miffile.h

linux下一款GIS程序源码

// miffile.h: interface for the MIFFile class.
//
//////////////////////////////////////////////////////////////////////

#ifndef  MIFFile_H
#define  MIFFile_H

#include "mapinfofile.h"

#include "middatafile.h"


class MIFFile : public MapInfoFile  
{
 private:
    char        *m_pszFname;
    TABAccess    m_eAccessMode;
    char        *m_pszVersion;
    char        *m_pszCharset;
    char        *m_pszDelimiter;
    char        *m_pszUnique;
    char        *m_pszIndex;
    char        *m_pszCoordSys;

    TABFieldType *m_paeFieldType;
    UGKBool       *m_pabFieldIndexed;
    UGKBool       *m_pabFieldUnique;

    double       m_dfXMultiplier;
    double       m_dfYMultiplier;
    double       m_dfXDisplacement;
    double       m_dfYDisplacement;

    /* these are the projection bounds, possibly much broader than extents */
    double      m_dXMin;
    double      m_dYMin;
    double      m_dXMax;
    double      m_dYMax;

    /* extents, as cached by MIFFile::PreParseFile() */
    int         m_bExtentsSet;
    UGKEnvelope m_sExtents;

    int         m_nPoints;
    int         m_nLines;
    int         m_nRegions;
    int         m_nTexts;

    int         m_nPreloadedId;  // preloaded mif line is for this feature id
    MIDDATAFile  *m_poMIDFile;   // Mid file
    MIDDATAFile  *m_poMIFFile;   // Mif File

    UGKFeatureDefn *m_poDefn;
    //UGKSpatialReference *m_poSpatialRef;

    int         m_nFeatureCount;
    int         m_nWriteFeatureId;
    int         m_nAttribut;

    ///////////////
    // Private Read access specific stuff
    //
    int         ReadFeatureDefn();
    int         ParseMIFHeader();
    void        PreParseFile();
    int         AddFields(const char *pszLine);
    int         GotoFeature(int nFeatureId);
    int         NextFeature();

    ///////////////
    // Private Write access specific stuff
    //
    UGKBool       m_bPreParsed;
    UGKBool       m_bHeaderWrote;

    int         WriteMIFHeader();
    void UpdateExtents(double dfX,double dfY);
public:
	MIFFile();
	virtual ~MIFFile();

	virtual TABFileClass GetFileClass() {return TABFC_MIFFile;}

    virtual int Open(const char *pszFname, const char *pszAccess,
                     UGKBool bTestOpenNoError = FALSE );
	virtual int Close();

    virtual const char *GetTableName()
                           {return m_poDefn?m_poDefn->GetName():"";};

    virtual int         TestCapability( const char * pszCap ) ;
    virtual int         GetFeatureCount (int bForce);
    virtual void        ResetReading();
    virtual int         GetExtent(UGKEnvelope *psExtent, int bForce);

    ///////////////
    // Read access specific stuff
    //
    
    virtual int GetNextFeatureId(int nPrevId);
    virtual TABFeature *GetFeatureRef(int nFeatureId);
    virtual UGKFeatureDefn *GetLayerDefn();

	virtual TABFieldType GetNativeFieldType(int nFieldId);

    virtual int GetBounds(double &dXMin, double &dYMin, 
                          double &dXMax, double &dYMax,
                          UGKBool bForce = TRUE );

	//virtual USKSpatialReference *GetSpatialRef();

    virtual int GetFeatureCountByType(int &numPoints, int &numLines,
                                      int &numRegions, int &numTexts,
                                      UGKBool bForce = TRUE);
    virtual UGKBool IsFieldIndexed(int nFieldId);
    virtual UGKBool IsFieldUnique(int nFieldId);

    ///////////////
    // Write access specific stuff
    //
    virtual int SetBounds(double dXMin, double dYMin, 
                          double dXMax, double dYMax);
    virtual int SetFeatureDefn(UGKFeatureDefn *poFeatureDefn,
                            TABFieldType *paeMapInfoNativeFieldTypes = NULL);
    virtual int AddFieldNative(const char *pszName, TABFieldType eMapInfoType,
                               int nWidth=0, int nPrecision=0,
                               UGKBool bIndexed=FALSE, UGKBool bUnique=FALSE);
    /* TODO */
    //virtual int SetSpatialRef(UGKSpatialReference *poSpatialRef);

    virtual int SetFeature(TABFeature *poFeature, int nFeatureId = -1);

    virtual int SetFieldIndexed(int nFieldId);

    ///////////////
    // semi-private.
    virtual int  GetProjInfo(TABProjInfo * /*poPI*/){return -1;}
    /*  { return m_poMAPFile->GetHeaderBlock()->GetProjInfo( poPI ); }*/
    virtual int  SetProjInfo(TABProjInfo * /*poPI*/){return -1;}
    /*  { return m_poMAPFile->GetHeaderBlock()->SetProjInfo( poPI ); }*/
    virtual int  SetMIFCoordSys(const char * pszMIFCoordSys);

	virtual void Dump(FILE * /*fpOut*/ = NULL) {};
};

#endif