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 *  Sun Microsystems Inc., October, 2000
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 *  Sun Industry Standards Source License Version 1.1
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/*************************************************************************
 * @file
 *  index manager, to maintain the map between object id and offset
 ************************************************************************/
/*************************************************************************
 * Change History
 Jan 2005			Created
 ************************************************************************/

#ifndef _LWPINDEXMANAGER_HXX
#define _LWPINDEXMANAGER_HXX

#include <rtl/ustring.hxx>
#include "lwpobjhdr.hxx"
#include "lwpobjstrm.hxx"

/**
 * @brief	key structure used to map id to offset
*/
struct LwpKey
{
    LwpObjectID id;
    sal_uInt32 offset;
};
/**
 * @brief	LwpIndexManager, to read all index records and maintain the index information
*/
class LwpIndexManager
{
public:
    LwpIndexManager();
    ~LwpIndexManager();
protected:
    static const sal_uInt8 MAXOBJECTIDS;
    std::vector<LwpKey*> m_ObjectKeys;	//the <id, offset> ordered vector
    std::vector<LwpKey*> m_RootObjs;		//For those object ids in RootObjIndex
    std::vector<sal_uInt32> m_TimeTable;	//Time table for object low id compression

    //sal_uInt16 m_nKeyCount;
    sal_uInt32 m_nKeyCount;		//the count of all object
    std::vector<sal_uInt32> m_TempVec;	// a temp vector , store the offset of leafindex

    sal_uInt32 m_ChildIndex[256];	//Offset of leaf index
    sal_uInt16 m_nLeafCount;
protected:
    void ReadRootData(LwpObjectStream *pObjStrm );	//Read root index data


    //Add new method to handle ObjIndex
    void ReadObjIndexData(LwpObjectStream* pObjStrm);
    void ReadObjIndex( LwpSvStream *pStrm );	//Read Obj index


    void ReadLeafIndex( LwpSvStream *pStrm );	//Read leaf index obj
    void ReadLeafData( LwpObjectStream *pStrm );	//Read leaf index obj data
    void ReadTimeTable( LwpObjectStream *pStrm );
public:
    void Read( LwpSvStream *pStrm );
    sal_uInt32 GetObjOffset( LwpObjectID objid );
    sal_uInt32 GetObjTime( sal_uInt16 index ) { return m_TimeTable[index-1]; }
};
#endif

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