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/* -*- 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 .
*/
#ifndef _PSTM_HXX
#define _PSTM_HXX
#include <boost/unordered_map.hpp>
#include "tools/toolsdllapi.h"
#include <tools/unqidx.hxx>
#include <tools/ref.hxx>
#include <tools/rtti.hxx>
#include <tools/stream.hxx>
#include <map>
#define ERRCODE_IO_NOFACTORY ERRCODE_IO_WRONGFORMAT
/*************************************************************************
*************************************************************************/
class SvPersistBase;
typedef void * (*SvCreateInstancePersist)( SvPersistBase ** );
#define SV_CLASS_REGISTER( Class ) \
Register( Class::StaticClassId(), Class::CreateInstance )
class TOOLS_DLLPUBLIC SvClassManager
{
typedef boost::unordered_map<sal_Int32, SvCreateInstancePersist> Map;
Map aAssocTable;
public:
void Register( sal_Int32 nClassId, SvCreateInstancePersist pFunc );
SvCreateInstancePersist Get( sal_Int32 nClassId );
};
/************************** S v R t t i B a s e **************************/
class TOOLS_DLLPUBLIC SvRttiBase : public SvRefBase
{
public:
TYPEINFO();
};
SV_DECL_IMPL_REF(SvRttiBase)
/*************************************************************************/
#define SV_DECL_PERSIST( Class, CLASS_ID ) \
TYPEINFO(); \
static sal_Int32 StaticClassId() { return CLASS_ID; } \
static void * CreateInstance( SvPersistBase ** ppBase ); \
friend SvPersistStream& operator >> ( SvPersistStream & rStm, \
Class *& rpObj); \
virtual sal_Int32 GetClassId() const; \
virtual void Load( SvPersistStream & ); \
virtual void Save( SvPersistStream & );
#define SV_DECL_PERSIST1( Class, Super1, CLASS_ID ) \
SV_DECL_PERSIST( Class, CLASS_ID )
#define PRV_SV_IMPL_PERSIST( Class ) \
void * Class::CreateInstance( SvPersistBase ** ppBase )\
{ \
Class * p = new Class(); \
*ppBase = p; \
return p; \
} \
sal_Int32 Class::GetClassId() const \
{ return StaticClassId(); } \
SvPersistStream& operator >> (SvPersistStream & rStm, Class *& rpObj)\
{ \
SvPersistBase * pObj; \
rStm >> pObj; \
rpObj = PTR_CAST( Class, pObj ); \
return rStm; \
}
#define SV_IMPL_PERSIST1( Class, Super1 ) \
TYPEINIT1( Class, Super1 ) \
PRV_SV_IMPL_PERSIST( Class )
/*************************************************************************/
class SvPersistStream;
class SvPersistBase : public SvRttiBase
{
public:
virtual sal_Int32 GetClassId() const = 0;
virtual void Load( SvPersistStream & ) = 0;
virtual void Save( SvPersistStream & ) = 0;
TOOLS_DLLPUBLIC friend SvPersistStream& operator >> ( SvPersistStream & rStm,
SvPersistBase *& rpObj );
};
SV_DECL_IMPL_REF(SvPersistBase)
/*************************************************************************/
// Damit die Liste, anders benannt wird
typedef SvPersistBase SuperSvPersistBase;
SV_DECL_REF_LIST_VISIBILITY(SuperSvPersistBase,SuperSvPersistBase*,TOOLS_DLLPUBLIC)
SV_IMPL_REF_LIST(SuperSvPersistBase,SuperSvPersistBase*)
class TOOLS_DLLPUBLIC SvPersistBaseMemberList : public SuperSvPersistBaseMemberList
{
public:
SvPersistBaseMemberList();
void WriteObjects( SvPersistStream &, sal_Bool bOnlyStreamedObj = sal_False ) const;
TOOLS_DLLPUBLIC friend SvPersistStream& operator << (SvPersistStream &, const SvPersistBaseMemberList &);
TOOLS_DLLPUBLIC friend SvPersistStream& operator >> (SvPersistStream &, SvPersistBaseMemberList &);
};
/*************************************************************************/
#define SV_DECL_PERSIST_LIST(ClassName,EntryName)\
class ClassName##MemberList : public SvPersistBaseMemberList\
{\
public:\
PRV_SV_DECL_MEMBER_LIST(ClassName,EntryName)\
};
#define SV_IMPL_PERSIST_LIST(ClassName,EntryName)\
PRV_SV_IMPL_MEMBER_LIST(ClassName,EntryName,SvPersistBaseMemberList)
#define SV_DECL_IMPL_PERSIST_LIST(ClassName,EntryName)\
SV_DECL_PERSIST_LIST(ClassName,EntryName)\
SV_IMPL_PERSIST_LIST(ClassName,EntryName)
typedef UniqueIndex<SvPersistBase> SvPersistUIdx;
typedef std::map<SvPersistBase*, sal_uIntPtr> PersistBaseMap;
//=========================================================================
class SvStream;
class TOOLS_DLLPUBLIC SvPersistStream : public SvStream
/* [Beschreibung]
Mit dieser Klasse k"onnen Laufzeit Objektstrukturen gespeichert
und geladen werden. Es m"ussen immer alle beteiligten Objekte
gespeichert oder geladen werden. Um die Objekte automatisch
laden zu k"onnen, wird eine Factory f"ur jede Klasse von Objekten,
die im Stream vorkommen k"onnen, ben"otigt. Die Liste aller Klassen
wird in einem <SvClassManager> Objekt gespeichert und dem
SvPersistStream "ubergeben, wenn er erzeugt wird.
Weiterhin wird die M"oglichkeit geboten sal_uInt32 Werte komprimiert
zu schreiben und zu lesen (<SvPersistStream::WriteCompressed>,
<SvPersistStream::ReadCompressed>).
Es gibt auch die drei Hilfsmethoden <SvPersistStream::WriteDummyLen>,
<SvPersistStream::WriteLen> und <SvPersistStream::ReadLen> um eine
L"ange vor das Objekt zu schreiben.
[Beispiel]
Ein konkretes Beispiel ist im Konstruktor beschrieben.
Objekt A verweist auf B, dieses auf C und das wieder auf A.
C verweist auf D.
Die Reihenfolge beim Speichern und Laden ist egal, sie muss nur
gleich sein:
Speichern: Laden:
A,B,C,D A,B,C,D richtig
B,A,C,D B,A,C,D richtig
C,A,B,D A,B,C,D falsch
A,B,C,D A,B,C falsch
[Anmerkung]
Das Dateiformat zwischen DBG_UTIL und !DBG_UTIL ist unterschiedlich,
kann aber von beiden Versionen gelesen werden.
*/
{
SvClassManager & rClassMgr;
SvStream * pStm;
PersistBaseMap aPTable; // Pointer und Key gedreht
SvPersistUIdx aPUIdx;
sal_uIntPtr nStartIdx;
const SvPersistStream * pRefStm;
sal_uInt32 nFlags;
virtual sal_uIntPtr GetData( void* pData, sal_uIntPtr nSize );
virtual sal_uIntPtr PutData( const void* pData, sal_uIntPtr nSize );
virtual sal_uIntPtr SeekPos( sal_uIntPtr nPos );
virtual void FlushData();
protected:
void WriteObj( sal_uInt8 nHdr, SvPersistBase * pObj );
sal_uInt32 ReadObj( SvPersistBase * & rpObj,
sal_Bool bRegister );
public:
sal_Bool IsStreamed( SvPersistBase * pObj ) const
{ return 0 != GetIndex( pObj ); }
virtual void ResetError();
SvPersistStream( SvClassManager &, SvStream * pStream,
sal_uInt32 nStartIdx = 1 );
~SvPersistStream();
void SetStream( SvStream * pStream );
SvStream * GetStream() const { return pStm; }
virtual sal_uInt16 IsA() const;
SvPersistBase * GetObject( sal_uIntPtr nIdx ) const;
sal_uIntPtr GetIndex( SvPersistBase * ) const;
void SetContextFlags( sal_uInt32 n ) { nFlags = n; }
sal_uInt32 GetContextFlags() const { return nFlags; }
static void WriteCompressed( SvStream & rStm, sal_uInt32 nVal );
static sal_uInt32 ReadCompressed( SvStream & rStm );
sal_uInt32 WriteDummyLen();
void WriteLen( sal_uInt32 nLenPos );
sal_uInt32 ReadLen( sal_uInt32 * pTestPos );
SvPersistStream& WritePointer( SvPersistBase * pObj );
SvPersistStream& ReadPointer( SvPersistBase * & rpObj );
TOOLS_DLLPUBLIC friend SvPersistStream& operator << (SvPersistStream &, SvPersistBase *);
TOOLS_DLLPUBLIC friend SvPersistStream& operator >> (SvPersistStream &, SvPersistBase * &);
// Objekte halten ihre Id's w"ahrend geladen und
// gespeichert werden.
friend SvStream& operator >> ( SvStream &, SvPersistStream & );
friend SvStream& operator << ( SvStream &, SvPersistStream & );
};
#endif // _PSTM_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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