@Override
public void format(AssociationMessage message, ByteBuffer bb) {
if (null == message) {
throw new IllegalStateException("No ApplicationMessage set");
}
setType(message.getType());
ByteBuffer bbAppMessage = ByteBuffer.allocate(5000);
message.format(bbAppMessage);
presentationLength.setLength(
bbAppMessage.position()
+ message.getPresentationHeader().length
+ message.getPresentationTrailer().length);
length.setLength(
presentationLength.getByteCount() + sessionLength() + presentationLength.getLength());
bbAppMessage.flip();
Bits.putUnsignedByte(bb, type.asShort());
length.format(bb);
LengthInformation li = new LengthInformation();
for (ParameterIdentifier pi : parameterIdentifiers) {
Bits.putUnsignedByte(bb, pi.id);
li.setLength(pi.data.length);
li.format(bb);
bb.put(pi.data);
}
presentationLength.format(bb);
bb.put(message.getPresentationHeader());
bb.put(bbAppMessage);
bb.put(message.getPresentationTrailer());
}
@Override
public AssociationMessage parse(ByteBuffer bb) {
// Type and length are the session header
type = AssociationMessageType.valueOf(Bits.getUnsignedByte(bb));
length.parse(bb);
long end_pos = bb.position() + length.getLength();
LengthInformation li = new LengthInformation();
parameterIdentifiers.clear();
// Reads the session data as [identifier, length, payload]
short pi = Bits.getUnsignedByte(bb);
//
while (pi != 0xC1 && bb.position() < end_pos) {
li.parse(bb);
log.trace("Parameter Identifier:" + Integer.toHexString(pi));
byte[] bytes = new byte[(int) li.getLength()];
bb.get(bytes);
parameterIdentifiers.add(new ParameterIdentifier(pi, bytes));
if (bb.position() < end_pos) {
pi = Bits.getUnsignedByte(bb);
}
}
// Presentation header starts with 0xC1 followed by a length info
if (0xC1 == pi && bb.position() < end_pos) {
li.parse(bb);
}
AssociationMessage message = buildMessage(getType());
if (null == message) {
log.warn("Unimplemented message type:" + getType());
} else {
message.advancePastPresentationHeader(bb);
message.parse(bb);
}
bb.position(bb.position() + message.getPresentationTrailer().length);
return message;
}