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cQuery.cpp

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/******************************************************************************/
/*                                                                            */
/* POLiTe - Persistent Object Library Test                                    */
/*                                        Ph.D. Thesis by Mgr. Michal Kopecky */
/*                                                                            */
/* Charles University Prague                                                  */
/*                                                                            */
/******************************************************************************/
/*                                                                            */
/* File name: ...                                                             */
/* Module: ......                                                             */
/*                                                                            */
/******************************************************************************/

// Standard Header(s)
#include <malloc.h>

// Common POLiTe Header(s)
#include <lTrace.h>
#include <lDefs.h>

// Own Header
#include <cQuery.h>

const class Query ALL("0=0");
const class Query NONE("0<>0");
const class Query EQUERY;

Query::Query(
        const char *const a_where,
        const char *const a_order_by
        )
{
        StrCpy(_where = NULL, a_where);
        StrCpy(_order_by = NULL, a_order_by);
};

Query::Query(
        const QueRefProto &X
        )
{
        _where = X._Where(); //_Where() returns new string instance !!!
        _order_by = X._OrderBy(); //_OrderBy() returns new string instance !!!
};

Query::Query(
        const Query &X
        )
{
        _where = X._Where(); //_Where() returns new string instance !!!
        _order_by = X._OrderBy(); //_OrderBy() returns new string instance !!!
};

Query::~Query()
{
        StrFree(_where);
        StrFree(_order_by);
};

bool Query::Where(const char * const a_where)
{
        StrCpy(_where, a_where);
        return true;
};

bool Query::OrderBy(const char * const a_order_by)
{
        StrCpy(_order_by, a_order_by);
        return true;
};

Query &Query::Not(){
        char *pom = NULL;
        if (_where) {
                StrCat(pom,3,"NOT(",_where,")");
                free(_where);
                _where = pom;
                };
        return *this;
};

Query &Query::Or(const QueRefProto &Q)
{
        char *_aux = Q._Where();
        StrOr(_where,_aux);
        StrFree(_aux);
        return *this;
};

Query &Query::And(const QueRefProto &Q)
{
        char *_aux = Q._Where();
        StrAnd(_where,_aux);
        StrFree(_aux);
        return *this;
};

Query &Query::operator =(const QueRefProto &X)
{
        if (&X != this) {
                StrFree(_where);
        _where = X._Where();
        StrFree(_order_by);
        _order_by = X._OrderBy();
        };
        return *this;
};

Query &Query::operator =(const Query &X)
{
        if (&X != this) {
                StrFree(_where);
        _where = X._Where();
        StrFree(_order_by);
        _order_by = X._OrderBy();
        };
        return *this;
};

char *Query::_Where() const
{
        char *_retval = StrCpy(_retval = NULL, _where);
        return _retval;
};

char *Query::_OrderBy() const
{
        char *_retval = StrCpy(_retval = NULL, _order_by);
        return _retval;
};

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