package/source/xstor/oseekinstream.cxx

   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
  20 #include <com/sun/star/lang/DisposedException.hpp>
  21 #include <cppuhelper/typeprovider.hxx>
  22 #include <cppuhelper/queryinterface.hxx>
  23 #include <osl/diagnose.h>
  24
  25 #include "oseekinstream.hxx"
  26 #include "owriteablestream.hxx"
  27
  28 using namespace ::com::sun::star;
  29
  30 OInputSeekStream::OInputSeekStream( OWriteStream_Impl& pImpl,
  31                                     uno::Reference < io::XInputStream > const & xStream,
  32                                     const uno::Sequence< beans::PropertyValue >& aProps,
  33                                     sal_Int32 nStorageType )
  34 : OInputCompStream( pImpl, xStream, aProps, nStorageType )
  35 {
  36     m_xSeekable.set( m_xStream, uno::UNO_QUERY );
  37     OSL_ENSURE( m_xSeekable.is(), "No seeking support!" );
  38 }
  39
  40 OInputSeekStream::OInputSeekStream( uno::Reference < io::XInputStream > const & xStream,
  41                                     const uno::Sequence< beans::PropertyValue >& aProps,
  42                                     sal_Int32 nStorageType )
  43 : OInputCompStream( xStream, aProps, nStorageType )
  44 {
  45     m_xSeekable.set( m_xStream, uno::UNO_QUERY );
  46     OSL_ENSURE( m_xSeekable.is(), "No seeking support!" );
  47 }
  48
  49 OInputSeekStream::~OInputSeekStream()
  50 {
  51 }
  52
  53 uno::Sequence< uno::Type > SAL_CALL OInputSeekStream::getTypes()
  54 {
  55     static ::cppu::OTypeCollection* pTypeCollection = nullptr ;
  56
  57     if ( pTypeCollection == nullptr )
  58     {
  59         ::osl::MutexGuard aGuard( m_xMutex->GetMutex() ) ;
  60
  61         if ( pTypeCollection == nullptr )
  62         {
  63             static ::cppu::OTypeCollection aTypeCollection(
  64                     cppu::UnoType<io::XSeekable>::get(),
  65                     OInputCompStream::getTypes() );
  66
  67             pTypeCollection = &aTypeCollection ;
  68         }
  69     }
  70
  71     return pTypeCollection->getTypes() ;
  72 }
  73
  74 uno::Any SAL_CALL OInputSeekStream::queryInterface( const uno::Type& rType )
  75 {
  76     // Attention:
  77     //  Don't use mutex or guard in this method!!! Is a method of XInterface.
  78
  79     uno::Any aReturn( ::cppu::queryInterface( rType,
  80                                            static_cast< io::XSeekable* >( this ) ) );
  81
  82     if ( aReturn.hasValue() )
  83     {
  84         return aReturn ;
  85     }
  86
  87     return OInputCompStream::queryInterface( rType ) ;
  88 }
  89
  90 void SAL_CALL OInputSeekStream::acquire()
  91         throw()
  92 {
  93     OInputCompStream::acquire();
  94 }
  95
  96 void SAL_CALL OInputSeekStream::release()
  97         throw()
  98 {
  99     OInputCompStream::release();
 100 }
 101
 102 void SAL_CALL OInputSeekStream::seek( sal_Int64 location )
 103 {
 104     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 105     if ( m_bDisposed )
 106     {
 107         SAL_INFO("package.xstor", "Disposed!");
 108         throw lang::DisposedException();
 109     }
 110
 111     if ( !m_xSeekable.is() )
 112     {
 113         SAL_INFO("package.xstor", "No seekable!");
 114         throw uno::RuntimeException();
 115     }
 116
 117     m_xSeekable->seek( location );
 118 }
 119
 120 sal_Int64 SAL_CALL OInputSeekStream::getPosition()
 121 {
 122     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 123     if ( m_bDisposed )
 124     {
 125         SAL_INFO("package.xstor", "Disposed!");
 126         throw lang::DisposedException();
 127     }
 128
 129     if ( !m_xSeekable.is() )
 130     {
 131         SAL_INFO("package.xstor", "No seekable!");
 132         throw uno::RuntimeException();
 133     }
 134
 135     return m_xSeekable->getPosition();
 136 }
 137
 138 sal_Int64 SAL_CALL OInputSeekStream::getLength()
 139 {
 140     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 141     if ( m_bDisposed )
 142     {
 143         SAL_INFO("package.xstor", "Disposed!");
 144         throw lang::DisposedException();
 145     }
 146
 147     if ( !m_xSeekable.is() )
 148     {
 149         SAL_INFO("package.xstor", "No seekable!");
 150         throw uno::RuntimeException();
 151     }
 152
 153     return m_xSeekable->getLength();
 154 }
 155
 156 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */