diff options
Diffstat (limited to 'db/mork/src/morkRowCellCursor.cpp')
| -rw-r--r-- | db/mork/src/morkRowCellCursor.cpp | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/db/mork/src/morkRowCellCursor.cpp b/db/mork/src/morkRowCellCursor.cpp new file mode 100644 index 000000000..d5d4a0d20 --- /dev/null +++ b/db/mork/src/morkRowCellCursor.cpp @@ -0,0 +1,289 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#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_INHERITED(morkRowCellCursor, morkCursor, nsIMdbRowCellCursor) + +/*public non-poly*/ void +morkRowCellCursor::CloseRowCellCursor(morkEnv* ev) +{ + 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); +} + +// } ===== 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) +{ + nsresult outErr = NS_OK; + 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) +{ + nsresult outErr = NS_OK; + 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) +{ + nsresult outErr = NS_OK; + 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(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 = nullptr; + 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(false, "not implemented"); + return NS_ERROR_NOT_IMPLEMENTED; +} + +// } ----- end cell iteration methods ----- + +// } ===== end nsIMdbRowCellCursor methods ===== + |