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gecko/db/mork/src/morkRowCellCursor.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef _MDB_
#include "mdb.h"
#endif
#ifndef _MORK_
#include "mork.h"
#endif
#ifndef _MORKNODE_
#include "morkNode.h"
#endif
#ifndef _MORKENV_
#include "morkEnv.h"
#endif
#ifndef _MORKCURSOR_
#include "morkCursor.h"
#endif
#ifndef _MORKROWCELLCURSOR_
#include "morkRowCellCursor.h"
#endif
#ifndef _MORKSTORE_
#include "morkStore.h"
#endif
#ifndef _MORKROWOBJECT_
#include "morkRowObject.h"
#endif
#ifndef _MORKROW_
#include "morkRow.h"
#endif
//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
// ````` ````` ````` ````` `````
// { ===== begin morkNode interface =====
/*public virtual*/ void
morkRowCellCursor::CloseMorkNode(morkEnv* ev) // CloseRowCellCursor() only if open
{
if ( this->IsOpenNode() )
{
this->MarkClosing();
this->CloseRowCellCursor(ev);
this->MarkShut();
}
}
/*public virtual*/
morkRowCellCursor::~morkRowCellCursor() // CloseRowCellCursor() executed earlier
{
CloseMorkNode(mMorkEnv);
MORK_ASSERT(this->IsShutNode());
}
/*public non-poly*/
morkRowCellCursor::morkRowCellCursor(morkEnv* ev,
const morkUsage& inUsage,
nsIMdbHeap* ioHeap, morkRowObject* ioRowObject)
: morkCursor(ev, inUsage, ioHeap)
, mRowCellCursor_RowObject( 0 )
, mRowCellCursor_Col( 0 )
{
if ( ev->Good() )
{
if ( ioRowObject )
{
morkRow* row = ioRowObject->mRowObject_Row;
if ( row )
{
if ( row->IsRow() )
{
mCursor_Pos = -1;
mCursor_Seed = row->mRow_Seed;
morkRowObject::SlotStrongRowObject(ioRowObject, ev,
&mRowCellCursor_RowObject);
if ( ev->Good() )
mNode_Derived = morkDerived_kRowCellCursor;
}
else
row->NonRowTypeError(ev);
}
else
ioRowObject->NilRowError(ev);
}
else
ev->NilPointerError();
}
}
NS_IMPL_ISUPPORTS_INHERITED1(morkRowCellCursor, morkCursor, nsIMdbRowCellCursor)
/*public non-poly*/ void
morkRowCellCursor::CloseRowCellCursor(morkEnv* ev)
{
if ( this )
{
if ( this->IsNode() )
{
mCursor_Pos = -1;
mCursor_Seed = 0;
morkRowObject::SlotStrongRowObject((morkRowObject*) 0, ev,
&mRowCellCursor_RowObject);
this->CloseCursor(ev);
this->MarkShut();
}
else
this->NonNodeError(ev);
}
else
ev->NilPointerError();
}
// } ===== end morkNode methods =====
// ````` ````` ````` ````` `````
/*static*/ void
morkRowCellCursor::NilRowObjectError(morkEnv* ev)
{
ev->NewError("nil mRowCellCursor_RowObject");
}
/*static*/ void
morkRowCellCursor::NonRowCellCursorTypeError(morkEnv* ev)
{
ev->NewError("non morkRowCellCursor");
}
//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
// { ----- begin attribute methods -----
NS_IMETHODIMP
morkRowCellCursor::SetRow(nsIMdbEnv* mev, nsIMdbRow* ioRow)
{
mdb_err outErr = 0;
morkRow* row = 0;
morkEnv* ev = morkEnv::FromMdbEnv(mev);
if ( ev )
{
row = (morkRow *) ioRow;
morkStore* store = row->GetRowSpaceStore(ev);
if ( store )
{
morkRowObject* rowObj = row->AcquireRowObject(ev, store);
if ( rowObj )
{
morkRowObject::SlotStrongRowObject((morkRowObject*) 0, ev,
&mRowCellCursor_RowObject);
mRowCellCursor_RowObject = rowObj; // take this strong ref
mCursor_Seed = row->mRow_Seed;
row->GetCell(ev, mRowCellCursor_Col, &mCursor_Pos);
}
}
outErr = ev->AsErr();
}
return outErr;
}
NS_IMETHODIMP
morkRowCellCursor::GetRow(nsIMdbEnv* mev, nsIMdbRow** acqRow)
{
mdb_err outErr = 0;
nsIMdbRow* outRow = 0;
morkEnv* ev = morkEnv::FromMdbEnv(mev);
if ( ev )
{
morkRowObject* rowObj = mRowCellCursor_RowObject;
if ( rowObj )
outRow = rowObj->AcquireRowHandle(ev);
outErr = ev->AsErr();
}
if ( acqRow )
*acqRow = outRow;
return outErr;
}
// } ----- end attribute methods -----
// { ----- begin cell creation methods -----
NS_IMETHODIMP
morkRowCellCursor::MakeCell( // get cell at current pos in the row
nsIMdbEnv* mev, // context
mdb_column* outColumn, // column for this particular cell
mdb_pos* outPos, // position of cell in row sequence
nsIMdbCell** acqCell)
{
mdb_err outErr = 0;
nsIMdbCell* outCell = 0;
mdb_pos pos = 0;
mdb_column col = 0;
morkRow* row = 0;
morkEnv* ev = morkEnv::FromMdbEnv(mev);
if ( ev )
{
pos = mCursor_Pos;
morkCell* cell = row->CellAt(ev, pos);
if ( cell )
{
col = cell->GetColumn();
outCell = row->AcquireCellHandle(ev, cell, col, pos);
}
outErr = ev->AsErr();
}
if ( acqCell )
*acqCell = outCell;
if ( outPos )
*outPos = pos;
if ( outColumn )
*outColumn = col;
return outErr;
}
// } ----- end cell creation methods -----
// { ----- begin cell seeking methods -----
NS_IMETHODIMP
morkRowCellCursor::SeekCell( // same as SetRow() followed by MakeCell()
nsIMdbEnv* mev, // context
mdb_pos inPos, // position of cell in row sequence
mdb_column* outColumn, // column for this particular cell
nsIMdbCell** acqCell)
{
NS_ASSERTION(PR_FALSE, "not implemented");
return NS_ERROR_NOT_IMPLEMENTED;
}
// } ----- end cell seeking methods -----
// { ----- begin cell iteration methods -----
NS_IMETHODIMP
morkRowCellCursor::NextCell( // get next cell in the row
nsIMdbEnv* mev, // context
nsIMdbCell** acqCell, // changes to the next cell in the iteration
mdb_column* outColumn, // column for this particular cell
mdb_pos* outPos)
{
morkEnv* ev = morkEnv::FromMdbEnv(mev);
mdb_column col = 0;
mdb_pos pos = mRowCellCursor_Col;
if ( pos < 0 )
pos = 0;
else
++pos;
morkCell* cell = mRowCellCursor_RowObject->mRowObject_Row->CellAt(ev, pos);
if ( cell )
{
col = cell->GetColumn();
*acqCell = mRowCellCursor_RowObject->mRowObject_Row->AcquireCellHandle(ev, cell, col, pos);
}
else
{
*acqCell = nsnull;
pos = -1;
}
if ( outPos )
*outPos = pos;
if ( outColumn )
*outColumn = col;
mRowCellCursor_Col = pos;
return NS_OK;
}
NS_IMETHODIMP
morkRowCellCursor::PickNextCell( // get next cell in row within filter set
nsIMdbEnv* mev, // context
nsIMdbCell* ioCell, // changes to the next cell in the iteration
const mdbColumnSet* inFilterSet, // col set of actual caller interest
mdb_column* outColumn, // column for this particular cell
mdb_pos* outPos)
// Note that inFilterSet should not have too many (many more than 10?)
// cols, since this might imply a potential excessive consumption of time
// over many cursor calls when looking for column and filter intersection.
{
NS_ASSERTION(PR_FALSE, "not implemented");
return NS_ERROR_NOT_IMPLEMENTED;
}
// } ----- end cell iteration methods -----
// } ===== end nsIMdbRowCellCursor methods =====
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