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:	17
Committed:	Sat Dec 28 19:22:24 2013 UTC (10 years, 11 months ago) by tony
Content type:	text/x-pascal
File size:	6862 byte(s)
Log Message:	Committing updates for Release R1-0-5
#	Content
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	{ 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	{************************************************************************}
33
34	unit IBUpdateSQL;
35
36	{$Mode Delphi}
37
38	interface
39
40	uses SysUtils, Classes, DB, IB, IBCustomDataSet, IBSQL;
41
42	type
43	{ TIBUpdateSQL }
44
45	TIBUpdateSQL = class(TIBDataSetUpdateObject)
46	private
47	FDataSet: TIBCustomDataSet;
48	FQueries: array[TUpdateKind] of TIBSQL;
49	FSQLText: array[TUpdateKind] of TStrings;
50	function GetQuery(UpdateKind: TUpdateKind): TIBSQL;
51	function GetSQLIndex(Index: Integer): TStrings;
52	procedure SetSQL(UpdateKind: TUpdateKind; Value: TStrings);
53	procedure SetSQLIndex(Index: Integer; Value: TStrings);
54	protected
55	procedure InternalPrepare(UpdateKind: TUpdateKind);
56	function GetSQL(UpdateKind: TUpdateKind): TStrings; override;
57	function GetDataSet: TIBCustomDataSet; override;
58	procedure SetDataSet(ADataSet: TIBCustomDataSet); override;
59	procedure SQLChanged(Sender: TObject);
60	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); override;
61	procedure ExecSQL(UpdateKind: TUpdateKind);
62	public
63	constructor Create(AOwner: TComponent); override;
64	destructor Destroy; override;
65	property DataSet;
66	property Query[UpdateKind: TUpdateKind]: TIBSQL read GetQuery;
67	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	uses Variants;
77
78	{ 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	InternalPrepare(UpdateKind);
106	with Query[UpdateKind] do
107	begin
108	ExecQuery;
109	if RowsAffected <> 1 then IBError(ibxeUpdateFailed, [nil]);
110	end;
111	end;
112
113	function TIBUpdateSQL.GetQuery(UpdateKind: TUpdateKind): TIBSQL;
114	begin
115	if not Assigned(FQueries[UpdateKind]) then
116	begin
117	FQueries[UpdateKind] := TIBSQL.Create(Self);
118	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	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	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	procedure TIBUpdateSQL.Apply(UpdateKind: TUpdateKind; buff: PChar);
182	begin
183	if not Assigned(FDataSet) then Exit;
184	InternalPrepare(UpdateKind);
185	InternalSetParams(Query[UpdateKind],buff);
186	ExecSQL(UpdateKind);
187	end;
188
189	end.