Parser.h

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/* $Id: Parser.h,v 1.3 2002/09/17 16:36:20 cvs Exp $ */

#ifndef __PARSER_H
#define __PARSER_H

#include <stdio.h>
#include <esg/SceneGraphObject.h>
#include <esg/spacesorting/SDS.h>
#include <esg/LightSource.h>

namespace esg {

class Parser {
public:
    struct Statistics {
        int vertices;
        int primitives;
        int vertNormals;
        Statistics() : vertices(0), primitives(0), vertNormals(0) {}
        void init() { vertices=0; primitives=0; vertNormals=0; }
    };

protected:
    const SDS             * _pSSProto;       // SS used for primitive storage
    SceneGraphObject::OID   _oid;            // start of OID range 
    SceneGraphObject      * _pParsedObject;  // result of current parsing
    Statistics            * _pStat;          // statistics
    List<LightSource>       _lights;         // lights

public:
    Parser(const char            * /* path */,
           const SDS             & proto,
           SceneGraphObject::OID   firstOID = 1,
           Statistics            * pStat = NULL)
        : _oid(firstOID)
    {
        _pSSProto = (SDS*) proto.clone();
        _pParsedObject = NULL;
        _pStat = pStat;
        if (_pStat) _pStat->init();
    }

    virtual ~Parser() {
        LightSource * l;
        do { l=_lights.remove(_lights.firstItem()); delete l; } while (l);
        delete _pSSProto;
    }
    
    virtual bool              parseObject (void) = 0;
    virtual SceneGraphObject* getObject   (void) { return _pParsedObject; }
    
    virtual LightSource* getLight(void) {
        return _lights.remove(_lights.firstItem());
    }
    

    void                  setOID (SceneGraphObject::OID o) { _oid = o; }
    SceneGraphObject::OID getOID (void) const              { return _oid; }

    Statistics* getStatistics (void) { return _pStat; }

};

}; // namespace

#endif // __PARSER_H

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