leveldb::Iterator Class Reference

#include <iterator.h>

Inheritance diagram for leveldb::Iterator:

Collaboration diagram for leveldb::Iterator:

Classes
struct	Cleanup

Public Types
typedef void(*	CleanupFunction) (void *arg1, void *arg2)

Public Member Functions
	Iterator ()
virtual	~Iterator ()
virtual bool	Valid () const =0
virtual void	SeekToFirst ()=0
virtual void	SeekToLast ()=0
virtual void	Seek (const Slice &target)=0
virtual void	Next ()=0
virtual void	Prev ()=0
virtual Slice	key () const =0
virtual Slice	value () const =0
virtual Status	status () const =0
void	RegisterCleanup (CleanupFunction function, void *arg1, void *arg2)

Private Member Functions
	Iterator (const Iterator &)
void	operator= (const Iterator &)

Private Attributes
Cleanup	cleanup_

Detailed Description

Definition at line 23 of file iterator.h.

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Class Documentation

leveldb::Iterator::Cleanup

struct leveldb::Iterator::Cleanup

Definition at line 79 of file iterator.h.

Collaboration diagram for leveldb::Iterator::Cleanup:

Class Members
void *	arg1
void *	arg2
CleanupFunction	function
Cleanup *	next

Member Typedef Documentation

CleanupFunction

typedef void(* leveldb::Iterator::CleanupFunction) (void *arg1, void *arg2)

Definition at line 75 of file iterator.h.

Constructor & Destructor Documentation

Iterator() [1/2]

leveldb::Iterator::Iterator

(

)

Definition at line 9 of file iterator.cc.

                   {
  cleanup_.function = NULL;
  cleanup_.next = NULL;
}

~Iterator()

leveldb::Iterator::~Iterator ( )

virtual

Definition at line 14 of file iterator.cc.

                    {
  if (cleanup_.function != NULL) {
    (*cleanup_.function)(cleanup_.arg1, cleanup_.arg2);
    for (Cleanup* c = cleanup_.next; c != NULL; ) {
      (*c->function)(c->arg1, c->arg2);
      Cleanup* next = c->next;
      delete c;
      c = next;
    }
  }
}

Iterator() [2/2]

leveldb::Iterator::Iterator ( const Iterator &  )

private

Member Function Documentation

key()

virtual Slice leveldb::Iterator::key ( ) const

pure virtual

Implemented in leveldb::ModelDB::ModelIter, leveldb::KeyConvertingIterator, leveldb::Version::LevelFileNumIterator, leveldb::Block::Iter, leveldb::anonymous_namespace{merger.cc}::MergingIterator, leveldb::anonymous_namespace{db_iter.cc}::DBIter, leveldb::MemTableIterator, leveldb::anonymous_namespace{iterator.cc}::EmptyIterator, and leveldb::anonymous_namespace{two_level_iterator.cc}::TwoLevelIterator.

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Next()

virtual void leveldb::Iterator::Next ( )

pure virtual

Implemented in leveldb::ModelDB::ModelIter, leveldb::KeyConvertingIterator, leveldb::Version::LevelFileNumIterator, leveldb::Block::Iter, leveldb::anonymous_namespace{db_iter.cc}::DBIter, leveldb::MemTableIterator, leveldb::anonymous_namespace{merger.cc}::MergingIterator, leveldb::anonymous_namespace{iterator.cc}::EmptyIterator, and leveldb::anonymous_namespace{two_level_iterator.cc}::TwoLevelIterator.

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operator=()

void leveldb::Iterator::operator= ( const Iterator &  )

private

Prev()

virtual void leveldb::Iterator::Prev ( )

pure virtual

Implemented in leveldb::ModelDB::ModelIter, leveldb::KeyConvertingIterator, leveldb::Version::LevelFileNumIterator, leveldb::Block::Iter, leveldb::anonymous_namespace{merger.cc}::MergingIterator, leveldb::anonymous_namespace{db_iter.cc}::DBIter, leveldb::MemTableIterator, leveldb::anonymous_namespace{iterator.cc}::EmptyIterator, and leveldb::anonymous_namespace{two_level_iterator.cc}::TwoLevelIterator.

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RegisterCleanup()

void leveldb::Iterator::RegisterCleanup	(	CleanupFunction	function,
		void *	arg1,
		void *	arg2
	)

Definition at line 26 of file iterator.cc.

                                                                           {
  assert(func != NULL);
  Cleanup* c;
  if (cleanup_.function == NULL) {
    c = &cleanup_;
  } else {
    c = new Cleanup;
    c->next = cleanup_.next;
    cleanup_.next = c;
  }
  c->function = func;
  c->arg1 = arg1;
  c->arg2 = arg2;
}

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Seek()

virtual void leveldb::Iterator::Seek ( const Slice &  target )

pure virtual

Implemented in leveldb::ModelDB::ModelIter, leveldb::KeyConvertingIterator, leveldb::Version::LevelFileNumIterator, leveldb::Block::Iter, leveldb::anonymous_namespace{db_iter.cc}::DBIter, leveldb::MemTableIterator, leveldb::anonymous_namespace{merger.cc}::MergingIterator, leveldb::anonymous_namespace{iterator.cc}::EmptyIterator, and leveldb::anonymous_namespace{two_level_iterator.cc}::TwoLevelIterator.

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SeekToFirst()

virtual void leveldb::Iterator::SeekToFirst ( )

pure virtual

Implemented in leveldb::ModelDB::ModelIter, leveldb::KeyConvertingIterator, leveldb::Block::Iter, leveldb::Version::LevelFileNumIterator, leveldb::anonymous_namespace{db_iter.cc}::DBIter, leveldb::MemTableIterator, leveldb::anonymous_namespace{iterator.cc}::EmptyIterator, leveldb::anonymous_namespace{merger.cc}::MergingIterator, and leveldb::anonymous_namespace{two_level_iterator.cc}::TwoLevelIterator.

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SeekToLast()

virtual void leveldb::Iterator::SeekToLast ( )

pure virtual

Implemented in leveldb::ModelDB::ModelIter, leveldb::KeyConvertingIterator, leveldb::Block::Iter, leveldb::Version::LevelFileNumIterator, leveldb::anonymous_namespace{db_iter.cc}::DBIter, leveldb::MemTableIterator, leveldb::anonymous_namespace{iterator.cc}::EmptyIterator, leveldb::anonymous_namespace{merger.cc}::MergingIterator, and leveldb::anonymous_namespace{two_level_iterator.cc}::TwoLevelIterator.

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status()

virtual Status leveldb::Iterator::status ( ) const

pure virtual

Implemented in leveldb::ModelDB::ModelIter, leveldb::KeyConvertingIterator, leveldb::Version::LevelFileNumIterator, leveldb::Block::Iter, leveldb::anonymous_namespace{merger.cc}::MergingIterator, leveldb::anonymous_namespace{db_iter.cc}::DBIter, leveldb::MemTableIterator, leveldb::anonymous_namespace{iterator.cc}::EmptyIterator, and leveldb::anonymous_namespace{two_level_iterator.cc}::TwoLevelIterator.

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Valid()

virtual bool leveldb::Iterator::Valid ( ) const

pure virtual

Implemented in leveldb::ModelDB::ModelIter, leveldb::KeyConvertingIterator, leveldb::Version::LevelFileNumIterator, leveldb::Block::Iter, leveldb::anonymous_namespace{db_iter.cc}::DBIter, leveldb::MemTableIterator, leveldb::anonymous_namespace{iterator.cc}::EmptyIterator, leveldb::anonymous_namespace{two_level_iterator.cc}::TwoLevelIterator, and leveldb::anonymous_namespace{merger.cc}::MergingIterator.

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value()

virtual Slice leveldb::Iterator::value ( ) const

pure virtual

Implemented in leveldb::ModelDB::ModelIter, leveldb::KeyConvertingIterator, leveldb::Version::LevelFileNumIterator, leveldb::Block::Iter, leveldb::anonymous_namespace{merger.cc}::MergingIterator, leveldb::anonymous_namespace{db_iter.cc}::DBIter, leveldb::MemTableIterator, leveldb::anonymous_namespace{iterator.cc}::EmptyIterator, and leveldb::anonymous_namespace{two_level_iterator.cc}::TwoLevelIterator.

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Member Data Documentation

cleanup_

Cleanup leveldb::Iterator::cleanup_

private

Definition at line 85 of file iterator.h.

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

• include/leveldb/iterator.h
• table/iterator.cc