aWelcome;
                    if ( aAction.ActionInfo >>= aWelcome )
                    {
                        mpTwo = new SortedResultSet( aWelcome.Old );
                        mxTwo = mpTwo;
                        mpOne = new SortedResultSet( aWelcome.New );
                        mxOne = mpOne;
                        mpOne->Initialize( maOptions, mxCompFac );
                        mbGotWelcome = sal_True;
                        mbUseOne = sal_True;
                        pCurSet = mpOne;

                        aWelcome.Old = mxTwo;
                        aWelcome.New = mxOne;

                        ListAction *pWelcomeAction = new ListAction;
                        pWelcomeAction->ActionInfo <<= aWelcome;
                        pWelcomeAction->Position = 0;
                        pWelcomeAction->Count = 0;
                        pWelcomeAction->ListActionType = ListActionType::WELCOME;

                        maActions.Insert( pWelcomeAction );
                    }
                    else
                    {
                        // throw RuntimeException();
                    }
                    break;
                }
            case ListActionType::INSERTED:
                {
                    pCurSet->InsertNew( aAction.Position, aAction.Count );
                    bHasNew = sal_True;
                    break;
                }
            case ListActionType::REMOVED:
                {
                    pCurSet->Remove( aAction.Position,
                                     aAction.Count,
                                     &maActions );
                    break;
                }
            case ListActionType::MOVED:
                {
                    long nOffset;
                    if ( aAction.ActionInfo >>= nOffset )
                    {
                        pCurSet->Move( aAction.Position,
                                       aAction.Count,
                                       nOffset );
                    }
                    break;
                }
            case ListActionType::PROPERTIES_CHANGED:
                {
                    pCurSet->SetChanged( aAction.Position, aAction.Count );
                    bHasModified = sal_True;
                    break;
                }
            default: break;
        }
    }

    if ( bHasModified )
        pCurSet->ResortModified( &maActions );

    if ( bHasNew )
        pCurSet->ResortNew( &maActions );

    // send the new actions with a notify to the listeners
    SendNotify();

    // check for propertyChangeEvents
    pCurSet->CheckProperties( nOldCount, bWasFinal );
}

//-----------------------------------------------------------------
// XEventListener
//-----------------------------------------------------------------
void SAL_CALL
SortedDynamicResultSet::impl_disposing( const EventObject& Source )
    throw( RuntimeException )
{
    mxListener.clear();
    mxOriginal.clear();
}

// ------------------------------------------------------------------------------
// private methods
// ------------------------------------------------------------------------------
void SortedDynamicResultSet::SendNotify()
{
    long nCount = maActions.Count();

    if ( nCount && mxListener.is() )
    {
        Sequence< ListAction > aActionList( maActions.Count() );
        ListAction *pActionList = aActionList.getArray();

        for ( long i=0; i<nCount; i++ )
        {
            pActionList[ i ] = *(maActions.GetAction( i ));
        }

        ListEvent aNewEvent;
        aNewEvent.Changes = aActionList;

        mxListener->notify( aNewEvent );
    }

    // clean up
    maActions.Clear();
}

//=========================================================================
//
// SortedDynamicResultSetFactory
//
//=========================================================================
SortedDynamicResultSetFactory::SortedDynamicResultSetFactory(
                        const Reference< XMultiServiceFactory > & rSMgr )
{
    mxSMgr = rSMgr;
}

//--------------------------------------------------------------------------
SortedDynamicResultSetFactory::~SortedDynamicResultSetFactory()
{
}

//--------------------------------------------------------------------------
// XInterface methods.
//--------------------------------------------------------------------------

XINTERFACE_IMPL_3( SortedDynamicResultSetFactory,
                   XTypeProvider,
                   XServiceInfo,
                   XSortedDynamicResultSetFactory );

//--------------------------------------------------------------------------
// XTypeProvider methods.
//--------------------------------------------------------------------------

XTYPEPROVIDER_IMPL_3( SortedDynamicResultSetFactory,
                      XTypeProvider,
                         XServiceInfo,
                      XSortedDynamicResultSetFactory );

//--------------------------------------------------------------------------
// XServiceInfo methods.
//--------------------------------------------------------------------------

XSERVICEINFO_IMPL_1( SortedDynamicResultSetFactory,
                         OUString::createFromAscii(
                        "com.sun.star.comp.ucb.SortedDynamicResultSetFactory" ),
                         OUString::createFromAscii(
                         DYNAMIC_RESULTSET_FACTORY_NAME ) );

//--------------------------------------------------------------------------
// Service factory implementation.
//--------------------------------------------------------------------------

ONE_INSTANCE_SERVICE_FACTORY_IMPL( SortedDynamicResultSetFactory );

//--------------------------------------------------------------------------
// SortedDynamicResultSetFactory methods.
//--------------------------------------------------------------------------
Reference< XDynamicResultSet > SAL_CALL
SortedDynamicResultSetFactory::createSortedDynamicResultSet(
                const Reference< XDynamicResultSet > & Source,
                const Sequence< NumberedSortingInfo > & Info,
                const Reference< XAnyCompareFactory > & CompareFactory )
    throw( RuntimeException )
{
    Reference< XDynamicResultSet > xRet;
    xRet = new SortedDynamicResultSet( Source, Info, CompareFactory, mxSMgr );
    return xRet;
}

//=========================================================================
//
// EventList
//
//=========================================================================

void EventList::Clear()
{
    for ( std::deque< LISTACTION* >::size_type i = 0;
          i < maData.size(); ++i )
    {
        delete maData[i];
    }

    maData.clear();
}

//--------------------------------------------------------------------------
void EventList::AddEvent( long nType, long nPos, long nCount )
{
    ListAction *pAction = new ListAction;
    pAction->Position = nPos;
    pAction->Count = nCount;
    pAction->ListActionType = nType;

    Insert( pAction );
}

//=================================================================
//
// SortedDynamicResultSetListener
//
//=================================================================

SortedDynamicResultSetListener::SortedDynamicResultSetListener(
                                SortedDynamicResultSet *mOwner )
{
    mpOwner = mOwner;
}

//-----------------------------------------------------------------
SortedDynamicResultSetListener::~SortedDynamicResultSetListener()
{
}

//-----------------------------------------------------------------
// XInterface methods.
//-----------------------------------------------------------------

XINTERFACE_IMPL_2( SortedDynamicResultSetListener,
                   XEventListener,  /* base class of XDynamicResultSetListener */
                   XDynamicResultSetListener );

//-----------------------------------------------------------------
// XEventListener ( base of XDynamicResultSetListener )
//-----------------------------------------------------------------
void SAL_CALL
SortedDynamicResultSetListener::disposing( const EventObject& Source )
    throw( RuntimeException )
{
    osl::Guard< osl::Mutex > aGuard( maMutex );

    if ( mpOwner )
        mpOwner->impl_disposing( Source );
}

//-----------------------------------------------------------------
// XDynamicResultSetListener
//-----------------------------------------------------------------
void SAL_CALL
SortedDynamicResultSetListener::notify( const ListEvent& Changes )
    throw( RuntimeException )
{
    osl::Guard< osl::Mutex > aGuard( maMutex );

    if ( mpOwner )
        mpOwner->impl_notify( Changes );
}

//-----------------------------------------------------------------
// own methods:
//-----------------------------------------------------------------
void SAL_CALL
SortedDynamicResultSetListener::impl_OwnerDies()
{
    osl::Guard< osl::Mutex > aGuard( maMutex );
    mpOwner = NULL;
}