private TransferCapability roleSelection(AAssociateRQ rq, AAssociateAC ac, String asuid) {
RoleSelection rqrs = rq.getRoleSelectionFor(asuid);
if (rqrs == null) return getTC(scpTCs, asuid, rq);
RoleSelection acrs = ac.getRoleSelectionFor(asuid);
if (acrs != null) return getTC(acrs.isSCU() ? scpTCs : scuTCs, asuid, rq);
TransferCapability tcscu = null;
TransferCapability tcscp = null;
boolean scu = rqrs.isSCU() && (tcscp = getTC(scpTCs, asuid, rq)) != null;
boolean scp = rqrs.isSCP() && (tcscu = getTC(scuTCs, asuid, rq)) != null;
ac.addRoleSelection(new RoleSelection(asuid, scu, scp));
return scu ? tcscp : tcscu;
}
protected PresentationContext negotiate(
AAssociateRQ rq, AAssociateAC ac, PresentationContext rqpc) {
String as = rqpc.getAbstractSyntax();
TransferCapability tc = roleSelection(rq, ac, as);
int pcid = rqpc.getPCID();
if (tc == null)
return new PresentationContext(
pcid, PresentationContext.ABSTRACT_SYNTAX_NOT_SUPPORTED, rqpc.getTransferSyntax());
for (String ts : rqpc.getTransferSyntaxes())
if (tc.containsTransferSyntax(ts)) {
byte[] info = negotiate(rq.getExtNegotiationFor(as), tc);
if (info != null) ac.addExtendedNegotiation(new ExtendedNegotiation(as, info));
return new PresentationContext(pcid, PresentationContext.ACCEPTANCE, ts);
}
return new PresentationContext(
pcid, PresentationContext.TRANSFER_SYNTAX_NOT_SUPPORTED, rqpc.getTransferSyntax());
}