/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: wrapstreamforshare.cxx,v $
 *
 *  $Revision: 1.5 $
 *
 *  last change: $Author: hr $ $Date: 2006-06-20 06:15:02 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 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
 *
 ************************************************************************/

#ifndef _OSL_DIAGNOSE_H_
#include <osl/diagnose.h>
#endif

#include "wrapstreamforshare.hxx"

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


WrapStreamForShare::WrapStreamForShare( const uno::Reference< io::XInputStream >& xInStream,
                                        const SotMutexHolderRef& rMutexRef )
: m_rMutexRef( rMutexRef )
, m_xInStream( xInStream )
, m_nCurPos( 0 )
{
    m_xSeekable = uno::Reference< io::XSeekable >( m_xInStream, uno::UNO_QUERY );
    if ( !m_rMutexRef.Is() || !m_xInStream.is() || !m_xSeekable.is() )
    {
        OSL_ENSURE( sal_False, "Wrong initialization of wrapping stream!\n" );
        throw uno::RuntimeException();
    }
}

WrapStreamForShare::~WrapStreamForShare()
{
}

// XInputStream
sal_Int32 SAL_CALL WrapStreamForShare::readBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
        throw ( io::NotConnectedException,
                io::BufferSizeExceededException,
                io::IOException,
                uno::RuntimeException )
{
    ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() );

    if ( !m_xInStream.is() )
        throw io::IOException(); // TODO

    m_xSeekable->seek( m_nCurPos );

    sal_Int32 nRead = m_xInStream->readBytes( aData, nBytesToRead );
    m_nCurPos += nRead;

    return nRead;
}

sal_Int32 SAL_CALL WrapStreamForShare::readSomeBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
        throw ( io::NotConnectedException,
                io::BufferSizeExceededException,
                io::IOException,
                uno::RuntimeException )
{
    ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() );

    if ( !m_xInStream.is() )
        throw io::IOException(); // TODO

    m_xSeekable->seek( m_nCurPos );

    sal_Int32 nRead = m_xInStream->readSomeBytes( aData, nMaxBytesToRead );
    m_nCurPos += nRead;

    return nRead;
}

void SAL_CALL WrapStreamForShare::skipBytes( sal_Int32 nBytesToSkip )
        throw ( io::NotConnectedException,
                io::BufferSizeExceededException,
                io::IOException,
                uno::RuntimeException )
{
    ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() );

    if ( !m_xInStream.is() )
        throw io::IOException(); // TODO

    m_xSeekable->seek( m_nCurPos );

    m_xInStream->skipBytes( nBytesToSkip );
    m_nCurPos = m_xSeekable->getPosition();
}

sal_Int32 SAL_CALL WrapStreamForShare::available()
        throw ( io::NotConnectedException,
                io::IOException,
                uno::RuntimeException )
{
    ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() );

    if ( !m_xInStream.is() )
        throw io::IOException(); // TODO

    return m_xInStream->available();
}

void SAL_CALL WrapStreamForShare::closeInput()
        throw ( io::NotConnectedException,
                io::IOException,
                uno::RuntimeException )
{
    ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() );

    if ( !m_xInStream.is() )
        throw io::IOException(); // TODO

    // the package is the owner so it will close the stream
    // m_xInStream->closeInput();
    m_xInStream = uno::Reference< io::XInputStream >();
    m_xSeekable = uno::Reference< io::XSeekable >();
}

// XSeekable
void SAL_CALL WrapStreamForShare::seek( sal_Int64 location )
        throw ( lang::IllegalArgumentException,
                io::IOException,
                uno::RuntimeException )
{
    ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() );

    if ( !m_xInStream.is() )
        throw io::IOException(); // TODO

    // let stream implementation do all the checking
    m_xSeekable->seek( location );

    m_nCurPos = m_xSeekable->getPosition();
}

sal_Int64 SAL_CALL WrapStreamForShare::getPosition()
        throw ( io::IOException,
                uno::RuntimeException)
{
    ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() );

    if ( !m_xInStream.is() )
        throw io::IOException(); // TODO

    return m_nCurPos;
}

sal_Int64 SAL_CALL WrapStreamForShare::getLength()
        throw ( io::IOException,
                uno::RuntimeException )
{
    ::osl::MutexGuard aGuard( m_rMutexRef->GetMutex() );

    if ( !m_xInStream.is() )
        throw io::IOException(); // TODO

    return m_xSeekable->getLength();
}