IlsHashKeyManager Class Reference

This class is used with set-relations. More...

#include <ilserver/thash.h>

Inherited by IlsCashMapKeyManager, IlsComputedPerDraftKeyManager, IlsComputedPerOriginalKeyManager, IlsEntryNValueKeyManager, IlsRefCountedTableKeyManager, IlsSentinelsPerDraftKeyManager, IlsSentinelsPerOriginalKeyManager, IlsSwComponent::_IlsContainers_manager, IlsSwComponent::_IlsDataSources_manager, IlsSwComponent::_IlsSwInFormConvManager, IlsSwComponent::_IlsSwServerConvManager, IlsSwComponent::_IlsSwServerNamedConvManager, IlsSwRepresentation::_ecbManager, IlsUpdatedCompositeTableKeyManager, IlsUpdatedSizedCompositeTableKeyManager, and IlsViewedMapKeyManager.

Detailed Description

This class is used with set-relations.

Library: server
and mvcomp

Objects added to a set are stored together with their associated key in a C++ array, called a hash code table, and are indexed using an integer. The class IlsHashKeyManager contains functions that convert the key type used to store objects in a set to an integer.

Synopsis

class IlsHashKeyManager
{
public:
  static long Hash(int key, int size);
  static long Hash(long key, int size);
  static long Hash(unsigned long key, int size);
  static long Hash(const char* key, int size);
  static long Hash(char* key, int size);
  static long Hash(void* key, int size);
  static IlsBoolean Match(char, char);
  static IlsBoolean Match(int, int);
  static IlsBoolean Match(unsigned char, unsigned char);
  static IlsBoolean Match(short, short);
  static IlsBoolean Match(unsigned short, unsigned short);
  static IlsBoolean Match(unsigned int, unsigned int);
  static IlsBoolean Match(long, long);
  static IlsBoolean Match(unsigned long, unsigned long);
  static IlsBoolean Match(float, float);
  static IlsBoolean Match(double, double);
  static IlsBoolean Match(const char*, const char*);
  static IlsBoolean Match(char*, char*);
  static IlsBoolean Match(const void*, const void*);
  static IlsBoolean Match(void*, void*);
};

• The static member functions IlsHashKeyManager::Hash() are automatically called by Rogue Wave Server. They return a long integer – contained between 0 and the size of the array minus 1 included – obtained from hashing the first argument.
• The static member functions IlsHashKeyManager::Match() compare the keys specified and return IlsTrue if both arguments are identical. If the arguments are of type const char*, then the comparison applies to character strings.

See also

IlsOwnsSet, IlsUsesSet