/* -*- 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 "oinputstreamcontainer.hxx"

#include <cppuhelper/typeprovider.hxx>

#include <cppuhelper/queryinterface.hxx>

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

OFSInputStreamContainer::OFSInputStreamContainer( const uno::Reference< io::XInputStream >& xStream )

: m_xInputStream( xStream )

, m_xSeekable( xStream, uno::UNO_QUERY )

, m_bSeekable( false )

, m_bDisposed( false )

{

    m_bSeekable = m_xSeekable.is();

}

OFSInputStreamContainer::~OFSInputStreamContainer()

{

}

uno::Sequence< uno::Type > SAL_CALL OFSInputStreamContainer::getTypes()

{

    if (m_bSeekable)

    {

        static cppu::OTypeCollection aTypeCollection(cppu::UnoType<io::XStream>::get(),

                                                     cppu::UnoType<io::XInputStream>::get(),

                                                     cppu::UnoType<io::XSeekable>::get());

        return aTypeCollection.getTypes();

    }

    else

    {

        static cppu::OTypeCollection aTypeCollection(cppu::UnoType<io::XStream>::get(),

                                                     cppu::UnoType<io::XInputStream>::get());

        return aTypeCollection.getTypes();

    }

}

uno::Any SAL_CALL OFSInputStreamContainer::queryInterface( const uno::Type& rType )

{

    // Attention:

    //  Don't use mutex or guard in this method!!! Is a method of XInterface.

    uno::Any aReturn;

    if ( m_bSeekable )

        aReturn = ::cppu::queryInterface( rType,

                                           static_cast< io::XStream* >( this ),

                                           static_cast< io::XInputStream* >( this ),

                                           static_cast< io::XSeekable* >( this ) );

    else

        aReturn = ::cppu::queryInterface( rType,

                                           static_cast< io::XStream* >( this ),

                                           static_cast< io::XInputStream* >( this ) );

    if ( aReturn.hasValue() )

        return aReturn ;

    return ::cppu::OWeakObject::queryInterface( rType ) ;

}

void SAL_CALL OFSInputStreamContainer::acquire()

        noexcept

{

    ::cppu::OWeakObject::acquire();

}

void SAL_CALL OFSInputStreamContainer::release()

        noexcept

{

    ::cppu::OWeakObject::release();

}

sal_Int32 SAL_CALL OFSInputStreamContainer::readBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )

{

    std::scoped_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        throw lang::DisposedException();

    if ( !m_xInputStream.is() )

        throw uno::RuntimeException();

    return m_xInputStream->readBytes( aData, nBytesToRead );

}

sal_Int32 SAL_CALL OFSInputStreamContainer::readSomeBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )

{

    std::scoped_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        throw lang::DisposedException();

    if ( !m_xInputStream.is() )

        throw uno::RuntimeException();

    return m_xInputStream->readSomeBytes( aData, nMaxBytesToRead );

}

void SAL_CALL OFSInputStreamContainer::skipBytes( sal_Int32 nBytesToSkip )

{

    std::scoped_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        throw lang::DisposedException();

    if ( !m_xInputStream.is() )

        throw uno::RuntimeException();

    m_xInputStream->skipBytes( nBytesToSkip );

}

sal_Int32 SAL_CALL OFSInputStreamContainer::available(  )

{

    std::scoped_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        throw lang::DisposedException();

    if ( !m_xInputStream.is() )

        throw uno::RuntimeException();

    return m_xInputStream->available();

}

void SAL_CALL OFSInputStreamContainer::closeInput(  )

{

    {

        std::scoped_lock aGuard( m_aMutex );

        if ( m_bDisposed )

            throw lang::DisposedException();

        if ( !m_xInputStream.is() )

            throw uno::RuntimeException();

    }

    dispose();

}

uno::Reference< io::XInputStream > SAL_CALL OFSInputStreamContainer::getInputStream()

{

    std::scoped_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        throw lang::DisposedException();

    if ( !m_xInputStream.is() )

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

    return this;

}

uno::Reference< io::XOutputStream > SAL_CALL OFSInputStreamContainer::getOutputStream()

{

    std::scoped_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        throw lang::DisposedException();

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

}

void SAL_CALL OFSInputStreamContainer::seek( sal_Int64 location )

{

    std::scoped_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        throw lang::DisposedException();

    if ( !m_xSeekable.is() )

        throw uno::RuntimeException();

    m_xSeekable->seek( location );

}

sal_Int64 SAL_CALL OFSInputStreamContainer::getPosition()

{

    std::scoped_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        throw lang::DisposedException();

    if ( !m_xSeekable.is() )

        throw uno::RuntimeException();

    return m_xSeekable->getPosition();

}

sal_Int64 SAL_CALL OFSInputStreamContainer::getLength()

{

    std::scoped_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        throw lang::DisposedException();

    if ( !m_xSeekable.is() )

        throw uno::RuntimeException();

    return m_xSeekable->getLength();

}

void SAL_CALL OFSInputStreamContainer::dispose(  )

{

    std::unique_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        return;

    if ( !m_xInputStream.is() )

        throw uno::RuntimeException();

    m_xInputStream->closeInput();

    lang::EventObject aSource( getXWeak() );

    m_aListenersContainer.disposeAndClear( aGuard, aSource );

    m_bDisposed = true;

}

void SAL_CALL OFSInputStreamContainer::addEventListener( const uno::Reference< lang::XEventListener >& xListener )

{

    std::unique_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        throw lang::DisposedException();

    m_aListenersContainer.addInterface( aGuard, xListener );

}

void SAL_CALL OFSInputStreamContainer::removeEventListener( const uno::Reference< lang::XEventListener >& xListener )

{

    std::unique_lock aGuard( m_aMutex );

    if ( m_bDisposed )

        throw lang::DisposedException();

    m_aListenersContainer.removeInterface( aGuard, xListener );

}

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