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https://issues.apache.org/jira/browse/DIRMINA-242?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Emmanuel Lecharny closed DIRMINA-242.
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> ByteBuffer.getString(ByteBuffer buf, int fieldSize, CharsetDecoder decoder,
> boolean stopOnZero )
> ------------------------------------------------------------------------------------------------
>
> Key: DIRMINA-242
> URL: https://issues.apache.org/jira/browse/DIRMINA-242
> Project: MINA
> Issue Type: New Feature
> Affects Versions: 0.8.2
> Reporter: Pavel Zdenek
> Assignee: Trustin Lee
> Priority: Trivial
>
> The method would read an ASCIIZ string off the buffer as the existing method
> without added parameter.
> If stopOnZero is false, it would continue blindly reading the stream up to
> the required fieldSize.
> So far MINA has no support for reading fixed (small) size strings. This is
> common for protocols constructed at devices with limited resources (i.e.
> network attached microcontrollers) and above the mandatory ending zero may be
> whatever garbage left from previous memory usage.
> My temporary implementation follows, to get the idea.
> It also solves the problem with getString behavior when reading ASCIIZ at the
> end of buffer (apparently fixed in dev 0.9)
> public static String getString(ByteBuffer buf, int fieldSize,
> CharsetDecoder decoder, boolean stopOnZero )
> throws CharacterCodingException
> {
> if( fieldSize == 0) fieldSize = buf.remaining(); // convenience "0 ~
> till the end"
> int origLimit = buf.limit();
> int posStrEnd = 0;
> buf.mark(); // beginning of string
> boolean foundZero = false;
> while(buf.hasRemaining() && (fieldSize-- > 0) )
> {
> if( (buf.get() == 0) && !foundZero )
> {
> foundZero = true;
> posStrEnd = buf.position()-1;
> if( stopOnZero ) break;
> }
> }
> int reachedPos = buf.position(); // later must return here
> buf.reset(); // position to string begin
> if(foundZero) buf.limit( posStrEnd );
> String str = buf.getString(decoder);
> if(foundZero) buf.limit(origLimit);
> buf.position(reachedPos);
> return str;
> }
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