ClassAdIterator Class Reference

An object for iterating over the attributes of a ClassAd--deprecated. More...

#include <classadItor.h>

Collaboration diagram for ClassAdIterator:

[legend]List of all members.

Public Member Functions
	ClassAdIterator ()
	Constructor.
	ClassAdIterator (const ClassAd &ca)
	Constructor which initializes the iterator to the given ClassAd.
	~ClassAdIterator ()
	Destructor.
void	Initialize (const ClassAd &ca)
	Initializes the object to iterate over a ClassAd; the iterator begins at the "before first" position.
void	ToFirst ()
	Positions the iterator to the "before first" position.
void	ToAfterLast ()
	Positions the iterator to the "after last" position.
bool	NextAttribute (std::string &attr, const ExprTree *&expr)
	Gets the next attribute in the ClassAd.
bool	CurrentAttribute (std::string &attr, const ExprTree *&expr) const
	Gets the attribute currently referred to by the iterator.
bool	IsAtFirst () const
	Predicate to check the position of the iterator.
bool	IsAfterLast () const
	Predicate to check the position of the iterator.

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Detailed Description

An object for iterating over the attributes of a ClassAd--deprecated.

We recommend that you now use the STL-like iterators defined with ClassAd. Several iterators may be active over the same ClassAd at any time, and the same iterator object may be used to iterate over other ClassAds as well. Note that attributes will not be provided in any specific order. Also, ClassAdIterator is a ``forward iterator'' only; i.e., there is no PreviousAttribute() method.

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Constructor & Destructor Documentation

ClassAdIterator::ClassAdIterator (  const ClassAd &  ca  )  [inline]

Constructor which initializes the iterator to the given ClassAd. Parameters: ca  The ClassAd to iterate over. See also: initialize

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Member Function Documentation

bool ClassAdIterator::CurrentAttribute (  std::string &  attr, const ExprTree *&  expr )  const

Gets the attribute currently referred to by the iterator. Parameters: attr  The name of the next attribute in the ClassAd. expr  The expression of the next attribute in the ClassAd. Returns: false if the operation failed, true otherwise.

void ClassAdIterator::Initialize (  const ClassAd &  ca  )  [inline]

Initializes the object to iterate over a ClassAd; the iterator begins at the "before first" position. This method must be called before the iterator is usable. (The iteration methods return false if the iterator has not been initialized.) This method may be called any number of times, with different ClassAds as arguments. Parameters: ca  The ClassAd to iterate over (i.e., the iteratee).

bool ClassAdIterator::IsAfterLast (   )  const [inline]

Predicate to check the position of the iterator. Returns: true iff the iterator is after the last element.

bool ClassAdIterator::IsAtFirst (   )  const [inline]

Predicate to check the position of the iterator. Returns: true iff the iterator is before the first element.

bool ClassAdIterator::NextAttribute (  std::string &  attr, const ExprTree *&  expr )

Gets the next attribute in the ClassAd. Parameters: attr  The name of the next attribute in the ClassAd. expr  The expression of the next attribute in the ClassAd. Returns: false if the iterator has crossed the last attribute in the ClassAd, or true otherwise.

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

• classadItor.h