trunk/runtime/IBUpdateSQL.pas

{************************************************************************}
{                                                                        }
{       Borland Delphi Visual Component Library                          }
{       InterBase Express core components                                }
{                                                                        }
{       Copyright (c) 1998-2000 Inprise Corporation                      }
{                                                                        }
{    InterBase Express is based in part on the product                   }
{    Free IB Components, written by Gregory H. Deatz for                 }
{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
{    Free IB Components is used under license.                           }
{                                                                        }
{    The contents of this file are subject to the InterBase              }
{    Public License Version 1.0 (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.Inprise.com/IPL.html }
{    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 was created by InterBase Software Corporation     }
{       and its successors.                                              }
{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
{       Corporation. All Rights Reserved.                                }
{    Contributor(s): Jeff Overcash                                       }
{                                                                        }
{    IBX For Lazarus (Firebird Express)                                  }
{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
{    Portions created by MWA Software are copyright McCallum Whyman      }
{    Associates Ltd 2011                                                 }
{                                                                        }
{************************************************************************}

unit IBUpdateSQL;

{$Mode Delphi}

interface

uses SysUtils, Classes, DB, IB, IBCustomDataSet, IBSQL;

type
{ TIBUpdateSQL }

  TIBUpdateSQL = class(TIBDataSetUpdateObject)
  private
    FDataSet: TIBCustomDataSet;
    FQueries: array[TUpdateKind] of TIBSQL;
    FSQLText: array[TUpdateKind] of TStrings;
    function GetQuery(UpdateKind: TUpdateKind): TIBSQL;
    function GetSQLIndex(Index: Integer): TStrings;
    procedure SetSQL(UpdateKind: TUpdateKind; Value: TStrings);
    procedure SetSQLIndex(Index: Integer; Value: TStrings);
  protected
    procedure InternalPrepare(UpdateKind: TUpdateKind);
    function GetSQL(UpdateKind: TUpdateKind): TStrings; override;
    function GetDataSet: TIBCustomDataSet; override;
    procedure SetDataSet(ADataSet: TIBCustomDataSet); override;
    procedure SQLChanged(Sender: TObject);
    procedure Apply(UpdateKind: TUpdateKind; buff: PChar); override;
    procedure ExecSQL(UpdateKind: TUpdateKind);
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    property DataSet;
    property Query[UpdateKind: TUpdateKind]: TIBSQL read GetQuery;
    property SQL[UpdateKind: TUpdateKind]: TStrings read GetSQL write SetSQL;
  published
    property ModifySQL: TStrings index 0 read GetSQLIndex write SetSQLIndex;
    property InsertSQL: TStrings index 1 read GetSQLIndex write SetSQLIndex;
    property DeleteSQL: TStrings index 2 read GetSQLIndex write SetSQLIndex;
  end;

implementation

uses Variants;

{ TIBUpdateSQL }

constructor TIBUpdateSQL.Create(AOwner: TComponent);
var
  UpdateKind: TUpdateKind;
begin
  inherited Create(AOwner);
  for UpdateKind := Low(TUpdateKind) to High(TUpdateKind) do
  begin
    FSQLText[UpdateKind] := TStringList.Create;
    TStringList(FSQLText[UpdateKind]).OnChange := SQLChanged;
  end;
end;

destructor TIBUpdateSQL.Destroy;
var
  UpdateKind: TUpdateKind;
begin
  if Assigned(FDataSet) and (FDataSet.UpdateObject = Self) then
    FDataSet.UpdateObject := nil;
  for UpdateKind := Low(TUpdateKind) to High(TUpdateKind) do
    FSQLText[UpdateKind].Free;
  inherited Destroy;
end;

procedure TIBUpdateSQL.ExecSQL(UpdateKind: TUpdateKind);
begin
  InternalPrepare(UpdateKind);
  with Query[UpdateKind] do
  begin
    ExecQuery;
    if RowsAffected <> 1 then IBError(ibxeUpdateFailed, [nil]);
  end;
end;

function TIBUpdateSQL.GetQuery(UpdateKind: TUpdateKind): TIBSQL;
begin
  if not Assigned(FQueries[UpdateKind]) then
  begin
    FQueries[UpdateKind] := TIBSQL.Create(Self);
    FQueries[UpdateKind].SQL.Assign(FSQLText[UpdateKind]);
    if (FDataSet is TIBCustomDataSet) then
    begin
      FQueries[UpdateKind].Database := TIBCustomDataSet(FDataSet).DataBase;
      FQueries[UpdateKind].Transaction := TIBCustomDataSet(FDataSet).Transaction;
    end;
  end;
  Result := FQueries[UpdateKind];
end;

function TIBUpdateSQL.GetSQL(UpdateKind: TUpdateKind): TStrings;
begin
  Result := FSQLText[UpdateKind];
end;

function TIBUpdateSQL.GetSQLIndex(Index: Integer): TStrings;
begin
  Result := FSQLText[TUpdateKind(Index)];
end;

function TIBUpdateSQL.GetDataSet: TIBCustomDataSet;
begin
  Result := FDataSet;
end;

procedure TIBUpdateSQL.SetDataSet(ADataSet: TIBCustomDataSet);
begin
  FDataSet := ADataSet;
end;

procedure TIBUpdateSQL.SetSQL(UpdateKind: TUpdateKind; Value: TStrings);
begin
  FSQLText[UpdateKind].Assign(Value);
end;

procedure TIBUpdateSQL.SetSQLIndex(Index: Integer; Value: TStrings);
begin
  SetSQL(TUpdateKind(Index), Value);
end;

procedure TIBUpdateSQL.InternalPrepare(UpdateKind: TUpdateKind);
begin
  with Query[UpdateKind] do
  begin
    with Transaction do
      if not InTransaction then StartTransaction;
    if not Prepared then Prepare;
  end;
end;

procedure TIBUpdateSQL.SQLChanged(Sender: TObject);
var
  UpdateKind: TUpdateKind;
begin
  for UpdateKind := Low(TUpdateKind) to High(TUpdateKind) do
    if Sender = FSQLText[UpdateKind] then
    begin
      if Assigned(FQueries[UpdateKind]) then
        FQueries[UpdateKind].SQL.Assign(FSQLText[UpdateKind]);
      Break;
    end;
end;

procedure TIBUpdateSQL.Apply(UpdateKind: TUpdateKind; buff: PChar);
begin
  if not Assigned(FDataSet) then Exit;
  InternalPrepare(UpdateKind);
  InternalSetParams(Query[UpdateKind],buff);
  ExecSQL(UpdateKind);
end;

end.
Revision:	7
Committed:	Sun Aug 5 18:28:19 2012 UTC (11 years, 8 months ago) by tony
Content type:	text/x-pascal
File size:	6673 byte(s)
Log Message:	Committing updates for Release R1-0-0
#	User	Rev	Content
1	tony	1	{************************************************************************}
2			{ }
3			{ Borland Delphi Visual Component Library }
4			{ InterBase Express core components }
5			{ }
6			{ Copyright (c) 1998-2000 Inprise Corporation }
7			{ }
8			{ InterBase Express is based in part on the product }
9			{ Free IB Components, written by Gregory H. Deatz for }
10			{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
11			{ Free IB Components is used under license. }
12			{ }
13			{ The contents of this file are subject to the InterBase }
14			{ Public License Version 1.0 (the "License"); you may not }
15			{ use this file except in compliance with the License. You }
16			{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17			{ Software distributed under the License is distributed on }
18			{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
19			{ express or implied. See the License for the specific language }
20			{ governing rights and limitations under the License. }
21			{ The Original Code was created by InterBase Software Corporation }
22			{ and its successors. }
23			{ Portions created by Inprise Corporation are Copyright (C) Inprise }
24			{ Corporation. All Rights Reserved. }
25			{ Contributor(s): Jeff Overcash }
26			{ }
27	tony	7	{ IBX For Lazarus (Firebird Express) }
28			{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29			{ Portions created by MWA Software are copyright McCallum Whyman }
30			{ Associates Ltd 2011 }
31			{ }
32	tony	1	{************************************************************************}
33
34			unit IBUpdateSQL;
35
36	tony	5	{$Mode Delphi}
37
38	tony	1	interface
39
40	tony	7	uses SysUtils, Classes, DB, IB, IBCustomDataSet, IBSQL;
41	tony	1
42			type
43			{ TIBUpdateSQL }
44
45			TIBUpdateSQL = class(TIBDataSetUpdateObject)
46			private
47			FDataSet: TIBCustomDataSet;
48	tony	7	FQueries: array[TUpdateKind] of TIBSQL;
49	tony	1	FSQLText: array[TUpdateKind] of TStrings;
50	tony	7	function GetQuery(UpdateKind: TUpdateKind): TIBSQL;
51	tony	1	function GetSQLIndex(Index: Integer): TStrings;
52			procedure SetSQL(UpdateKind: TUpdateKind; Value: TStrings);
53			procedure SetSQLIndex(Index: Integer; Value: TStrings);
54			protected
55	tony	7	procedure InternalPrepare(UpdateKind: TUpdateKind);
56	tony	1	function GetSQL(UpdateKind: TUpdateKind): TStrings; override;
57			function GetDataSet: TIBCustomDataSet; override;
58			procedure SetDataSet(ADataSet: TIBCustomDataSet); override;
59			procedure SQLChanged(Sender: TObject);
60	tony	7	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); override;
61			procedure ExecSQL(UpdateKind: TUpdateKind);
62	tony	1	public
63			constructor Create(AOwner: TComponent); override;
64			destructor Destroy; override;
65			property DataSet;
66	tony	7	property Query[UpdateKind: TUpdateKind]: TIBSQL read GetQuery;
67	tony	1	property SQL[UpdateKind: TUpdateKind]: TStrings read GetSQL write SetSQL;
68			published
69			property ModifySQL: TStrings index 0 read GetSQLIndex write SetSQLIndex;
70			property InsertSQL: TStrings index 1 read GetSQLIndex write SetSQLIndex;
71			property DeleteSQL: TStrings index 2 read GetSQLIndex write SetSQLIndex;
72			end;
73
74			implementation
75
76	tony	5	uses Variants;
77
78	tony	1	{ TIBUpdateSQL }
79
80			constructor TIBUpdateSQL.Create(AOwner: TComponent);
81			var
82			UpdateKind: TUpdateKind;
83			begin
84			inherited Create(AOwner);
85			for UpdateKind := Low(TUpdateKind) to High(TUpdateKind) do
86			begin
87			FSQLText[UpdateKind] := TStringList.Create;
88			TStringList(FSQLText[UpdateKind]).OnChange := SQLChanged;
89			end;
90			end;
91
92			destructor TIBUpdateSQL.Destroy;
93			var
94			UpdateKind: TUpdateKind;
95			begin
96			if Assigned(FDataSet) and (FDataSet.UpdateObject = Self) then
97			FDataSet.UpdateObject := nil;
98			for UpdateKind := Low(TUpdateKind) to High(TUpdateKind) do
99			FSQLText[UpdateKind].Free;
100			inherited Destroy;
101			end;
102
103			procedure TIBUpdateSQL.ExecSQL(UpdateKind: TUpdateKind);
104			begin
105	tony	7	InternalPrepare(UpdateKind);
106	tony	1	with Query[UpdateKind] do
107			begin
108	tony	7	ExecQuery;
109	tony	1	if RowsAffected <> 1 then IBError(ibxeUpdateFailed, [nil]);
110			end;
111			end;
112
113	tony	7	function TIBUpdateSQL.GetQuery(UpdateKind: TUpdateKind): TIBSQL;
114	tony	1	begin
115			if not Assigned(FQueries[UpdateKind]) then
116			begin
117	tony	7	FQueries[UpdateKind] := TIBSQL.Create(Self);
118	tony	1	FQueries[UpdateKind].SQL.Assign(FSQLText[UpdateKind]);
119			if (FDataSet is TIBCustomDataSet) then
120			begin
121			FQueries[UpdateKind].Database := TIBCustomDataSet(FDataSet).DataBase;
122			FQueries[UpdateKind].Transaction := TIBCustomDataSet(FDataSet).Transaction;
123			end;
124			end;
125			Result := FQueries[UpdateKind];
126			end;
127
128			function TIBUpdateSQL.GetSQL(UpdateKind: TUpdateKind): TStrings;
129			begin
130			Result := FSQLText[UpdateKind];
131			end;
132
133			function TIBUpdateSQL.GetSQLIndex(Index: Integer): TStrings;
134			begin
135			Result := FSQLText[TUpdateKind(Index)];
136			end;
137
138			function TIBUpdateSQL.GetDataSet: TIBCustomDataSet;
139			begin
140			Result := FDataSet;
141			end;
142
143			procedure TIBUpdateSQL.SetDataSet(ADataSet: TIBCustomDataSet);
144			begin
145			FDataSet := ADataSet;
146			end;
147
148			procedure TIBUpdateSQL.SetSQL(UpdateKind: TUpdateKind; Value: TStrings);
149			begin
150			FSQLText[UpdateKind].Assign(Value);
151			end;
152
153			procedure TIBUpdateSQL.SetSQLIndex(Index: Integer; Value: TStrings);
154			begin
155			SetSQL(TUpdateKind(Index), Value);
156			end;
157
158	tony	7	procedure TIBUpdateSQL.InternalPrepare(UpdateKind: TUpdateKind);
159			begin
160			with Query[UpdateKind] do
161			begin
162			with Transaction do
163			if not InTransaction then StartTransaction;
164			if not Prepared then Prepare;
165			end;
166			end;
167
168	tony	1	procedure TIBUpdateSQL.SQLChanged(Sender: TObject);
169			var
170			UpdateKind: TUpdateKind;
171			begin
172			for UpdateKind := Low(TUpdateKind) to High(TUpdateKind) do
173			if Sender = FSQLText[UpdateKind] then
174			begin
175			if Assigned(FQueries[UpdateKind]) then
176			FQueries[UpdateKind].SQL.Assign(FSQLText[UpdateKind]);
177			Break;
178			end;
179			end;
180
181	tony	7	procedure TIBUpdateSQL.Apply(UpdateKind: TUpdateKind; buff: PChar);
182	tony	1	begin
183			if not Assigned(FDataSet) then Exit;
184	tony	7	InternalPrepare(UpdateKind);
185			InternalSetParams(Query[UpdateKind],buff);
186	tony	1	ExecSQL(UpdateKind);
187			end;
188
189			end.