Asn1CharRange Class Reference

Inheritance diagram for Asn1CharRange:

Public Member Functions
	Asn1CharRange (int lower, int upper)
override int	GetCharAtIndex (int index)
override int	GetCharIndex (int charValue)
override bool	validate (String s)
Public Member Functions inherited from Asn1CharSet
virtual int	GetNumBitsPerChar (bool aligned)

Properties
override int	MaxValue [get]
Properties inherited from Asn1CharSet
abstract int	MaxValue [get]

Detailed Description

This class is used to represent a permitted alphabet that is specified

as a large, continuous range of characters. An example of this can be found in the following extract from T.124:

simpleTextFirstCharacter UniversalString ::= {0, 0, 0, 0}

simpleTextLastCharacter UniversalString ::= {0, 0, 0, 255}

SimpleTextString ::= BMPString (SIZE (0..255))

(FROM (simpleTextFirstCharacter..simpleTextLastCharacter))

This class is mainly for internal use by the compiler when generating

methods that encode/Decode PER charater string components containing permitted alphabet constraints.

Constructor & Destructor Documentation

Asn1CharRange()

Asn1CharRange	(	int	lower,
		int	upper
	)

This constructor sets the range values.

Parameters

lower	Range lower value
upper	Range upper value

Member Function Documentation

GetCharAtIndex()

override int GetCharAtIndex ( int  index )

virtual

This method will fetch the character from the permitted alphabet at the given index.

Parameters

index

Index of character within the character set

Returns

Character at given index

Exceptions

Asn1ConsVioException

Index not within define range

Implements Asn1CharSet.

GetCharIndex()

override int GetCharIndex ( int  charValue )

virtual

This method will determine the index of the given character within the permitted alphabet character set.

Parameters

charValue

Character value to search for

Returns

Index of character

Exceptions

Asn1ConsVioException

Character not found in set

Implements Asn1CharSet.

validate()

override bool validate ( String  s )

virtual

This method will validate a character string by comparing its contents to the character range. Each character in the string is checked against the range. If it exceeds the upper or lower limit of the range, false is returned. Otherwise true is returned.

Parameters

s	The string to be validated.

Returns

False if the string contains invalid characters; true otherwise.

Implements Asn1CharSet.

Property Documentation

MaxValue

override int MaxValue

get

Gets the maximum value of character within the given permitted alphabet character set.

Value: Upper Bound Character or Character with max int value