Abstract object iterator with rewinding. More...

#include <JAbstractObjectIterator.hh>

Inheritance diagram for JLANG::JRewindableAbstractObjectIterator< T >:

Public Types
typedef JPointer< T >	pointer_type
	Type definition of pointer_type. More...

typedef JObjectIterator< T > ::pointer_type	pointer_type

Public Member Functions
virtual bool	hasNext ()=0
	Check availability of next element. More...

virtual const pointer_type &	next ()=0
	Get next element. More...

virtual skip_type	skip (const skip_type ns)
	Skip items. More...

virtual void	rewind ()=0
	Rewind. More...

virtual bool	setObject (T &object)=0
	Set object. More...

virtual bool	hasNext () override
	Check availability of next element. More...

virtual const pointer_type &	next () override
	Get next element. More...

Protected Attributes
T	object
	object More...

bool	has_next
	status More...

Detailed Description

template<class T>
class JLANG::JRewindableAbstractObjectIterator< T >

Abstract object iterator with rewinding.

Definition at line 92 of file JAbstractObjectIterator.hh.

Member Typedef Documentation

template<class T>

typedef JPointer<T> JLANG::JObjectIterator< T >::pointer_type

inherited

Type definition of pointer_type.

Definition at line 58 of file JObjectIterator.hh.

template<class T>

typedef JObjectIterator<T>::pointer_type JLANG::JAbstractObjectIterator< T >::pointer_type

inherited

Definition at line 39 of file JAbstractObjectIterator.hh.

Member Function Documentation

template<class T>

virtual bool JLANG::JObjectIterator< T >::hasNext ( )

pure virtualinherited

Check availability of next element.

Returns: true if the iteration has more elements; else false

template<class T>

virtual const pointer_type& JLANG::JObjectIterator< T >::next ( )

pure virtualinherited

Get next element.

Returns: pointer to element

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

Definition at line 90 of file JObjectIterator.hh.

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

template<class T>

virtual void JLANG::JRewindable< T >::rewind ( )

pure virtualinherited

Rewind.

template<class T>

virtual bool JLANG::JAbstractObjectIterator< T >::setObject ( T & object )

pure virtualinherited

Set object.

Parameters

object reference to object to be set

Returns: true if set; else false

Implemented in JDATABASE::JDatabaseObjectIterator< T >, JNET::JControlHostObjectIterator< T >, JNET::JLigierObjectIterator< T >, JSUPPORT::JDAQFileReader< T, true >, JIO::JReaderObjectIterator< T >, and JLANG::JStreamObjectIterator< T >.

template<class T>

virtual bool JLANG::JAbstractObjectIterator< T >::hasNext ( )

inlineoverridevirtualinherited

Check availability of next element.

Returns: true if the iteration has more elements; else false

Implements JLANG::JObjectIterator< T >.

Definition at line 56 of file JAbstractObjectIterator.hh.

     {
       if (!has_next) {
         has_next = this->setObject(object);
       }
 
       return has_next;
     }

template<class T>

virtual const pointer_type& JLANG::JAbstractObjectIterator< T >::next ( )

inlineoverridevirtualinherited

Get next element.

Returns: pointer to element

Implements JLANG::JObjectIterator< T >.

Definition at line 71 of file JAbstractObjectIterator.hh.

     {
       if (has_next)
         ps.reset(&this->object);
       else
         ps.reset(NULL);
 
       has_next = false;
       
       return ps;
     }