POrdinalDictionary< K > Class Template Reference

#include <dict.h>

Inheritance diagram for POrdinalDictionary< K >:

List of all members.

Public Member Functions
Construction
	POrdinalDictionary ()
Overrides from class PObject
virtual PObject *	Clone () const
New functions for class
PINDEX	operator[] (const K &key) const
PBoolean	Contains (const K &key) const
virtual POrdinalKey *	GetAt (const K &key) const
virtual PBoolean	SetDataAt (PINDEX index, PINDEX ordinal)
virtual PBoolean	SetAt (const K &key, PINDEX ordinal)
virtual PINDEX	RemoveAt (const K &key)
const K &	GetKeyAt (PINDEX index) const
PINDEX	GetDataAt (PINDEX index) const
Protected Member Functions
	POrdinalDictionary (int dummy, const POrdinalDictionary *c)

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Detailed Description

template<class K>
class POrdinalDictionary< K >

This template class maps the PAbstractDictionary to a specific key type and a POrdinalKey data type. The functions in this class primarily do all the appropriate casting of types.

Note that if templates are not used the PDECLARE_ORDINAL_DICTIONARY macro will simulate the template instantiation.

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Constructor & Destructor Documentation

template<class K>

POrdinalDictionary< K >::POrdinalDictionary

(

)

[inline]

Create a new, empty, dictionary.

Note that by default, objects placed into the dictionary will be deleted when removed or when all references to the dictionary are destroyed.

template<class K>

POrdinalDictionary< K >::POrdinalDictionary	(	int	dummy,
		const POrdinalDictionary< K > *	c
	)			[inline, protected]

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Member Function Documentation

template<class K>

virtual PObject* POrdinalDictionary< K >::Clone

(

)

const [inline, virtual]

Make a complete duplicate of the dictionary. Note that all objects in the array are also cloned, so this will make a complete copy of the dictionary.

Reimplemented from PObject.

template<class K>

PBoolean POrdinalDictionary< K >::Contains

(

const K &

key

)

const [inline]

Determine if the value of the object is contained in the hash table. The object values are compared, not the pointers. So the objects in the collection must correctly implement the PObject::Compare() function. The hash table is used to locate the entry.

Returns:

PTrue if the object value is in the dictionary.

Parameters:

key	Key to look for in the dictionary.

template<class K>

virtual POrdinalKey* POrdinalDictionary< K >::GetAt

(

const K &

key

)

const [inline, virtual]

Parameters:

key	Key for position in dictionary to get object.

template<class K>

PINDEX POrdinalDictionary< K >::GetDataAt

(

PINDEX

index

)

const [inline]

Get the data in the dictionary at the ordinal index position.

The ordinal position in the dictionary is determined by the hash values of the keys and the order of insertion.

The last key/data pair is remembered by the class so that subseqent access is very fast.

Returns:

reference to data at the index position.

Parameters:

index

Ordinal position in dictionary for data.

template<class K>

const K& POrdinalDictionary< K >::GetKeyAt

(

PINDEX

index

)

const [inline]

Get the key in the dictionary at the ordinal index position.

The ordinal position in the dictionary is determined by the hash values of the keys and the order of insertion.

The last key/data pair is remembered by the class so that subseqent access is very fast.

Returns:

reference to key at the index position.

Parameters:

index

Ordinal position in dictionary for key.

template<class K>

PINDEX POrdinalDictionary< K >::operator[]

(

const K &

key

)

const [inline]

Get the object contained in the dictionary at the key position. The hash table is used to locate the data quickly via the hash function provided by the key.

The last key/data pair is remembered by the class so that subseqent access is very fast.

Returns:

reference to the object indexed by the key.

template<class K>

virtual PINDEX POrdinalDictionary< K >::RemoveAt

(

const K &

key

)

[inline, virtual]

Remove an object at the specified key. The returned pointer is then removed using the SetAt() function to set that key value to NULL. If the AllowDeleteObjects option is set then the object is also deleted.

Returns:

pointer to the object being removed, or NULL if it was deleted.

Parameters:

key	Key for position in dictionary to get object.

template<class K>

virtual PBoolean POrdinalDictionary< K >::SetAt	(	const K &	key,
		PINDEX	ordinal
	)			[inline, virtual]

Add a new object to the collection. If the objects value is already in the dictionary then the object is overrides the previous value. If the AllowDeleteObjects option is set then the old object is also deleted.

The object is placed in the an ordinal position dependent on the keys hash function. Subsequent searches use the hash function to speed access to the data item.

Returns:

PTrue if the object was successfully added.

Parameters:

key	Key for position in dictionary to add object.
ordinal	New ordinal value to put into the dictionary.

template<class K>

virtual PBoolean POrdinalDictionary< K >::SetDataAt	(	PINDEX	index,
		PINDEX	ordinal
	)			[inline, virtual]

Set the data at the specified ordinal index position in the dictionary.

The ordinal position in the dictionary is determined by the hash values of the keys and the order of insertion.

Returns:

PTrue if the new object could be placed into the dictionary.

Parameters:

index	Ordinal index in the dictionary.
ordinal	New ordinal value to put into the dictionary.

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

• dict.h

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