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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * <http://www.openoffice.org/license.html>
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/**************************************************************************
                                TODO
 **************************************************************************

 *************************************************************************/

#include <vector>

#include "ucbhelper/contentidentifier.hxx"
#include "ucbhelper/providerhelper.hxx"

#include "myucp_datasupplier.hxx"
#include "myucp_content.hxx"

using namespace com::sun::star;

// @@@ Adjust namespace name.
namespace myucp
{

//=========================================================================
//
// struct ResultListEntry.
//
//=========================================================================

struct ResultListEntry
{
    rtl::OUString                             aId;
    uno::Reference< ucb::XContentIdentifier > xId;
    uno::Reference< ucb::XContent >           xContent;
    uno::Reference< sdbc::XRow >              xRow;
    const ContentProperties&                  rData;

    ResultListEntry( const ContentProperties& rEntry ) : rData( rEntry ) {}
};

//=========================================================================
//
// ResultList.
//
//=========================================================================

typedef std::vector< ResultListEntry* > ResultList;

//=========================================================================
//
// struct DataSupplier_Impl.
//
//=========================================================================

struct DataSupplier_Impl
{
    osl::Mutex                                   m_aMutex;
    ResultList                                   m_aResults;
    rtl::Reference< Content >                    m_xContent;
    uno::Reference< lang::XMultiServiceFactory > m_xSMgr;
// @@@ The data source and an iterator for it
//  Entry                                        m_aFolder;
//  Entry::iterator                              m_aIterator;
      sal_Int32                                  m_nOpenMode;
      sal_Bool                                   m_bCountFinal;

    DataSupplier_Impl( const uno::Reference< lang::XMultiServiceFactory >& rxSMgr,
                       const rtl::Reference< Content >& rContent,
                       sal_Int32 nOpenMode )
    : m_xContent( rContent ), m_xSMgr( rxSMgr ),
//    m_aFolder( rxSMgr, rContent->getIdentifier()->getContentIdentifier() ),
      m_nOpenMode( nOpenMode ), m_bCountFinal( sal_False ) {}
    ~DataSupplier_Impl();
};

//=========================================================================
DataSupplier_Impl::~DataSupplier_Impl()
{
    ResultList::const_iterator it  = m_aResults.begin();
    ResultList::const_iterator end = m_aResults.end();

    while ( it != end )
    {
        delete (*it);
        ++it;
    }
}

//=========================================================================
//=========================================================================
//
// DataSupplier Implementation.
//
//=========================================================================
//=========================================================================

DataSupplier::DataSupplier( const uno::Reference< lang::XMultiServiceFactory >& rxSMgr,
                            const rtl::Reference< Content >& rContent,
                            sal_Int32 nOpenMode )
: m_pImpl( new DataSupplier_Impl( rxSMgr, rContent, nOpenMode ) )
{
}

//=========================================================================
// virtual
DataSupplier::~DataSupplier()
{
    delete m_pImpl;
}

//=========================================================================
// virtual
rtl::OUString DataSupplier::queryContentIdentifierString( sal_uInt32 nIndex )
{
    osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

    if ( nIndex < m_pImpl->m_aResults.size() )
    {
        rtl::OUString aId = m_pImpl->m_aResults[ nIndex ]->aId;
        if ( aId.getLength() )
        {
            // Already cached.
            return aId;
        }
    }

    if ( getResult( nIndex ) )
    {
        rtl::OUString aId
            = m_pImpl->m_xContent->getIdentifier()->getContentIdentifier();

        aId += m_pImpl->m_aResults[ nIndex ]->rData.aTitle;

        m_pImpl->m_aResults[ nIndex ]->aId = aId;
        return aId;
    }
    return rtl::OUString();
}

//=========================================================================
// virtual
uno::Reference< ucb::XContentIdentifier >
DataSupplier::queryContentIdentifier( sal_uInt32 nIndex )
{
    osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

    if ( nIndex < m_pImpl->m_aResults.size() )
    {
        uno::Reference< ucb::XContentIdentifier > xId
                                = m_pImpl->m_aResults[ nIndex ]->xId;
        if ( xId.is() )
        {
            // Already cached.
            return xId;
        }
    }

    rtl::OUString aId = queryContentIdentifierString( nIndex );
    if ( aId.getLength() )
    {
        uno::Reference< ucb::XContentIdentifier > xId
            = new ::ucbhelper::ContentIdentifier( aId );
        m_pImpl->m_aResults[ nIndex ]->xId = xId;
        return xId;
    }
    return uno::Reference< ucb::XContentIdentifier >();
}

//=========================================================================
// virtual
uno::Reference< ucb::XContent >
DataSupplier::queryContent( sal_uInt32 nIndex )
{
    osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

    if ( nIndex < m_pImpl->m_aResults.size() )
    {
        uno::Reference< ucb::XContent > xContent
                                = m_pImpl->m_aResults[ nIndex ]->xContent;
        if ( xContent.is() )
        {
            // Already cached.
            return xContent;
        }
    }

    uno::Reference< ucb::XContentIdentifier > xId
        = queryContentIdentifier( nIndex );
    if ( xId.is() )
    {
        try
        {
            uno::Reference< ucb::XContent > xContent
                = m_pImpl->m_xContent->getProvider()->queryContent( xId );
            m_pImpl->m_aResults[ nIndex ]->xContent = xContent;
            return xContent;

        }
        catch ( ucb::IllegalIdentifierException& )
        {
        }
    }
    return uno::Reference< ucb::XContent >();
}

//=========================================================================
// virtual
sal_Bool DataSupplier::getResult( sal_uInt32 nIndex )
{
    osl::ClearableGuard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

    if ( m_pImpl->m_aResults.size() > nIndex )
    {
        // Result already present.
        return sal_True;
    }

    // Result not (yet) present.

    if ( m_pImpl->m_bCountFinal )
        return sal_False;

    // Try to obtain result...

    sal_uInt32 nOldCount = m_pImpl->m_aResults.size();
    sal_Bool bFound = sal_False;

    // @@@ Obtain data and put it into result list...
/*
    sal_uInt32 nPos = nOldCount;
    while ( m_pImpl->m_aFolder.next( m_pImpl->m_aIterator ) )
    {
        m_pImpl->m_aResults.push_back(
                        new ResultListEntry( *m_pImpl->m_aIterator ) );

        if ( nPos == nIndex )
        {
            // Result obtained.
            bFound = sal_True;
            break;
        }

        nPos++;
    }
*/

    if ( !bFound )
        m_pImpl->m_bCountFinal = sal_True;

    rtl::Reference< ::ucbhelper::ResultSet > xResultSet = getResultSet().get();
    if ( xResultSet.is() )
    {
        // Callbacks follow!
        aGuard.clear();

        if ( nOldCount < m_pImpl->m_aResults.size() )
            xResultSet->rowCountChanged(
                                    nOldCount, m_pImpl->m_aResults.size() );

        if ( m_pImpl->m_bCountFinal )
            xResultSet->rowCountFinal();
    }

    return bFound;
}

//=========================================================================
// virtual
sal_uInt32 DataSupplier::totalCount()
{
    osl::ClearableGuard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

    if ( m_pImpl->m_bCountFinal )
        return m_pImpl->m_aResults.size();

    sal_uInt32 nOldCount = m_pImpl->m_aResults.size();

    // @@@ Obtain data and put it into result list...
/*
    while ( m_pImpl->m_aFolder.next( m_pImpl->m_aIterator ) )
        m_pImpl->m_aResults.push_back(
                        new ResultListEntry( *m_pImpl->m_aIterator ) );
*/
    m_pImpl->m_bCountFinal = sal_True;

    rtl::Reference< ::ucbhelper::ResultSet > xResultSet = getResultSet().get();
    if ( xResultSet.is() )
    {
        // Callbacks follow!
        aGuard.clear();

        if ( nOldCount < m_pImpl->m_aResults.size() )
            xResultSet->rowCountChanged(
                                    nOldCount, m_pImpl->m_aResults.size() );

        xResultSet->rowCountFinal();
    }

    return m_pImpl->m_aResults.size();
}

//=========================================================================
// virtual
sal_uInt32 DataSupplier::currentCount()
{
    return m_pImpl->m_aResults.size();
}

//=========================================================================
// virtual
sal_Bool DataSupplier::isCountFinal()
{
    return m_pImpl->m_bCountFinal;
}

//=========================================================================
// virtual
uno::Reference< sdbc::XRow >
DataSupplier::queryPropertyValues( sal_uInt32 nIndex  )
{
    osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

    if ( nIndex < m_pImpl->m_aResults.size() )
    {
        uno::Reference< sdbc::XRow > xRow = m_pImpl->m_aResults[ nIndex ]->xRow;
        if ( xRow.is() )
        {
            // Already cached.
            return xRow;
        }
    }

    if ( getResult( nIndex ) )
    {
        uno::Reference< sdbc::XRow > xRow = Content::getPropertyValues(
                                    m_pImpl->m_xSMgr,
                                    getResultSet()->getProperties(),
                                    m_pImpl->m_aResults[ nIndex ]->rData,
                                    m_pImpl->m_xContent->getProvider().get(),
                                    queryContentIdentifierString( nIndex ) );
        m_pImpl->m_aResults[ nIndex ]->xRow = xRow;
        return xRow;
    }

    return uno::Reference< sdbc::XRow >();
}

//=========================================================================
// virtual
void DataSupplier::releasePropertyValues( sal_uInt32 nIndex )
{
    osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

    if ( nIndex < m_pImpl->m_aResults.size() )
        m_pImpl->m_aResults[ nIndex ]->xRow = uno::Reference< sdbc::XRow >();
}

//=========================================================================
// virtual
void DataSupplier::close()
{
}

//=========================================================================
// virtual
void DataSupplier::validate()
    throw( ucb::ResultSetException )
{
}

} // namespace

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