    /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
    /*
     * This file is part of the LibreOffice project.
     *
     * This Source Code Form is subject to the terms of the Mozilla Public
     * License, v. 2.0. If a copy of the MPL was not distributed with this
     * file, You can obtain one at http://mozilla.org/MPL/2.0/.
     *
     * This file incorporates work covered by the following license notice:
     *
     *   Licensed to the Apache Software Foundation (ASF) under one or more
     *   contributor license agreements. See the NOTICE file distributed
     *   with this work for additional information regarding copyright
     *   ownership. The ASF licenses this file to you under the Apache
     *   License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
     */

    #include "ostreamcontainer.hxx"

    #include <cppuhelper/queryinterface.hxx>

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

    OFSStreamContainer::OFSStreamContainer( const uno::Reference < io::XStream >& xStream )
    : m_bDisposed( false )
    , m_bInputClosed( false )
    , m_bOutputClosed( false )
    , m_pTypeCollection( nullptr )
    {
        try
        {
            m_xStream = xStream;
            if ( !m_xStream.is() )
                throw uno::RuntimeException();

            m_xSeekable.set( xStream, uno::UNO_QUERY );
            m_xInputStream = xStream->getInputStream();
            m_xOutputStream = xStream->getOutputStream();
            m_xTruncate.set( m_xOutputStream, uno::UNO_QUERY );
            m_xAsyncOutputMonitor.set( m_xOutputStream, uno::UNO_QUERY );
        }
        catch( uno::Exception& )
        {
            m_xStream.clear();
            m_xSeekable.clear();
            m_xInputStream.clear();
            m_xOutputStream.clear();
            m_xTruncate.clear();
            m_xAsyncOutputMonitor.clear();
        }
    }

    OFSStreamContainer::~OFSStreamContainer()
    {
    }

    // XInterface
    uno::Any SAL_CALL OFSStreamContainer::queryInterface( const uno::Type& rType )
    {
        uno::Any aReturn;

        aReturn = ::cppu::queryInterface
                    (   rType
                        ,   static_cast<lang::XTypeProvider*> ( this )
                        ,   static_cast<io::XStream*> ( this )
                        ,   static_cast<embed::XExtendedStorageStream*> ( this )
                        ,   static_cast<lang::XComponent*> ( this ) );

        if ( aReturn.hasValue() )
            return aReturn ;

        if ( m_xSeekable.is() )
        {
            aReturn = ::cppu::queryInterface
                    (   rType
                        ,   static_cast<io::XSeekable*> ( this ) );

            if ( aReturn.hasValue() )
                return aReturn ;
        }

        if ( m_xInputStream.is() )
        {
            aReturn = ::cppu::queryInterface
                    (   rType
                        ,   static_cast<io::XInputStream*> ( this ) );

            if ( aReturn.hasValue() )
                return aReturn ;
        }
        if ( m_xOutputStream.is() )
        {
            aReturn = ::cppu::queryInterface
                    (   rType
                        ,   static_cast<io::XOutputStream*> ( this ) );

            if ( aReturn.hasValue() )
                return aReturn ;
        }
        if ( m_xTruncate.is() )
        {
            aReturn = ::cppu::queryInterface
                    (   rType
                        ,   static_cast<io::XTruncate*> ( this ) );

            if ( aReturn.hasValue() )
                return aReturn ;
        }
        if ( m_xAsyncOutputMonitor.is() )
        {
            aReturn = ::cppu::queryInterface
                    (   rType
                        ,   static_cast<io::XAsyncOutputMonitor*> ( this ) );

            if ( aReturn.hasValue() )
                return aReturn ;
        }

        return OWeakObject::queryInterface( rType );
    }

    void SAL_CALL OFSStreamContainer::acquire()
            throw()
    {
        OWeakObject::acquire();
    }

    void SAL_CALL OFSStreamContainer::release()
            throw()
    {
        OWeakObject::release();
    }

    //  XTypeProvider
    uno::Sequence< uno::Type > SAL_CALL OFSStreamContainer::getTypes()
    {
        if ( m_pTypeCollection == nullptr )
        {
            ::osl::MutexGuard aGuard( m_aMutex );

            if ( m_pTypeCollection == nullptr )
            {
                ::cppu::OTypeCollection aTypeCollection
                                        (   cppu::UnoType<lang::XTypeProvider>::get()
                                        ,   cppu::UnoType<embed::XExtendedStorageStream>::get());

                if ( m_xSeekable.is() )
                    aTypeCollection = ::cppu::OTypeCollection
                                        (   cppu::UnoType<io::XSeekable>::get(),
                                            aTypeCollection.getTypes() );
                if ( m_xInputStream.is() )
                    aTypeCollection = ::cppu::OTypeCollection
                                        (   cppu::UnoType<io::XInputStream>::get(),
                                            aTypeCollection.getTypes() );

                if ( m_xOutputStream.is() )
                    aTypeCollection = ::cppu::OTypeCollection
                                        (   cppu::UnoType<io::XOutputStream>::get(),
                                            aTypeCollection.getTypes() );
                if ( m_xTruncate.is() )
                    aTypeCollection = ::cppu::OTypeCollection
                                        (   cppu::UnoType<io::XTruncate>::get(),
                                            aTypeCollection.getTypes() );
                if ( m_xAsyncOutputMonitor.is() )
                    aTypeCollection = ::cppu::OTypeCollection
                                        (   cppu::UnoType<io::XAsyncOutputMonitor>::get(),
                                            aTypeCollection.getTypes() );

                m_pTypeCollection = new ::cppu::OTypeCollection( aTypeCollection );
            }
        }
        return m_pTypeCollection->getTypes() ;
    }

    uno::Sequence< sal_Int8 > SAL_CALL OFSStreamContainer::getImplementationId()
    {
        return css::uno::Sequence<sal_Int8>();
    }

    // XStream
    uno::Reference< io::XInputStream > SAL_CALL OFSStreamContainer::getInputStream()
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() )
            throw uno::RuntimeException();

        if ( m_xInputStream.is() )
            return uno::Reference< io::XInputStream >( static_cast< io::XInputStream* >( this ) );

        return uno::Reference< io::XInputStream >();
    }

    uno::Reference< io::XOutputStream > SAL_CALL OFSStreamContainer::getOutputStream()
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() )
            throw uno::RuntimeException();

        if ( m_xOutputStream.is() )
            return uno::Reference< io::XOutputStream >( static_cast< io::XOutputStream* >( this ) );

        return uno::Reference< io::XOutputStream >();
    }

    // XComponent
    void SAL_CALL OFSStreamContainer::dispose()
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() )
            throw uno::RuntimeException();

        if ( m_xInputStream.is() && !m_bInputClosed )
        {
            m_xInputStream->closeInput();
            m_bInputClosed = true;
        }

        if ( m_xOutputStream.is() && !m_bOutputClosed )
        {
            m_xOutputStream->closeOutput();
            m_bOutputClosed = true;
        }

        if ( m_pListenersContainer )
        {
            lang::EventObject aSource( static_cast< ::cppu::OWeakObject*>( this ) );
            m_pListenersContainer->disposeAndClear( aSource );
        }

        m_bDisposed = true;
    }

    void SAL_CALL OFSStreamContainer::addEventListener( const uno::Reference< lang::XEventListener >& xListener )
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_pListenersContainer )
            m_pListenersContainer.reset(new ::comphelper::OInterfaceContainerHelper2( m_aMutex ));

        m_pListenersContainer->addInterface( xListener );
    }

    void SAL_CALL OFSStreamContainer::removeEventListener( const uno::Reference< lang::XEventListener >& xListener )
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( m_pListenersContainer )
            m_pListenersContainer->removeInterface( xListener );
    }

    // XSeekable
    void SAL_CALL OFSStreamContainer::seek( sal_Int64 location )
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xSeekable.is() )
            throw uno::RuntimeException();

        m_xSeekable->seek( location );
    }

    sal_Int64 SAL_CALL OFSStreamContainer::getPosition()
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xSeekable.is() )
            throw uno::RuntimeException();

        return m_xSeekable->getPosition();
    }

    sal_Int64 SAL_CALL OFSStreamContainer::getLength()
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xSeekable.is() )
            throw uno::RuntimeException();

        return m_xSeekable->getLength();
    }

    // XInputStream
    sal_Int32 SAL_CALL OFSStreamContainer::readBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xInputStream.is() )
            throw uno::RuntimeException();

        return m_xInputStream->readBytes( aData, nBytesToRead );
    }

    sal_Int32 SAL_CALL OFSStreamContainer::readSomeBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xInputStream.is() )
            throw uno::RuntimeException();

        return m_xInputStream->readSomeBytes( aData, nMaxBytesToRead );
    }

    void SAL_CALL OFSStreamContainer::skipBytes( sal_Int32 nBytesToSkip )
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xInputStream.is() )
            throw uno::RuntimeException();

        m_xInputStream->skipBytes( nBytesToSkip );
    }

    sal_Int32 SAL_CALL OFSStreamContainer::available()
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xInputStream.is() )
            throw uno::RuntimeException();

        return m_xInputStream->available();
    }

    void SAL_CALL OFSStreamContainer::closeInput()
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xInputStream.is() )
            throw uno::RuntimeException();

        if ( m_xInputStream.is() )
        {
            m_xInputStream->closeInput();
            m_bInputClosed = true;
        }

        if ( m_bOutputClosed )
            dispose();
    }

    // XOutputStream
    void SAL_CALL OFSStreamContainer::writeBytes( const uno::Sequence< sal_Int8 >& aData )
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xOutputStream.is() )
            throw uno::RuntimeException();

        return m_xOutputStream->writeBytes( aData );
    }

    void SAL_CALL OFSStreamContainer::flush()
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xOutputStream.is() )
            throw uno::RuntimeException();

        return m_xOutputStream->flush();
    }

    void SAL_CALL OFSStreamContainer::closeOutput()
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xOutputStream.is() )
            throw uno::RuntimeException();

        if ( m_xOutputStream.is() )
        {
            m_xOutputStream->closeOutput();
            m_bOutputClosed = true;
        }

        if ( m_bInputClosed )
            dispose();
    }

    // XTruncate
    void SAL_CALL OFSStreamContainer::truncate()
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xTruncate.is() )
            throw uno::RuntimeException();

        m_xTruncate->truncate();
    }

    // XAsyncOutputMonitor
    void SAL_CALL OFSStreamContainer::waitForCompletion()
    {
        ::osl::MutexGuard aGuard( m_aMutex );

        if ( m_bDisposed )
            throw lang::DisposedException();

        if ( !m_xStream.is() || !m_xAsyncOutputMonitor.is() )
            throw uno::RuntimeException();

        m_xAsyncOutputMonitor->waitForCompletion();
    }

    /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

↑ V547 Expression 'm_pTypeCollection == nullptr' is always true.

↑ V773 The 'm_pTypeCollection' pointer was not released in destructor. A memory leak is possible.