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7706 lines (7333 loc) · 242 KB
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Unit uRESTDWMemoryDataset;
{$I ..\..\Includes\uRESTDW.inc}
{
REST Dataware .
Criado por XyberX (Gilbero Rocha da Silva), o REST Dataware tem como objetivo o uso de REST/JSON
de maneira simples, em qualquer Compilador Pascal (Delphi, Lazarus e outros...).
O REST Dataware também tem por objetivo leVar componentes compatíveis entre o Delphi e outros Compiladores
Pascal e com compatibilidade entre sistemas operacionais.
Desenvolvido para ser usado de Maneira RAD, o REST Dataware tem como objetivo principal você usuário que precisa
de produtividade e flexibilidade para produção de Serviços REST/JSON, simplificando o processo para você programador.
Membros do Grupo :
XyberX (Gilberto Rocha) - Admin - Criador e Administrador do pacote.
Alberto Brito - Admin - Administrador do desenvolvimento
Alexandre Abbade - Admin - Administrador do desenvolvimento de DEMOS, coordenador do Grupo.
Anderson Fiori - Admin - Gerencia de Organização dos Projetos
Flávio Motta - Member Tester and DEMO Developer.
Mobius One - Devel, Tester and Admin.
Gustavo - Criptografia and Devel.
Eloy - Devel.
Roniery - Devel.
}
Interface
{$IFDEF FPC}
{$MODE OBJFPC}{$H+}
{$ENDIF}
uses
SysUtils, Classes, DB, Variants, uRESTDWProtoTypes, uRESTDWMemDBUtils,
uRESTDWMemExprParser, {$IFNDEF FPC}uRESTDWABMemDBFilterExpr,{$ENDIF}
uRESTDWAbout, uRESTDWConsts;
Const
ftBlobTypes = [ftBlob, ftMemo, ftGraphic, ftFmtMemo, ftParadoxOle, ftDBaseOle,
ftTypedBinary, ftOraBlob, ftOraClob
{$IF DEFINED(FPC) OR DEFINED(DELPHI10_0UP)}, ftWideMemo{$IFEND}];
ftSupported = [ftString, ftSmallint, ftInteger, ftWord, ftBoolean, ftFloat, ftCurrency,
ftDate, ftTime, ftDateTime, ftAutoInc, ftBCD, ftFMTBCD, ftTimestamp,
{$IFNDEF FPC}
{$IF CompilerVersion >= 20}
ftOraTimestamp, ftFixedWideChar, ftTimeStampOffset,
ftLongWord, ftShortint, ftByte, ftSingle, ftExtended,
{$IFEND}
{$ELSE}
ftFixedWideChar,
{$ENDIF FPC}
ftBytes, ftVarBytes, ftADT, ftFixedChar, ftWideString, ftLargeint, ftVariant, ftGuid] + ftBlobTypes;
fkStoredFields = [fkData];
SDefaultIndex = 'DEFAULT_ORDER';
SCustomIndex = 'CUSTOM_ORDER';
Desc = ' DESC'; //leading space is important
LenDesc : Integer = Length(Desc);
Limiter = ';';
SNoIndexFieldNameGiven = 'Cannot create index "%s": No fields available.';
SErrIndexBasedOnInvField = 'Field "%s" has an invalid field type (%s) to base index on.';
SMinIndexes = 'The minimum amount of indexes is 1';
SIndexNotFound = 'Index ''%s'' not found';
SUniDirectional = 'Operation cannot be performed on an unidirectional dataset';
SFieldRequired = 'Field ''%s'' must have a value';
Type
TCompareFunc = Function(subValue,
aValue : Pointer;
size : Integer;
options : TLocateOptions) : Int64;
TDBCompareRec = Record
CompareFunc : TCompareFunc;
Off : Int64;
NullBOff : Int64;
FieldInd : longint;
Size : integer;
Options : TLocateOptions;
Desc : Boolean;
End;
TDBCompareStruct = array of TDBCompareRec;
Type
{$IFNDEF FPC}
{$IF Defined(HAS_FMX)}
{$IF CompilerVersion < 21}
TRecordBuffer = PChar;
{$ELSE}
TRecordBuffer = PByte;
{$IFEND}
{$ELSE}
{$IF CompilerVersion < 20}
TRecordBuffer = PChar;
{$IFEND}
{$IFEND}
{$ENDIF}
TPVariant = ^Variant;
TApplyMode = (amNone, amAppend, amMerge);
TApplyEvent = Procedure(Dataset : TDataset;
Rows : Integer) Of Object;
TRecordStatus = (rsOriginal, rsUpdated, rsInserted, rsDeleted);
TApplyRecordEvent = Procedure(Dataset : TDataset;
RecStatus : TRecordStatus;
FoundApply : Boolean) Of Object;
TMemBlobData = TRESTDWBytes;
PMemBlobData = ^TRESTDWBytes;
TMemBlobArray = Array Of TMemBlobData;
PMemBlobArray = ^TMemBlobArray;
PRESTDWMTMemoryRecord = ^TRESTDWMTMemoryRecord;
TRESTDWMTMemoryRecord = Class;
TLoadMode = (lmCopy, lmAppend);
TSaveLoadState = (slsNone, slsLoading, slsSaving);
TCompareRecords = Function(Item1, Item2 : TRESTDWMTMemoryRecord) : Integer Of Object;
TIntArray = Array Of Integer;
TRESTDWMTBookmarkData = Integer;
TRESTDWMemTable = Class;
{$IFNDEF FPC}
{$IF CompilerVersion > 21}
PRESTDWMTMemBuffer = PByte;
TRESTDWMTBookmark = TBookmark;
TRESTDWMTValueBuffer = TValueBuffer;
TRESTDWMTRecordBuffer = TRecordBuffer;
{$ELSE}
{$IFDEF UNICODE}
PRESTDWMTMemBuffer = PByte;
{$ELSE}
PRESTDWMTMemBuffer = PAnsiChar;
{$ENDIF UNICODE}
TRESTDWMTBookmark = Pointer;
TRESTDWMTValueBuffer = Pointer;
TRESTDWMTRecordBuffer = Pointer;
{$IFEND}
{$ELSE}
TValueBuffer = Array of Byte;
PRESTDWMTMemBuffer = PByte;
TRESTDWMTBookmark = Pointer;
TRESTDWMTValueBuffer = Pointer;
TRESTDWMTRecordBuffer = TRecordBuffer;
{$ENDIF}
PBlobBuffer = ^TBlobBuffer;
TBlobBuffer = Packed Record
FieldNo,
OrgBufID : Integer;
Buffer : Pointer;
Size : Int64;
end;
PRESTDWBlobField = ^TRESTDWBlobField;
TRESTDWBlobField = Packed Record
ConnBlobBuffer : Array[0..11] Of Byte; // DB specific data is stored here
BlobBuffer : PBlobBuffer;
End;
PRESTDWRecLinkItem = ^TRESTDWRecLinkItem;
TRESTDWRecLinkItem = Packed Record
Prior : PRESTDWRecLinkItem;
Next : PRESTDWRecLinkItem;
End;
PRESTDWBookmark = ^TRESTDWBookmark;
TRESTDWBookmark = Packed Record
BookmarkData : PRESTDWRecLinkItem;
BookmarkInt : Integer; // Was used by TArrayBufIndex
BookmarkFlag : TBookmarkFlag;
End;
{
TStreamField = Class(TBlobField)
Private
FStream : TStream;
Function GetAsStream : TStream;
Public
Constructor Create(AOwner : TComponent); Override;
Destructor Destroy; Override;
Procedure Put;
Property Value : TStream Read GetAsStream;
End;
TdwcolorOptions = Set Of (dwcoAllowedSharp, dwcoShowWebSharp, dwcoSysColors);
TColorField = class(TIntegerField)
Private
FOptions : TdwcolorOptions;
Protected
Function GetIdentText (AValue : Integer;
Var Text : String) : Boolean; Virtual;Overload;
Procedure GetText (Var Text : String;
DisplayText : Boolean); Override;
Function SetAsIdentString(Const AValue : String) : Boolean; Virtual;
Procedure SetAsString (Const AValue : String); Override;
Public
Constructor Create (AOwner : TComponent); Override;
Published
Property MaxValue Stored False;
Property MinValue Stored False;
Property Options : TdwcolorOptions Read FOptions Write FOptions Default [dwcoAllowedSharp];
End;
}
IRESTDWMemTable = Interface
Function GetRecordCount : Integer;
Function GetMemoryRecord (Index : Integer) : TRESTDWMTMemoryRecord;
Function GetOffSets (aField : TField) : Word;Overload;
Function GetOffSets (Index : Integer) : Word;Overload;
Function GetOffSetsBlobs : Word;
Function DataTypeSuported(datatype : TFieldType) : Boolean; // new
Function DataTypeIsBlobTypes(datatype : TFieldType) : Boolean; // new
Function GetBlobRec (Field : TField;
Rec : TRESTDWMTMemoryRecord) : TMemBlobData;
Function CreateBlobStream (Field : TField;
Mode : TBlobStreamMode) : TStream;
Function GetCalcFieldLen (FieldType: TFieldType;
Size : Word) : Word;
Procedure InternalAddRecord (Buffer : {$IFDEF FPC}Pointer{$ELSE}
{$IFDEF RESTDWANDROID}TRecBuf{$ELSE}
{$IF CompilerVersion >22}Pointer{$ELSE}TRecordBuffer{$IFEND}{$ENDIF}{$ENDIF};
aAppend : Boolean);
Procedure InitRecord (Buffer : {$IFDEF NEXTGEN}TRecBuf{$ELSE}TRecordBuffer{$ENDIF});
Function AllocRecordBuffer : TRecordBuffer;
Procedure SetMemoryRecordData(Buffer : PRESTDWMTMemBuffer;
Pos : Integer);
Procedure AfterLoad;
Function GetDataset : TDataset;
Function GetBlob (RecNo, Index : Integer) : PMemBlobData;
Procedure Loaded;
{$IFDEF FPC}
Function GetDatabaseCharSet : TDatabaseCharSet;
{$ENDIF}
End;
TRESTDWStorageBase = class(TRESTDWComponent)
Private
{$IFDEF FPC}
FDatabaseCharSet: TDatabaseCharSet;
{$ENDIF}
FEncodeStrs: Boolean;
Protected
Procedure SaveDatasetToStream (Dataset : TDataset;
Var stream : TStream); Virtual;
Procedure LoadDatasetFromStream(Dataset : TDataset;
stream : TStream); Virtual;
Procedure SaveDWMemToStream (Dataset : IRESTDWMemTable;
Var stream : TStream); Virtual;
Procedure LoadDWMemFromStream (Dataset : IRESTDWMemTable;
stream : TStream); Virtual;
Public
Constructor Create (AOwner : TComponent); Override;
Procedure SaveToStream (Dataset : TDataset;
Var Stream : TStream);
Procedure LoadFromStream(Dataset : TDataset;
Stream : TStream);
Procedure SaveToFile (Dataset : TDataset;
FileName : String);
Procedure LoadFromFile (Dataset : TDataset;
FileName : String);
Public
Property EncodeStrs : Boolean Read FEncodeStrs Write FEncodeStrs;
Published
{$IFDEF FPC}
Property DatabaseCharSet : TDatabaseCharSet Read FDatabaseCharSet Write FDatabaseCharSet;
{$ENDIF}
End;
PRecordList = ^TRecordList;
TRecordList = Class(TList)
Private
Function GetRec(Index : Integer) : TRESTDWMTMemoryRecord; Overload;
Procedure PutRec(Index : Integer;
Item : TRESTDWMTMemoryRecord); Overload;
Procedure ClearAll;
Protected
Public
Destructor Destroy; Override;
Procedure Delete(Index : Integer); Overload;
Function Add (Item : TRESTDWMTMemoryRecord): Integer; Overload;
Property Items [Index : Integer] : TRESTDWMTMemoryRecord Read GetRec Write PutRec; Default;
End;
TIndexType = (itNormal,itDefault,itCustom);
TRESTDWIndex = Class(TObject)
Private
FDataset : TRESTDWMemtable;
Protected
Function GetBookmarkSize : integer; Virtual; Abstract;
Function GetCurrentBuffer : Pointer; Virtual; Abstract;
Function GetCurrentRecord : TRecordBuffer; Virtual; Abstract;
Function GetIsInitialized : boolean; Virtual; Abstract;
Function GetSpareBuffer : TRecordBuffer; Virtual; Abstract;
Function GetSpareRecord : TRecordBuffer; Virtual; Abstract;
Function GetRecNo : Longint; Virtual; Abstract;
Procedure SetRecNo(ARecNo : Longint); Virtual; Abstract;
Public
DBCompareStruct : TDBCompareStruct;
Name,
FieldsName,
CaseinsFields,
DescFields : String;
Options : TIndexOptions;
IndNr : Integer;
Constructor Create(const ADataset : TRESTDWMemtable); Virtual;
Function ScrollBackward : TGetResult; Virtual; Abstract;
Function ScrollForward : TGetResult; Virtual; Abstract;
Function GetCurrent : TGetResult; Virtual; Abstract;
Function ScrollFirst : TGetResult; Virtual; Abstract;
Procedure ScrollLast; Virtual; Abstract;
// Gets prior/next record relative to given bookmark; does not change current record
Function GetRecord(ABookmark : PRESTDWBookmark;
GetMode : TGetMode): TGetResult; Virtual;
Procedure SetToFirstRecord; Virtual; Abstract;
Procedure SetToLastRecord; Virtual; Abstract;
Procedure StoreCurrentRecord; Virtual; Abstract;
Procedure RestoreCurrentRecord; Virtual; Abstract;
Function CanScrollForward : Boolean; Virtual; Abstract;
Procedure DoScrollForward; Virtual; Abstract;
Procedure StoreCurrentRecIntoBookmark(Const ABookmark : PRESTDWBookmark); Virtual; Abstract;
Procedure StoreSpareRecIntoBookmark (Const ABookmark : PRESTDWBookmark); Virtual; Abstract;
Procedure GotoBookmark (Const ABookmark : PRESTDWBookmark); Virtual; Abstract;
Function BookmarkValid (Const ABookmark : PRESTDWBookmark) : Boolean; Virtual;
Function CompareBookmarks (Const ABookmark1,
ABookmark2 : PRESTDWBookmark) : Integer; Virtual;
Function SameBookmarks (Const ABookmark1,
ABookmark2 : PRESTDWBookmark) : Boolean; Virtual;
Procedure InitialiseIndex; Virtual; Abstract;
Procedure InitialiseSpareRecord(Const ASpareRecord : TRecordBuffer); Virtual; Abstract;
Procedure ReleaseSpareRecord; Virtual; Abstract;
Procedure BeginUpdate; Virtual; Abstract;
// Adds a record to the end of the index as the new last record (spare record)
// Normally only used in GetNextPacket
Procedure AddRecord; Virtual; Abstract;
// Inserts a record before the current record, or if the record is sorted,
// inserts it in the proper position
Procedure InsertRecordBeforeCurrentRecord(Const ARecord : TRecordBuffer); Virtual; Abstract;
Procedure RemoveRecordFromIndex (Const ABookmark : TRESTDWBookmark); Virtual; Abstract;
Procedure OrderCurrentRecord; Virtual; Abstract;
Procedure EndUpdate; Virtual; Abstract;
Property SpareRecord : TRecordBuffer Read GetSpareRecord;
Property SpareBuffer : TRecordBuffer Read GetSpareBuffer;
Property CurrentRecord : TRecordBuffer Read GetCurrentRecord;
Property CurrentBuffer : Pointer Read GetCurrentBuffer;
Property IsInitialized : boolean Read GetIsInitialized;
Property BookmarkSize : integer Read GetBookmarkSize;
Property RecNo : Longint Read GetRecNo Write SetRecNo;
End;
TUniDirectionalBufIndex = Class(TRESTDWIndex)
Private
FSPareBuffer : TRecordBuffer;
Protected
Function GetBookmarkSize : Integer; Override;
Function GetCurrentBuffer : Pointer; Override;
Function GetCurrentRecord : TRecordBuffer; Override;
Function GetIsInitialized : Boolean; Override;
Function GetSpareBuffer : TRecordBuffer; Override;
Function GetSpareRecord : TRecordBuffer; Override;
Function GetRecNo : Longint; Override;
Procedure SetRecNo(ARecNo : Longint); Override;
Public
Function ScrollBackward : TGetResult; Override;
Function ScrollForward : TGetResult; Override;
Function GetCurrent : TGetResult; Override;
Function ScrollFirst : TGetResult; Override;
Procedure ScrollLast; Override;
Procedure SetToFirstRecord; Override;
Procedure SetToLastRecord; Override;
Procedure StoreCurrentRecord; Override;
Procedure RestoreCurrentRecord; Override;
Function CanScrollForward : Boolean; Override;
Procedure DoScrollForward; Override;
Procedure StoreCurrentRecIntoBookmark(Const ABookmark : PRESTDWBookmark); Override;
Procedure StoreSpareRecIntoBookmark (Const ABookmark : PRESTDWBookmark); Override;
Procedure GotoBookmark (Const ABookmark : PRESTDWBookmark); Override;
Procedure InitialiseIndex; Override;
Procedure InitialiseSpareRecord (Const ASpareRecord : TRecordBuffer); Override;
Procedure ReleaseSpareRecord; Override;
Procedure BeginUpdate; Override;
Procedure AddRecord; Override;
Procedure InsertRecordBeforeCurrentRecord(Const ARecord : TRecordBuffer); Override;
Procedure RemoveRecordFromIndex (const ABookmark : TRESTDWBookmark); Override;
Procedure OrderCurrentRecord; Override;
Procedure EndUpdate; Override;
End;
TDoubleLinkedBufIndex = class(TRESTDWIndex)
Private
FCursOnFirstRec : Boolean;
FStoredRecBuf : PRESTDWRecLinkItem;
FCurrentRecBuf : PRESTDWRecLinkItem;
Protected
Function GetBookmarkSize : Integer; Override;
Function GetCurrentBuffer : Pointer; Override;
Function GetCurrentRecord : TRecordBuffer; Override;
Function GetIsInitialized : Boolean; Override;
Function GetSpareBuffer : TRecordBuffer; Override;
Function GetSpareRecord : TRecordBuffer; Override;
Function GetRecNo : Longint; Override;
Procedure SetRecNo(ARecNo : Longint); Override;
Public
FLastRecBuf : PRESTDWRecLinkItem;
FFirstRecBuf : PRESTDWRecLinkItem;
FNeedScroll : Boolean;
Function ScrollBackward : TGetResult; Override;
Function ScrollForward : TGetResult; Override;
Function GetCurrent : TGetResult; Override;
Function ScrollFirst : TGetResult; Override;
Procedure ScrollLast; Override;
Function GetRecord(ABookmark : PRESTDWBookmark;
GetMode : TGetMode): TGetResult; Override;
Procedure SetToFirstRecord; Override;
Procedure SetToLastRecord; Override;
Procedure StoreCurrentRecord; Override;
procedure RestoreCurrentRecord; Override;
Function CanScrollForward : Boolean; Override;
Procedure DoScrollForward; Override;
Procedure StoreCurrentRecIntoBookmark(Const ABookmark : PRESTDWBookmark); Override;
Procedure StoreSpareRecIntoBookmark (Const ABookmark : PRESTDWBookmark); Override;
Procedure GotoBookmark (Const ABookmark : PRESTDWBookmark); Override;
Function CompareBookmarks (Const ABookmark1,
ABookmark2 : PRESTDWBookmark) : Integer; Override;
Function SameBookmarks (Const ABookmark1,
ABookmark2 : PRESTDWBookmark) : Boolean; Override;
Procedure InitialiseIndex; Override;
Procedure InitialiseSpareRecord (Const ASpareRecord : TRecordBuffer); Override;
Procedure ReleaseSpareRecord; Override;
Procedure BeginUpdate; Override;
Procedure AddRecord; Override;
Procedure InsertRecordBeforeCurrentRecord(Const ARecord : TRecordBuffer); Override;
Procedure RemoveRecordFromIndex (Const ABookmark : TRESTDWBookmark); Override;
Procedure OrderCurrentRecord; Override;
Procedure EndUpdate; Override;
End;
TRESTDWDatasetIndex = Class(TIndexDef)
Private
FBufferIndex : TRESTDWIndex;
FDiscardOnClose : Boolean;
FIndexType : TIndexType;
Public
Destructor Destroy; Override;
// Free FBufferIndex;
Procedure Clearindex;
// Set TIndexDef properties on FBufferIndex;
Procedure SetIndexProperties;
// Return true if the buffer must be built.
// Default buffer must not be built, custom only when it is not the current.
Function MustBuild (aCurrent : TRESTDWDatasetIndex) : Boolean;
// Return true if the buffer must be updated
// This are all indexes except custom, unless it is the active index
Function IsActiveIndex(aCurrent : TRESTDWDatasetIndex) : Boolean;
// The actual buffer.
Property BufferIndex : TRESTDWIndex Read FBufferIndex Write FBufferIndex;
// If the Index is created after Open, then it will be discarded on close.
Property DiscardOnClose : Boolean Read FDiscardOnClose;
// Skip build of this index
Property IndexType : TIndexType Read FIndexType Write FIndexType;
End;
TRESTDWDatasetIndexDefs = Class(TIndexDefs)
Private
Function GetBufDatasetIndex(AIndex : Integer) : TRESTDWDatasetIndex;
Function GetBufferIndex(AIndex : Integer) : TRESTDWIndex;
Public
Constructor Create(aDataset : TDataset); {$IFNDEF FPC}
{$IF CompilerVersion > 21}
Override;
{$IFEND}
{$ELSE}
Override;
{$ENDIF}
// Does not raise an exception if not found.
Function FindIndex(const IndexName: string) : TRESTDWDatasetIndex;
Property Indexdefs [AIndex : Integer] : TRESTDWDatasetIndex Read GetBufDatasetIndex;
Property Indexes [AIndex : Integer] : TRESTDWIndex Read GetBufferIndex;
End;
{ TRESTDWMemTable }
TRESTDWMemTable = Class(TDataset, IRESTDWMemTable)
Private
FSaveLoadState : TSaveLoadState;
aFilterRecs,
FMaxIndexesCount,
FPacketRecords,
FRecordFilterPos,
FRecordPos,
FRecordSize,
FBookmarkOfs,
FBlobOfs,
FRecBufSize,
FLastID,
FRowsOriginal,
FRowsChanged,
FRowsAffected : Integer;
FOffsets : TIntArray;
FAutoInc : Longint;
FDeletedValues,
FIndexList : TList;
FSrcAutoIncField : TField;
FRecords : TRecordList;
FDataSet : TDataset;
FFetch,
FAllPacketsFetched,
FRefreshing,
FClearing,
FTrimEmptyString,
FExactApply,
FAutoIncAsInteger,
FOneValueInArray,
FActive,
FCaseInsensitiveSort,
FDescendingSort,
FDataSetClosed,
FLoadStructure,
FLoadRecords : Boolean;
FDsgnFieldName,
FIndexFieldNames,
FIndexName,
FStatusName,
FKeyFieldNames : String;
FApplyMode : TApplyMode;
FBeforeApply,
FAfterApply : TApplyEvent;
FBeforeApplyRecord,
FAfterApplyRecord : TApplyRecordEvent;
FFieldName : Array Of String;
FNullmaskSize : Byte;
FFilterParser : TExprParser;
FStorageDataType : TRESTDWStorageBase;
FBlobs : TMemBlobArray;
FIndexes : TRESTDWDataSetIndexDefs;
FDefaultIndex,
FCurrentIndexDef : TRESTDWDatasetIndex;
FFieldDefClass : TFieldClass;
{$IFDEF FPC}
vDatabaseCharSet : TDatabaseCharSet;
Procedure SetDatabaseCharSet(Value : TDatabaseCharSet);
Function GetDatabaseCharSet : TDatabaseCharSet;
{$ELSE}
FFilterExpression : TRDWABExprParser;
{$ENDIF}
Procedure CalcOffSets;
Function AddRecord : TRESTDWMTMemoryRecord;
Function InsertRecord(Index : Integer) : TRESTDWMTMemoryRecord;
Function FindRecordID(ID : Integer) : TRESTDWMTMemoryRecord;
Procedure CreateIndexList(Const FieldNames : DWWideString);
Procedure FreeIndexList;
Procedure QuickSort (L, R : Integer;
Compare : TCompareRecords);
Procedure Sort;
Function CalcRecordSize : Integer;
Function GetMemoryRecord(Index : Integer) : TRESTDWMTMemoryRecord;
Function GetCapacity : Integer;
Function RecordFilter : Boolean;
Procedure SetCapacity(Value : Integer);
Procedure ClearRecords;
Procedure InitBufferPointers(GetProps : Boolean);
Procedure CheckStructure (UseAutoIncAsInteger : Boolean = False);
Procedure AddStatusField;
Procedure HideStatusField;
Function CopyFromDataSet: Integer;
Procedure ClearChanges;
Procedure DoBeforeApply (ADataset : TDataset;
RowsPending : Integer);
Procedure DoAfterApply (ADataset : TDataset;
RowsApplied : Integer);
Procedure DoBeforeApplyRecord(ADataset : TDataset;
RS : TRecordStatus;
aFound : Boolean);
Procedure DoAfterApplyRecord (ADataset : TDataset;
RS : TRecordStatus;
aApply : Boolean);
Procedure InternalGotoBookmarkData(BookmarkData : TRESTDWMTBookmarkData);
Function InternalGetFieldData (Field : TField;
Var Buffer : TRESTDWMTValueBuffer) : Boolean;
Procedure InternalSetFieldData (Field : TField;
Buffer : Pointer;
Const ValidateBuffer : TRESTDWMTValueBuffer);
Protected
Function IsLookup (Index : Integer): Boolean;
Function GetFieldDef (Index : Integer): Integer;
Function GetFieldIndex (Const aName : String) : Integer;
Function FindFieldIndex (Field : TField) : Integer;
Function FindFieldData (Buffer : Pointer;
Field : TField) : Pointer;
Function CompareFields (Data1,
Data2 : Pointer;
FieldType : TFieldType;
CaseInsensitive : Boolean): Integer; Virtual;
Function GetFieldClass (FieldType : TFieldType) : TFieldClass; Override;
Procedure DesignNotify (Const AFieldName : String;
Dummy : Integer);
// Delphi 2006+ has support for DWWideString
{$IF DEFINED(FPC) OR DEFINED(RESTDWVCL)}
Procedure DataConvert (Field : TField;
Source,
Dest : Pointer;
ToNative : Boolean); Override;
{$IFEND}
// Procedure DefChanged (Sender : TObject); Override;
Procedure AssignMemoryRecord (Rec : TRESTDWMTMemoryRecord;
Buffer : PRESTDWMTMemBuffer);
Function GetActiveRecBuf (Var RecBuf : PRESTDWMTMemBuffer) : Boolean; Virtual;
Procedure InitFieldDefsFromFields;
Procedure InitFieldDefsFromFieldsInternal;
Procedure RecordToBuffer (Rec : TRESTDWMTMemoryRecord;
Buffer : PRESTDWMTMemBuffer);
Procedure SetMemoryRecordData(Buffer : PRESTDWMTMemBuffer;
Pos : Integer); Virtual;
Procedure SetAutoIncFields (Buffer : PRESTDWMTMemBuffer); Virtual;
Function CompareRecords (Item1,
Item2 : TRESTDWMTMemoryRecord): Integer; Virtual;
Function GetBlobData (Field : TField;
Buffer : PRESTDWMTMemBuffer) : TMemBlobData;
Procedure SetBlobData (Field : TField;
Buffer : PRESTDWMTMemBuffer;
Value : TMemBlobData);
{$IFDEF NEXTGEN}
Function AllocRecBuf : TRecBuf; override;
Procedure FreeRecBuf (Var Buffer : TRecBuf); Override;
{$ENDIF NEXTGEN}
Function AllocRecordBuffer : TRecordBuffer;{$IFNDEF NEXTGEN}Override;{$ENDIF}
Procedure FreeRecordBuffer (Var Buffer : TRecordBuffer);{$IFNDEF NEXTGEN}Override;{$ENDIF}
Procedure InternalInitRecord (Buffer :{$IFDEF NEXTGEN}TRecBuf{$ELSE}TRecordBuffer{$ENDIF}); Override;
Function GetRecord (Buffer :{$IFDEF NEXTGEN}TRecBuf{$ELSE}TRecordBuffer{$ENDIF};
GetMode : TGetMode;
DoCheck : Boolean) : TGetResult; Overload; Override;
Procedure GetBookmarkData (Buffer :{$IFDEF NEXTGEN}TRecBuf{$ELSE}TRecordBuffer{$ENDIF};
Data : TRESTDWMTBookmark); Overload;Override;
Function GetBookmarkFlag (Buffer :{$IFDEF NEXTGEN}TRecBuf{$ELSE}TRecordBuffer{$ENDIF}) : TBookmarkFlag;Overload;Override;
Procedure InternalSetToRecord(Buffer :{$IFDEF NEXTGEN}TRecBuf{$ELSE}TRecordBuffer{$ENDIF}); Overload;Override;
Procedure SetBookmarkFlag (Buffer :{$IFDEF NEXTGEN}TRecBuf{$ELSE}TRecordBuffer{$ENDIF};
Value : TBookmarkFlag);Overload; Override;
Procedure SetBookmarkData (Buffer :{$IFDEF NEXTGEN}TRecBuf{$ELSE}TRecordBuffer{$ENDIF};
Data : TRESTDWMTBookmark); Overload;Override;
Procedure InitRecord (Buffer :{$IFDEF NEXTGEN}TRecBuf{$ELSE}TRecordBuffer{$ENDIF}); Overload;Override;
Procedure InternalAddRecord (Buffer : {$IFDEF FPC}Pointer{$ELSE}
{$IFDEF RESTDWANDROID}TRecBuf{$ELSE}
{$IF CompilerVersion >22}Pointer{$ELSE}TRecordBuffer{$IFEND}{$ENDIF}{$ENDIF};
aAppend : Boolean); Overload;
Function GetCurrentRecord (Buffer :{$IFDEF NEXTGEN}TRecBuf{$ELSE}TRecordBuffer{$ENDIF}): Boolean; Overload;Override;
Procedure ClearCalcFields (Buffer :{$IFDEF NEXTGEN}NativeInt{$ELSE}TRecordBuffer{$ENDIF}); Override;
Function GetRecordSize : Word; Override;
Procedure SetFiltered (Value : Boolean); Overload; Override;
Procedure SetOnFilterRecord(Const Value : TFilterRecordEvent); Override;
Procedure SetFieldData (Field : TField;
Buffer : TRESTDWMTValueBuffer);Overload;Override;
{$IFNDEF NEXTGEN}
{$IFDEF RTL240_UP}
Procedure SetFieldData (Field : TField;
Buffer : Pointer);Overload;Override;
Procedure GetBookmarkData (Buffer : TRecordBuffer;
Data : Pointer);Overload;Override;
Procedure InternalGotoBookmark(Bookmark : Pointer);Overload;Override;
Procedure SetBookmarkData (Buffer : TRecordBuffer;
Data : Pointer);Overload;Override;
{$ENDIF RTL240_UP}
{$ENDIF ~NEXTGEN}
Procedure CloseBlob (Field : TField);Override;
Procedure InternalGotoBookmark(aBookmark : TRESTDWMTBookmark);Overload;Override;
Function GetIsIndexField (Field : TField): Boolean;Override;
Procedure CreateFields; Override;
Procedure InternalFirst; Override;
Procedure InternalLast; Override;
Procedure InternalDelete; Override;
Procedure InternalPost; Override;
Procedure InternalClose; Override;
procedure CheckRequiredFields;
Procedure InternalHandleException; Override;
Procedure InternalInitFieldDefs; Override;
Procedure InternalOpen; Override;
Procedure OpenCursor(InfoQuery : Boolean);Overload;Override;
Function IsCursorOpen : Boolean; Override;
Function GetRecordCount : Integer; Override;
Function GetRecNo : Integer; Override;
Procedure SetRecNo (Value : Integer);Override;
Procedure DoAfterOpen; Override;
Procedure SetFilterText(Const Value : String);{$IFNDEF FPC}Override;{$ENDIF}
Function ParserGetVariableValue(Sender : TObject;
Const VarName : String;
Var Value : Variant) : Boolean;Virtual;
Procedure Notification (AComponent : TComponent;
Operation : TOperation);Override;
Function DataTypeSuported (datatype : TFieldType) : Boolean;
Function DataTypeIsBlobTypes (datatype : TFieldType) : Boolean;
Function GetOffSets (aField : TField) : Word;Overload;
Function GetOffSets (Index : Integer) : Word;Overload;
Function GetOffSetsBlobs : Word;
Function GetBlobRec (Field : TField;
Rec : TRESTDWMTMemoryRecord) : TMemBlobData;
Function GetCalcFieldLen (FieldType : TFieldType;
Size : Word) : Word;
procedure ClearIndexes;
Function GetDataset : TDataset;
Procedure SetIndexName(AValue : String);
Property Records [Index : Integer] : TRESTDWMTMemoryRecord Read GetMemoryRecord;
Public
Constructor Create(AOwner : TComponent);Override;
Destructor Destroy;Override;
Function BookmarkValid (aBookmark : TBookmark) : Boolean;Override;
Function CompareBookmarks(aBookmark1,
aBookmark2 : TBookmark) : Integer;Override;
Function CreateBlobStream(Field : TField;
Mode : TBlobStreamMode) : TStream;Override;
Procedure FixReadOnlyFields (MakeReadOnly : Boolean);
Procedure ClearBuffer;
Function GetBlob (aRecNo,
Index : Integer) : PMemBlobData;
Function GetFieldData (Field : TField;
{$IFNDEF FPC}
{$IF CompilerVersion > 21}Var{$IFEND}
Buffer : TRESTDWMTValueBuffer
{$ELSE}
Buffer : Pointer
{$ENDIF}) : Boolean;Overload;Override;
{$IFNDEF NEXTGEN}
{$IFDEF RTL240_UP}
Function GetFieldData (Field : TField;
Buffer : Pointer) : Boolean;Overload;Override;
{$ENDIF RTL240_UP}
{$ENDIF ~NEXTGEN}
{$IFDEF FPC}
Procedure SetFieldValues(const FieldName: string; Value: Variant); Override;
{$ENDIF}
Function IsSequenced : Boolean; Override;
Function Locate(Const KeyFields : String;
Const KeyValues : Variant;
Options : TLocateOptions) : Boolean;{$IFNDEF FPC}Override;{$ENDIF}
Function Lookup(Const KeyFields : String;
Const KeyValues : Variant;
Const ResultFields : String) : Variant;{$IFNDEF FPC}Override;{$ENDIF}
Procedure SortOnFields(Const FieldNames : String = '';
CaseInsensitive : Boolean = True;
Descending : Boolean = False);
Procedure SwapRecords (Idx1 : Integer;
Idx2 : Integer);
Procedure EmptyTable;
Procedure CopyStructure (Source : TDataset;
UseAutoIncAsInteger : Boolean = False);
Function LoadFromDataSet(Source : TDataset;
aRecordCount : Integer;
Mode : TLoadMode;
DisableAllControls : Boolean = True) : Integer;
Function SaveToDataSet (Dest : TDataset;
aRecordCount : Integer;
DisableAllControls : Boolean = True) : Integer;
Function GetValues (FldNames : String = '') : Variant;
Function FindDeleted (KeyValues : Variant) : Integer;
Procedure AfterLoad;
Function IsDeleted (out Index : Integer) : Boolean;
Function IsInserted : Boolean;
Function IsUpdated : Boolean;
Function IsOriginal : Boolean;
Procedure CancelChanges;
Function ApplyChanges : Boolean;
Function IsLoading : Boolean;
Function IsSaving : Boolean;
Procedure SaveToStream (Var stream : TStream);
Procedure LoadFromStream(stream : TStream);
Procedure Assign (Source : TPersistent);Reintroduce;Overload;Override;
Function GetCurrentIndexBuf : TRESTDWIndex;
Procedure SetIndexDefs(Value : TIndexDefs);
Function GetIndexDefs : TIndexDefs;
Function GetIndexName : String;
Function GetIndexFieldNames : String;
Function getnextpacket : Integer;
Function DefaultBufferIndex : TRESTDWIndex;
Function DefaultIndex : TRESTDWDatasetIndex;
Procedure BuildIndexes;
Function GetNewBlobBuffer : PBlobBuffer;
Function LoadField (FieldDef : TFieldDef;
buffer : Pointer;
out CreateBlob : boolean) : Boolean;
Function Fetch : Boolean;Virtual;
Procedure LoadBlobIntoBuffer(FieldDef : TFieldDef;
ABlobBuf : PRESTDWBlobField); Virtual; Abstract;
Function LoadBuffer (Buffer : TRecordBuffer) : TGetResult;
Procedure BuildIndex (AIndex : TRESTDWIndex);
Procedure FetchAll;
Function IntAllocRecordBuffer : TRecordBuffer;
Procedure SetIndexFieldNames (Const AValue : String);
Procedure InternalCreateIndex(F : TRESTDWDataSetIndex);
Function InternalAddIndex (Const AName,
AFields : String;
AOptions : TIndexOptions;
Const ADescFields : String;
Const ACaseInsFields : String) : TRESTDWDatasetIndex;
Function BufferOffset : Integer;
Procedure ProcessFieldsToCompareStruct(Const AFields,
ADescFields,
ACInsFields : TList;
Const AIndexOptions : TIndexOptions;
Const ALocateOptions : TLocateOptions;
out ACompareStruct : TDBCompareStruct);
Procedure InitDefaultIndexes;
Procedure BuildCustomIndex;
Procedure SetMaxIndexesCount (Const AValue : Integer);
Function GetBufIndex (Aindex : Integer) : TRESTDWIndex;
Function GetBufIndexDef (Aindex : Integer) : TRESTDWDatasetIndex;
Property SaveLoadState : TSaveLoadState Read FSaveLoadState;
Property RowsOriginal : Integer Read FRowsOriginal;
Property RowsChanged : Integer Read FRowsChanged;
Property RowsAffected : Integer Read FRowsAffected;
Property Refreshing : Boolean Read FRefreshing;
Property StorageDataType : TRESTDWStorageBase Read FStorageDataType Write FStorageDataType;
Property RESTDWIndexes [Aindex : Integer] : TRESTDWIndex Read GetBufIndex;
Property RESTDWIndexDefs[Aindex : Integer] : TRESTDWDatasetIndex Read GetBufIndexDef;
published
Property Capacity : Integer Read GetCapacity Write SetCapacity Default 0;
Property Active;
Property AutoCalcFields;
Property Filtered;
Property FilterOptions;
Property FieldDefs;
{$IFNDEF FPC}
Property ObjectView default False;
{$ENDIF}
{$IFDEF FPC}
Property DatabaseCharSet : TDatabaseCharSet Read GetDatabaseCharSet Write SetDatabaseCharSet;
{$ENDIF}
Property DatasetClosed : Boolean Read FDataSetClosed Write FDataSetClosed Default False;
Property KeyFieldNames : String Read FKeyFieldNames Write FKeyFieldNames;
Property LoadStructure : Boolean Read FLoadStructure Write FLoadStructure Default False;
Property LoadRecords : Boolean Read FLoadRecords Write FLoadRecords Default False;
Property ApplyMode : TApplyMode Read FApplyMode Write FApplyMode Default amNone;
Property ExactApply : Boolean Read FExactApply Write FExactApply Default False;
Property AutoIncAsInteger : Boolean Read FAutoIncAsInteger Write FAutoIncAsInteger Default False;
Property OneValueInArray : Boolean Read FOneValueInArray Write FOneValueInArray Default True;
Property TrimEmptyString : Boolean Read FTrimEmptyString Write FTrimEmptyString Default True;
Property BeforeApply : TApplyEvent Read FBeforeApply Write FBeforeApply;
Property AfterApply : TApplyEvent Read FAfterApply Write FAfterApply;
Property BeforeApplyRecord : TApplyRecordEvent Read FBeforeApplyRecord Write FBeforeApplyRecord;
Property AfterApplyRecord : TApplyRecordEvent Read FAfterApplyRecord Write FAfterApplyRecord;
Property IndexDefs : TIndexDefs Read GetIndexDefs Write SetIndexDefs;
Property IndexName : String Read GetIndexName Write SetIndexName;
Property IndexFieldNames : String Read GetIndexFieldNames Write SetIndexFieldNames;
Property MaxIndexesCount : Integer Read FMaxIndexesCount Write SetMaxIndexesCount default 2;
Property Filter;
Property BeforeOpen;
Property AfterOpen;
Property BeforeClose;
Property AfterClose;
Property BeforeInsert;
Property AfterInsert;
Property BeforeEdit;
Property AfterEdit;
Property BeforePost;
Property AfterPost;
Property BeforeCancel;
Property AfterCancel;
Property BeforeDelete;
Property AfterDelete;
Property BeforeScroll;
Property AfterScroll;
Property OnCalcFields;
Property OnDeleteError;
Property OnEditError;
Property OnFilterRecord;
Property OnNewRecord;
Property OnPostError;
End;
TRESTDWMTMemBlobStream = Class(TStream)
Private
FField : TBlobField;
FDataSet : TRESTDWMemTable;
FBuffer : PRESTDWMTMemBuffer;
FActualBlob : Pointer;
FMode : TBlobStreamMode;
FCached,
FOpened,
FModified : Boolean;
FPosition : Longint;
Function GetBlobSize : Longint;
Function GetBlobFromRecord(Field : TField) : TMemBlobData;
Procedure SetBlobFromRecord(Field : TField;
Value : TMemBlobData);
Public
Constructor Create(Field : TBlobField;
Mode : TBlobStreamMode);
Destructor Destroy; override;
Function Read (Var Buffer;
Count : Longint) : Longint;Overload;Override;
Function Write (Const Buffer;
Count : Longint) : Longint;Override;
Function Seek (Offset: Longint;
Origin: Word) : Longint;Override;
Procedure Truncate;
End;
TRESTDWMTMemoryRecord = Class(TPersistent)
Private
FMemoryData : TRESTDWMemTable;
FIndex,
FID : Integer;
FData : Pointer;
FBlobs : TMemBlobArray;
FIsNull : Boolean;
Function GetIndex : Integer;
Procedure SetMemoryData(Value : TRESTDWMemTable;
UpdateParent : Boolean);
Protected
Procedure SetIndex (Value : Integer); Virtual;
Public
Constructor Create (MemoryData : TRESTDWMemTable); Virtual;
Constructor CreateEx (MemoryData : TRESTDWMemTable;
UpdateParent : Boolean); Virtual;
Destructor Destroy;Override;
Property MemoryData : TRESTDWMemTable Read FMemoryData;
Property ID : Integer Read FID Write FID;
Property Index : Integer Read GetIndex Write SetIndex;
Property Data : Pointer Read FData Write FData;
Property Blobs : TMemBlobArray Read FBlobs Write FBlobs;
Property IsNull : Boolean Read FIsNull Write FIsNull;
End;
TSortOrder = (soAsc, soDesc);
//Possible sorting case sensitivity values
// sensitive sorting - insensitive sorting
TSortCaseSens = (scYes, scNo);
TRESTDWMemTableEx = Class(TRESTDWMemTable)
Private
fSortFields : String;
fSortOrder : TSortOrder;
fSortCaseSens : TSortCaseSens;
fAutoSortOnOpen,
fAutoRefreshOnFilterChanged : Boolean;
fFilteredRecordCount : Integer;
Function GetFilteredRecordCount : Integer;
Protected
Procedure SetFiltered (Value : Boolean); Override;
Procedure SetOnFilterRecord (Const Value : TFilterRecordEvent); Override;
Procedure InternalRefresh; Overload;Override;
{$IF Defined(MSWINDOWS) or Defined(WIN32) or Defined(WIN64) or Defined(WINDOWS)}
Procedure InternalAddRecord (Buffer : Pointer;
{$IFDEF FPC}aAppend : Boolean{$ELSE}Append : Boolean{$ENDIF});Overload;
{$IFEND}
Procedure InternalDelete; Overload;Override;
Procedure InternalPost; Overload;Override;
Procedure RefreshFilteredRecordCount;
Public
Constructor Create (AOwner : TComponent);Override;
Procedure ReSortOnFields (pSortOrder : TSortOrder;
{$IFDEF FPC}afields : String{$ELSE}fields: String{$ENDIF});
Function LoadFromDataSet (Source : TDataSet;
{$IFDEF FPC}aRecordCount : Integer;{$ELSE}RecordCount : Integer;{$ENDIF}
Mode : TLoadMode) : Integer;
Procedure EmptyTable;
Procedure CopyStructure (Source : TDataSet);
Function IsSortField (field : TField) : Boolean;
Published
Property SortOrder : TSortOrder Read fSortOrder Write fSortOrder;
Property SortCaseSens : TSortCaseSens Read fSortCaseSens Write fSortCaseSens;
Property SortFields : String Read fSortFields Write fSortFields nodefault;
Property AutoSortOnOpen : Boolean Read fAutoSortOnOpen Write fAutoSortOnOpen;
Property AutoRefreshOnFilterChanged : Boolean Read fAutoRefreshOnFilterChanged Write fAutoRefreshOnFilterChanged;
Property RecordCount : Integer Read GetFilteredRecordCount;
End;
Type
{$IFNDEF FPC}
{$IF CompilerVersion > 24}
TExtendedField = Class(TNumericField)
Protected
Function GetAsExtended : Extended;
Function GetAsString : String; Override;
Function GetAsVariant : Variant; Override;
Procedure SetAsExtended(Const AValue : Extended);
Procedure SetAsString (Const AValue : String); Override;
Procedure SetVarValue (Const AValue : Variant); Override;
Private
vSize,
vPrecision : Integer;
Public
Constructor Create(AOwner: TComponent); override;
{$IFNDEF SUPPORTS_CLASS_HELPERS}
Property AsExtended : Extended Read GetAsExtended Write SetAsExtended;
{$ENDIF}
Property Value : Extended Read GetAsExtended Write SetAsExtended;
Property Size : Integer Read vSize Write vSize;
Published
Property Precision : Integer Read vPrecision Write vPrecision;
End;
{$ELSE}
TExtendedField = Class(TNumericField)
Protected
{$IFDEF COMPILER17_UP}
Function GetAsExtended : Extended; Override;
{$ENDIF}
Function GetAsVariant : Variant; Override;
End;
{$IFEND}
{$ELSE}
TExtendedField = Class(TNumericField)
Private
vSize,
vPrecision : Integer;
Procedure SetAsExtended(Const AValue : Extended);
Protected
Function GetAsString : String; Override;
Procedure SetAsString (Const AValue : String); Override;
// Function GetAsVariant : Variant; Override;
Public
Constructor Create(AOwner: TComponent); override;
Property Size : Integer Read vSize Write vSize;
Published
Property Precision : Integer Read vPrecision Write vPrecision;
End;
{$ENDIF}
{$IFNDEF FPC}
TSQLTimeStampOffsetField = Class(TSQLTimeStampField)
Protected
{$IF CompilerVersion < 25}
Procedure GetText (Var Text : String;
DisplayText : Boolean); Override;
{$IFEND}
{$IFDEF FPC}
Procedure SetAsString(const Value: string); override;
{$ELSE}
{$IF CompilerVersion < 25}