Package com.opencloud.slee.resources.in.datatypes.sms

Class GSM7BitAlphabet

java.lang.Object

com.opencloud.slee.resources.in.datatypes.sms.GSM7BitAlphabet

public class GSM7BitAlphabet
extends Object

Utilities for translating between Strings and values in the GSM 7-bit alphabet, as defined in 3GPP TS 23.038 section 6.2.1.

This class deals in terms of "unpacked" values, stored as one 7-bit value per byte. To transform this to the packed representations needed by SMS/CBS/USSD, use the methods in GSM7BitPacking.

Method Summary

Modifier and Type	Method	Description
static int	countCharacters(String src)	Count the number of 7-bit characters needed to represent a given String (including escapes)
static String	decode(byte[] src, int srcpos, int count)	Decode an unpacked representation in the 7-bit alphabet to a String
static void	encode(String src, byte[] dst, int dstpos)	Encode a String to an unpacked 7-bit representation

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

decode

public static String decode(byte[] src,
                            int srcpos,
                            int count)

Decode an unpacked representation in the 7-bit alphabet to a String

Parameters:

src - the array to read from

srcpos - the offset (in bytes) in src to read

count - the number of codes to read

Returns:

a decoded String

encode

public static void encode(String src,
                          byte[] dst,
                          int dstpos)

Encode a String to an unpacked 7-bit representation

Parameters:

src - the string to encode

dst - the array to encode to

dstpos - the offset within dst to start at

countCharacters

public static int countCharacters(String src)

Count the number of 7-bit characters needed to represent a given String (including escapes)

Parameters:

src - the string to examine

Returns:

number of 7-bit characters needed to represent src, or -1 if there are unsupported characters present