IlsHashKeyManager

Category

Modeling class

Inheritance Path

IlsHashKeyManager

Description

This class is used with set-relations. 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.

Libraries

Header File

#include <ilserver/model.h>

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.