AOO410/main/comphelper/inc/comphelper/seekableinput.hxx

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#ifndef _COMPHELPER_STREAM_SEEKABLEINPUT_HXX_
#define _COMPHELPER_STREAM_SEEKABLEINPUT_HXX_

#include <osl/mutex.hxx>
#include <com/sun/star/uno/Reference.hxx>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/io/XSeekable.hpp>
#include <cppuhelper/implbase2.hxx>
#include "comphelper/comphelperdllapi.h"

namespace comphelper
{

class COMPHELPER_DLLPUBLIC OSeekableInputWrapper : public ::cppu::WeakImplHelper2< ::com::sun::star::io::XInputStream,
																::com::sun::star::io::XSeekable >
{
	::osl::Mutex	m_aMutex;

	::com::sun::star::uno::Reference< ::com::sun::star::lang::XMultiServiceFactory > m_xFactory;
	
	::com::sun::star::uno::Reference< ::com::sun::star::io::XInputStream > m_xOriginalStream;

	::com::sun::star::uno::Reference< ::com::sun::star::io::XInputStream > m_xCopyInput;
	::com::sun::star::uno::Reference< ::com::sun::star::io::XSeekable > m_xCopySeek;

private:
	COMPHELPER_DLLPRIVATE void PrepareCopy_Impl();

public:
	OSeekableInputWrapper(
				const ::com::sun::star::uno::Reference< ::com::sun::star::io::XInputStream >& xInStream,
				const ::com::sun::star::uno::Reference< ::com::sun::star::lang::XMultiServiceFactory >& xFactory );

	virtual ~OSeekableInputWrapper();

	static ::com::sun::star::uno::Reference< ::com::sun::star::io::XInputStream > CheckSeekableCanWrap(
						const ::com::sun::star::uno::Reference< ::com::sun::star::io::XInputStream >& xInStream,
						const ::com::sun::star::uno::Reference< ::com::sun::star::lang::XMultiServiceFactory >& xFactory );

// XInputStream
    virtual sal_Int32 SAL_CALL readBytes( ::com::sun::star::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead ) throw (::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
    virtual sal_Int32 SAL_CALL readSomeBytes( ::com::sun::star::uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead ) throw (::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) throw (::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
    virtual sal_Int32 SAL_CALL available() throw (::com::sun::star::io::NotConnectedException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL closeInput() throw (::com::sun::star::io::NotConnectedException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);

// XSeekable
    virtual void SAL_CALL seek( sal_Int64 location ) throw (::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
    virtual sal_Int64 SAL_CALL getPosition() throw (::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
    virtual sal_Int64 SAL_CALL getLength() throw (::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);

};

}	// namespace comphelper

#endif