tabview.h

linux下一款GIS程序源码

// tabview.h: interface for the TABView class.
//
/*---------------------------------------------------------------------
 *                      class TABView
 *
 * TABView is used to handle special type of .TAB files that are
 * composed of a number of .TAB datasets linked through some indexed 
 * fields.
 *
 * NOTE: The current implementation supports only TABViews composed
 *       of 2 TABFiles linked through an indexed field of integer type.
 *       It is unclear if any other type of views could exist anyways.
 *--------------------------------------------------------------------*/

#ifndef  TABView_H
#define  TABView_H


#include "mapinfofile.h"

#include "tabrelation.h"

class TABView : public MapInfoFile  
{
private:
    char        *m_pszFname;
    TABAccess   m_eAccessMode;
    char        **m_papszTABFile;
    char        *m_pszVersion;
    char        *m_pszCharset;
    
    char        **m_papszTABFnames;
    TABFile     **m_papoTABFiles;
    int         m_numTABFiles;
    int         m_nMainTableIndex; // The main table is the one that also 
                                   // contains the geometries
    char        **m_papszFieldNames;
    char        **m_papszWhereClause;

    TABRelation *m_poRelation;
    UGKBool       m_bRelFieldsCreated;

    ///////////////
    // Private Read access specific stuff
    //
    int         ParseTABFile(const char *pszDatasetPath, 
                             UGKBool bTestOpenNoError = FALSE);

    int         OpenForRead(const char *pszFname, 
                            UGKBool bTestOpenNoError = FALSE );

    ///////////////
    // Private Write access specific stuff
    //
    int         OpenForWrite(const char *pszFname );
    int         WriteTABFile();


public:
	TABView();
	virtual ~TABView();

    virtual TABFileClass GetFileClass() {return TABFC_TABView;}

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

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

    virtual void        ResetReading();
    virtual int         TestCapability( const char * pszCap );
    virtual int         GetFeatureCount (int bForce);
    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 UGKSpatialReference *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);
    //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 m_nMainTableIndex!=-1?
                     m_papoTABFiles[m_nMainTableIndex]->GetProjInfo(poPI):-1; }
    virtual int  SetProjInfo(TABProjInfo *poPI)
            { return m_nMainTableIndex!=-1?
                     m_papoTABFiles[m_nMainTableIndex]->SetProjInfo(poPI):-1; }
    virtual int  SetMIFCoordSys(const char * /*pszMIFCoordSys*/) {return -1;};


    virtual void Dump(FILE *fpOut = NULL);


};

#endif