package/source/xstor/switchpersistencestream.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19 #ifndef INCLUDED_PACKAGE_SOURCE_XSTOR_SWITCHPERSISTENCESTREAM_HXX
  20 #define INCLUDED_PACKAGE_SOURCE_XSTOR_SWITCHPERSISTENCESTREAM_HXX
  21
  22 #include <com/sun/star/uno/Sequence.hxx>
  23 #include <com/sun/star/uno/Reference.hxx>
  24 #include <com/sun/star/uno/XComponentContext.hpp>
  25 #include <com/sun/star/io/XInputStream.hpp>
  26 #include <com/sun/star/io/XOutputStream.hpp>
  27 #include <com/sun/star/io/XSeekable.hpp>
  28 #include <com/sun/star/io/XTruncate.hpp>
  29 #include <com/sun/star/io/XStream.hpp>
  30 #include <com/sun/star/io/XAsyncOutputMonitor.hpp>
  31 #include <mutex>
  32 #include <cppuhelper/implbase.hxx>
  33
  34 // SwitchablePersistenceStream
  35
  36 // Allows to switch the stream persistence on the fly. The target
  37 // stream ( if not filled by the implementation ) MUST have the same
  38 // size as the original one!
  39
  40 struct SPStreamData_Impl;
  41 class SwitchablePersistenceStream
  42         : public ::cppu::WeakImplHelper <
  43                                         css::io::XStream,
  44                                         css::io::XInputStream,
  45                                         css::io::XOutputStream,
  46                                         css::io::XTruncate,
  47                                         css::io::XSeekable,
  48                                         css::io::XAsyncOutputMonitor >
  49 {
  50     std::mutex    m_aMutex;
  51
  52     std::unique_ptr<SPStreamData_Impl> m_pStreamData;
  53
  54     void CloseAll_Impl();
  55
  56 public:
  57
  58     SwitchablePersistenceStream(
  59         const css::uno::Reference< css::io::XStream >& xStream );
  60
  61     SwitchablePersistenceStream(
  62         const css::uno::Reference< css::io::XInputStream >& xInStream );
  63
  64     virtual ~SwitchablePersistenceStream() override;
  65
  66     void SwitchPersistenceTo( const css::uno::Reference< css::io::XStream >& xStream );
  67
  68     void SwitchPersistenceTo( const css::uno::Reference< css::io::XInputStream >& xInputStream );
  69
  70     void CopyAndSwitchPersistenceTo( const css::uno::Reference< css::io::XStream >& xStream );
  71
  72 // css::io::XStream
  73     virtual css::uno::Reference< css::io::XInputStream > SAL_CALL getInputStream(  ) override;
  74     virtual css::uno::Reference< css::io::XOutputStream > SAL_CALL getOutputStream(  ) override;
  75
  76 // css::io::XInputStream
  77     virtual ::sal_Int32 SAL_CALL readBytes( css::uno::Sequence< ::sal_Int8 >& aData, ::sal_Int32 nBytesToRead ) override;
  78     virtual ::sal_Int32 SAL_CALL readSomeBytes( css::uno::Sequence< ::sal_Int8 >& aData, ::sal_Int32 nMaxBytesToRead ) override;
  79     virtual void SAL_CALL skipBytes( ::sal_Int32 nBytesToSkip ) override;
  80     virtual ::sal_Int32 SAL_CALL available(  ) override;
  81     virtual void SAL_CALL closeInput(  ) override;
  82
  83 // css::io::XOutputStream
  84     virtual void SAL_CALL writeBytes( const css::uno::Sequence< ::sal_Int8 >& aData ) override;
  85     virtual void SAL_CALL flush(  ) override;
  86     virtual void SAL_CALL closeOutput(  ) override;
  87
  88 // css::io::XTruncate
  89     virtual void SAL_CALL truncate(  ) override;
  90
  91 // css::io::XSeekable
  92     virtual void SAL_CALL seek( ::sal_Int64 location ) override;
  93     virtual ::sal_Int64 SAL_CALL getPosition(  ) override;
  94     virtual ::sal_Int64 SAL_CALL getLength(  ) override;
  95
  96 // css::io::XAsyncOutputMonitor
  97     virtual void SAL_CALL waitForCompletion(  ) override;
  98
  99 };
 100
 101 #endif // INCLUDED_PACKAGE_SOURCE_XSTOR_SWITCHPERSISTENCESTREAM_HXX
 102
 103 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */