include/root/TSQLObjectData.h

0001 // @(#)root/sql:$Id$
0002 // Author: Sergey Linev  20/11/2005
0003
0004 /*************************************************************************
0005  * Copyright (C) 1995-2005, Rene Brun and Fons Rademakers.               *
0006  * All rights reserved.                                                  *
0007  *                                                                       *
0008  * For the licensing terms see $ROOTSYS/LICENSE.                         *
0009  * For the list of contributors see $ROOTSYS/README/CREDITS.             *
0010  *************************************************************************/
0011
0012 #ifndef ROOT_TSQLObjectData
0013 #define ROOT_TSQLObjectData
0014
0015 #include "TObject.h"
0016
0017 #include "TString.h"
0018
0019 class TObjArray;
0020 class TList;
0021 class TSQLClassInfo;
0022 class TSQLResult;
0023 class TSQLRow;
0024 class TSQLStatement;
0025
0026 class TSQLObjectInfo : public TObject {
0027
0028 public:
0029    TSQLObjectInfo();
0030    TSQLObjectInfo(Long64_t objid, const char *classname, Version_t version);
0031    ~TSQLObjectInfo() override;
0032
0033    Long64_t GetObjId() const { return fObjId; }
0034    const char *GetObjClassName() const { return fClassName.Data(); }
0035    Version_t GetObjVersion() const { return fVersion; }
0036
0037 protected:
0038    Long64_t fObjId;
0039    TString fClassName;
0040    Version_t fVersion;
0041
0042    ClassDefOverride(TSQLObjectInfo, 1) // Info (classname, version) about object in database
0043 };
0044
0045 //=======================================================================
0046
0047 class TSQLObjectData : public TObject {
0048
0049 public:
0050    TSQLObjectData();
0051
0052    TSQLObjectData(TSQLClassInfo *sqlinfo, Long64_t objid, TSQLResult *classdata, TSQLRow *classrow,
0053                   TSQLResult *blobdata, TSQLStatement *blobstmt);
0054
0055    ~TSQLObjectData() override;
0056
0057    Long64_t GetObjId() const { return fObjId; }
0058    TSQLClassInfo *GetInfo() const { return fInfo; }
0059
0060    Bool_t LocateColumn(const char *colname, Bool_t isblob = kFALSE);
0061    Bool_t IsBlobData() const { return fCurrentBlob || (fUnpack != nullptr); }
0062    void ShiftToNextValue();
0063
0064    void AddUnpack(const char *tname, const char *value);
0065    void AddUnpackInt(const char *tname, Int_t value);
0066
0067    const char *GetValue() const { return fLocatedValue; }
0068    const char *GetLocatedField() const { return fLocatedField; }
0069    const char *GetBlobPrefixName() const { return fBlobPrefixName; }
0070    const char *GetBlobTypeName() const { return fBlobTypeName; }
0071
0072    Bool_t VerifyDataType(const char *tname, Bool_t errormsg = kTRUE);
0073    Bool_t PrepareForRawData();
0074
0075 protected:
0076    Bool_t ExtractBlobValues();
0077    Bool_t ShiftBlobRow();
0078
0079    Int_t GetNumClassFields();
0080    const char *GetClassFieldName(Int_t n);
0081
0082    TSQLClassInfo *fInfo;        //!
0083    Long64_t fObjId;             //!
0084    Bool_t fOwner;               //!
0085    TSQLResult *fClassData;      //!
0086    TSQLResult *fBlobData;       //!
0087    TSQLStatement *fBlobStmt;    //!
0088    Int_t fLocatedColumn;        //!
0089    TSQLRow *fClassRow;          //!
0090    TSQLRow *fBlobRow;           //!
0091    const char *fLocatedField;   //!
0092    const char *fLocatedValue;   //!
0093    Bool_t fCurrentBlob;         //!
0094    const char *fBlobPrefixName; ///<! name prefix in current blob row
0095    const char *fBlobTypeName;   ///<! name type (without prefix) in current blob row
0096    TObjArray *fUnpack;          //!
0097
0098    ClassDefOverride(TSQLObjectData, 1) // Keeps the data requested from the SQL server for an object.
0099 };
0100
0101 // ======================================================================
0102 /**
0103 \class TSQLObjectDataPool
0104 \ingroup IO
0105 XML object keeper class
0106 */
0107
0108 class TSQLObjectDataPool : public TObject {
0109
0110 public:
0111    TSQLObjectDataPool();
0112    TSQLObjectDataPool(TSQLClassInfo *info, TSQLResult *data);
0113    ~TSQLObjectDataPool() override;
0114
0115    TSQLClassInfo *GetSqlInfo() const { return fInfo; }
0116    TSQLResult *GetClassData() const { return fClassData; }
0117    TSQLRow *GetObjectRow(Long64_t objid);
0118
0119 protected:
0120    TSQLClassInfo *fInfo;   ///<!  classinfo, for which pool is created
0121    TSQLResult *fClassData; ///<!  results with request to selected table
0122    Bool_t fIsMoreRows;     ///<!  indicates if class data has not yet read rows
0123    TList *fRowsPool;       ///<!  pool of extracted, but didnot used rows
0124
0125    ClassDefOverride(TSQLObjectDataPool, 1) // XML object keeper class
0126 };
0127
0128 #endif