TRowIteratorWithRemove Class Reference

Iterator class for TTable rows, that allows logical row removal while iterating. More...

#include <table.h>

Collaboration diagram for TRowIteratorWithRemove:

Public Member Functions
	TRowIteratorWithRemove ()
	Default constructor. More...
	TRowIteratorWithRemove (TInt RowIdx, TTable *TablePtr)
	Constructs iterator pointing to given row. More...
	TRowIteratorWithRemove (TInt RowIdx, TTable *TablePtr, TBool IsStart)
	Constructs iterator pointing to given row. More...
	TRowIteratorWithRemove (const TRowIteratorWithRemove &RowI)
	Copy constructor. More...
TRowIteratorWithRemove &	operator++ (int)
	Increments the iterator. More...
TRowIteratorWithRemove &	Next ()
	Increments the iterator (For Python compatibility). More...
bool	operator< (const TRowIteratorWithRemove &RowI) const
	Checks if this iterator points to a row that is before the one pointed by RowI. More...
bool	operator== (const TRowIteratorWithRemove &RowI) const
	Checks if this iterator points to the same row pointed by RowI. More...
TInt	GetRowIdx () const
	Gets physical index of current row. More...
TInt	GetNextRowIdx () const
	Gets physical index of next row. More...
TInt	GetNextIntAttr (TInt ColIdx) const
	Returns value of integer attribute specified by integer column index for next row. More...
TFlt	GetNextFltAttr (TInt ColIdx) const
	Returns value of float attribute specified by float column index for next row. More...
TStr	GetNextStrAttr (TInt ColIdx) const
	Returns value of string attribute specified by string column index for next row. More...
TInt	GetNextIntAttr (const TStr &Col) const
	Returns value of integer attribute specified by attribute name for next row. More...
TFlt	GetNextFltAttr (const TStr &Col) const
	Returns value of float attribute specified by attribute name for next row. More...
TStr	GetNextStrAttr (const TStr &Col) const
	Returns value of string attribute specified by attribute name for next row. More...
TBool	IsFirst () const
	Checks whether iterator points to first valid row of the table. More...
void	RemoveNext ()
	Removes next row. More...
TBool	CompareAtomicConst (TInt ColIdx, const TPrimitive &Val, TPredComp Cmp)
	Compares value in column ColIdx with given primitive Val. More...

Private Attributes
TInt	CurrRowIdx
	Physical row index of current row pointer by iterator. More...
TTable *	Table
	Reference to table containing this row. More...
TBool	Start
	A flag indicating whether the current row in the first valid row of the table. More...

Detailed Description

Iterator class for TTable rows, that allows logical row removal while iterating.

Definition at line 374 of file table.h.

Constructor & Destructor Documentation

TRowIteratorWithRemove::TRowIteratorWithRemove ( )

inline

Default constructor.

Definition at line 380 of file table.h.

: CurrRowIdx(0), Table(NULL), Start(true) {}

TRowIteratorWithRemove::TRowIteratorWithRemove	(	TInt	RowIdx,
		TTable *	TablePtr
	)

Constructs iterator pointing to given row.

Definition at line 215 of file table.cpp.

                                                                            :
  CurrRowIdx(RowIdx), Table(TablePtr), Start(RowIdx == TablePtr->FirstValidRow) {}

TRowIteratorWithRemove::TRowIteratorWithRemove ( TInt  RowIdx, TTable *  TablePtr, TBool  IsStart  )

inline

Constructs iterator pointing to given row.

Definition at line 384 of file table.h.

                                                                       : CurrRowIdx(RowIdx),
    Table(TablePtr), Start(IsStart) {}

TRowIteratorWithRemove::TRowIteratorWithRemove ( const TRowIteratorWithRemove &  RowI )

inline

Copy constructor.

Definition at line 387 of file table.h.

                                                             : CurrRowIdx(RowI.CurrRowIdx),
    Table(RowI.Table), Start(RowI.Start) {}

Member Function Documentation

TBool TRowIteratorWithRemove::CompareAtomicConst	(	TInt	ColIdx,
		const TPrimitive &	Val,
		TPredComp	Cmp
	)

Compares value in column ColIdx with given primitive Val.

Definition at line 282 of file table.cpp.

References atFlt, atInt, atStr, Cmp(), TPredicate::EvalAtom(), TPredicate::EvalStrAtom(), TPrimitive::GetFlt(), TPrimitive::GetInt(), GetNextFltAttr(), GetNextIntAttr(), GetNextStrAttr(), TPrimitive::GetStr(), and TPrimitive::GetType().

Referenced by TTable::SelectAtomicConst().

                                                                                                  {
  TBool Result;
  switch (Val.GetType()) {
    case atInt:
      Result = TPredicate::EvalAtom(GetNextIntAttr(ColIdx), Val.GetInt(), Cmp);
      break;
    case atFlt:
      Result = TPredicate::EvalAtom(GetNextFltAttr(ColIdx), Val.GetFlt(), Cmp);
      break;
    case atStr:
      Result = TPredicate::EvalStrAtom(GetNextStrAttr(ColIdx), Val.GetStr(), Cmp);
      break;
    default:
      Result = TBool(false);
  }
  return Result;
}

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TFlt TRowIteratorWithRemove::GetNextFltAttr

(

TInt

ColIdx

)

const

Returns value of float attribute specified by float column index for next row.

Definition at line 252 of file table.cpp.

References TTable::FltCols, GetNextRowIdx(), and Table.

Referenced by CompareAtomicConst(), TTable::Select(), and TTable::SelectAtomic().

                                                             {
  return Table->FltCols[ColIdx][GetNextRowIdx()];
}

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TFlt TRowIteratorWithRemove::GetNextFltAttr

(

const TStr &

Col

)

const

Returns value of float attribute specified by attribute name for next row.

Definition at line 265 of file table.cpp.

References TTable::FltCols, TTable::GetColIdx(), GetNextRowIdx(), and Table.

                                                                 {
  TInt ColIdx = Table->GetColIdx(Col);
  return Table->FltCols[ColIdx][GetNextRowIdx()];
}

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TInt TRowIteratorWithRemove::GetNextIntAttr

(

TInt

ColIdx

)

const

Returns value of integer attribute specified by integer column index for next row.

Definition at line 248 of file table.cpp.

References GetNextRowIdx(), TTable::IntCols, and Table.

Referenced by CompareAtomicConst(), TTable::Select(), and TTable::SelectAtomic().

                                                             {
  return Table->IntCols[ColIdx][GetNextRowIdx()];
}

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TInt TRowIteratorWithRemove::GetNextIntAttr

(

const TStr &

Col

)

const

Returns value of integer attribute specified by attribute name for next row.

Definition at line 260 of file table.cpp.

References TTable::GetColIdx(), GetNextRowIdx(), TTable::IntCols, and Table.

                                                                 {
  TInt ColIdx = Table->GetColIdx(Col);
  return Table->IntCols[ColIdx][GetNextRowIdx()];
}

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TInt TRowIteratorWithRemove::GetNextRowIdx

(

)

const

Gets physical index of next row.

Definition at line 243 of file table.cpp.

References CurrRowIdx, TTable::FirstValidRow, TTable::Next, Start, and Table.

Referenced by GetNextFltAttr(), GetNextIntAttr(), GetNextStrAttr(), TTable::KeepSortedRows(), Next(), RemoveNext(), TTable::Select(), TTable::SelectAtomic(), and TTable::SelectAtomicConst().

                                                 {
  return (Start ? Table->FirstValidRow : Table->Next[CurrRowIdx]);
}

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TStr TRowIteratorWithRemove::GetNextStrAttr

(

TInt

ColIdx

)

const

Returns value of string attribute specified by string column index for next row.

Definition at line 256 of file table.cpp.

References GetNextRowIdx(), TTable::GetStrValIdx(), and Table.

Referenced by CompareAtomicConst(), TTable::Select(), and TTable::SelectAtomic().

                                                             {
  return Table->GetStrValIdx(ColIdx, GetNextRowIdx());
}

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TStr TRowIteratorWithRemove::GetNextStrAttr

(

const TStr &

Col

)

const

Returns value of string attribute specified by attribute name for next row.

Definition at line 270 of file table.cpp.

References GetNextRowIdx(), TTable::GetStrVal(), and Table.

                                                                 {
  return Table->GetStrVal(Col, GetNextRowIdx());
}

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TInt TRowIteratorWithRemove::GetRowIdx

(

)

const

Gets physical index of current row.

Definition at line 239 of file table.cpp.

References CurrRowIdx.

                                             {
  return CurrRowIdx;
}

TBool TRowIteratorWithRemove::IsFirst

(

)

const

Checks whether iterator points to first valid row of the table.

Definition at line 274 of file table.cpp.

References CurrRowIdx, TTable::FirstValidRow, and Table.

                                            {
  return CurrRowIdx == Table->FirstValidRow;
}

TRowIteratorWithRemove & TRowIteratorWithRemove::Next

(

)

Increments the iterator (For Python compatibility).

Definition at line 222 of file table.cpp.

References Assert, CurrRowIdx, GetNextRowIdx(), and Start.

Referenced by operator++().

                                                     {
  CurrRowIdx = GetNextRowIdx();
  Start = false;
  Assert(CurrRowIdx != TTable::Invalid);
  return *this;
}

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TRowIteratorWithRemove & TRowIteratorWithRemove::operator++

(

int

)

Increments the iterator.

Definition at line 218 of file table.cpp.

References Next().

                                                              {
  return this->Next();
}

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bool TRowIteratorWithRemove::operator<

(

const TRowIteratorWithRemove &

RowI

)

const

Checks if this iterator points to a row that is before the one pointed by RowI.

Definition at line 229 of file table.cpp.

References CurrRowIdx.

                                                                                 {
  if (CurrRowIdx == TTable::Last) { return false; }
  if (RowI.CurrRowIdx == TTable::Last) { return true; }
  return CurrRowIdx < RowI.CurrRowIdx;
}

bool TRowIteratorWithRemove::operator==

(

const TRowIteratorWithRemove &

RowI

)

const

Checks if this iterator points to the same row pointed by RowI.

Definition at line 235 of file table.cpp.

References CurrRowIdx.

                                                                                  {
  return CurrRowIdx == RowI.CurrRowIdx;
}

void TRowIteratorWithRemove::RemoveNext

(

)

Removes next row.

Definition at line 278 of file table.cpp.

References CurrRowIdx, GetNextRowIdx(), TTable::RemoveRow(), and Table.

Referenced by TTable::KeepSortedRows(), TTable::Select(), TTable::SelectAtomic(), and TTable::SelectAtomicConst().

                                        {
  Table->RemoveRow(GetNextRowIdx(), CurrRowIdx);
}

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Member Data Documentation

TInt TRowIteratorWithRemove::CurrRowIdx

private

Physical row index of current row pointer by iterator.

Definition at line 375 of file table.h.

Referenced by GetNextRowIdx(), GetRowIdx(), IsFirst(), Next(), operator<(), operator==(), and RemoveNext().

TBool TRowIteratorWithRemove::Start

private

A flag indicating whether the current row in the first valid row of the table.

Definition at line 377 of file table.h.

Referenced by GetNextRowIdx(), and Next().

TTable* TRowIteratorWithRemove::Table

private

Reference to table containing this row.

Definition at line 376 of file table.h.

Referenced by GetNextFltAttr(), GetNextIntAttr(), GetNextRowIdx(), GetNextStrAttr(), IsFirst(), and RemoveNext().

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The documentation for this class was generated from the following files:

• snap-core/table.h
• snap-core/table.cpp