Oracle Fusion Middleware C++ API Reference for Oracle Coherence
12c (12.1.2)
E26041-01

IdentityHashMap Class Reference

#include <coherence/util/IdentityHashMap.hpp>

Inherits SafeHashMap.

List of all members.

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Detailed Description

IdentityHashMap is a HashMap implementation where key equality is based on reference rather then value equality.

Author:

mf 2008.05.27

Public Types
typedef spec::Handle	Handle
	IdentityHashMap Handle definition.
typedef spec::View	View
	IdentityHashMap View definition.
typedef spec::Holder	Holder
	IdentityHashMap Holder definition.
Protected Member Functions
	IdentityHashMap (size32_t cInitialBuckets=17, float32_t flLoadFactor=1.0F, float32_t flGrowthRate=3.0F)
	Construct a thread-safe weak hash map using the specified settings.
	IdentityHashMap (const IdentityHashMap &that)
	Copy Constructor.
virtual SafeHashMap::Entry::Handle	instantiateEntry (Object::View vKey, Object::Holder ohValue, size32_t nHash)
	Factory pattern, initialized with the specified valued. Parameters: vKey  the associated key ohValue  the assocaited value nHash  the associated hash code Returns: a new instance of the Entry class (or a subclass thereof)
virtual SafeHashMap::Entry::Handle	instantiateEntry (SafeHashMap::Entry::View vEntry)
	Factory pattern, instantiate an Entry that is either a deep or shalow copy. Parameters: vEntry  the Entry to copy fDeep  whether to make a deep copy of the Entry or not
virtual size32_t	getHashCode (Object::View vKey) const
	Return the hash code to use for the specified key. Parameters: vKey  the key to hash Returns: the hash code to use for the key
Classes
class	Entry
	A Map::Entry where key equality is based on reference equality. More...

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Constructor & Destructor Documentation

IdentityHashMap	(	size32_t	cInitialBuckets = 17,
		float32_t	flLoadFactor = 1.0F,
		float32_t	flGrowthRate = 3.0F
	)			[protected]

Construct a thread-safe weak hash map using the specified settings.

Parameters:

	cInitialBuckets	the initial number of hash buckets, 0 < n
	flLoadFactor	the acceptable load factor before resizing occurs, 0 < n, such that a load factor of 1.0 causes resizing when the number of entries exceeds the number of buckets
	flGrowthRate	the rate of bucket growth when a resize occurs, 0 < n, such that a growth rate of 1.0 will double the number of buckets: bucketcount = bucketcount * (1 + growthrate)

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

• coherence/util/IdentityHashMap.hpp

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