BTree< K, V, ORDER > Class Template Reference

A balanced, n-ary tree data structure for storing key/value relationships. More...

#include <BTree.h++>

List of all members.

Classes
struct	_Datum
struct	_Node
class	Iterator
	A BTree iterator. More...
Public Member Functions
	BTree (size_t capacity)
	Construct a new BTree with the given maximum capacity.
virtual	~BTree ()
	Destructor.
bool	put (const K key, const V data)
	Put a new item in the tree.
bool	remove (const K key)
	Remove an item from the tree.
V	get (const K key)
	Get an item from the tree.
bool	contains (const K key) const
	Determine if an item with the given key exists in the tree.
void	dump (std::ostream &stream) const
	Dump a representation of the tree (keys only) to a stream.
void	getKeys (std::list< K > &keys) const
	Get a list of all of the keys in the tree, in access-order.
void	getValues (std::list< V > &values) const
	Get a list of all of the values in the tree, in access-order.
void	clear ()
	Remove all items from the tree.
size_t	getCapacity () const throw ()
	Get the tree capacity.
Protected Member Functions
virtual void	itemDropped (V data) const
	Called whenever an item is removed from the BTree to make room for another.

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Detailed Description

template<typename K, typename V, int ORDER = 10>
class ccxx::BTree< K, V, ORDER >

A balanced, n-ary tree data structure for storing key/value relationships.

The BTree has a configurable order and maximum capacity. The items are ordered internally by last access time. When the maximum capacity has been reached, and a new item is added to the tree, the least-recently accessed item is automatically removed.

Author:

Mark Lindner

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Constructor & Destructor Documentation

BTree

(

size_t

capacity

)

Construct a new BTree with the given maximum capacity.

Parameters:

capacity

The maximum number of items the tree will hold.

virtual ~BTree

(

)

[virtual]

Destructor.

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Member Function Documentation

void clear

(

)

Remove all items from the tree.

bool contains

(

const K

key

)

const

Determine if an item with the given key exists in the tree.

Parameters:

key

The key.

Returns:

true if there is a matching key in the tree, false otherwise.

void dump

(

std::ostream &

stream

)

const

Dump a representation of the tree (keys only) to a stream.

Parameters:

stream

The stream to write to.

V get

(

const K

key

)

Get an item from the tree.

Parameters:

key

The key.

Returns:

The data associated with the key, otherwise a NULL value.

size_t getCapacity

(

)

const throw () [inline]

Get the tree capacity.

void getKeys

(

std::list< K > &

keys

)

const

Get a list of all of the keys in the tree, in access-order.

Parameters:

keys

The list in which to store the keys.

void getValues

(

std::list< V > &

values

)

const

Get a list of all of the values in the tree, in access-order.

Parameters:

values

The list in which to store the values.

virtual void itemDropped

(

V

data

)

const [protected, virtual]

Called whenever an item is removed from the BTree to make room for another.

Parameters:

data

The value that was removed.

bool put	(	const K	key,
		const V	data
	)

Put a new item in the tree.

Parameters:

	key	The key.
	data	The data to associate with the key.

bool remove

(

const K

key

)

Remove an item from the tree.

Parameters:

key

The key.

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

• BTree.h++