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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 fpcgcreatedbf;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, fpddCodeGen;
Type
{ TDDCreateDBFOptions }
TDDCreateDBFOptions = Class(TCodeGeneratorOptions)
private
FIDent: String;
FProcName: String;
FCreateInstance: Boolean;
FTableName: String;
procedure SetIdent(const AValue: String);
procedure SetProcName(const AValue: String);
Public
Constructor Create; override;
Procedure Assign(ASource : TPersistent); override;
Published
Property Identifier : String Read FIDent Write SetIdent;
Property CreateInstance : Boolean Read FCreateInstance Write FCreateInstance default True;
Property ProcedureName : String Read FProcName Write SetProcName;
Property TableName : String Read FTableName Write FTableName;
end;
{ TDDCreateDBFGenerator }
TDDCreateDBFGenerator = Class(TDDCustomCodeGenerator)
Private
FFields: TFieldPropDefs;
Protected
Function ProcedureDecl : String; virtual;
Function CreateOptions : TCodeGeneratorOptions; override;
Procedure DoGenerateImplementation(Strings: TStrings); override;
Procedure DoGenerateInterface(Strings: TStrings); override;
function GetFieldDefs: TFieldPropDefs; override;
procedure SetFieldDefs(const AValue: TFieldPropDefs); override;
Function DBFOptions : TDDCreateDBFOptions;
Function GetImplementationUsesClause : string; override;
Function GetInterfaceUsesClause : string; override;
Public
Constructor Create(AOwner : TComponent); override;
Destructor Destroy; override;
Class Function NeedsFieldDefs : Boolean; override;
end;
implementation
uses db,typinfo;
{ TDDCreateDBFOptions }
procedure TDDCreateDBFOptions.SetIdent(const AValue: String);
begin
if FIDent=AValue then exit;
If Not IsValidIdent(AValue) then
Raise ECodeGenerator.CreateFmt(SErrInvalidIdentifier,[AValue]);
FIDent:=AValue;
end;
procedure TDDCreateDBFOptions.SetProcName(const AValue: String);
begin
if FProcName=AValue then exit;
If Not IsValidIdent(AValue) then
Raise ECodeGenerator.CreateFmt(SErrInvalidIdentifier,[AValue]);
FProcName:=AValue;
end;
constructor TDDCreateDBFOptions.Create;
begin
inherited Create;
FCreateInstance:=True;
FIdent:='DBF';
FTableName:='MyTable';
FProcName:='CreateDBF';
end;
procedure TDDCreateDBFOptions.Assign(ASource: TPersistent);
Var
DOP : TDDCreateDBFOptions;
begin
if ASource is TDDCreateDBFOptions then
begin
DOP:=ASource as TDDCreateDBFOptions;
FCreateInstance:=DOP.FCreateInstance;
Fident:=DOP.FIdent;
FProcName:=DOP.FProcName;
FTableName:=DOP.FTableName;
end;
inherited Assign(ASource);
end;
{ TDDCreateDBFGenerator }
function TDDCreateDBFGenerator.ProcedureDecl: String;
begin
If not DBFOptions.CreateInstance then
Result:=Format('%s (%s : TDBF)',[DBFoptions.ProcedureName,DBFOptions.Identifier])
else
Result:=DBFoptions.ProcedureName;
Result:=Format('procedure %s;',[Result]);
end;
function TDDCreateDBFGenerator.CreateOptions: TCodeGeneratorOptions;
begin
Result:=TDDCreateDBFOptions.Create;
end;
procedure TDDCreateDBFGenerator.DoGenerateImplementation(Strings: TStrings);
Var
i : integer;
F : TFieldPropDef;
S : String;
N : String;
begin
N:=DBFOptions.Identifier;
If (DBFoptions.ProcedureName<>'') then
begin
BeginMethod(Strings,ProcedureDecl);
If DBFOptions.CreateInstance then
begin
Addln(Strings);
Addln(Strings,'Var');
IncIndent;
Try
Addln(Strings,'%s : TDBF;',[N]);
Finally
DecIndent;
end;
end;
AddLn(Strings,'begin');
IncIndent;
end;
Try
If DBFOptions.CreateInstance then
Addln(Strings,'%s:=TDBF.Create(Nil);',[N]);
Addln(Strings,'With %s do',[N]);
IncIndent;
try
AddLn(Strings,'begin');
If Not DBFOptions.CreateInstance then
AddLn(Strings,'Close;');
AddLn(Strings,'With FieldDefs do');
IncIndent;
try
AddLn(Strings,'begin');
For I:=0 to Fields.Count-1 do
begin
F:=Fields[i];
If F.Enabled then
begin
S:=GetEnumName(TypeInfo(TFieldType),Ord(F.FieldType));
AddLn(Strings,'Add(''%s'',%s,%d);',[F.FieldName,S,F.PropertySize]);
end;
end;
AddLn(Strings,'end;');
Finally
DecIndent;
end;
AddLn(Strings,'TableName:=%s;',[CreateString(DBFOptions.TableName)]);
AddLn(Strings,'CreateTable;');
AddLn(Strings,'Exclusive:=true;');
AddLn(Strings,'Open;');
AddLn(Strings,'end;');
finally
DecIndent;
end;
Finally
If (DBFoptions.ProcedureName<>'') then
begin
DecIndent;
EndMethod(Strings,DBFoptions.ProcedureName);
end;
end;
end;
procedure TDDCreateDBFGenerator.DoGenerateInterface(Strings: TStrings);
begin
If (DBFoptions.ProcedureName<>'') then
BeginMethod(Strings,ProcedureDecl);
end;
function TDDCreateDBFGenerator.GetFieldDefs: TFieldPropDefs;
begin
Result:=FFields;
end;
procedure TDDCreateDBFGenerator.SetFieldDefs(const AValue: TFieldPropDefs);
begin
FFields.Assign(AValue);
end;
function TDDCreateDBFGenerator.DBFOptions: TDDCreateDBFOptions;
begin
Result:=TDDCreateDBFOptions(CodeOptions);
end;
function TDDCreateDBFGenerator.GetImplementationUsesClause: String;
begin
If DBFOptions.CreateInstance then
Result:='db, dbf';
end;
function TDDCreateDBFGenerator.GetInterfaceUsesClause: string;
begin
If Not DBFOptions.CreateInstance then
Result:='db, dbf';
end;
constructor TDDCreateDBFGenerator.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FFields:=TFieldPropDefs.Create(TFieldPropDef);
end;
destructor TDDCreateDBFGenerator.Destroy;
begin
FreeAndNil(FFields);
inherited Destroy;
end;
class function TDDCreateDBFGenerator.NeedsFieldDefs: Boolean;
begin
Result:=True;
end;
initialization
RegisterCodeGenerator('DBFCreate','Create DBF file for data',TDDCreateDBFGenerator);
Finalization
UnRegisterCodeGenerator(TDDCreateDBFGenerator);
end.
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