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420 lines
13 KiB
420 lines
13 KiB
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1997 - 2000.
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//
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// File: strgroup.cxx
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//
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// Contents: Builds a nesting node object from a GroupBy string
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//
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// History: 10 Apr 1997 AlanW Created
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//
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//----------------------------------------------------------------------------
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#include <pch.cxx>
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#pragma hdrstop
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#include <strsort.hxx>
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static GUID guidBmk = DBBMKGUID;
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static CDbColId psBookmark( guidBmk, PROPID_DBBMK_BOOKMARK );
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//+---------------------------------------------------------------------------
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//
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// Function: GetStringDbGroupNode - public
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//
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// Synopsis: Builds a CDbNestingNode from the string passed
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//
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// Arguments: [pwszGroup] - the string containing the grouping specification
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// [pList] - the property list describing the column names
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//
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// Notes: CPListException is used instead of CParserException so the
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// error class will be IDQError, not RESError in idq.dll.
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//
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// History: 10 Apr 1997 AlanW Created.
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//
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//----------------------------------------------------------------------------
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CDbNestingNode * GetStringDbGroupNode( const WCHAR * pwszGroup,
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IColumnMapper * pList )
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{
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Win4Assert( 0 != pwszGroup );
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CQueryScanner scanner( pwszGroup, FALSE, GetUserDefaultLCID(), TRUE );
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CParseGrouping ParseObj( scanner, pList, FALSE );
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ParseObj.Parse();
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return ParseObj.AcquireNode();
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CParseGrouping::Parse, public
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//
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// Synopsis: Parse a GroupBy string, construct the nesting node
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//
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// Arguments: -NONE- uses previously set member variables
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//
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// Notes: CPListException is used instead of CParserException so the
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// error class will be IDQError, not RESError in idq.dll.
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//
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// History: 10 Apr 1997 AlanW Created.
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//
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//----------------------------------------------------------------------------
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void CParseGrouping::Parse( )
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{
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while (_Scanner.LookAhead() != EOS_TOKEN)
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{
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XPtr<CDbNestingNode> xNode( ParseGrouping() );
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if (_Scanner.LookAhead() == COMMA_TOKEN)
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{
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_Scanner.Accept();
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}
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else if (_Scanner.LookAhead() != EOS_TOKEN)
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{
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THROW( CPListException(QPARSE_E_EXPECTING_COMMA, 0) );
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}
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if (0 == _cNestings)
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{
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Win4Assert( _xNode.GetPointer() == 0 );
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_xNode.Set( xNode.Acquire() );
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}
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else
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{
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CDbNestingNode * pNode = _xNode.GetPointer();
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for (unsigned i=1; i < _cNestings; i++)
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{
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Win4Assert( pNode->GetCommandType() == DBOP_nesting );
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pNode = (CDbNestingNode *)pNode->GetFirstChild();
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}
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Win4Assert( pNode != 0 && pNode->GetFirstChild()->GetCommandType() == DBOP_project_list_anchor );
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pNode->AddTable( xNode.Acquire() );
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}
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_cNestings++;
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}
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if (_fNeedSortNode)
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AddSortList( _xSortNode );
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CParseGrouping::ParseGrouping, private
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//
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// Synopsis: Parse an individual grouping specification
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//
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// Arguments: -NONE- uses previously set member variables
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//
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// Notes: The scanner is advanced past the parsed grouping spec.
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//
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// History: 10 Apr 1997 AlanW Created.
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//
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//----------------------------------------------------------------------------
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CDbNestingNode * CParseGrouping::ParseGrouping( )
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{
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CDbNestingNode * pDbNestingNode = new CDbNestingNode();
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if ( 0 == pDbNestingNode )
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{
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THROW( CException(STATUS_INSUFFICIENT_RESOURCES) );
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}
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XPtr<CDbNestingNode> xDbNestingNode(pDbNestingNode);
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//
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// Parse any leading grouping type specification.
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//
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ULONG ulCatType = eUnique; // Assume unique value categories
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if ( _Scanner.LookAhead() == W_OPEN_TOKEN )
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ulCatType = ParseGroupingType();
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// NOTE: only the unique categorization is implemented.
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if (ulCatType != eUnique)
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THROW( CPListException(QPARSE_E_INVALID_GROUPING, 0) );
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if ( 0 == _xSortNode.GetPointer() )
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{
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CDbSortNode * pDbSortNode = new CDbSortNode();
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if ( 0 == pDbSortNode )
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{
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THROW( CException(STATUS_INSUFFICIENT_RESOURCES) );
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}
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_xSortNode.Set(pDbSortNode);
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}
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BOOL fFirstGroupingColumn = TRUE;
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for ( XPtrST<WCHAR> pwszColumnName( _Scanner.AcqColumn() );
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pwszColumnName.GetPointer() != 0;
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pwszColumnName.Set( _Scanner.AcqColumn() )
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)
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{
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_Scanner.AcceptColumn(); // Remove the column name
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//
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// Parse for the [a] or [d] parameters.
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//
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unsigned order = QUERY_SORTASCEND; // Assume ascending sort order
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if ( _Scanner.LookAhead() == W_OPEN_TOKEN )
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{
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_Scanner.Accept(); // Remove the '['
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WCHAR wchOrder = _Scanner.GetCommandChar();
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if ( wchOrder == L'a' )
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{
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order = QUERY_SORTASCEND;
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}
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else if ( wchOrder == L'd' )
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{
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order = QUERY_SORTDESCEND;
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_fNeedSortNode = TRUE;
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}
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else
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{
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// Report an error
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THROW( CPListException(QPARSE_E_INVALID_SORT_ORDER, 0) );
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}
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WCHAR wchNext = _Scanner.GetCommandChar();
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if (wchNext != 0 && !iswspace(wchNext))
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// some alphabetic character followed the '[a' or '[d'.
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THROW( CPListException(QPARSE_E_INVALID_SORT_ORDER, 0) );
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_Scanner.AcceptCommand(); // Remove the command character
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if ( _Scanner.LookAhead() != W_CLOSE_TOKEN )
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{
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// Report an error
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THROW( CPListException(QPARSE_E_EXPECTING_BRACE, 0) );
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}
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_Scanner.Accept(); // Remove the ']' character
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}
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//
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// Add the new grouping column to the nesting node
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//
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CDbColId *pDbColId = 0;
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DBID *pdbid = 0;
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if ( FAILED(_xPropList->GetPropInfoFromName( pwszColumnName.GetPointer(), &pdbid, 0, 0 )) )
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{
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//
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// Column name not found.
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//
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THROW( CPListException(QPARSE_E_NO_SUCH_SORT_PROPERTY, 0) );
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}
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pDbColId = (CDbColId *)pdbid;
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if ( fFirstGroupingColumn )
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{
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fFirstGroupingColumn = FALSE;
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if ( !pDbNestingNode->AddParentColumn(psBookmark) )
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{
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// Report a failure.
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THROW( CException(STATUS_INSUFFICIENT_RESOURCES) );
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}
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}
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if ( !pDbNestingNode->AddParentColumn(*pDbColId) )
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{
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// Report a failure.
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THROW( CException(STATUS_INSUFFICIENT_RESOURCES) );
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}
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BOOL fFail = _fKeepFriendlyNames ?
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!pDbNestingNode->AddGroupingColumn(*pDbColId, pwszColumnName.GetPointer()) :
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!pDbNestingNode->AddGroupingColumn(*pDbColId);
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if (fFail)
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{
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// Report a failure.
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THROW( CException(STATUS_INSUFFICIENT_RESOURCES) );
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}
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//
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// Add the column to the sort node in case we will need it.
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//
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CDbSortKey sortKey( *pDbColId, order == QUERY_SORTDESCEND );
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if ( !_xSortNode->AddSortColumn(sortKey) )
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{
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// Report a failure.
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THROW( CException(STATUS_INSUFFICIENT_RESOURCES) );
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}
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pwszColumnName.Free();
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//
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// Skip over +'s seperating grouping columns
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//
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if ( _Scanner.LookAhead() == PLUS_TOKEN )
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{
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// We don't support this syntax (or document it)
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//_Scanner.Accept(); // Remove the '+'
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THROW( CPListException(QPARSE_E_INVALID_GROUPING, 0) );
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}
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//
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// Find a new grouping specification if a comma is found
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if ( _Scanner.LookAhead() == COMMA_TOKEN )
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{
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break;
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}
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}
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return xDbNestingNode.Acquire();
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CParseGrouping::ParseGroupingType, private
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//
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// Synopsis: Parses and returns the grouping type.
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//
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// Arguments: -NONE-
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//
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// Returns: ECategoryType - grouping type found if valid
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//
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// Notes: Upon return, the scanner is advanced past the grouping type.
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// Throws CPListException in case of syntax errors
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//
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// History: 10 Apr 1997 AlanW Created.
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//
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//----------------------------------------------------------------------------
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CParseGrouping::ECategoryType CParseGrouping::ParseGroupingType( )
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{
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Win4Assert( _Scanner.LookAhead() == W_OPEN_TOKEN );
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_Scanner.Accept(); // Remove the '['
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XPtrST<WCHAR> pwszCategoryName( _Scanner.AcqWord() );
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ECategoryType CatType = eInvalidCategory;
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if ( pwszCategoryName.IsNull() )
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THROW( CPListException(QPARSE_E_INVALID_GROUPING, 0) );
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if ( _wcsicmp( pwszCategoryName.GetPointer(), L"unique" ) == 0 )
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{
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CatType = eUnique;
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}
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else if ( _wcsicmp( pwszCategoryName.GetPointer(), L"quantile" ) == 0 )
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{
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CatType = eBuckets;
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}
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else if ( _wcsicmp( pwszCategoryName.GetPointer(), L"cluster" ) == 0 )
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{
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CatType = eCluster;
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}
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else if ( _wcsicmp( pwszCategoryName.GetPointer(), L"range" ) == 0 )
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{
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CatType = eRange;
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}
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else if ( _wcsicmp( pwszCategoryName.GetPointer(), L"time" ) == 0 )
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{
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CatType = eTime;
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}
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else if ( _wcsicmp( pwszCategoryName.GetPointer(), L"alpha" ) == 0 )
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{
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CatType = eAlpha;
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}
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else
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{
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// Report an error
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THROW( CPListException(QPARSE_E_INVALID_GROUPING, 0) );
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}
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_Scanner.AcceptWord(); // Remove the grouping type name
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if ( _Scanner.LookAhead() != W_CLOSE_TOKEN )
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{
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// Report an error
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THROW( CPListException(QPARSE_E_EXPECTING_BRACE, 0) );
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}
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_Scanner.Accept(); // Remove the ']' character
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return CatType;
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CParseGrouping::AddSortList, private
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//
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// Synopsis: Add sort columns.
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//
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// Arguments: [SortNode] - a smart pointer to the sort node to be added
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//
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// Notes: A sort list is added below the lowermost nesting node.
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// If there already is a sort node there, the sort columns are
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// appended to the list.
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//
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// History: 21 Apr 1997 AlanW Created.
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//
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//----------------------------------------------------------------------------
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void CParseGrouping::AddSortList( XPtr<CDbSortNode> & SortNode )
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{
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Win4Assert( _cNestings > 0 );
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CDbNestingNode * pNode = _xNode.GetPointer();
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for (unsigned i=1; i < _cNestings; i++)
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{
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Win4Assert( pNode->GetCommandType() == DBOP_nesting );
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pNode = (CDbNestingNode *)pNode->GetFirstChild();
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}
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Win4Assert( pNode != 0 &&
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(pNode->GetFirstChild()->GetCommandType() == DBOP_project_list_anchor ||
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pNode->GetFirstChild()->GetCommandType() == DBOP_sort ));
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if (pNode->GetFirstChild()->GetCommandType() == DBOP_project_list_anchor)
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{
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// No sort node yet. Add a node.
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if (_xSortNode.GetPointer())
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{
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pNode->AddTable( _xSortNode.Acquire() );
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if ( 0 == SortNode.GetPointer() )
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{
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//
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// If called with _xSortNode, the Acquire above cleared the
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// smart pointer. We're done.
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//
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return;
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}
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}
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else
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{
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pNode->AddTable( SortNode.Acquire() );
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return;
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}
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}
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Win4Assert(pNode->GetFirstChild()->GetCommandType() == DBOP_sort);
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Win4Assert(pNode->GetFirstChild()->GetFirstChild()->GetCommandType() == DBOP_sort_list_anchor);
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Win4Assert(0 == _xSortNode.GetPointer());
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// The sort list elements from SortNode will be carved off and appended
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// to the list in pSLA.
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CDbSortListAnchor * pSLA = (CDbSortListAnchor *)pNode->GetFirstChild()->GetFirstChild();
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Win4Assert(SortNode.GetPointer() != 0);
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Win4Assert(SortNode->GetCommandType() == DBOP_sort);
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Win4Assert(SortNode->GetFirstChild()->GetCommandType() == DBOP_sort_list_anchor);
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XPtr<CDbSortListElement> xSLE ( (CDbSortListElement *) SortNode->GetFirstChild()->AcquireChildren() );
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if (xSLE.GetPointer())
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{
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pSLA->AppendList( xSLE.GetPointer() );
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xSLE.Acquire();
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}
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}
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