JROOT::JRootFileReader< T, false > Class Template Reference

Tempate specialisation of JRootFileReader for TTree incompatible iteration. More...

#include <JRootFileReader.hh>

Inheritance diagram for JROOT::JRootFileReader< T, false >:

Public Types
typedef JAccessibleObjectIterator< T >::pointer_type	pointer_type
typedef JMemory_t< JClass_t >	memory_type

Public Member Functions
	JRootFileReader ()
	Default constructor. More...
	JRootFileReader (const char *file_name, const char *key=getName(JType< T >()))
	Constructor. More...
virtual void	rewind () override
	Rewind. More...
virtual void	open (const char *file_name) override
	Open file. More...
virtual bool	hasNext () override
	Check availability of next element. More...
virtual const pointer_type &	next () override
	Get next element. More...
virtual skip_type	skip (const skip_type ns) override
	Skip items. More...
Short_t	getCycle () const
	Get cycle number of last read object. More...
virtual skip_type	skip (const skip_type ns)
	Skip items. More...
virtual bool	is_open () const =0
	Check is device is open. More...
virtual void	close ()=0
	Close device. More...
virtual void	close () override
	Close file. More...
TFile *	getFile () const
	Get file. More...
virtual bool	is_open () const override
	Check is file is open. More...
virtual void	reset () override
	Reset pointer. More...
virtual void	reset () override
	Reset pointer. More...
template<class T >
void	reset (const JPointer< T > &pointer)
	Reset pointer. More...
template<class T >
void	reset (const JPointer< T > &pointer)
	Reset pointer. More...
void	reset (JClass_t *p)
	Reset pointer. More...
void	recreate ()
	Recreate object in memory. More...
void	create ()
	Create object in memory. More...
void	create (const unsigned int size)
	Create array of objects in memory. More...
virtual JClass_t *	get () const override
	Get pointer. More...
virtual void	set (JClass_t *p) override
	Set pointer. More...
template<class T >
void	set (const JPointer< T > &pointer)
	Set pointer. More...
JClass_t *const &	getReference () const
	Get rereference to internal pointer. More...
JClass_t *&	getReference ()
	Get rereference to internal pointer. More...
virtual bool	equals (const JAbstractPointer &object) const
	Equals. More...
bool	is_valid () const
	Check validity of pointer. More...
JClass_t *	operator-> () const
	Smart pointer operator. More...
	operator JClass_t * () const
	Type conversion operator. More...

Static Public Member Functions
static void	Throw (const bool option)
	Enable/disable throw option. More...
static int	Throw (const JException_t &error, const int value=-1)
	Throw exception or return error. More...
static void	release (JClass_t *p)
	Release memory. More...

Protected Member Functions
void	release ()
	Release memory. More...

Protected Attributes
Short_t	cycleOld
Short_t	cycleNew
T *	__p
TString	name

Static Protected Attributes
static bool	do_throw
	throw option More...

Private Member Functions
void	do_open (const char *file_name)
	Open file. More...
void	do_close ()
	Close file. More...

Detailed Description

template<class T>
class JROOT::JRootFileReader< T, false >

Tempate specialisation of JRootFileReader for TTree incompatible iteration.

The methods JROOT::actionAtFileOpen and JROOT::actionAtFileRead are called at opening of each file and reading of each object, respectively.

This class implements the JLANG::JAccessibleObjectIterator interface.

Definition at line 66 of file JRootFileReader.hh.

Member Typedef Documentation

pointer_type

template<class T >

typedef JAccessibleObjectIterator<T>::pointer_type JROOT::JRootFileReader< T, false >::pointer_type

Definition at line 73 of file JRootFileReader.hh.

memory_type

template<class JClass_t , template< class > class JMemory_t = JNew>

typedef JMemory_t<JClass_t> JLANG::JStorage< JClass_t, JMemory_t >::memory_type

inherited

Definition at line 33 of file JStorage.hh.

Constructor & Destructor Documentation

JRootFileReader() [1/2]

template<class T >

JROOT::JRootFileReader< T, false >::JRootFileReader ( )

inline

Default constructor.

Definition at line 79 of file JRootFileReader.hh.

                      :
      cycleOld(0),
      cycleNew(1),
      __p (NULL),
      name(getName(JType<T>()))
    {}

JRootFileReader() [2/2]

template<class T >

JROOT::JRootFileReader< T, false >::JRootFileReader ( const char *  file_name, const char *  key = getName(JType<T>())  )

inline

Constructor.

Parameters

file_name	file name
key	key of object to be read

Definition at line 93 of file JRootFileReader.hh.

                                                           :
      cycleOld(0),
      cycleNew(1),
      __p (NULL),
      name(key)
    {
      open(file_name);
    }

Member Function Documentation

rewind()

template<class T >

virtual void JROOT::JRootFileReader< T, false >::rewind ( )

inlineoverridevirtual

Rewind.

Implements JLANG::JRewindable< T >.

Definition at line 107 of file JRootFileReader.hh.

    {
      cycleOld = 0;
      cycleNew = 1;
    }

open()

template<class T >

virtual void JROOT::JRootFileReader< T, false >::open ( const char *  file_name )

inlineoverridevirtual

Open file.

Parameters

file_name

file name

Reimplemented from JROOT::JRootInputFile.

Definition at line 119 of file JRootFileReader.hh.

    {
      JRootInputFile::open(file_name);
 
      actionAtFileOpen<T>(this->getFile());
      
      rewind();
    }

hasNext()

template<class T >

virtual bool JROOT::JRootFileReader< T, false >::hasNext ( )

inlineoverridevirtual

Check availability of next element.

Returns

true if the iteration has more elements; else false

Implements JLANG::JObjectIterator< T >.

Definition at line 134 of file JRootFileReader.hh.

    {
      if (is_open()) {
 
        if (cycleOld != cycleNew) {
          
          TString key(name);
          
          key += ';';
          key += cycleNew;
        
          cycleOld = cycleNew;
          __p      = NULL;
          
          getObject(getFile(), key, __p);
 
          actionAtFileRead<T>(__p);
        }
        
        return (cycleOld == cycleNew && __p != NULL);
      }
 
      return false;
    }

next()

template<class T >

virtual const pointer_type& JROOT::JRootFileReader< T, false >::next ( )

inlineoverridevirtual

Get next element.

Returns

pointer to element.

Implements JLANG::JObjectIterator< T >.

Definition at line 165 of file JRootFileReader.hh.

    {
      static pointer_type ps;
      
      if (hasNext()) {
 
        ++cycleNew;
 
        ps.reset(__p);
 
      } else {
 
        ps.reset(NULL);
      }
 
      return ps;
    }

skip() [1/2]

template<class T >

virtual skip_type JROOT::JRootFileReader< T, false >::skip ( const skip_type  ns )

inlineoverridevirtual

Skip items.

Parameters

ns	number of items to skip

Returns

number of items skipped

Definition at line 190 of file JRootFileReader.hh.

    {
      using namespace std;
 
      if (ns < (skip_type) cycleNew + (skip_type) numeric_limits<Short_t>::max())
        cycleNew += (Short_t) ns;
      else
        cycleNew  = numeric_limits<Short_t>::max();
 
      return cycleNew - cycleOld;
    }

getCycle()

template<class T >

Short_t JROOT::JRootFileReader< T, false >::getCycle ( ) const

inline

Get cycle number of last read object.

Returns

cycle number

Definition at line 208 of file JRootFileReader.hh.

    {
      return cycleOld;
    }

skip() [2/2]

template<class T >

virtual skip_type JLANG::JObjectIterator< T >::skip ( const skip_type  ns )

inlinevirtualinherited

Skip items.

Parameters

ns	number of items to skip

Returns

number of items skipped

Reimplemented in JLANG::JSTDObjectIterator< T >, JLANG::JPipe< T >, JLANG::JPipe< JTail_t >, JLANG::JPipe< JHead_t >, and JLANG::JAbstractObjectReader< T >.

Definition at line 90 of file JObjectIterator.hh.

    {
      skip_type i = 0;
 
      for ( ; i != ns && hasNext(); ++i) {
        next();
      }
 
      return i;
    }

is_open() [1/2]

virtual bool JLANG::JAccessible::is_open ( ) const

pure virtualinherited

Check is device is open.

Returns

true if open; else false

Implemented in JROOT::JTreeReaderAccessibleObjectIterator< T >, JROOT::JRootFile, JLANG::JGZFileWriter< T >, JLANG::JGZFileReader< T >, JLANG::JNullAccess, JLANG::JAbstractAccessibleObjectWriter< T >, JLANG::JAbstractAccessibleObjectReader< T >, JLANG::JAccessibleOutputStream, and JLANG::JAccessibleInputStream.

close() [1/2]

virtual void JLANG::JAccessible::close ( )

pure virtualinherited

Close device.

Implemented in JSUPPORT::JTreeRecorder< T >, JSUPPORT::JTreeRecorder< JDAQTimesliceTypes_t >, JSUPPORT::JAutoTreeWriter< JKey_t >, JSUPPORT::JAutoTreeWriter< JNET::JTag >, JROOT::JTreeReaderAccessibleObjectIterator< T >, JROOT::JRootOutputFile, JROOT::JRootInputFile, JLANG::JGZFileWriter< T >, JLANG::JGZFileReader< T >, JLANG::JNullAccess, JLANG::JAbstractAccessibleObjectWriter< T >, JLANG::JAbstractAccessibleObjectReader< T >, JLANG::JAccessibleOutputStream, and JLANG::JAccessibleInputStream.

Throw() [1/2]

static void JLANG::JThrow< JAccessible >::Throw ( const bool  option )

inlinestaticinherited

Enable/disable throw option.

Parameters

option

true enable; false disable

Definition at line 37 of file JThrow.hh.

    {
      do_throw = option;
    }

Throw() [2/2]

static int JLANG::JThrow< JAccessible >::Throw ( const JException_t &  error, const int  value = -1  )

inlinestaticinherited

Throw exception or return error.

Parameters

error	exception
value	return code

Returns

return code

Definition at line 51 of file JThrow.hh.

    {
      using namespace std;
      
      if (do_throw) {
        throw error;
      }
 
      cerr << error.what() << endl;
      
      return value;
    }

close() [2/2]

virtual void JROOT::JRootInputFile::close ( )

inlineoverridevirtualinherited

Close file.

Implements JLANG::JAccessible.

Definition at line 145 of file JRootFile.hh.

    {
      do_close();
    }

do_open()

void JROOT::JRootInputFile::do_open ( const char *  file_name )

inlineprivateinherited

Open file.

The file is not opened when no file exists with the given name.

Parameters

file_name

file name

Definition at line 158 of file JRootFile.hh.

    {
      set(TFile::Open(file_name, "READ"));
 
      if (!is_open()) {
        Throw(MAKE_EXCEPTION(JFileOpenException, "Error opening file " << file_name));
      }
      
      if (getFile()->TestBit(TFile::kRecovered)) {
 
        const char* const value = getenv(ROOT_FILE_RECOVERY_DISABLE);
 
        if (value != NULL && strcmp(value,"0") != 0) {
          Throw(MAKE_EXCEPTION(JFileRecoveryException, "Error recovery file " << file_name << " disabled"));
        }
      }
    }

do_close()

void JROOT::JRootInputFile::do_close ( )

inlineprivateinherited

Close file.

Definition at line 180 of file JRootFile.hh.

    {
      if (getFile() != NULL && getFile()->IsOpen()) {
        getFile()->Close();
      }
 
      reset();
    }

getFile()

TFile* JROOT::JRootFile::getFile ( ) const

inlineinherited

Get file.

Returns

pointer to file

Definition at line 66 of file JRootFile.hh.

    {
      return get();
    }

is_open() [2/2]

virtual bool JROOT::JRootFile::is_open ( ) const

inlineoverridevirtualinherited

Check is file is open.

Returns

true if open; else false

Implements JLANG::JAccessible.

Definition at line 77 of file JRootFile.hh.

    {
      return (getFile() != NULL && getFile()->IsOpen());
    }

reset() [1/5]

template<class JClass_t , template< class > class JMemory_t = JNew>

virtual void JLANG::JStorage< JClass_t, JMemory_t >::reset ( )

inlineoverridevirtualinherited

Reset pointer.

The allocated memory is released.

Reimplemented from JLANG::JPointer< JClass_t >.

Reimplemented in JLANG::JSharedPointer< JClass_t, JMemory_t >, JLANG::JSharedPointer< JObjectIterator< T > >, JLANG::JSharedPointer< const TFormula >, JLANG::JSharedPointer< JFIT::JMEstimator >, JLANG::JSharedPointer< JAbstractAutoPointer< JBase_t > >, JLANG::JSharedPointer< JTRIGGER::JDAQHitSelector >, JLANG::JSharedPointer< match_type >, JLANG::JSharedPointer< JLOGGER::JLogger >, JLANG::JSharedPointer< JParserElementInterface >, JLANG::JSharedPointer< JAccessibleObjectIterator< T > >, JLANG::JSharedPointer< JExceptionHandler >, JLANG::JSharedPointer< JTRIGGER::JMatch >, JLANG::JSharedPointer< JBase_t >, JLANG::JSharedPointer< JObjectOutput< T > >, JLANG::JSharedPointer< JPropertiesElementInterface >, JLANG::JSharedPointer< JRewindableObjectIterator< T > >, JLANG::JSharedPointer< JAccessibleObjectOutput< T > >, JLANG::JSharedPointer< JNET::JControlHost >, JLANG::JSharedPointer< JTOOLS::JMultiMapTransformer >, and JLANG::JSharedPointer< JRadiation >.

Definition at line 42 of file JStorage.hh.

    { 
      if (this->is_valid()) {
        this->release();
      }
 
      pointer_type::reset();
    }

reset() [2/5]

template<class JClass_t , template< class > class JMemory_t = JNew>

virtual void JLANG::JPointer< JClass_t >::reset

inlineoverridevirtualinherited

Reset pointer.

Reimplemented from JLANG::JPointer< JClass_t >.

Reimplemented in JLANG::JSharedPointer< JObjectIterator< T > >, JLANG::JSharedPointer< const TFormula >, JLANG::JSharedPointer< JFIT::JMEstimator >, JLANG::JSharedPointer< JAbstractAutoPointer< JBase_t > >, JLANG::JSharedPointer< JTRIGGER::JDAQHitSelector >, JLANG::JSharedPointer< match_type >, JLANG::JSharedPointer< JLOGGER::JLogger >, JLANG::JSharedPointer< JParserElementInterface >, JLANG::JSharedPointer< JAccessibleObjectIterator< T > >, JLANG::JSharedPointer< JExceptionHandler >, JLANG::JSharedPointer< JTRIGGER::JMatch >, JLANG::JSharedPointer< JBase_t >, JLANG::JSharedPointer< JObjectOutput< T > >, JLANG::JSharedPointer< JPropertiesElementInterface >, JLANG::JSharedPointer< JRewindableObjectIterator< T > >, JLANG::JSharedPointer< JAccessibleObjectOutput< T > >, JLANG::JSharedPointer< JNET::JControlHost >, JLANG::JSharedPointer< JTOOLS::JMultiMapTransformer >, and JLANG::JSharedPointer< JRadiation >.

Definition at line 84 of file JPointer.hh.

    { 
      this->__p = NULL;
    }

reset() [3/5]

template<class JClass_t , template< class > class JMemory_t = JNew>

template<class T >

void JLANG::JPointer< JClass_t >::reset ( class T  )

inlineinherited

Reset pointer.

Parameters

pointer

pointer to object

Definition at line 108 of file JPointer.hh.

    {
      this->reset(pointer.get());
    }

reset() [4/5]

template<class JClass_t >

template<class T >

void JLANG::JPointer< JClass_t >::reset ( const JPointer< T > &  pointer )

inlineinherited

Reset pointer.

Parameters

pointer

pointer to object

Definition at line 108 of file JPointer.hh.

    {
      this->reset(pointer.get());
    }

reset() [5/5]

template<class JClass_t >

void JLANG::JAbstractPointer< JClass_t >::reset ( JClass_t *  p )

inlineinherited

Reset pointer.

Parameters

p	pointer to object

Definition at line 94 of file JAbstractPointer.hh.

    {
      if (this->get() != p) {
 
        this->reset();
 
        if (p != NULL) {
          this->set(p);
        }
      }
    }

recreate()

template<class JClass_t , template< class > class JMemory_t = JNew>

void JLANG::JStorage< JClass_t, JMemory_t >::recreate ( )

inlineinherited

Recreate object in memory.

A new object is created if no memory is allocated yet, else the previously created object is maintained.

Definition at line 57 of file JStorage.hh.

    {
      if (!this->is_valid()) {
        this->set(memory_type::create());
      }
    }

create() [1/2]

template<class JClass_t , template< class > class JMemory_t = JNew>

void JLANG::JStorage< JClass_t, JMemory_t >::create ( )

inlineinherited

Create object in memory.

The memory allocated by a previously created object will be released.

Definition at line 69 of file JStorage.hh.

    {
      this->reset(memory_type::create());
    }

create() [2/2]

template<class JClass_t , template< class > class JMemory_t = JNew>

void JLANG::JStorage< JClass_t, JMemory_t >::create ( const unsigned int  size )

inlineinherited

Create array of objects in memory.

The memory allocated by previously created objects will be released.

Parameters

size	number of elements

Definition at line 81 of file JStorage.hh.

    {
      this->reset(memory_type::create(size));
    }

release() [1/2]

template<class JClass_t , template< class > class JMemory_t = JNew>

void JLANG::JStorage< JClass_t, JMemory_t >::release ( )

inlineprotectedinherited

Release memory.

Definition at line 91 of file JStorage.hh.

    { 
      memory_type::release(this->get());
    }

release() [2/2]

template<class JClass_t >

static void JLANG::JNew< JClass_t >::release ( JClass_t *  p )

inlinestaticinherited

Release memory.

Parameters

p	pointer to data

Definition at line 41 of file JMemory.hh.

    {
      delete p;
    }

get()

template<class JClass_t >

virtual JClass_t* JLANG::JPointer< JClass_t >::get ( ) const

inlineoverridevirtualinherited

Get pointer.

Returns

pointer to object

Implements JLANG::JAbstractPointer< JClass_t >.

Reimplemented in JLANG::JMultiPointer< JTypeList< JHead_t, JTail_t > >, JLANG::JMultiPointer< JClass_t >, JLANG::JMultiPointer< JTail_t >, JLANG::JMultiPointer< JHead_t >, and JLANG::JMultiPointer< T >.

Definition at line 64 of file JPointer.hh.

    {
      return this->__p;
    }

set() [1/2]

template<class JClass_t >

virtual void JLANG::JPointer< JClass_t >::set ( JClass_t *  p )

inlineoverridevirtualinherited

Set pointer.

Parameters

p	pointer to object

Implements JLANG::JAbstractPointer< JClass_t >.

Reimplemented in JLANG::JSharedPointer< JClass_t, JMemory_t >.

Definition at line 75 of file JPointer.hh.

    {
      this->__p = p;
    }

set() [2/2]

template<class JClass_t >

template<class T >

void JLANG::JPointer< JClass_t >::set ( const JPointer< T > &  pointer )

inlineinherited

Set pointer.

Parameters

pointer

pointer to object

Definition at line 96 of file JPointer.hh.

    {
      this->set(pointer.get());
    }

getReference() [1/2]

template<class JClass_t >

JClass_t* const& JLANG::JPointer< JClass_t >::getReference ( ) const

inlineinherited

Get rereference to internal pointer.

Returns

reference to internal pointer

Definition at line 119 of file JPointer.hh.

    {
      return __p;
    }

getReference() [2/2]

template<class JClass_t >

JClass_t* & JLANG::JPointer< JClass_t >::getReference ( )

inlineinherited

Get rereference to internal pointer.

Returns

reference to internal pointer

Definition at line 130 of file JPointer.hh.

    {
      return __p;
    }

equals()

template<class JClass_t >

virtual bool JLANG::JAbstractPointer< JClass_t >::equals ( const JAbstractPointer< JClass_t > &  object ) const

inlinevirtualinherited

Equals.

The equality is evaluated by comparison of the internal pointers.

Parameters

object

abstract pointer

Returns

true if equals; else false

Definition at line 50 of file JAbstractPointer.hh.

    {
      return this->get() == object.get();
    }

is_valid()

template<class JClass_t >

bool JLANG::JAbstractPointer< JClass_t >::is_valid ( ) const

inlineinherited

Check validity of pointer.

Returns

true if pointer not null; else false

Definition at line 83 of file JAbstractPointer.hh.

    { 
      return this->get() != NULL; 
    }

operator->()

template<class JClass_t >

JClass_t* JLANG::JAbstractPointer< JClass_t >::operator-> ( ) const

inlineinherited

Smart pointer operator.

Returns

pointer to object

Definition at line 112 of file JAbstractPointer.hh.

    { 
      if (!is_valid())
        THROW(JNullPointerException, "JAbstractPointer::operator->()");
      else
        return this->get();
    }

operator JClass_t *()

template<class JClass_t >

JLANG::JAbstractPointer< JClass_t >::operator JClass_t * ( ) const

inlineinherited

Type conversion operator.

Returns

pointer to object

Definition at line 126 of file JAbstractPointer.hh.

    {
      return this->get();
    }

Member Data Documentation

cycleOld

template<class T >

Short_t JROOT::JRootFileReader< T, false >::cycleOld

protected

Definition at line 214 of file JRootFileReader.hh.

cycleNew

template<class T >

Short_t JROOT::JRootFileReader< T, false >::cycleNew

protected

Definition at line 215 of file JRootFileReader.hh.

__p

template<class T >

T* JROOT::JRootFileReader< T, false >::__p

protected

Definition at line 216 of file JRootFileReader.hh.

name

template<class T >

TString JROOT::JRootFileReader< T, false >::name

protected

Definition at line 217 of file JRootFileReader.hh.

do_throw

bool JLANG::JThrow< JAccessible >::do_throw

staticprotectedinherited

throw option

Set default throw option to true.

Definition at line 28 of file JThrow.hh.

---

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

• JRootFileReader.hh