classVIBDataSet.h

Go to the documentation of this file.

#ifndef CLASSVIBDATASET_H__
#define CLASSVIBDATASET_H__

#include <string>
#include "VIBProperties.h"

struct VIBDataSet;
struct VIBDatabase;
struct VIBTransaction;

namespace VIB
{
   class Database;
   class Transaction;

   class DataSet
   {
   protected:
      VIBDataSet *vds; 

   public:
      DataSet(VIBDataSet *pvds = NULL);
      virtual ~DataSet();

      // Methods
      void Open();
      void First();
      void Next();
      void Close();
      void Prepare();
      bool Eof();
      std::string Plan();

      // Property classes

      class FieldByNameClass
      {
      protected:
         friend class DataSet;
         DataSet *parent;       
         std::string fieldname; 
      public:
         FieldByNameClass(DataSet *pParent);

         Property<std::string> AsString;
      };
      friend class FieldByNameClass;

      
      class FieldProp;

      class FieldClass
      {
      protected:
         friend class FieldProp;
         int index;   
         DataSet *ds; 

      public:
         FieldClass(DataSet *pds);

         Property<std::string>  AsString;
         Property<VIBFieldType> DataType;
         Property<VIBFieldKind> FieldKind;
         Property<std::string>  FieldName;
      };
      friend class FieldClass;
      
      class FieldProp
      {
      protected:
         FieldClass  fc; 
         DataSet    *ds; 

      public:
         FieldProp(DataSet *pds) : ds(pds), fc(pds) {}

         FieldClass *operator [] (int i)
         {
            fc.index = i;
            fc.ds    = ds;
            return &fc;
         }
      };

      class FieldsClass
      {
      protected:
         DataSet   *parent; 
         FieldProp fp;      

      public:
         FieldsClass(DataSet *pParent);

         Property<int> Count;
         ArrayProperty<FieldProp *, FieldClass *> Fields;
      };

      class SelectSQLClass
      {
      protected:
         DataSet *parent; 

      public:
         SelectSQLClass(DataSet *pParent);

         void Clear();
         void Add(const std::string &str);

         Property<std::string> Text;
      };
      friend class SelectSQLClass;

   protected:
      // Property class instances
      FieldByNameClass fbnc; 
      FieldsClass      fc;   
      SelectSQLClass   sql;  

   public:
      FieldByNameClass *FieldByName(const std::string &fieldname);

      // Properties
      Property<VIBDatabase *>      Database;
      Property<int>                FieldCount;
      Property<FieldsClass *>      Fields;
      Property<SelectSQLClass *>   SelectSQL;
      Property<VIBTransaction *>   Transaction;
      Property<bool>               UniDirectional;      
   };
}

#endif

// EOF