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TTreeResult Class Reference

Class defining interface to a TTree query result with the same interface as for SQL databases.

A TTreeResult is returned by TTree::Query() (actually TTreePlayer::Query()).

Related classes are TTreeRow.

Definition at line 34 of file TTreeResult.h.

Public Member Functions

 TTreeResult ()
 Create a query result object.
 
 TTreeResult (Int_t nfields)
 Create a query result object.
 
 ~TTreeResult () override
 Cleanup result object.
 
void Close (Option_t *option="") override
 Close query result.
 
Int_t GetFieldCount () override
 Get number of fields in result.
 
const char * GetFieldName (Int_t field) override
 Get name of specified field.
 
TObjArrayGetRows () const
 
TSQLRowNext () override
 Get next query result row.
 
- Public Member Functions inherited from TSQLResult
virtual ~TSQLResult ()
 
virtual Int_t GetRowCount () const
 
TClassIsA () const override
 
void Streamer (TBuffer &) override
 Stream an object of class TObject.
 
void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
 
- Public Member Functions inherited from TObject
 TObject ()
 TObject constructor.
 
 TObject (const TObject &object)
 TObject copy ctor.
 
virtual ~TObject ()
 TObject destructor.
 
void AbstractMethod (const char *method) const
 Use this method to implement an "abstract" method that you don't want to leave purely abstract.
 
virtual void AppendPad (Option_t *option="")
 Append graphics object to current pad.
 
virtual void Browse (TBrowser *b)
 Browse object. May be overridden for another default action.
 
ULong_t CheckedHash ()
 Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.
 
virtual const char * ClassName () const
 Returns name of class to which the object belongs.
 
virtual void Clear (Option_t *="")
 
virtual TObjectClone (const char *newname="") const
 Make a clone of an object using the Streamer facility.
 
virtual Int_t Compare (const TObject *obj) const
 Compare abstract method.
 
virtual void Copy (TObject &object) const
 Copy this to obj.
 
virtual void Delete (Option_t *option="")
 Delete this object.
 
virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)
 Computes distance from point (px,py) to the object.
 
virtual void Draw (Option_t *option="")
 Default Draw method for all objects.
 
virtual void DrawClass () const
 Draw class inheritance tree of the class to which this object belongs.
 
virtual TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).
 
virtual void Dump () const
 Dump contents of object on stdout.
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message.
 
virtual void Execute (const char *method, const char *params, Int_t *error=nullptr)
 Execute method on this object with the given parameter string, e.g.
 
virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr)
 Execute method on this object with parameters stored in the TObjArray.
 
virtual void ExecuteEvent (Int_t event, Int_t px, Int_t py)
 Execute action corresponding to an event at (px,py).
 
virtual void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message.
 
virtual TObjectFindObject (const char *name) const
 Must be redefined in derived classes.
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes.
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object.
 
virtual const char * GetIconName () const
 Returns mime type name of object.
 
virtual const char * GetName () const
 Returns name of object.
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py).
 
virtual Option_tGetOption () const
 
virtual const char * GetTitle () const
 Returns title of object.
 
virtual UInt_t GetUniqueID () const
 Return the unique object id.
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out.
 
virtual ULong_t Hash () const
 Return hash value for this object.
 
Bool_t HasInconsistentHash () const
 Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.
 
virtual void Info (const char *method, const char *msgfmt,...) const
 Issue info message.
 
virtual Bool_t InheritsFrom (const char *classname) const
 Returns kTRUE if object inherits from class "classname".
 
virtual Bool_t InheritsFrom (const TClass *cl) const
 Returns kTRUE if object inherits from TClass cl.
 
virtual void Inspect () const
 Dump contents of this object in a graphics canvas.
 
void InvertBit (UInt_t f)
 
Bool_t IsDestructed () const
 IsDestructed.
 
virtual Bool_t IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory).
 
virtual Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).
 
R__ALWAYS_INLINE Bool_t IsOnHeap () const
 
virtual Bool_t IsSortable () const
 
R__ALWAYS_INLINE Bool_t IsZombie () const
 
virtual void ls (Option_t *option="") const
 The ls function lists the contents of a class on stdout.
 
void MayNotUse (const char *method) const
 Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).
 
virtual Bool_t Notify ()
 This method must be overridden to handle object notification (the base implementation is no-op).
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete.
 
void operator delete (void *ptr)
 Operator delete.
 
void operator delete (void *ptr, void *vp)
 Only called by placement new when throwing an exception.
 
void operator delete[] (void *ptr)
 Operator delete [].
 
void operator delete[] (void *ptr, void *vp)
 Only called by placement new[] when throwing an exception.
 
void * operator new (size_t sz)
 
void * operator new (size_t sz, void *vp)
 
void * operator new[] (size_t sz)
 
void * operator new[] (size_t sz, void *vp)
 
TObjectoperator= (const TObject &rhs)
 TObject assignment operator.
 
virtual void Paint (Option_t *option="")
 This method must be overridden if a class wants to paint itself.
 
virtual void Pop ()
 Pop on object drawn in a pad to the top of the display list.
 
virtual void Print (Option_t *option="") const
 This method must be overridden when a class wants to print itself.
 
virtual Int_t Read (const char *name)
 Read contents of object with specified name from the current directory.
 
virtual void RecursiveRemove (TObject *obj)
 Recursively remove this object from a list.
 
void ResetBit (UInt_t f)
 
virtual void SaveAs (const char *filename="", Option_t *option="") const
 Save this object in the file specified by filename.
 
virtual void SavePrimitive (std::ostream &out, Option_t *option="")
 Save a primitive as a C++ statement(s) on output stream "out".
 
void SetBit (UInt_t f)
 
void SetBit (UInt_t f, Bool_t set)
 Set or unset the user status bits as specified in f.
 
virtual void SetDrawOption (Option_t *option="")
 Set drawing option for object.
 
virtual void SetUniqueID (UInt_t uid)
 Set the unique object id.
 
void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
 
virtual void SysError (const char *method, const char *msgfmt,...) const
 Issue system error message.
 
R__ALWAYS_INLINE Bool_t TestBit (UInt_t f) const
 
Int_t TestBits (UInt_t f) const
 
virtual void UseCurrentStyle ()
 Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.
 
virtual void Warning (const char *method, const char *msgfmt,...) const
 Issue warning message.
 
virtual Int_t Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0)
 Write this object to the current directory.
 
virtual Int_t Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const
 Write this object to the current directory.
 

Private Member Functions

void AddField (Int_t field, const char *fieldname)
 Add field name to result set.
 
void AddRow (TSQLRow *row)
 Adopt a row to result set.
 
Bool_t IsValid (Int_t field)
 Check if result set is open and field index within range.
 

Private Attributes

Int_t fColumnCount
 number of columns in result
 
TStringfFields
 [fColumnCount] array containing field strings
 
Int_t fNextRow
 row iterator
 
TObjArrayfResult
 query result (TTreeRow objects)
 

Friends

class TTreePlayer
 

Additional Inherited Members

- Public Types inherited from TObject
enum  {
  kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 ,
  kBitMask = 0x00ffffff
}
 
enum  { kSingleKey = (1ULL << ( 0 )) , kOverwrite = (1ULL << ( 1 )) , kWriteDelete = (1ULL << ( 2 )) }
 
enum  EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) }
 
enum  EStatusBits {
  kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) ,
  kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 ))
}
 
- Static Public Member Functions inherited from TSQLResult
static TClassClass ()
 
static const char * Class_Name ()
 
static constexpr Version_t Class_Version ()
 
static const char * DeclFileName ()
 
- Static Public Member Functions inherited from TObject
static TClassClass ()
 
static const char * Class_Name ()
 
static constexpr Version_t Class_Version ()
 
static const char * DeclFileName ()
 
static Longptr_t GetDtorOnly ()
 Return destructor only flag.
 
static Bool_t GetObjectStat ()
 Get status of object stat flag.
 
static void SetDtorOnly (void *obj)
 Set destructor only flag.
 
static void SetObjectStat (Bool_t stat)
 Turn on/off tracking of objects in the TObjectTable.
 
- Protected Types inherited from TObject
enum  { kOnlyPrepStep = (1ULL << ( 3 )) }
 
- Protected Member Functions inherited from TSQLResult
 TSQLResult ()
 
- Protected Member Functions inherited from TObject
virtual void DoError (int level, const char *location, const char *fmt, va_list va) const
 Interface to ErrorHandler (protected).
 
void MakeZombie ()
 
- Protected Attributes inherited from TSQLResult
Int_t fRowCount
 

#include <TTreeResult.h>

Inheritance diagram for TTreeResult:
[legend]

Constructor & Destructor Documentation

◆ TTreeResult() [1/2]

TTreeResult::TTreeResult ( )

Create a query result object.

Definition at line 32 of file TTreeResult.cxx.

◆ TTreeResult() [2/2]

TTreeResult::TTreeResult ( Int_t  nfields)

Create a query result object.

Definition at line 44 of file TTreeResult.cxx.

◆ ~TTreeResult()

TTreeResult::~TTreeResult ( )
override

Cleanup result object.

Definition at line 56 of file TTreeResult.cxx.

Member Function Documentation

◆ AddField()

void TTreeResult::AddField ( Int_t  field,
const char *  fieldname 
)
private

Add field name to result set.

This is an internal method that is not exported via the abstract interface and that should not be user called.

Definition at line 142 of file TTreeResult.cxx.

◆ AddRow()

void TTreeResult::AddRow ( TSQLRow row)
private

Adopt a row to result set.

This is an internal method that is not exported via the abstract interface and that should not be user called.

Definition at line 154 of file TTreeResult.cxx.

◆ Close()

void TTreeResult::Close ( Option_t option = "")
overridevirtual

Close query result.

Implements TSQLResult.

Definition at line 67 of file TTreeResult.cxx.

◆ GetFieldCount()

Int_t TTreeResult::GetFieldCount ( )
overridevirtual

Get number of fields in result.

Implements TSQLResult.

Definition at line 97 of file TTreeResult.cxx.

◆ GetFieldName()

const char * TTreeResult::GetFieldName ( Int_t  field)
overridevirtual

Get name of specified field.

Implements TSQLResult.

Definition at line 109 of file TTreeResult.cxx.

◆ GetRows()

TObjArray * TTreeResult::GetRows ( ) const
inline

Definition at line 56 of file TTreeResult.h.

◆ IsValid()

Bool_t TTreeResult::IsValid ( Int_t  field)
private

Check if result set is open and field index within range.

Definition at line 81 of file TTreeResult.cxx.

◆ Next()

TSQLRow * TTreeResult::Next ( )
overridevirtual

Get next query result row.

The returned object must be deleted by the user and becomes invalid when the result set is closed or deleted.

Implements TSQLResult.

Definition at line 122 of file TTreeResult.cxx.

Friends And Related Symbol Documentation

◆ TTreePlayer

friend class TTreePlayer
friend

Definition at line 36 of file TTreeResult.h.

Member Data Documentation

◆ fColumnCount

Int_t TTreeResult::fColumnCount
private

number of columns in result

Definition at line 39 of file TTreeResult.h.

◆ fFields

TString* TTreeResult::fFields
private

[fColumnCount] array containing field strings

Definition at line 40 of file TTreeResult.h.

◆ fNextRow

Int_t TTreeResult::fNextRow
private

row iterator

Definition at line 42 of file TTreeResult.h.

◆ fResult

TObjArray* TTreeResult::fResult
private

query result (TTreeRow objects)

Definition at line 41 of file TTreeResult.h.

Libraries for TTreeResult:

The documentation for this class was generated from the following files: