- Direct Known Subclasses:
- AlphabetEncoding, BinaryEncoding
public abstract class MessageEncoding
- extends Object
Get the correct data_coding value for this message encoding type.
Get the number of bits each encoded message byte represents.
|Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
protected MessageEncoding(int dataCoding)
public final int getDataCoding()
- Get the correct data_coding value for this message encoding type.
public int getEncodingLength()
- Get the number of bits each encoded message byte represents. This method
will almost always return 8. The only known situation at this time where
the value should be different is in
DefaultAlphabetEncoding. The reason is that,
DefaultAlphabetEncoding will generate encoded
message byte arrays with one character in each byte location, in reality
each byte actually represents only 7-bits. When the message is re-encoded
at the SMSC, it will be compressed. This is how the GSM default alphabet
can fit 160 characters into a 140-byte payload. Most SMSCs, however,
accept the message in its uncompressed form.
It is not correct to return a value of 16 from an AlphabetEncoding which
encodes characters in 2 or more bytes. The reason that, although a
character is encoding as 2 bytes, in the encoded form each byte
location still represents 8 bits . This is an important distinction.
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