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 * OpenOffice.org - a multi-platform office productivity suite
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
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#include <com/sun/star/lang/DisposedException.hpp>
#include <cppuhelper/typeprovider.hxx>
#include <osl/diagnose.h>

#include "oseekinstream.hxx"
#include "owriteablestream.hxx"

using namespace ::com::sun::star;

OInputSeekStream::OInputSeekStream( OWriteStream_Impl& pImpl,
                                    uno::Reference < io::XInputStream > xStream,
                                    const uno::Sequence< beans::PropertyValue >& aProps,
                                    sal_Int32 nStorageType )
: OInputCompStream( pImpl, xStream, aProps, nStorageType )
{
    if ( m_xStream.is() )
    {
        m_xSeekable = uno::Reference< io::XSeekable >( m_xStream, uno::UNO_QUERY );
        OSL_ENSURE( m_xSeekable.is(), "No seeking support!\n" );
    }
}

OInputSeekStream::OInputSeekStream( uno::Reference < io::XInputStream > xStream,
                                    const uno::Sequence< beans::PropertyValue >& aProps,
                                    sal_Int32 nStorageType )
: OInputCompStream( xStream, aProps, nStorageType )
{
    if ( m_xStream.is() )
    {
        m_xSeekable = uno::Reference< io::XSeekable >( m_xStream, uno::UNO_QUERY );
        OSL_ENSURE( m_xSeekable.is(), "No seeking support!\n" );
    }
}

OInputSeekStream::~OInputSeekStream()
{
}

uno::Sequence< uno::Type > SAL_CALL OInputSeekStream::getTypes()
        throw ( uno::RuntimeException )
{
    static ::cppu::OTypeCollection* pTypeCollection = NULL ;

    if ( pTypeCollection == NULL )
    {
        ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() ) ;

        if ( pTypeCollection == NULL )
        {
            static ::cppu::OTypeCollection aTypeCollection(
                    ::getCppuType(( const uno::Reference< io::XSeekable >* )NULL ),
                    OInputCompStream::getTypes() );

            pTypeCollection = &aTypeCollection ;
        }
    }

    return pTypeCollection->getTypes() ;
}

uno::Any SAL_CALL OInputSeekStream::queryInterface( const uno::Type& rType )
        throw( uno::RuntimeException )
{
    // Attention:
    //  Don't use mutex or guard in this method!!! Is a method of XInterface.

    uno::Any aReturn( ::cppu::queryInterface( rType,
                                           static_cast< io::XSeekable* >( this ) ) );

    if ( aReturn.hasValue() == sal_True )
    {
        return aReturn ;
    }

    return OInputCompStream::queryInterface( rType ) ;
}

void SAL_CALL OInputSeekStream::acquire()
        throw()
{
    OInputCompStream::acquire();
}

void SAL_CALL OInputSeekStream::release()
        throw()
{
    OInputCompStream::release();
}


void SAL_CALL OInputSeekStream::seek( sal_Int64 location )
        throw ( lang::IllegalArgumentException,
                io::IOException,
                uno::RuntimeException )
{
    ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() );
    if ( m_bDisposed )
    {
        ::package::StaticAddLog( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX "Disposed!" ) ) );
        throw lang::DisposedException();
    }

    if ( !m_xSeekable.is() )
    {
        ::package::StaticAddLog( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX "No seekable!" ) ) );
        throw uno::RuntimeException();
    }

    m_xSeekable->seek( location );
}

sal_Int64 SAL_CALL OInputSeekStream::getPosition()
        throw ( io::IOException,
                uno::RuntimeException)
{
    ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() );
    if ( m_bDisposed )
    {
        ::package::StaticAddLog( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX "Disposed!" ) ) );
        throw lang::DisposedException();
    }

    if ( !m_xSeekable.is() )
    {
        ::package::StaticAddLog( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX "No seekable!" ) ) );
        throw uno::RuntimeException();
    }

    return m_xSeekable->getPosition();
}

sal_Int64 SAL_CALL OInputSeekStream::getLength()
        throw ( io::IOException,
                uno::RuntimeException )
{
    ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() );
    if ( m_bDisposed )
    {
        ::package::StaticAddLog( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX "Disposed!" ) ) );
        throw lang::DisposedException();
    }

    if ( !m_xSeekable.is() )
    {
        ::package::StaticAddLog( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX "No seekable!" ) ) );
        throw uno::RuntimeException();
    }

    return m_xSeekable->getLength();
}

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