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488 lines
14 KiB
488 lines
14 KiB
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 2000.
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//
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// File: dbcmdop.cxx
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//
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// Contents: Wrapper classes for DBCOMMANDTREE structure
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//
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// Classes: CDbSelectNode
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// CDbProjectNode
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// CDbProjectListAnchor
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// CDbSortNode
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// CDbSortListAnchor
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// CDbNestingNode
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//
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// History: 6-15-95 srikants 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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//+---------------------------------------------------------------------------
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//
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// Method: CDbSelectNode::CDbSelectNode
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//
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// Synopsis: Construct a select node.
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//
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// Arguments: -NONE-
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//
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// History: 6-15-95 srikants Created
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//
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// Notes: Only the normal select can be created. For OFS,
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// order-preserving functions identially with normal select.
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//
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//----------------------------------------------------------------------------
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CDbSelectNode::CDbSelectNode( )
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: CDbCmdTreeNode( DBOP_select )
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{
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CDbTableId * pTableId = new CDbTableId( DBTABLEID_NAME );
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if ( 0 != pTableId )
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{
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if ( pTableId->IsValid() )
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{
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InsertChild( pTableId );
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}
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else
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{
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delete pTableId;
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}
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CDbSelectNode::SetRestriction
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//
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// Synopsis: Set the restriction expression
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//
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// Arguments: [pRestr] - restriction expression to be set.
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//
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// History: 6-15-95 srikants Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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BOOL CDbSelectNode::SetRestriction( CDbCmdTreeNode * pRestr )
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{
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if ( IsValid() &&
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GetFirstChild() &&
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GetFirstChild()->GetNextSibling() != 0 )
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{
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//
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// Restriction expression already set on node. Remove and
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// replace it.
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//
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CDbCmdTreeNode * pTableNode = RemoveFirstChild();
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CDbCmdTreeNode * pOldRst = RemoveFirstChild();
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Win4Assert( 0 == GetFirstChild() ); // don't expect any more children
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delete pOldRst;
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InsertChild(pTableNode);
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}
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return AddRestriction(pRestr);
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CDbListAnchor::_AppendListElement
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//
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// Synopsis: Helper function to add a list-element node and the given
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// column node to the anchor.
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//
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// Arguments: [eleType] - The type of the element node.
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// [pColumn] - The column specification node. This will be made
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// the child of the newly created list element.
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//
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// Returns: TRUE if successful; FALSE otherwise.
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//
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// History: 11-16-95 srikants Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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BOOL CDbListAnchor::_AppendListElement( DBCOMMANDOP eleType, CDbColumnNode * pColumn )
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{
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Win4Assert( _IsValidListElement( eleType ) );
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Win4Assert( 0 != pColumn );
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CDbCmdTreeNode * pLE = new CDbCmdTreeNode( eleType );
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if ( 0 != pLE )
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{
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pLE->InsertChild( pColumn );
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AppendChild( pLE );
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}
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return (0 != pLE);
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CDbListAnchor::AppendList, protected
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//
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// Synopsis: Appends a list of elements to a list anchor
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//
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// Arguments: [pListElement] - pointer to head list element
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//
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// Returns: BOOL - TRUE if successful, FALSE otherwise
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//
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// History: 17 Aug 1995 AlanW Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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BOOL CDbListAnchor::AppendList( CDbCmdTreeNode * pListElement )
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{
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Win4Assert( _IsValidListElement( pListElement->GetCommandType() ));
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Win4Assert( pListElement->GetFirstChild() != 0 );
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AppendChild( pListElement );
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return TRUE;
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CDbListAnchor::AppendListElement, protected
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//
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// Synopsis: Appends a single element to a list anchor
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//
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// Arguments: [pListElement] - pointer to list element
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//
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// Returns: BOOL - TRUE if successful, FALSE otherwise
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//
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// History: 17 Aug 1995 AlanW Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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BOOL CDbListAnchor::AppendListElement( CDbCmdTreeNode * pListElement )
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{
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Win4Assert( _IsValidListElement( pListElement->GetCommandType() ) &&
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pListElement->GetNextSibling() == 0 );
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Win4Assert( pListElement->GetFirstChild() != 0 );
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AppendChild( pListElement );
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return TRUE;
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CDbListAnchor::AppendListElement, protected
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//
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// Synopsis:
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//
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// Arguments: [eleType] - list element type
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// [PropSpec] - Full property spec of column to add
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//
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// Returns: BOOL - TRUE if successful, FALSE otherwise
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//
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// History: 6-15-95 srikants Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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BOOL CDbListAnchor::AppendListElement( DBCOMMANDOP eleType,
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const DBID & PropSpec)
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{
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XPtr<CDbColumnNode> pColumn( new CDbColumnNode( PropSpec, TRUE ) );
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if ( 0 == pColumn.GetPointer() || !pColumn->IsValid() )
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return FALSE;
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if ( _AppendListElement( eleType, pColumn.GetPointer() ) )
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{
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pColumn.Acquire();
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return TRUE;
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}
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else
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{
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return FALSE;
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CDbProjectListAnchor::AppendListElement, public
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//
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// Synopsis: Add a project_list_element node to the end of the list
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//
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// Arguments: [propSpec] - column to be added to the list
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// [pwszName] - name of column
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//
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// Returns: BOOL - TRUE if successful, FALSE otherwise
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//
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// History: 6-15-95 srikants Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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BOOL CDbProjectListAnchor::AppendListElement( const DBID & propSpec, LPWSTR pwszName )
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{
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BOOL fSuccess = FALSE;
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XPtr<CDbProjectListElement> pListElem( new CDbProjectListElement( ) );
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if ( 0 == pListElem.GetPointer() )
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return FALSE;
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if ( !pListElem->SetName(pwszName) )
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return FALSE;
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XPtr<CDbColumnNode> pColumn( new CDbColumnNode( propSpec, TRUE ) );
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if ( 0 == pColumn.GetPointer() || !pColumn->IsValid() )
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return FALSE;
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if ( pListElem->SetColumn( pColumn.GetPointer() ) )
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pColumn.Acquire();
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else
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return FALSE;
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AppendChild( pListElem.GetPointer() );
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pListElem.Acquire();
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return TRUE;
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CDbProjectNode::_FindOrAddAnchor, private
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//
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// Synopsis: Return the project list anchor node. Add one if there
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// isn't one.
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//
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// Returns: CDbProjectListAnchor* - pointer to the anchor node, or NULL
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// if there was an allocation failure.
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//
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// History: 6-15-95 srikants Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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CDbProjectListAnchor * CDbProjectNode::_FindOrAddAnchor()
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{
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CDbCmdTreeNode * pChild = GetFirstChild();
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while ( 0 != pChild )
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{
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if (pChild->IsListAnchor())
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{
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Win4Assert( DBOP_project_list_anchor == pChild->GetCommandType() );
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return (CDbProjectListAnchor *)pChild;
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}
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pChild = pChild->GetNextSibling();
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}
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CDbProjectListAnchor * pAnchor = new CDbProjectListAnchor();
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if ( 0 != pAnchor )
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{
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AppendChild( pAnchor );
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}
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return pAnchor;
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CDbSortNode::_FindOrAddAnchor, private
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//
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// Synopsis: Return the sort list anchor node. Add one if there
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// isn't one.
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//
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// Returns: CDbSortListAnchor* - pointer to the anchor node, or NULL
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// if there was an allocation failure.
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//
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// History: 6-15-95 srikants Created
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//
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// Notes: We should probably implement this in a base class
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// with the method taking the list anchor type.
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//
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//----------------------------------------------------------------------------
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CDbSortListAnchor * CDbSortNode::_FindOrAddAnchor()
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{
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CDbCmdTreeNode * pChild = GetFirstChild();
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while ( 0 != pChild )
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{
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if (pChild->IsListAnchor())
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{
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Win4Assert( DBOP_sort_list_anchor == pChild->GetCommandType() );
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return (CDbSortListAnchor *)pChild;
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}
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pChild = pChild->GetNextSibling();
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}
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CDbSortListAnchor * pAnchor = new CDbSortListAnchor();
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if ( 0 != pAnchor )
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{
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AppendChild( pAnchor );
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}
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return pAnchor;
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CDbSortNode::AddSortColumn, public
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//
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// Synopsis: Add a sort column to the sort list.
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//
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// Returns: TRUE if successful, FALSE otherwise (allocation failure).
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//
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// History: 17 Aug 1995 AlanW Created
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//
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// Notes: Sort lists consist of a sort list anchor, with a chain
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// of sort list elements as children. Each sort list element
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// has information pertaining to the sort (direction and locale)
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// and one child which is a column specification.
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//
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//----------------------------------------------------------------------------
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BOOL CDbSortNode::AddSortColumn(DBID const & propSpec,
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BOOL fDirection,
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LCID locale)
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{
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CDbSortListAnchor * pAnchor = _FindOrAddAnchor();
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XPtr<CDbColumnNode> pCol( new CDbColumnNode( propSpec, TRUE ) );
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if ( 0 == pCol.GetPointer() || 0 == pAnchor || !pCol->IsValid() )
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return FALSE;
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CDbSortListElement * pSortInfo = new CDbSortListElement( fDirection,
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locale );
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if ( 0 != pSortInfo )
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{
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if ( pSortInfo->IsValid() )
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{
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pSortInfo->AddColumn( pCol.Acquire() );
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if ( pAnchor->AppendListElement( pSortInfo ) )
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return TRUE;
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}
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delete pSortInfo;
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}
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return FALSE;
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} //AddSortColumn
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//+---------------------------------------------------------------------------
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//
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// Method: CDbNestingNode::AddTable, public
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//
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// Synopsis: Add a table node to a nesting. Remove an existing
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// table node if there is one there.
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//
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// Arguments: [pTable] - node to be added to tree. Ownership passes
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// to the command tree.
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//
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// Returns: BOOL - TRUE if operation worked
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//
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// History: 08 Aug 1995 AlanW Created
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//
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// Notes: Nesting nodes are expected to have 0, 1, 4 or 5 child
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// nodes depending upon whether AddTable and _FindGroupListAnchor
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// have been called.
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//
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//----------------------------------------------------------------------------
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BOOL CDbNestingNode::AddTable( CDbCmdTreeNode * pTable )
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{
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Win4Assert (! pTable->IsListAnchor());
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CDbCmdTreeNode * pChild = GetFirstChild();
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if ( 0 != pChild && ! pChild->IsListAnchor())
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{
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// Found a table??? Assert on this; we could be nice to the
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// caller and replace it.
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Win4Assert ( ! pChild->IsListAnchor() );
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return FALSE;
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}
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InsertChild( pTable );
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return TRUE;
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CDbNestingNode::_FindGroupListAnchor, private
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//
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// Synopsis: Return the group list anchor node. If there is none,
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// add it and the parent list node, the child list node and
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// the grouping column node.
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//
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// Returns: CDbProjectListAnchor* - pointer to the anchor node, or NULL
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// if there was an allocation failure.
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//
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// History: 08 Aug 1995 AlanW Created
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//
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// Notes: Nesting nodes are expected to have 0, 1, 4 or 5 child
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// nodes depending upon whether AddTable and _FindGroupListAnchor
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// have been called.
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//
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//----------------------------------------------------------------------------
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CDbProjectListAnchor * CDbNestingNode::_FindGroupListAnchor()
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{
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CDbCmdTreeNode * pChild = GetFirstChild();
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if ( 0 != pChild )
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{
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if (! pChild->IsListAnchor())
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{
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pChild = pChild->GetNextSibling();
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}
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if ( 0 != pChild )
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{
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Win4Assert( DBOP_project_list_anchor == pChild->GetCommandType() );
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return (CDbProjectListAnchor *)pChild;
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}
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}
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XPtr<CDbProjectListAnchor> pGroupList = new CDbProjectListAnchor();
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XPtr<CDbProjectListAnchor> pParentList = new CDbProjectListAnchor();
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XPtr<CDbProjectListAnchor> pChildList = new CDbProjectListAnchor();
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XPtr<CDbColumnNode> pGroupColumn = new CDbColumnNode(
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//, PROPID_CHAPTER
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);
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if ( ! pGroupList.IsNull() &&
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! pParentList.IsNull() &&
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! pChildList.IsNull() &&
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! pGroupColumn.IsNull() )
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{
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pGroupList->AppendSibling(pGroupColumn.Acquire());
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pGroupList->InsertSibling(pChildList.Acquire());
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pGroupList->InsertSibling(pParentList.Acquire());
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AppendChild(pGroupList.GetPointer());
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return pGroupList.Acquire();
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}
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return 0;
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}
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