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{
This file is part of the Free Pascal run time library.
Copyright (c) 2007 by Michael Van Canneyt, member of the
Free Pascal development team
Data Dictionary Code Generator Implementation.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
unit fpcgsqlconst;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, fpddCodeGen;
Type
{ TDDSQLConstOptions }
TMode = (mConst,mTStrings);
TDDSQLConstOptions = Class(TCodeGeneratorOptions)
private
FIDent: String;
FMode: TMode;
procedure SetIdent(const AValue: String);
Public
Constructor Create; override;
Procedure Assign(ASource : TPersistent); override;
Published
Property Identifier : String Read FIDent Write SetIdent;
Property Mode : TMode Read FMode Write FMode;
end;
{ TDDSQLConstGenerator }
TDDSQLConstGenerator = Class(TDDCustomCodeGenerator)
Private
FSQL : TStrings;
Protected
Function CreateOptions : TCodeGeneratorOptions; override;
Procedure DoGenerateInterface(Strings: TStrings); override;
Procedure DoGenerateImplementation(Strings: TStrings); override;
function GetSQL: TStrings; override;
procedure SetSQL(const AValue: TStrings); override;
Function SQLOptions : TDDSQLConstOptions;
Public
Constructor Create(AOwner : TComponent); override;
Destructor Destroy; override;
Class Function NeedsSQL : Boolean; override;
Class Function NeedsFieldDefs : Boolean; override;
end;
Const
SSQLConst = 'SQLConst';
Resourcestring
SSQLConstDescr = 'Generate Pascal constant/Stringlist from SQL';
implementation
{ TDDSQLConstOptions }
procedure TDDSQLConstOptions.SetIdent(const AValue: String);
begin
if FIDent=AValue then exit;
If Not IsValidIdent(AValue) then
Raise ECodeGenerator.CreateFmt(SErrInvalidIdentifier,[AValue]);
FIDent:=AValue;
end;
constructor TDDSQLConstOptions.Create;
begin
Inherited;
FIdent:='SQL'; // Do not localize
end;
procedure TDDSQLConstOptions.Assign(ASource: TPersistent);
Var
CO: TDDSQLConstOptions;
begin
If ASource is TDDSQLConstOptions then
begin
CO:=ASource as TDDSQLConstOptions;
FIDent:=CO.FIdent;
FMode:=CO.FMode;
end;
inherited Assign(ASource);
end;
{ TDDSQLConstGenerator }
function TDDSQLConstGenerator.CreateOptions: TCodeGeneratorOptions;
begin
Result:=TDDSQLConstOptions.Create;
end;
procedure TDDSQLConstGenerator.DoGenerateInterface(Strings: TStrings);
Var
S : String;
I,L : Integer;
begin
If (SQLOptions.Mode=mConst) then
begin
Addln(Strings,'Const');
L:=Length(SQLOPtions.Identifier);
IncIndent;
try
For I:=0 to FSQL.Count-1 do
begin
If (I=0) then
S:=SQLOPtions.Identifier+' = '
else
S:=StringOfChar(' ',L)+' +';
S:=S+CreateString(FSQL[i]);
If (I=FSQL.Count-1) then
S:=S+';'
else
S:=S+'+sLineBreak';
Addln(Strings,S);
end;
finally
DecIndent;
end;
end;
end;
procedure TDDSQLConstGenerator.DoGenerateImplementation(Strings: TStrings);
Var
S : String;
I,L : Integer;
begin
If (SQLOptions.Mode=mTStrings) then
begin
Addln(Strings,'With %s do',[SQLOPtions.Identifier]);
IncIndent;
try
Addln(Strings,'begin');
For I:=0 to FSQL.Count-1 do
Addln(Strings,'Add(%s);',[CreateString(FSQL[i])]);
Addln(Strings,'end;');
finally
DecIndent;
end;
end;
end;
function TDDSQLConstGenerator.GetSQL: TStrings;
begin
Result:=FSQL;
end;
procedure TDDSQLConstGenerator.SetSQL(const AValue: TStrings);
begin
FSQL.Assign(AValue);
end;
function TDDSQLConstGenerator.SQLOptions: TDDSQLConstOptions;
begin
Result:=CodeOptions as TDDSQLConstOptions;
end;
constructor TDDSQLConstGenerator.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FSQL:=TSTringList.Create;
end;
destructor TDDSQLConstGenerator.Destroy;
begin
FreeAndNil(FSQL);
inherited Destroy;
end;
class function TDDSQLConstGenerator.NeedsSQL: Boolean;
begin
Result:=True;
end;
class function TDDSQLConstGenerator.NeedsFieldDefs: Boolean;
begin
Result:=False;
end;
Initialization
RegisterCodeGenerator(SSQLConst, SSQLConstDescr, TDDSQLConstGenerator);
Finalization
UnRegisterCodeGenerator(TDDSQLConstGenerator);
end.
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